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 TM 55-1905-223-24-1
e. Measure the inner diameter of the large (compound) gear bushing (16). The minimum is: 1.0005 inch
(25.413 mm), and the maximum is: 1.0025 inch (25.464 mm). If the bushing fails to meet specifications,
the large gear must be replaced.
f. Check the gear teeth on the large gear (17) for wear or other evidence of physical damage. Replace gear
if required.
g. Measure the outer diameter of the idler shaft (14). The minimum is: 0.9985 inch (25.362 mm), and the
maximum is: 0.9990 inch (25.375 mm). Replace the shaft if it fails to meet the specifications.
NOTE
An outer diameter of 0.9980 inch (25.349 mm) is acceptable in the
portion of the shaft that fits in the bushing of the compound (16).
h. Measure the thickness of the thrust bearings (15 and 21). The minimum is: 0.110 inch (2.79 mm), and
the maximum is: 0.113 inch (2.87 mm). Replace if not meeting specifications.
i. Check the thrust bearings (15 and 21) for wear or other physical damage. Replace as required.
j. Measure the drive gear (26) bore inner diameter. The minimum is: 1.4973 inch (38.031 mm), and the
maximum is: 1.4983 inch (38.057 mm). Replace gear if it fails to meet specifications.
k. Measure the pump shaft (12) outer diameter. The minimum is: 1.4993 inch (38.082 mm),and the
maximum is: 1.5000 inch (38.100 mm). Replace shaft if it fails to meet specifications.
1. Measure the pump cover (33) bore inner diameter. The minimum is: 2.000 inch (50.80 mm), and the
maximum is: 2.002 inch (50.85 mm). Replace cover if it fails to meet specifications.
m. Measure the shaft retainer (22) outer diameter. The minimum is: 1.998 inch (50.75 mm), and the
maximum is: 2.000 inch (50.80 mm). Replace retainer if it fails to meet specifications.
n. Inspect relief valve components.
(1) Inspect bore of relief valve (4) and plunger (3) for scoring and damage. If damage cannot be
removed using fine grit crocus cloth, replace part.
(2) Check spring (2) length and tension. Replace spring (2) if it does not meet specifications. Table
3-4 .
(3) Check washer (1) for wear. If worn, replace.
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