TM 1-1520-238-23
3-278
3.67.
MAIN LANDING GEAR WHEEL BRAKE LEAKAGE AND OPERATIONAL TEST (AVIM)
3.67.1. Description
This task covers:
Brake Leakage and Operational Test.
3.67.2. Initial Setup
Tools:
Aircraft mechanic’s tool kit (item 376, App H)
Light duty laboratory apron (item 27, App H)
Industrial faceshield (item 129, App H)
Chemical protective gloves (item 154, App H)
Hydraulic hose assembly tester (item 349, App H)
Materials/Parts:
Hydraulic fluid (item 93, App F)
Personnel Required:
67R
Attack Helicopter Repairer
67R3F
Attack Helicopter Repairer/Technical
Inspector
Equipment Conditions:
Ref
Condition
3.66
Disk brake removed (Goodyear)
or
3.65
Disk brake removed (Parker-Hannifin)
NOTE
This task is typical for brakes with both
single and three-piece linings.
A standard hydraulic test stand
equipped with pressure gage, a hy-
draulic reservoir, and a means of pro-
viding controlled pressure from 0 to
450 psi are required to test brake as-
semblies.
3.67.3. Brake Leakage and Operational Test
a. Ensure brake assembly fitting (1) is tight.
b. Install pressure line (2) from hydraulic tester
on fitting (1).
c. Bleed air from brake assembly (3). Use hose
assembly tester.
(1) Apply 7 psi hydraulic fluid to brake assembly
(3). Use hydraulic fluid (item 93, App F).
GO TO NEXT PAGE
M04-3652-1
BRAKE
ASSEMBL
Y
PRESSURE
LINE
PRESSURE
GAGE
VENT
SHUT OFF
VALVES
HYDRAULIC
PRESS. SOURCE
M04-3652-2
1
3
2
