TM 9-2320-289-20
7-6.
SERVICE BRAKE SYSTEM BLEEDING INSTRUCTIONS (Con’t).
10.
Fill master cylinder reservoir to proper level. (See
b.
MANUAL BLEEDING
WARNING
Always wear goggles when bleeding brakes.
may result in serious eye injury.
CAUTION
LO 9-2320-289-12)
Failure to follow this warning
DO NOT allow master cylinder to run out of brake fluid during bleeding
procedures. Frequently check master cylinder fluid level and refill as
required. Ensure that master cylinder cover is securely installed. Failure to
follow this caution will allow air into brake system.
NOTE
If only front or rear half of system has been serviced, it is usually
necessary to bleed only that half of system; however, if firm braking
action cannot be obtained after bleeding, it will be necessary to bleed
entire system.
MANUAL BLEEDING procedures cover bleeding at one wheel. Repeat
steps for each wheel and bleed brakes in the following order:
right
rear, left rear, right front, left front.
If master cylinder is suspected to have air in its bore, perform
steps 1-3.
1.
Disconnect front brake pipe fitting (4)
and
drain
fluid
into
a
suitable
container. Connect front brake pipe
fitting, but DO NOT tighten.
2.
Have an assistant slowly depress
brake pedal to bleed air from loose
front brake pipe fitting (4). Tighten
front brake pipe fitting, then slowly
release brake pedal.
3.
Wait 15 seconds, then repeat steps 1
and 2 until all air is purged from front
connection. Repeat steps 1-3 for rear
brake pipe fitting (4).
4.
Perform steps 4 and 5 in PRESSURE
BLEEDING.
TA49663
7-12
