Page 249 of 3051
SBR229E
1. Loosen lock nut and adjust pedal free height by turning brake
booster input rod. Then tighten lock nut.
2. Check pedal free play.
Make sure that stop lamps go off when pedal is released.
3. Check brake pedal’s depressed height while engine is running.
If lower than specification, check brake system for leaks, accu-
mulation of air or any damage to components (master cylinder,
wheel cylinder, etc.), then make necessary repairs.
BRAKE PEDAL AND BRACKET
Adjustment (Cont’d)
BR-12
Page 250 of 3051
RemovalNLBR0117
NBR360
1. Reservoir cap
2. Filter
3. Reservoir tank
4. Adapter5. Elastic pin
6. Seal
7. Washer
8. Circlip9. Piston stopper pin
10. Primary piston assembly
11. Secondary piston assembly
12. Cylinder body
CAUTION:
Be careful not to splash brake fluid on painted areas; it may
cause paint damage. If brake fluid is splashed on painted
areas, wash it away with water immediately.
1. Connect a vinyl tube to air bleeder valve.
2. Drain brake fluid from each front caliper air bleeder valve,
depressing brake pedal to empty fluid from master cylinder.
3. Remove brake pipe flare nuts.
4. Disconnect hoses from adapter.
5. Remove master cylinder mounting nuts.
NBR361
DisassemblyNLBR01181. Drive out elastic pin from cylinder body.
2. Remove adapter, washer and seals.
MASTER CYLINDER
Removal
BR-13
Page 251 of 3051
NBR353
3. Remove the circlip with suitable pliers while piston is pushed
into cylinder.
SBR232E
4. Remove piston stopper pin while piston is pushed into cylinder.
5. Remove piston assemblies.
If it is difficult to remove secondary piston assembly,
gradually apply compressed air through fluid outlet.
InspectionNLBR0119Check for the following items.
Replace any part if damaged.
Master cylinder:
+Pin holes or scratches on inner wall.
Piston:
+Deformation or scratches on piston cups.
SBR233E
AssemblyNLBR01201. Insert secondary piston assembly. Then insert primary piston
assembly.
+Pay attention to alignment of secondary piston slit with
valve stopper mounting hole of cylinder body.
SBR232E
2. Install piston stopper pin while piston is pushed into cylinder.
Then secure the primary and secondary piston assemblies
with new circlip.
3. Insert washer and push reservoir seals and adapter into cylin-
der body.
4. Install elastic pin.
MASTER CYLINDER
Disassembly (Cont’d)
BR-14
Page 252 of 3051

InstallationNLBR0121CAUTION:
+Refill with new brake fluid“DOT 4”.
+Never reuse drained brake fluid.
1. Place master cylinder onto brake booster and secure mount-
ing nuts lightly.
2. Torque mounting nuts.
:13-15N·m (1.3 - 1.5 kg-m,9-11ft-lb)
NBR363
NBR364
3. Check hoses for damage. If the hoses show cracks or damage,
replace the hose.
4. Insert the dot (coloured) mark hoses to the primary - and sec-
ondary inlet ports adapter. Then secure it with clamps.
Hose marking
Booster model M215T S255
Primary-inlet port White dot Blue dot
Secondary-inlet port Yellow dot Green dot
NBR362
5. Fill up reservoir tank with new brake fluid.
6. Plug all ports on master cylinder with fingers to prevent air
suction while releasing brake pedal.
7. Have driver depress brake pedal slowly several times until no
air comes out of master cylinder.
8. Fit brake lines to master cylinder.
9. Tighten flare nuts.
:15-18N·m (1.5 - 1.8 kg-m, 11 - 13 ft-lb)
10. Bleed air procedure from brake and clutch system. Refer to
“Bleeding Brake System”, BR-8 and“Air Bleeding Procedure”,
CL-10.
MASTER CYLINDER
Installation
BR-15
Page 253 of 3051

SBR002A
On-vehicle ServiceNLBR0023OPERATING CHECKNLBR0023S011. Stop engine and depress brake pedal several times. Check
that pedal stroke does not change.
2. Depress brake pedal, then start engine. If pedal goes down
slightly, operation is normal.
SBR365AA
AIRTIGHT CHECKNLBR0023S021. Start engine, and stop it after one or two minutes. Depress
brake pedal several times slowly. The pedal should go further
down at the first time, and then it should gradually rise there-
after.
2. Depress brake pedal while engine is running, and stop engine
with pedal depressed. The pedal stroke should not change
after holding pedal down for30 seconds.
SBR232CB
RemovalNLBR0024CAUTION:
+Be careful not to splash brake fluid on painted areas; it
may cause paint damage. If brake fluid is splashed on
painted areas, wash it away with water immediately.
+Be careful not to deform or bend brake pipes, during
booster removal.
SBR208E
InspectionNLBR0025OUTPUT ROD LENGTH CHECKNLBR0025S011. Apply vacuum of 66.7 kPa ( 667 mbar, 500 mmHg, 19.69
inHg) to brake booster with a handy vacuum pump.
2. Add preload of 19.6 N (2 kg, 4.4 lb) to output rod.
3. Check output rod length.
Specified length:
10.275 - 10.525 mm (0.4045 - 0.4144 in)
BRAKE BOOSTER
On-vehicle Service
BR-16
Page 254 of 3051
InstallationNLBR0026CAUTION:
+Be careful not to deform or bend brake pipes, during
booster installation.
+Replace clevis pin if damaged.
+Refill with new brake fluid“DOT 4”.
+Never reuse drained brake fluid.
+Take care not to damage brake booster mounting bolt
thread during installation. Due to the acute angle of
installation, the threads can be damaged with the dash
panel.
SBR237EA
1. Before fitting booster, temporarily adjust clevis to dimension
shown.
2. Fit booster, then secure mounting nuts (brake pedal bracket to
master cylinder) lightly.
3. Connect brake pedal and booster input rod with clevis pin.
4. Secure mounting nuts.
Specification:
13-16N·m (1.3 - 1.6 kg-m,9-12ft-lb)
5. Install master cylinder. Refer to“Installation”in“MASTER
CYLINDER”, BR-15.
6. Bleed air. Refer to“Bleeding Brake System”, BR-8 and“Air
Bleeding Procedure”, CL-10.
BRAKE BOOSTER
Installation
BR-17
Page 255 of 3051
SBR225B
Removal and InstallationNLBR0027CAUTION:
When installing vacuum hoses, pay attention to the following
points.
+Do not apply any oil or lubricants to vacuum hose and
check valve.
+Insert vacuum tube into vacuum hose as shown.
SBR498A
NBR385
+Install check valve, paying attention to its direction.
VACUUM HOSE
Removal and Installation
BR-18
Page 256 of 3051
Inspection=NLBR0028HOSES AND CONNECTORSNLBR0028S01Check vacuum lines, connections and check valve for airtightness,
improper attachment chafing and deterioration.
SBR844B
CHECK VALVENLBR0028S02Check vacuum with a vacuum pump.
Connect to booster side Vacuum should exist.
Connect to engine side Vacuum should not exist.
SBR943A
VACUUM HOSE
Inspection
BR-19