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TM 9-2815-226-34-2
3-70. INSPECT COMPONENTS
a. Clean all parts in ultrasonic cleaner. Dry thoroughly.
b. Using a micrometer, measure outside diameter of master piston, control valve, and slave piston for uneven wear.
Replace defective part(s).
c. Inspect master piston, control valve, and slave piston for scoring. Replace defective part(s).
d. Test slave piston spring and control valve outer spring on tester.
e. Replace springs not meeting following specifications:
Spring Specifications
Slave Piston Spring
Load at 1.625 in. (41.3 mm) 62.5 - 69.5 lbs (278-309 N)
Load at 1.478 in. (37.5 mm) 71.5 - 80.5 lbs (318-358 N)
Free length 2.58 in. (66 mm)
Number of coils - 13 approx.
Control Valve Spring
Load at 0.5 in. (12.7 mm) 4.7 - 5.3 lbs (21-24 N)
Load at 0.812 in. (20.6 mm) 0.7 - 1.3 lbs (3-6 N)
Free length 0.9 in. (22.9 mm)
Number of coils 8 approx.
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