RAM Chassis Cab (2021 year). Manual in english — page 20

314

SERVICING AND MAINTENANCE

(Continued)

C

HECKING

O

IL

L

EVEL

To ensure proper engine lubrication, the engine oil

must be maintained at the correct level. Check the

oil level at regular intervals, such as every fuel

stop. The best time to check the engine oil level is

about five minutes after a fully warmed up engine

is shut off.
Checking the oil while the vehicle is on level ground

will improve the accuracy of the oil level readings.
There are four possible dipstick types:



Crosshatched zone.



Crosshatched zone marked SAFE.



Crosshatched zone marked with MIN at the low

end of the range and MAX at the high end of the

range.



Crosshatched zone marked with dimples at the

MIN and the MAX ends of the range.

NOTE:

Always maintain the oil level within the crosshatch

markings on the dipstick.
Adding 1 quart (1 liter) of oil when the reading is at

the low end of the dipstick range will raise the oil

level to the high end of the range marking.

A

DDING

W

ASHER

F

LUID

The fluid reservoir is located under the hood and

should be checked for fluid level at regular

intervals. Fill the reservoir with windshield washer

solvent only (not radiator antifreeze). When

refilling the washer fluid reservoir, take some

washer fluid and apply it to a cloth or towel and

wipe the wiper blades clean. This will help blade

performance.
To prevent freeze-up of your windshield washer

system in cold weather, select a solution or mixture

that meets or exceeds the temperature range of

your climate. This rating information can be found

on most washer fluid containers.

After the engine has warmed up, operate the

defroster for a few minutes to reduce the

possibility of smearing or freezing the fluid on the

cold windshield. Windshield washer solution used

with water as directed on the container, aids

cleaning action, reduces the freezing point to avoid

line clogging, and is not harmful to paint or trim.

M

AINTENANCE

-F

REE

B

ATTERY

Your vehicle is equipped with a maintenance-free

battery. You will never have to add water, and

periodic maintenance is not required.
NOTE:

Replacement batteries should both be of equal

capacity to prevent damage to the vehicle's

charging system.

CAUTION!

Overfilling or underfilling the crankcase will

cause oil aeration or loss of oil pressure. This

could damage your engine.

WARNING!

Commercially available windshield washer

solvents are flammable. They could ignite and

burn you. Care must be exercised when filling or

working around the washer solution.

WARNING!



Battery fluid is a corrosive acid solution and

can burn or even blind you. Do not allow

battery fluid to contact your eyes, skin, or

clothing. Do not lean over a battery when

attaching clamps. If acid splashes in eyes or

on skin, flush the area immediately with large

amounts of water

Ú

page 295.

SERVICING AND MAINTENANCE

315

P

RESSURE

W

ASHING

Cleaning the engine compartment with a high

pressure washer is not recommended.

VEHICLE MAINTENANCE

An authorized dealer has the qualified service

personnel, special tools, and equipment to

perform all service operations in an expert

manner. Service Manuals are available which

include detailed service information for your

vehicle. Refer to these Service Manuals before

attempting any procedure yourself.
NOTE:

Intentional tampering with emissions control

systems may void your warranty and could result in

civil penalties being assessed against you.

E

NGINE

O

IL

Engine Oil Selection — Gasoline Engine

For best performance and maximum protection

under all types of operating conditions, the

manufacturer only recommends engine oils that

are API Certified and meet the requirements of the

manufacturer Material Standard MS-12633.
NOTE:

Hemi engines (6.4L) at times can tick right after

startup and then quiet down after approximately

30 seconds. This is normal and will not harm the

engine. This characteristic can be caused by short

drive cycles. For example, if the vehicle is started

then shut off after driving a short distance. Upon

restarting, you may experience a ticking sound.

Other causes could be if the vehicle is unused for an

extended period of time, incorrect oil, extended oil

changes or extended idling. If the engine continues

to tick or if the Malfunction Indicator Light (MIL)

comes on, see the nearest authorized dealer.



Battery gas is flammable and explosive. Keep

flame or sparks away from the battery. Do not

use a booster battery or any other booster

source with an output greater than 12 Volts.

Do not allow cable clamps to touch each other.



Battery posts, terminals, and related accesso

-

ries contain lead and lead compounds. Wash

hands after handling.

CAUTION!



It is essential when replacing the cables on

the battery that the positive cable is attached

to the positive post and the negative cable is

attached to the negative post. Battery posts

are marked positive (+) and negative (-) and

are identified on the battery case. Cable

clamps should be tight on the terminal posts

and free of corrosion.



If a “fast charger” is used while the battery is

in the vehicle, disconnect both vehicle battery

cables before connecting the charger to the

battery. Do not use a “fast charger” to provide

starting voltage.

WARNING!

CAUTION!

Precautions have been taken to safeguard all

parts and connections however, the pressures

generated by these machines is such that com

-

plete protection against water ingress cannot be

guaranteed.

WARNING!

You can be badly injured working on or around a

motor vehicle. Only do service work for which

you have the knowledge and the proper equip

-

ment. If you have any doubt about your ability to

perform a service job, take your vehicle to a

competent mechanic.

8

316

SERVICING AND MAINTENANCE

Engine Oil Selection — Diesel Engine

For best performance and maximum protection

under all types of operating conditions, the

manufacturer only recommends engine oils that

are API CK-4 certified and meet the requirements

of the manufacturer. Use Mopar® or an equivalent

oil meeting the manufacturer Material Standard

MS-10902. Products meeting Cummins® CES

20081 may also be used. The identification of

these engine oils are typically located on the back

of the oil container.

American Petroleum Institute (API) Engine

Oil Identification Symbol

This symbol means that the oil has been

certified by the API. The manufacturer

only recommends API Certified engine

oils.

This symbol certifies 0W-20, 5W-20, 0W-30,

5W-30 and 10W-30 engine oils.
For diesel engines, oils with a high ash content may

produce damaging deposits on cylinder head

valves and/or after-treatment system damage. A

maximum sulfated ash content of 1.00 mass % is

recommended for all oil used in the engine.
The same oil change interval is to be followed for

synthetic oil as for petroleum-based oil. Also,

synthetic oil must meet the same performance

specifications as petroleum oil.

Synthetic Engine Oils

You may use synthetic engine oils provided the

recommended oil quality requirements are met,

and the recommended maintenance intervals for

oil and filter changes are followed.
Synthetic engine oils which do not have both the

engine oil certification mark and the correct SAE

viscosity grade number should not be used.

Materials Added To Engine Oil

The manufacturer strongly recommends against

the addition of any additives (other than leak

detection dyes) to the engine oil. Engine oil is an

engineered product and its performance may be

impaired by supplemental additives.

Disposing Of Used Engine Oil And Oil

Filters

Care should be taken in disposing of used engine

oil and oil filters from your vehicle. Used oil and oil

filters, indiscriminately discarded, can present a

problem to the environment. Contact an

authorized dealer, service station or governmental

agency for advice on how and where used oil and

oil filters can be safely discarded in your area.

E

NGINE

O

IL

F

ILTER

The engine oil filter should be replaced with a new

filter at every engine oil change.
Engine Oil Filter Selection
A full-flow type disposable oil filter should be used

for replacement. The quality of replacement filters

varies considerably. Only high quality Mopar®

certified filters should be used.

E

NGINE

A

IR

C

LEANER

F

ILTER

For the proper maintenance intervals

Ú

page 303.

NOTE:

Be sure to follow the “Severe Duty Conditions”

maintenance interval if applicable.

CAUTION!

Do not use chemical flushes in your engine oil as

the chemicals can damage your engine. Such

damage is not covered by the New Vehicle

Limited Warranty.

WARNING!

The air induction system (air cleaner, hoses,

etc.) can provide a measure of protection in the

case of engine backfire. Do not remove the air

induction system (air cleaner, hoses, etc.) unless

such removal is necessary for repair or

maintenance. Make sure that no one is near the

engine compartment before starting the vehicle

with the air induction system (air cleaner, hoses,

etc.) removed. Failure to do so can result in

serious personal injury.

SERVICING AND MAINTENANCE

317

Engine Air Cleaner Filter Selection
The quality of replacement engine air cleaner

filters varies considerably. Only high quality filters

should be used to ensure most efficient service.

Mopar® engine air cleaner filters are a high quality

filter and are recommended.

Engine Air Cleaner Filter Inspection And

Replacement — Gasoline Engine

Inspect engine air cleaner filter for dirt and or

debris, if you find evidence of either dirt or debris

you should change your engine air cleaner filter.
NOTE:

When replacing the engine air cleaner filter on

vehicles equipped with a 6.4L gasoline engine,

replace with a dry (non-oiled) filter only.

Engine Air Cleaner Filter Removal
1. With suitable tool fully loosen (six) fasteners

on engine air cleaner filter.

Engine Air Cleaner Filter

2. Lift the engine air cleaner filter cover to access

the engine air cleaner filter.

3. Remove the engine air cleaner filter from the

housing assembly.

Engine Air Cleaner Filter Assembly

Engine Air Cleaner Filter Installation
NOTE:

Inspect and clean the housing if dirt or debris is

present before replacing the engine air cleaner

filter.
1. Install the engine air cleaner filter into the

housing assembly with the engine air cleaner

filter inspection surface facing downward.

2. Install the engine air cleaner filter cover onto

the housing assembly.

3. Tighten the fasteners (six) on the engine air

cleaner filter assembly.

1 — Fasteners
2 — Air Hose Clamp
3 — Engine Air Cleaner Filter Cover

1 — Engine Air Cleaner Filter Cover
2 — Engine Air Cleaner Filter

8

318

SERVICING AND MAINTENANCE

Engine Air Cleaner Filter Inspection and

Replacement — Diesel Engine

Inspect engine air cleaner filter for dirt and or

debris, if you find evidence of either dirt or debris

you should change your engine air cleaner filter.
Engine Air Cleaner Filter Removal
1. Remove the screws from the engine air

cleaner filter cover.

Engine Air Cleaner Filter Cover

2. Lift the engine air cleaner filter cover to access

the engine air cleaner filter.

3. Remove the engine air cleaner filter from the

housing assembly.

Engine Air Cleaner Filter

Engine Air Cleaner Filter Installation
NOTE:

Inspect and clean the housing if dirt or debris is

present before replacing the engine air cleaner

filter.
1. Install the engine air cleaner filter into the

housing assembly with the engine air cleaner

filter inspection surface facing downward.

2. Install the engine air cleaner filter cover onto

the housing assembly locating tabs.

3. Install screws to secure the engine air cleaner

filter cover to the housing assembly.

A

IR

C

ONDITIONER

M

AINTENANCE

For best possible performance, your air conditioner

should be checked and serviced by an authorized

dealer at the start of each warm season. This

service should include cleaning of the condenser

fins and a performance test. Drive belt tension

should also be checked at this time.

1 — Engine Air Cleaner Filter Cover
2 — Screws

1 — Engine Air Cleaner Filter
2 — Engine Air Cleaner Filter Inspection Surface

WARNING!



Use only refrigerants and compressor lubri

-

cants approved by the manufacturer for your

air conditioning system. Some unapproved

refrigerants are flammable and can explode,

injuring you. Other unapproved refrigerants or

lubricants can cause the system to fail,

requiring costly repairs. Refer to Warranty

Information Book, for further warranty infor

-

mation.



The air conditioning system contains refrig

-

erant under high pressure. To avoid risk of

personal injury or damage to the system,

adding refrigerant or any repair requiring lines

to be disconnected should be done by an

experienced technician.

SERVICING AND MAINTENANCE

319

Refrigerant Recovery And Recycling

R-134a — If Equipped

R-134a Air Conditioning Refrigerant is a hydrofluo

-

rocarbon (HFC) that is an ozone-friendly

substance. The manufacturer recommends that

air conditioning service be performed by an

authorized dealer or other service facilities using

recovery and recycling equipment.
NOTE:

Use only manufacturer approved A/C system PAG

compressor oil and refrigerants.

Refrigerant Recovery And Recycling

R-1234yf — If Equipped

R-1234yf Air Conditioning Refrigerant is a hydroflu

-

oroolefin (HFO) that is endorsed by the

Environmental Protection Agency and is an

ozone-friendly substance with a low

global-warming potential. The manufacturer

recommends that air conditioning service be

performed by an authorized dealer using recovery

and recycling equipment.
NOTE:

Use only manufacturer approved A/C system PAG

compressor oil, and refrigerants.

Cabin Air Filter Replacement

For the proper maintenance intervals

Ú

page 303.

The cabin air filter is located in the fresh air inlet

behind the glove compartment. Perform the

following procedure to replace the filter:
1. Open the glove compartment and remove all

contents.

2. With the glove compartment door open,

remove the glove compartment tension tether

and tether clip by sliding the clip toward the

face of the glove compartment door. Lift the

clip out of glove compartment door and

release into dash panel.

Right Side Of Glove Compartment

CAUTION!

Do not use chemical flushes in your air condi

-

tioning system as the chemicals can damage

your air conditioning components. Such damage

is not covered by the New Vehicle Limited War

-

ranty.

WARNING!

Do not remove the cabin air filter while the

vehicle is running, or while the ignition is in the

ACC or ON/RUN mode. With the cabin air filter

removed and the blower operating, the blower

can contact hands and may propel dirt and

debris into your eyes, resulting in personal injury.

1 — Glove Compartment Door
2 — Glove Compartment Tension Tether

8

320

SERVICING AND MAINTENANCE

3. There are travel stops on both sides of the

glove compartment. Push inward on right side

of the glove compartment travel stop to

disengage the stop. Then pull the right of the

glove compartment outward (away from the

hinge) to disengaging the right side of the

compartment from the hinge. Continue by

removing the left side from the hinge by slightly

lowering the compartment while pulling

outward until it is completely disengaged from

the hinge.

Glove Compartment

4. Remove the filter cover by pushing in on the

finger tabs on each end of the filter cover.

Filter Cover

Filter Cover Removal

5. Remove the cabin air filter by pulling it straight

out of the housing.

Cabin Air Filter

6. Install the cabin air filter with the arrow on the

filter pointing toward the floor. When installing

the filter cover, press on each end until you

hear an audible click.

7. Reinstall the glove compartment on the

hinges.

1 — Glove Compartment Travel Stop
2 — Glove Compartment Tension Tether
3 — Glove Compartment Door

1 — Finger Tabs

CAUTION!

The cabin air filter is identified with an arrow to

indicate airflow direction through the filter.

Failure to properly install the filter will result in

the need to replace it more often.

SERVICING AND MAINTENANCE

321

8. Pull the tension tether outward and reinstall

the glove compartment past the travel stops by

pushing in on the glove compartment sides.

Glove Compartment

NOTE:

Ensure the glove compartment door hinges and

glove compartment travel stops are fully engaged.
9. Reattach the glove compartment tension

tether by inserting the tether clip in the glove

compartment and sliding the clip away from

the face of the glove compartment door.

A

CCESSORY

D

RIVE

B

ELT

I

NSPECTION

When inspecting accessory drive belts, small

cracks that run across ribbed surface of belt from

rib to rib, are considered normal. These are not a

reason to replace belt. However, cracks running

along a rib (not across) are not normal. Any belt

with cracks running along a rib must be replaced.

Also have the belt replaced if it has excessive wear,

frayed cords or severe glazing.

Accessory Belt (Serpentine Belt)

Conditions that would require replacement:



Rib chunking (one or more ribs has separated

from belt body)



Rib or belt wear



Longitudinal belt cracking (cracks between two

ribs)



Belt slips



“Groove jumping" (belt does not maintain

correct position on pulley)



Belt broken (note: identify and correct problem

before new belt is installed)



Noise (objectionable squeal, squeak, or rumble

is heard or felt while drive belt is in operation)

1 — Glove Compartment Travel Stop
2 — Glove Compartment Tension Tether
3 — Glove Compartment Door

WARNING!



Do not attempt to inspect an accessory drive

belt with vehicle running.



When working near the radiator cooling fan,

disconnect the fan motor lead. The fan is

temperature controlled and can start at any

time regardless of ignition mode. You could be

injured by the moving fan blades.



You can be badly injured working on or around

a motor vehicle. Only do service work for which

you have the knowledge and the proper equip

-

ment. If you have any doubt about your ability

to perform a service job, take your vehicle to a

competent mechanic.

8

322

SERVICING AND MAINTENANCE

Some conditions can be caused by a faulty

component such as a belt pulley. Belt pulleys

should be carefully inspected for damage and

proper alignment.
Belt replacement on some models requires the

use of special tools, we recommend having your

vehicle serviced at an authorized dealer.

D

RAINING

F

UEL

/W

ATER

S

EPARATOR

F

ILTER

There are two fuel filter assemblies. One is located

on the driver's side of the engine. The best access

to this water drain valve is from under the hood.

The second filter location is on the frame behind

the front axle. The best access to this water drain

valve is from under the vehicle.

If water is detected in the water separator while the

engine is running, or while the ignition switch is in

the ON position, the “Water In Fuel Indicator Light”

will illuminate and an audible chime will be heard

five times. At this point you should stop the engine

and drain the water from both of the filters.

If the “Water In Fuel Indicator Light” comes on and

a single chime is heard while you are driving, or

with the ignition switch in the ON position, there

may be a problem with your water separator wiring

or sensor. See an authorized dealer for service.
Upon proper draining of the water from both fuel

filters, the “Water In Fuel Indicator Light” will

remain illuminated for approximately 10 seconds.

If the water was drained while the engine was

running, the “Water In Fuel Indicator Light” may

remain on for approximately three minutes.
NOTE:

Care should be taken in disposing of used fluids

from your vehicle. Used fluids, indiscriminately

discarded, can present a problem to the envi

-

ronment. Contact an authorized dealer, service

station, or government agency for advice on recy

-

cling programs and for where used fluids and

filters can be properly disposed of in your area.
Drain the fuel/water separator filters when the

“Water In Fuel Indicator Light” is ON. Within

10 minutes of vehicle shutdown, turn the engine

mounted filter drain valve (located on the side of

the filter assembly) counterclockwise a quarter

turn, and turn the under body mounted filter drain

valve (located on the bottom of the filter assembly)

counterclockwise 1 full turn. Then turn the ignition

switch to the ON position, and allow any

accumulated water to drain. Leave the drain valve

open until all water and contaminants have been

removed. When clean fuel is visible, close the drain

valve following these guidelines:
1. Rotate the drain clockwise to close until you

feel resistance from the internal seal.

2. Continue turning the drain half of a turn to

properly compress the seal.

NOTE:

Over-compression of the seal due to over-tight

-

ening of the drain will damage the seal, cause a

leak, and require the entire sensor to be replaced.
3. Turn the ignition switch to OFF.

The sensor drain should not be over-tightened

during normal service operations to avoid internal

damage and future fuel leaks. The drain should be

closed and secured without the use of tools.
If more than a couple ounces/milliliters of fuel

have been drained, follow the directions for

“Priming If The Engine Has Run Out Of Fuel”

Ú

page 324.

CAUTION!



Do not drain the fuel/water separator filter

when the engine is running.



Diesel fuel will damage blacktop paving

surfaces. Drain the filter into an appropriate

container.

CAUTION!

If the “Water In Fuel Indicator Light” remains on,

DO NOT START the engine before you drain water

from the fuel filters to avoid engine damage.

SERVICING AND MAINTENANCE

323

E

NGINE

M

OUNTED

F

UEL

F

ILTER

R

EPLACEMENT

NOTE:



Using a fuel filter that does not meet the manu

-

facturer's filtration and water separating

requirements can severely impact fuel system

life and reliability.



The engine mounted filter housing is equipped

with a No-Filter-No-Run (NFNR) feature. Engine

will not run if:

a. No filter is installed.
b. Inferior/Non-approved filter is used. Use of

OEM filter is required to ensure vehicle will

run.

Engine Mounted Fuel Filter Assembly

1. Ensure engine is turned off.
2. Place drain pan under the fuel filter drain hose.
3. Open the water drain valve a quarter turn

counterclockwise and completely drain fuel

and water into the approved container.

4. Close the water drain valve.
5. Remove lid using a socket or strap wrench.

Rotate counterclockwise for removal. Remove

used o-ring and discard it.

6. Remove the used filter cartridge from the

housing and dispose of according to your local

regulations.

7. Wipe clean the sealing surfaces of the lid and

housing.

8. Install new o-ring back into ring groove on the

filter housing and lubricate with clean engine

oil.

9. Remove new filter cartridge from plastic bag

and install into housing.

NOTE:

Do not remove cartridge from bag until you reach

this step in order to keep cartridge clean.
10. Push down on the cartridge to ensure it is

properly seated. Do not pre-fill the filter

housing with fuel.

11. Install lid onto housing and tighten to 22.5 ft

lbs (30.5 N.m). Do not overtighten the lid.

12. Prime the engine

Ú

page 324. Then start the

engine and confirm there are no leaks.

U

NDERBODY

M

OUNTED

F

UEL

F

ILTER

R

EPLACEMENT

NOTE:



Using a fuel filter that does not meet the manu

-

facturer's filtration and water separating

requirements can severely impact fuel system

life and reliability.



The underbody mounted filter housing will

cause the engine not to run if:

a. No filter is installed.

1 — Drain Valve

CAUTION!



Diesel fuel will damage blacktop paving

surfaces. Drain the filter into an appropriate

container.



Do not prefill the fuel filter when installing a

new fuel filter. There is a possibility debris

could be introduced into the fuel filter during

this action. It is best to install the filter dry and

allow the in-tank lift pump to prime the fuel

system.

8

324

SERVICING AND MAINTENANCE

Underbody Mounted Fuel Filter Assembly

1. Ensure engine is turned off.
2. Place drain pan under the fuel filter drain hose.
3. Open the water drain valve one full turn

counterclockwise and completely drain fuel

and water into the approved container.

4. Close the water drain valve.
5. Remove lid using a socket or strap wrench.

Rotate counterclockwise for removal. Remove

used o-ring and discard it.

6. Remove the used filter cartridge from the

housing and dispose of according to your local

regulations.

7. Wipe clean the sealing surfaces of the lid and

housing.

8. Install new o-ring back into ring groove on the

filter housing and lubricate with clean engine

oil.

NOTE:

Water In Fuel (WIF) sensor is re-usable. Service kit

comes with new o-ring for filter canister and WIF

sensor.

P

RIMING

I

F

T

HE

E

NGINE

H

AS

R

UN

O

UT

O

F

F

UEL

1. Add a substantial amount of fuel to the tank,

approximately 2 to 5 gal (8L to 19L).

2. Three priming cycles must be completed. Turn

ignition to the RUN position and wait approxi

-

mately 30 seconds. This will activate the in tank

fuel pump. Turn the ignition switch to the off

position, and leave off for at least 30 seconds.

Repeat this procedure three times before

cranking the engine.

3. Start the engine using the “Normal Starting”

procedure

Ú

page 104.

4. Once the engine starts, allow the engine to idle

for a minimum of 30 seconds.

1 — Drain Valve

CAUTION!



Diesel fuel will damage blacktop paving

surfaces. Drain the filter into an appropriate

container.



Do not prefill the fuel filter when installing a

new fuel filter. There is a possibility debris

could be introduced into the fuel filter during

this action. It is best to install the filter dry and

allow the in-tank lift pump to prime the fuel

system.

WARNING!

Do not open the high pressure fuel system with

the engine running. Engine operation causes

high fuel pressure. High pressure fuel spray can

cause serious injury or death.

SERVICING AND MAINTENANCE

325

NOTE:

The engine may run rough until the air is forced

from all the fuel lines.

NOTE:



A maximum blend of 5% biodiesel, meeting

ASTM specification D-975 may be used with

your Cummins® diesel engine. (Chassis Cab

models not configured with B20 capability.)



A maximum blend of 20% biodiesel, meeting

ASTM specification D-7467 may be used with

your Cummins® diesel engine. (Chassis Cab

models configured with B20 capability.)



Use of biodiesel mixture in excess of 20% can

negatively impact the fuel filter's ability to sepa

-

rate water from the fuel, resulting in high pres

-

sure fuel system corrosion or damage.



Ethanol blends are not recommended or

approved for use with your Cummins® diesel

engine.



In addition, commercially available fuel addi

-

tives are not necessary for the proper operation

of your Cummins® diesel engine.

I

NTERVENTION

R

EGENERATION

S

TRATEGY

— M

ESSAGE

P

ROCESS

F

LOW

The Cummins® diesel engine meets all

Environmental Protection Agency (EPA) Heavy Duty

Diesel Engine Emissions Standards, resulting in

one of the lowest emitting diesel engines ever

produced.
To achieve these emissions standards, your

vehicle is equipped with a state-of-the-art engine

and exhaust system. The engine and exhaust

after-treatment system work together to achieve

the EPA Heavy Duty Diesel Engine Emissions

Standards. These systems are seamlessly

integrated into your vehicle and managed by the

Cummins® Powertrain Control Module (PCM). The

PCM manages engine combustion to allow the

exhaust system’s catalyst to trap and burn

Particulate Matter (PM) pollutants, with no input or

interaction on your part.
If the engine is allowed to idle or the truck is driven

on low engine speed drive cycles for more than two

hours, the system will automatically enter an

emissions operating mode that will increase the

engine idle speed to 900 RPM (1,050 RPM for

Chassis Cab). While in this mode, which is

designed to help maintain the Diesel Particulate

Filter, the engine idle speed will return to normal

when the brake pedal is applied. A small change in

engine tone or a slight change in engine

performance while accelerating may also be

noticeable at speeds below 20 mph (32 km/h).

This operating mode may last for up to an hour of

idle time, or around 20 minutes of driving time.
Additionally, your vehicle has the ability to alert you

to additional maintenance required on your truck

or engine

Ú

page 78.

CAUTION!

Do not engage the starter motor for more than

15 seconds at a time. Allow two minutes

between the cranking intervals.

WARNING!

Do not use alcohol or gasoline as a fuel blending

agent. They can be unstable under certain

conditions and be hazardous or explosive when

mixed with diesel fuel.

CAUTION!

Due to lack of lubricants in alcohol or gasoline,

the use of these fuels can cause damage to the

fuel system.

WARNING!

A hot exhaust system can start a fire if you park

over materials that can burn. Such materials

might be grass or leaves coming into contact

with your exhaust system. Do not park or oper

-

ate your vehicle in areas where your exhaust sys

-

tem can contact anything that can burn.

8

326

SERVICING AND MAINTENANCE

D

IESEL

E

XHAUST

F

LUID

Diesel Exhaust Fluid (DEF) sometimes known

simply by the name of its active component,

UREA—is a key component of Selective Catalytic

Reduction (SCR) systems, which help diesel

vehicles meet stringent emission regulations. DEF

is a liquid reducing agent that reacts with engine

exhaust in the presence of a catalyst to convert

smog-forming nitrogen oxides (NOx) into harmless

nitrogen and water vapor

Ú

page 379.

You can receive assistance in locating DEF in the

United States by calling 866-RAM-INFO

(866-726-4636). In Canada call

1–800–465–2001 (English) or

1–800–387–9983 (French)

B

ODY

L

UBRICATION

Locks and all body pivot points, including such

items as seat tracks, door hinge pivot points and

rollers, liftgate, tailgate, decklid, sliding doors and

hood hinges, should be lubricated periodically with

a lithium-based grease, such as Mopar Spray

White Lube to ensure quiet, easy operation and to

protect against rust and wear. Prior to the

application of any lubricant, the parts concerned

should be wiped clean to remove dust and grit;

after lubricating excess, oil and grease should be

removed. Particular attention should also be given

to hood latching components to ensure proper

function. When performing other underhood

services, the hood latch, release mechanism and

safety catch should be cleaned and lubricated.
The external lock cylinders should be lubricated

twice a year, preferably in the Autumn and Spring.

Apply a small amount of a high quality lubricant,

such as Mopar Lock Cylinder Lubricant directly into

the lock cylinder.

W

INDSHIELD

W

IPER

B

LADES

Clean the rubber edges of the wiper blades and the

windshield periodically with a sponge or soft cloth

and a mild nonabrasive cleaner. This will remove

accumulations of salt or road film.
Operation of the wipers on dry glass for long

periods may cause deterioration of the wiper

blades. Always use washer fluid when using the

wipers to remove salt or dirt from a dry windshield.
Avoid using the wiper blades to remove frost or ice

from the windshield. Keep the blade rubber out of

contact with petroleum products such as engine

oil, gasoline, etc.

NOTE:

Life expectancy of wiper blades varies depending

on geographical area and frequency of use. Poor

performance of blades may be present with chat

-

tering, marks, water lines or wet spots. If any of

these conditions are present, clean the wiper

blades or replace as necessary.
The wiper blades and wiper arms should be

inspected periodically, not just when wiper

performance problems are experienced. This

inspection should include the following points:



Wear or uneven edges



Foreign material



Hardening or cracking



Deformation or fatigue

If a wiper blade or wiper arm is damaged, replace

the affected wiper arm or blade with a new unit. Do

not attempt to repair a wiper arm or blade that is

damaged.

SERVICING AND MAINTENANCE

327

Wiper Blade Removal/Installation

1. Lift the wiper arm to raise the wiper blade off

of the glass, until the wiper arm is in the full

up position.

Windshield Wiper Arm And Blade

2. To disengage the wiper blade from the wiper

arm, flip up the locking tab.

Wiper Locking Assembly

3. Tilt the lower end of the wiper blade away from

the arm and with one finger push the release

tab toward the wiper arm.

Wiper Disengaging

4. Slide the wiper blade down towards the base

of the wiper arm.

CAUTION!

Do not allow the wiper arm to spring back

against the glass without the wiper blade in

place or the glass may be damaged.

1 — Wiper
2 — Locking Tab
3 — Wiper Arm

1 — Wiper
2 — Locking Tab

1 — Locking Tab
2 — Wiper
3 — Release Tab

8

328

SERVICING AND MAINTENANCE

(Continued)

5. With the wiper blade disengaged, remove the

wiper blade from the wiper arm by holding the

wiper arm with one hand and separating the

wiper blade from the wiper arm with the other

hand (move the wiper blade down toward the

base of the wiper arm and away from the J

hook in the end of the wiper arm).

Removing Wiper From Wiper Arm

6. Gently lower the wiper arm onto the glass.

Installing The Front Wipers
1. Lift the wiper arm off of the glass, until the

wiper arm is in the full up position.

2. Position the wiper blade under the hook on the

tip of the wiper arm with the wiper locking tab

open.

3. Insert the receiver bracket on the wiper

assembly into the hook on the tip of the arm

through the opening in the wiper blade under

the locking tab.

4. Slide the wiper blade up into the hook on the

wiper arm until it is latched (engagement will

be accompanied by an audible click). Fold

down the latch release tab and snap it into its

locked position.

5. Gently lower the wiper blade onto the glass.

E

XHAUST

S

YSTEM

The best protection against carbon monoxide entry

into the vehicle body is a properly maintained

engine exhaust system.
If you notice a change in the sound of the exhaust

system; or if the exhaust fumes can be detected

inside the vehicle; or when the underside or rear of

the vehicle is damaged; have an authorized

technician inspect the complete exhaust system

and adjacent body areas for broken, damaged,

deteriorated, or mispositioned parts. Open seams

or loose connections could permit exhaust fumes

to seep into the passenger compartment. In

addition, have the exhaust system inspected each

time the vehicle is raised for lubrication or oil

change. Replace as required.

1 — Wiper
2 — Locking Tab
3 — Wiper Arm J Hook

WARNING!



Exhaust gases can injure or kill. They contain

carbon monoxide (CO), which is colorless and

odorless. Breathing it can make you uncon

-

scious and can eventually poison you

Ú

page 284.



A hot exhaust system can start a fire if you

park over materials that can burn. Such mate

-

rials might be grass or leaves coming into

contact with your exhaust system. Do not park

or operate your vehicle in areas where your

exhaust system can contact anything that can

burn.

CAUTION!



The catalytic converter requires the use of

unleaded fuel only. Leaded gasoline will

destroy the effectiveness of the catalyst as an

emissions control device and may seriously

reduce engine performance and cause

serious damage to the engine.

SERVICING AND MAINTENANCE

329

(Continued)

Under normal operating conditions, the catalytic

converter will not require maintenance. However, it

is important to keep the engine properly tuned to

ensure proper catalyst operation and prevent

possible catalyst damage.
NOTE:

Intentional tampering with emissions control

systems can result in civil penalties being

assessed against you.
In unusual situations involving grossly

malfunctioning engine operation, a scorching odor

may suggest severe and abnormal catalyst

overheating. If this occurs, stop the vehicle, turn off

the engine and allow it to cool. Service, including a

tune-up to manufacturer's specifications, should

be obtained immediately.

To minimize the possibility of catalytic converter

damage:



Do not interrupt the ignition when the transmis

-

sion is in gear and the vehicle is in motion.



Do not try to start the vehicle by pushing or

towing the vehicle.



Do not idle the engine with any ignition compo

-

nents disconnected or removed, such as when

diagnostic testing, or for prolonged periods

during very rough idle or malfunctioning oper

-

ating conditions.

C

OOLING

S

YSTEM

Engine Coolant Checks

Check the engine coolant (antifreeze) protection

every 12 months (before the onset of freezing

weather, where applicable). If the engine coolant is

dirty or rusty in appearance, the system should be

drained, flushed and refilled with fresh coolant.

Check the front of the A/C condenser or radiator

for any accumulation of bugs, leaves, etc. If dirty,

clean by gently spraying water from a garden hose

vertically down the face of the A/C condenser or

the back of the radiator core.
Check the engine cooling system hoses for brittle

rubber, cracking, tears, cuts and tightness of the

connection at the coolant recovery bottle and

radiator. Inspect the entire system for leaks.
DO NOT REMOVE THE COOLANT PRESSURE CAP

WHEN THE COOLING SYSTEM IS HOT.



Damage to the catalytic converter can result if

your vehicle is not kept in proper operating

condition. In the event of engine malfunction,

particularly involving engine misfire or other

apparent loss of performance, have your

vehicle serviced promptly. Continued opera

-

tion of your vehicle with a severe malfunction

could cause the converter to overheat,

resulting in possible damage to the converter

and vehicle.

CAUTION!

WARNING!



You or others can be badly burned by hot

engine coolant (antifreeze) or steam from your

radiator. If you see or hear steam coming from

under the hood, do not open the hood until the

radiator has had time to cool. Never open a

cooling system pressure cap when the radi

-

ator or coolant bottle is hot.



Keep hands, tools, clothing, and jewelry away

from the radiator cooling fan when the hood is

raised. The fan starts automatically and may

start at any time, whether the engine is

running or not.



When working near the radiator cooling fan,

disconnect the fan motor lead or turn the igni

-

tion to the OFF mode. The fan is temperature

controlled and can start at any time the igni

-

tion is in the ON mode.

WARNING!

8