Freightliner FLA/FLB/FLC/FLD/FLL. Manual — part 26
Meritor Drive Axle Recommended Lubricant
Recommended
Lubricant Type
Ambient Temperature
Lubricant SAE
Viscosity Grade
Meritor
Specification
Hypoid Gear Oil
API Service
Classification GL–5
+10°F (–12.2°C) and up
*
85W–140
0–76–A
–15°F (–26.1°C) and up
*
80W–140
0–76–B
–15°F (–26.1°C) and up
*
80W–90
0–76–D
–40°F (–40°C) and up
*
75W–90
0–76–E
–40°F (–40°C) to +35°F (+2°C)
75W
0–76–J
–40°F (–40°C) and up
*
75W–140
0–76–L
Synthetic Gear Oil
–40°F (–40°C) and up
*
75W–90
0–76–N
–40°F (–40°C) and up
*
75W–140
0–76–M
*
There is no upper limit on these ambient temperatures, but axle sump temperature must never exceed 250°F (121°C).
Table 2, Meritor Drive Axle Recommended Lubricant
4.
Install and tighten the fill plug 35 lbf·ft (47 N·m).
NOTE: When adding to or checking the oil level
of non-drive axles, make certain the hub cap
and plug are cleaned before removal of the
plug; this will minimize the possibility of dirt and
road grime entering the assembly.
5.
On non-drive axles using oil-lubricated wheel
bearings, check oil level at the wheels, and add
oil if low. Use the same lubricant as specified for
the drive axle.
Meritor Axle Breather Checking
Axle housing breathers (
) must remain clean.
Whenever the axle lubricant level is checked, check
the axle breather to be sure it is open. Check more
often under adverse operating conditions. If the
breather is plugged, clean or replace it as needed.
35–02 Axle Lubricant
Changing, Oil Filter
Replacing, and Magnetic
Strainer Cleaning
Eaton Axle Lubricant Changing
and Magnetic Strainer Cleaner
CAUTION
Failure to change the axle lubricant at more fre-
quent intervals, when adverse operating condi-
tions require, could result in axle damage.
Draining is best accomplished immediately after the
vehicle has completed a trip. The lubricant is warm
then and will run freely, allowing full drainage in mini-
mum time. This is especially desirable in cold
weather.
1.
With the vehicle parked on level ground, apply
the parking brakes, and chock the tires.
06/07/94
f350062a
1
2
3
1.
Axle Housing
Breathers
2.
Carrier Oil Fill Plugs
3.
Interaxle Differential
Fig. 4, Fill Plug and Axle Housing Breather Locations
Rear Axle
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Heavy-Duty Trucks Maintenance Manual, January 1997
35/3
2.
Clean the fill plug and area surrounding it, then
remove the plug from the oil fill hole (or stand-
pipe if installed in the oil fill hole) located in the
axle housing rear cover. See
3.
Remove the drain plug at the bottom of the axle
housing (
) and allow sufficient time for all
old lubricant to run out.
4.
On tandem drive axles, also remove the plug at
the bottom of the power divider to drain oil from
the power divider.
NOTE: Some tandem drive axles are equipped
with a cylindrical magnetic strainer, below the
lube pump on the front of the power divider
cover, that must be removed and cleaned at
each axle oil change. See
5.
Remove and clean the magnetic strainer, if so
equipped.
5.1
Remove the magnetic strainer from the
power divider cover.
WARNING
Always wear eye protection when using com-
pressed air to clean parts, as flying debris could
cause permanent damage to unprotected eyes. Do
not point the air stream in the direction of other
persons.
5.2
Wash the strainer in solvent, and blow it
dry with compressed air to remove oil and
metal particles.
5.3
Install and tighten the magnetic strainer
40 to 60 lbf·ft (54 to 81 N·m).
6.
Clean the fill and drain plugs. To facilitate clean-
ing of magnetic plugs, a piece of key stock or
any other convenient steel slug may be used to
short the two magnetic poles and divert the mag-
netic field.
IMPORTANT: Magnets will rapidly lose effective-
ness as collected material bridges the gap be-
tween the two poles. Clean or change the plugs
before this occurs. It may be necessary to clean
or change the plugs one or more times between
lubrication change intervals.
7.
After cleaning, install and tighten the drain
plug(s) 40 to 60 lbf·ft (54 to 81 N·m).
8.
Fill the axle with the recommended lubricant.
See
for recommended drive axle lubri-
cants, and
or
for drive axle lubri-
cant capacities.
f350018a
05/27/93
1
2
1.
Oil Fill Plug
2.
Drain Plug
Fig. 5, Axle Housing Drain and Fill Plugs
f350017a
1
2
05/27/93
1.
Magnetic Strainer
2.
Power Divider
Fig. 6, Eaton Tandem-Drive-Axle Magnetic Strainer
Rear Axle
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Heavy-Duty Trucks Maintenance Manual, January 1997
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Eaton Single Drive Axle Lubricant Capacities
Axle Type
Axle Model
Capacity
*
:
pints (liters)
Single Reduction
23085S, 23085D
40 (18.9)
23105S, 23105D
48 (22.7)
23121
41 (19.4)
30105S
46 (21.8)
Double Reduction
35055P
36 (17.0)
*
Quantities listed are approximate. Fill axle until lubricant is level with bot-
tom of fill hole with vehicle on level ground.
Table 3, Eaton Single Drive Axle Lubricant Capacities
NOTE: Some Eaton axles have a small
tapped and plugged hole near and below the
housing oil fill hole. See
. This smaller
hole is for a lubricant temperature indicator
only, and should not be used as a fill or level
hole.
8.1
Using recommended lubricant, fill the axle
through the oil fill hole or standpipe open-
ing. Lubricant should be level with the
bottom of the oil fill hole (
) or top of
the standpipe opening.
8.2
Install and tighten the fill plug 40 to 60
lbf·ft (54 to 81 N·m).
8.3
For forward drive axles, remove the
power divider fill plug, located slightly off-
set to the right in the top portion of the
forward differential carrier. See
Add two pints (1 L) of lubricant through
this fill hole. Do not use the hole at the
top
of the differential carrier as a fill hole.
Install and tighten the fill plug 40 to 60
lbf·ft (54 to 81 N·m).
Eaton Two-Speed Axle Shift Unit
Oil Changing
1.
Remove the shift unit housing cover (
Drain and discard the old lubricant. Discard the
housing cover gasket.
2.
Thoroughly wash the axle shift parts and housing
cover, and allow them to air dry.
3.
Install the housing cover and a new cover gas-
ket. Tighten the housing cover capscrews 90 to
110 lbf·in (1020 to 1240 N·cm), then remove the
oil fill plug from the cover.
IMPORTANT: When vehicle operating tempera-
tures are above 0°F (–18°C), use SAE 10
heavy-duty engine oil, API service classification
SD (sulfated ash content must not exceed
1.85%). When vehicle operating temperatures
are below 0°F (–18°C), use one part kerosene
to three parts SAE 10 heavy-duty engine oil,
API service classification SD (sulfated ash con-
tent must not exceed 1.85%). This cold-weather
mixture can be safely used up to 32°F (0°C).
Commercially available automatic transmission
fluid may be used in place of SAE 10 engine oil.
Automatic transmission fluid can be used for all
temperatures; do not mix kerosene with it. To
prevent component damage, do not mix engine
oil and automatic transmission fluid.
4.
Fill the shift unit housing through the oil fill hole
until specified lubricant is level with the bottom of
the opening.
5.
Apply a small amount of Loctite
®
242, or equiva-
lent sealant, to the threads of the fill plug. Install
the plug finger-tight; then, using a wrench,
tighten it 1-1/2 turns past finger-tight.
f350019a
1
05/27/93
2
3
1.
Fill Plug
2.
Power Divider
3.
Forward Differential
Carrier
Fig. 7, Power Divider Fill Plug
Rear Axle
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Heavy-Duty Trucks Maintenance Manual, January 1997
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Eaton Tandem Drive Axle Lubricant Capacities
Axle Type
Axle Model
Capacity
*
:
pints (liters)
Axle Type
Axle Model
Capacity
*
:
pints (liters)
Single
Reduction
DS341
39 (18.5)
†
Dual Range
(2-Speed)
DT401, 401–P
39 (18.5)
†
RS341
36 (17)
RT401
36 (17)
DS381, 381–P
39 (18.5)
†
DT402, 402–P
34 (16.1)
†
RS381
36 (17)
RT–402
34 (16.1)
DS401, 401–P
39 (18.5)
†
DT451, DT451–P
39 (18.5)
†
RS401
36 (17)
RT451
34 (16.1)
DS402, 402–P
39 (18.5)
†
DT461–P
43 (20.3)
†
RS402
36 (17)
RT461
40 (18.9)
DS404
39 (18.5)
†
Double
Reduction
DP451–P
34 (16.1)
†
RS404
36 (17)
RP451
34 (16.1)
DS451, 451–P
39 (18.5)
†
DP461–P
43 (20.3)
†
RS451
36 (17)
RP461
40 (18.9)
DS460–P
44 (20.8)
†
DP521–P
42 (19.9)
†
RS460
40 (18.9)
RP521
39 (18.5)
DS461–P
43 (20.3)
†
DP601–P
42 (19.9)
†
RS461
40 (18.9)
RP601
39 (18.5)
DS581–P
42 (19.9)
†
DP651–P
41 (19.4)
†
RS581
39 (18.5)
RP651
37 (17.5)
*
Quantities listed are approximate. Fill axle until lubricant is level with bottom of fill hole with vehicle on level ground.
†
Add 2 pints (1 L) of additional lubricant to the power divider.
Table 4, Eaton Tandem Drive Axle Lubricant Capacities
Meritor Axle Lubricant Changing
and Oil Filter Replacing
Axle Lubricant Change-Interval
Information
A regular schedule for changing axle lubricant in a
particular vehicle and operation can be accurately
determined by analysis of oil samples taken from the
assembly at specific intervals or mileages. The final
schedule recommended may, for economic reasons,
be correlated with lubricant changes governed by
climatic conditions and magnetic plug maintenance.
Lubricant changes should be made as climatic tem-
peratures demand, regardless of vehicle mileage or
established change schedule.
Normal operating temperature of compounded lubri-
cants during the summer season is approximately
160 to 220°F (71 to 104°C). Chemicals and additives
that give these lubricants increased load-carrying ca-
pacity, oxidize faster at temperatures above 220°F
(104°C), contributing to more rapid lubricant deterio-
ration. For this reason, lubricants of this type, that
operate continuously at high temperatures, must be
changed more frequently to realize the inherent ad-
vantages they offer.
CAUTION
Failure to change the axle lubricant at more fre-
quent intervals, when adverse operating condi-
tions require, could result in axle damage.
Traction Equalizer Additives
Single drive axles equipped with traction equalizers
may require a "limited-slip friction modifier" to correct
a slip-stick condition, as described in the vehicle driv-
Rear Axle
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Heavy-Duty Trucks Maintenance Manual, January 1997
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