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 TM 55-1905-223-24-1
(2) Remove hexagon head capscrews (39) and nut and bolt lockplates (38) from each mounting
flange of transfer tube (41).
(3) Remove transfer tube (41) and packing assemblies (37).
c. Remove oil pressure relief valve (4) and gasket (9).
(1) Remove relief valve retaining capscrews.
(2) Remove relief valve (4).
d. Remove oil pump (36).
WARNING
The oil pump is heavy. To avoid personal injury or equipment
damage, use a hoist or get assistance when lifting the oil pump.
NOTE
Measure oil pump to crankshaft gear lash before removing pump.
Acceptable backlash is between 0.0003 in (0.08 mm) and 0.012 in
(0.30 mm). If backlash is less than specifications, remove the
pump and install shims of equal thickness between each of the
mounting legs and the cylinder block. Shims are available in
0.005 in. (0.13 mm) (P/N 3026312) and 0.0010 in. (0.25 mm)
(P/N 3026313). If the backlash is greater than specifications,
remove any shims and check again. If no shims were used, the
pump drive gear or the rear crankcase gear is worn and must be
replaced.
(1) Bend nut and bolt locking plates (6 and 28) away from heads of oil pump mounting hexagon head
capscrews (5 and 29).
(2) Remove hexagon head capscrews (5 and 29), nut and bolt locking plates (6 and 28) and shims (7
and 8).
(3) Remove oil pump (36).
DISASSEMBLY
a. Disassemble safety relief valve (4).
WARNING
Internal parts of the safety relief valve are spring loaded. Exercise
caution during disassembly to avoid personal injury.
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