Mitsubishi Montero (1998+). Manual - part 55

BRAKE SYSTEM 

1998 Mitsubishi Montero

         1997-98 BRAKES

         Mitsubishi  - Disc & Drum

         Diamante, Eclipse, Galant, Mirage, Montero, Montero Sport,

         3000GT

         INTRODUCTION

         This article contains information on repair and service of

basic hydraulic brake system. If vehicle is equipped with anti-lock

brakes, also see appropriate ANTI-LOCK article.

         DESCRIPTION

         Brake system consists of a master cylinder, vacuum power

brake booster, proportioning valve and self-adjusting assembly.

Montero has a Load-Sensing Proportioning Valve (LSPV). All models are

equipped with front disc brakes and either rear disc or drum brakes.

Parking brake assembly activates rear brakes.

         BLEEDING BRAKE SYSTEM

         BLEEDING PROCEDURES

         Bleed brakes whenever hydraulic lines are opened or pedal

feels spongy. Bleed system in appropriate sequence. See

BRAKE LINE BLEEDING SEQUENCE table. Use only DOT 3 or DOT 4 approved

fluid and DO NOT mix fluid types.

BRAKE LINE BLEEDING SEQUENCE

Application                                                   Sequence

Diamante, Eclipse, Galant,

 Mirage & 3000GT  ....................................  RR, LF, LR, RF

Montero  .......................................  RR, LR, LSPV, RF, LF

Montero Sport  .......................................  RR, LR, RF, LF

         ADJUSTMENTS

         BRAKE PEDAL HEIGHT, FREE PLAY & CLEARANCE

         1) To measure brake pedal height, pull up carpet under brake

pedal. Measure distance between floor board and middle of brake pedal

pad surface with brake pedal released. See BRAKE PEDAL HEIGHT

SPECIFICATIONS table.

         2) To adjust pedal height, separate connector from stoplight

switch, and loosen switch lock nut. Back-off switch so it does not

contact brake pedal arm. Loosen master cylinder push rod lock nut.

Adjust brake pedal height by rotating master cylinder push rod until

brake pedal height is within specification.

BRAKE PEDAL HEIGHT SPECIFICATIONS

Application                                     Pedal Height: In. (mm)

Diamante, Eclipse,

 Montero Sport & Galant  ..........................  6.9-7.1 (175-181)

Mirage  ...........................................  6.4-6.6 (164-167)

Montero  ..........................................  7.3-7.5 (186-191)

3000GT  ...........................................  7.0-7.2 (177-182)

         3) Tighten lock nut, and ensure brake pedal height is within

specification. Start engine to evacuate brake booster chamber. Stop

engine, and apply brake several times to remove vacuum from brake

booster.

         4) Using hand pressure, depress brake pedal to measure free

play before resistance is felt. Free play distance for all models is

0.10-0.31" (3-8 mm). If distance is not within specification, it is

probably caused by excessive play between the brake pedal arm and the

clevis pin. Check and replace as necessary.

         5) Start engine and apply 110 lbs. (490 N) of pressure to

brake pedal. With the carpet pulled back, measure the distance between

the brake pedal and the floorboard. If the distance is not 3.1-3.5"

(80-90 mm) check for air in brake hydraulic system, brake adjustment

or defective parking brake component or adjustment. Adjust or repair

as necessary.

         LOAD-SENSING PROPORTIONING VALVE (LSPV)

         Montero

         1) Park vehicle on level surface. Remove excess weight from

vehicle. Make sure the lever is all the way towards the valve side.

Measure length of entire spring. See Fig. 1.

         If spring length is not within specification, adjust spring

support until correct length is obtained. See LSPV SPRING LENGTH

table.

Fig. 1:  Adjusting Load-Sensing Proportioning Valve Spring (Montero)

Courtesy of Mitsubishi Motor Sales of America.

         BRAKE BOOSTER PUSH ROD

         Adjustment (Except Diamante)

         1) Place the Push Rod Adjusting Gauge (MB991714) in the

master cylinder, position gauge shaft so it contacts master cylinder

piston and tighten wing bolt.

         2) Apply a vacuum of 9.7 psi (-66.7 kPa) for Eclipse, Galant,

Montero and 3000GT and 19.6 psi (-66.7 kPa) for Mirage and Montero

Sport to the brake booster using a hand held vacuum pump.

         3) Rotate the gauge tool so it is positioned offset from

center of the brake booster. See Fig. 2.

Fig. 2:  Push Rod Adjusting Gauge Setup.

Courtesy of Mitshbishi Motor Sales of America.

         4) Move the gauge tool towards the center so the shaft

contacts the end of the brake booster push rod. If contact is not as

shown in position "A", shorten the rod if position "B" is present, or

lengthening it if position "C" is present. See  Fig. 3.