Mitsubishi Montero (1991+). Manual — part 53

length. If spring length is not 6.97-7.09 in. (177-180 mm), adjust

cable or support until correct length is obtained. See Fig. 1.

Fig. 1: Testing LSPV Spring Length (Pickup & Ram-50)

Courtesy of Mitsubishi Motor Sales of America.

MASTER CYLINDER PUSH ROD

Check and adjust clearance between back of master cylinder

piston and power brake push rod. See PUSH ROD CLEARANCE SPECIFICATIONS

table. See Fig. 2. After adjusting push rod clearance, adjust pedal

height, and bleed brake system.

Fig. 2: Adjusting Push Rod Clearance

Courtesy of Mitsubishi Motor Sales of America.

PUSH ROD CLEARANCE SPECIFICATIONS TABLE

Application In. (mm)

Montero . . . . . . . .. .004-.020 (0.1-0.5)

Pickup & Ram-50 . . . . . . .028-.043 (0.7-1.09)

PARKING/EMERGENCY BRAKE

NOTE: Adjust service brake before adjusting parking brake.

Montero

1) Start engine, and apply brake pedal. Pull parking brake

lever with a force of 44-45 lbs. (20.0-20.4 kg). Parking brake lever

should move up 4-6 notches.

2) If necessary, turn adjusting cable nut located under

console or at end of cable rod. See Fig. 3.

Fig. 3: Adjusting Parking/Emergency Brake (Typical)

Courtesy of Mitsubishi Motor Sales of America.

Pickup & Ram-50

Fully release parking brake, and allow slack in rear cable to

prevent brake shoe drag. Adjust turnbuckle for 2WD models (turn

adjusting nut on equalizer for 4WD models) to obtain a brake lever

stroke of 16-17 notches with a force of 66 lbs. (29.9 kg). Ensure

equalizer is at right angle to joint.

REAR DRUM BRAKE SHOES

Set adjustment assembly so brake shoes outside diameter is 9.

97-9.98 in. (253.2-253.5 mm). After brake drum installation, depress

brake pedal to center shoes, and check pedal travel. Rotate brake drum

to verify free movement.

STOPLIGHT SWITCH

Loosen lock nut, and adjust switch-to-pedal arm clearance to

.02-.04" (.5-1.0 mm). Tighten lock nut. DO NOT depress master cylinder

push rod during stoplight switch adjustment.

TESTING

POWER BRAKE UNIT

Check Valve Inspection

Remove vacuum hose from power brake unit. Remove check valve

from hose (if possible). Using a vacuum pump, ensure airflow is in

direction of intake manifold only.

System Check

1) Run engine for 2 minutes, and shut it off. Depress brake

pedal several times with normal pressure. If pedal height gradually

becomes higher with successive applications, power brake unit is okay.

If pedal height remains steady, power brake unit is faulty.

2) With engine stopped, depress brake pedal repeatedly until

it’s height no longer falls. Hold brake pedal down, and start engine.

If pedal moves downward slightly, power brake unit is okay. If pedal

height does not change, power brake unit is faulty.

3) With engine running, press and hold brake pedal and shut

off engine. Hold brake pedal for 30 seconds. Brake pedal height should

not change. If pedal height falls, power brake unit is faulty.

LOAD-SENSING PROPORTIONING VALVE (LSPV) (PICKUP & RAM-50)

1) Before diagnosing Load-Sensing Proportioning Valve (LSPV),

ensure all other brake components are operating properly. When all

other brake system components are determined to be okay, perform LSPV

test beginning with next step.

2) Ensure unladen vehicle is on level ground. Ensure lever is

not contacting stopper bolt. See Fig. 1.

3) When lever is pushed toward valve, distance from LSPV

lever hole and support hole must be 6.97-7.09 in. (177-180 mm). If

measured distance is not within specification, loosen support bolt.

Adjust support until measured distance is within specification.

4) After measured distance is within specification, connect

pressure gauges to input and output ports of LSPV. See Fig. 4. Bleed

brake system. See BLEEDING BRAKE SYSTEM.

Fig. 4: Connecting Pressure Gauges to LSPV (Pickup & Ram-50)

Courtesy of Mitsubishi Motor Sales of America.

5) Remove the LSPV load-sensing spring. Slowly depress the

brake pedal. Check the readings on the pressure gauges. Refer to the

LSPV PRESSURE SPECIFICATIONS table.

6) Install LSPV load-sensing spring. Load weight into rear of

vehicle until measured spring length distance is 7.0" (178 mm) with

lever slightly pressed in. See Fig. 1.

7) Slowly depress brake pedal. Check readings on pressure

gauges. See LSPV PRESSURE SPECIFICATIONS table. If fluid pressure is

not within specification, ensure all other brake system components are

okay. If other components are okay, replace LSPV assembly.

LSPV PRESSURE SPECIFICATIONS (PICKUP & RAM-50)

Application Inlet Pressure Outlet Pressure

psi (kg/cm

) psi (kg/cm

)

Load-Sensing Spring

Removed . . ... 853 (60) . . . 242-327 (17-23)

Installed . . 1991 (140) . (1) 299-583 (21-40)

(1) - On vehicles with 2WD and heavy-duty suspension,

outlet pressure is 526-697 psi (37-49 kg/cm

).

PROPORTIONING VALVE (NON-LOAD-SENSING) (MONTERO)

Pressure Test

1) Connect pressure gauges to input and output ports of the

proportioning valve. See Fig. 5. Bleed brake hydraulic system. Refer

to BLEEDING BRAKE SYSTEM.

2) Slowly depress brake pedal. Check readings on pressure

gauges. See the PROPORTIONING VALVE PRESSURE SPECIFICATIONS table. If

fluid pressures are not within specification, replace proportioning

valve.

Fig. 5: Connecting Pressure Gauges to Proportioning Valve (Typical)

Courtesy of Mitsubishi Motor Sales of America.

PROPORTIONING VALVE PRESSURE SPECIFICATIONS (MONTERO)