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Page Title:
ADJUSTMENT OF ACCUMULATOR CHARGING PRESSURE |
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 TM 10-3930-660-24-1
BRAKE CONTROL VALVE MAINTENANCE - CONTINUED
0131 00
ADJUSTMENT OF ACCUMULATOR CHARGING PRESSURE
NOTE
The accumulator charging pressure is adjusted at the brake control valve.
1.
Pump the brake pedal to relieve pressure in accumulator (24).
2.
With the engine stopped, pump brake pedal until no power assistance is felt. This will require approximately 20 brake
pedal depressions.
3.
Disconnect hose (7) and elbow (8) at service brake control valve (6).
4.
Install pressure gauge to accumulator port (A) on service brake control valve (6).
NOTE
Note pressure gauge reading when click is heard in step 5.
5.
Start engine and listen for click caused by shifting of
accumulator charging valve inside service brake con-
trol valve (6).
6.
If necessary, adjust accumulator charging pressure.
24
7.
If pressure is less than 1,700-1,800 psi (11721-12411
B
kPa) at time the click is heard, turn adjusting plug (B)
on valve (6) clockwise until pressure is within specifi-
cations.
8.
If pressure is greater than 1,700-1,800 psi (11721-
6
12411 kPa) at time click is heard, turn adjusting plug
A
(B) on valve (6) counterclockwise until pressure is
8
within specifications.
7
9.
Remove pressure gauge from accumulator port (A) on
service brake control valve (6).
10.
Connect elbow (8) and hose (7) at service brake con-
409-513
trol (6).
11.
Bleed the brake system (WP 0129 00).
END OF WORK PACKAGE
0131 00-6
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