TM-9-2320-361-34
2-1/2-TON, 6x6, M44A2 SERIES TRUCKS (MULTIFUEL)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE
MAY 1992
TM-9-2320-361-34 - Page 355 of 764
TM 9-2320-361-34
15-11. DISCHARGE VALVE REPAIR (M49A2C AND M50A3)
(Contd)
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
15-44
Table
15-2.
Discharge Value Wear Limits.
ITEM
WEAR LIMITS/TOLERANCES
NO.
ITEM/POINT OF MEASUREMENT
INCHES
MILLIMETERS
4
Spring (flee length)
5.0
127.0
7
Cam stem:
Inside stem bore end diameter
0.422-0.437
10.72-11.09
Plug end diameter
0.644-0.648
16.36-16.46
Machined with square
0.497-0.500
12.62-12.70
9
Discharge valve housing:
Inside stem bore/inner diameter
0.433-0.443
10.99-11.25
Outer stem bore/inner diameter
0.651-0.661
16.53-16.79
Inspect cam stem (7) for scoring or cracks and wear. Refer to table 15-2, Discharge Valve Wear
Limits, for measurements. Replace if damaged or worn past limits.
Inspect strainer (2) for tears. Replace if damaged.
Inspect valve housing (9) for cracks, stripped threads, scoring, or worn bores. Refer to table 15-2,
Discharge Valve Wear Limits, for measurements. Replace if damaged or worn past limits.
Inspect cap (3) for wear or cracks at stem hole. Replace if damaged.
Inspect holder (1) for wear or cracks at tapered stem hole. Replace if damaged.
Inspect retainer (10) for cracks or damaged threads. Replace if damaged.
Inspect stem (5) for cracks, scoring, damaged threads, or wear. Replace if damaged or worn.
Inspect cam (6) for wear at stem hole and curved driving surface. Replace if worn.
Inspect nut (8) for wear at stem hole and thread damage. Replace if damaged or worn.
Inspect spring (4) for weak or collapsed coils. Replace if damaged.
Inspect spring (4) free length. Refer to table 15-2, Discharge Valve Wear Limits, for measurements.
Replace spring (4) if worn past limits.
WARNING
Eye protection must be worn during load test of internal spring.
Failure to do this may cause injury to personnel.
NOTE
Perform step 14 for test of new or used internal spring prior to
assembly.
Check load on spring (4). Spring load must be 5.5-6.4 lb-ft (7.5-8.7 N.m) when compressed to 3 in.
(76.2 mm).
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