TM 55-1930-209-14&P-21
(3)
Remove oil pump inlet pipe and screen.
(4)
Remove flywheel and flywheel housing.
(5)
Remove crankshaft pulley as follows:
(a) Remove special bolt and washer that secure pulley to crankshaft.
(b) Use a suitable two jaw puller and pull pulley off crankshaft.
(c) Remove key from keyway in crankshaft.
(6)
Remove front engine support.
(7)
Remove engine lower front cover and oil pump assembly.
(8)
Remove connecting rod bearing caps.
(9)
Remove main bearing caps.
(10)
Refer to Figure 6-30 and remove thrust washers from each side of rear main bearing.
(11)
Remove pistons and connecting rods. Remove liners if necessary.
(12)
Remove crankshaft, including timing gear.
b.
Disassembly.
(1)
Disassemble remaining components of crankshaft using Figure 6-30 as a reference.
(2)
Use a suitable puller to remove oil pump drive gear.
NOTE
Do not remove oil pump drive gear unless it shows excessive wear or damage.
6-40
Crankshaft and main bearing cleaning, inspection and repair
a.
Cleaning
WARNING
Wear eye protection when using compressed air.
(1)
Remove crankshaft plugs and thoroughly clean oil passages with a stiff wire brush and blow out passages
with compressed air.
(2)
Wash crankshaft in cleaning solvent and dry with compressed air. Reinstall plugs.
b.
Inspection and repair
(1)
Support crankshaft on its front and rear journals on V-blocks or in a lathe, and check alignment at adjacent
and intermediate journals using a dial indicator.
(2)
Refer to Table 1-1 for maximum allowable wear limits. If runo0t limits are greater than that given in Table
1-1, replace crankshaft.
6-70
