Nissan Frontier D22. Instruction — part 163
BRAKE BOOSTER
BR-19
C
D
E
G
H
I
J
K
L
M
A
B
BR
BRAKE BOOSTER
PFP:47200
On-vehicle Service
EFS003FN
OPERATING CHECK
●
Depress brake pedal several times with engine off. After
exhausting vacuum, make sure there is no change in pedal
stroke.
●
Depress brake pedal, then start engine. If pedal goes down
slightly, operation is normal.
AIRTIGHT CHECK
●
Start engine, and stop it after one or two minutes. Depress brake pedal several times slowly. Booster is
airtight if pedal stroke is less each time.
●
Depress brake pedal while engine is running, and stop engine with pedal depressed. The pedal stroke
should not change after holding pedal down for 30 seconds.
Removal and Installation
EFS003FO
REMOVAL
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.
●
Be careful not to deform or bend brake pipes during
removal of booster.
SBR002A
SBR365AA
LBR124
BR-20
BRAKE BOOSTER
INSPECTION AFTER REMOVAL
1.
Apply vacuum of
−66.7 kPa (−500 mmHg, −19.69 inHg) to brake
booster with a hand vacuum pump.
2.
Add preload of 19.6 N (2.0 kg, 4.4 lb) to output rod length.
3.
Check output rod length.
INSTALLATION
CAUTION:
●
Be careful not to deform or bend brake pipes during instal-
lation of booster.
●
Replace clevis pin if damaged.
●
Refill with new brake fluid “DOT 3”.
●
Never reuse drained brake fluid.
●
Take care not to damage brake booster mounting bolt
thread when installing. Due to the narrow angle of installa-
tion, the threads can be damaged by the dash panel.
1.
Before fitting booster, temporarily adjust clevis to dimension shown.
2.
Fit booster, then secure mounting nuts (brake pedal bracket to brake booster) lightly.
3.
Connect brake pedal and booster input rod with clevis pin.
4.
Secure brake booster nuts.
5.
Install master cylinder. Refer to
.
6.
Adjust brake pedal height and free play. Refer to
.
7.
Secure lock nut for clevis.
8.
Bleed air. Refer to
BR-10, "Bleeding Brake System"
.
Output
rod length
: 10.275 - 10.525 mm (0.4045 - 0.4144 in)
ABR875
A
KA24DE
: 160 mm (6.30 in)
VG33E and VG33ER
: 165 mm (6.50 in)
Brake booster nuts
: 13 - 16 N·m (1.3 - 1.6 kg-m, 9 - 12 ft-lb)
Lock nut
: 16 - 22 N·m (1.6 - 2.2 kg-m, 12 - 16 ft-lb)
SBR116BE
SBR930
VACUUM LINES
BR-21
C
D
E
G
H
I
J
K
L
M
A
B
BR
VACUUM LINES
PFP:41920
Removal and Installation
EFS003FP
CAUTION:
When installing vacuum hoses, pay attention to the following points.
●
Do not apply any oil or lubricants to vacuum hose with
check valve.
●
Insert vacuum tube into vacuum hose as shown.
●
Install vacuum hose with internal check valve, paying atten-
tion to its direction.
LBR159
SBR225B
BR-22
VACUUM LINES
Inspection
EFS003FQ
VISUAL INSPECTION
Check vacuum lines and connections for airtightness, improper attachment, chafing and deterioration.
CHECK VALVE INSPECTION
Check vacuum with a vacuum pump.
Connect to booster side
Vacuum should exist.
Connect to engine side
Vacuum should not exist.
SBR844B
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