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TM 5-4210-220-34
2-19.
ENGINE - Continued
INSTALLATION
The oil pressure regulator and the oil pressure relief valve are similar in shape. The only difference between the
two valves is the location of the seat retaining pin which changes valve opening pressure. Serious engine damage
could result if valves are not installed in the correct position.
NOTE
To install the oil pressure relief valve (24), carry out steps 1 and 2.
(1)
Ensure all gasket material is removed from cylinder block (1) and the relief valve body (24).
WARNING
When installing the relief valve assembly in an aluminum housing, use a 3/8 in. plain washer on the capscrews and
make sure the washers are against the aluminum housing.
(2)
Affix a new gasket (25) to the relief valve body (24) and secure to the cylinder block with capscrew (22) and
washers (23). Tighten capscrews to 28 ft lb (38 Nm).
NOTE
To install the oil pressure regulator valve (28) carry out steps 3 and 4.
(3)
Ensure all gasket material is removed from cylinder block (1) and the regulator body (28).
WARNING
When installing the regulator valve assembly in an aluminum housing, use a 3/8 in. Plain washer on the capscrews
and make sure the washers are against the aluminum housing.
(4)
Affix a new gasket (29) to the regulator body (28) and secure to the cylinder block with capscrews (26) and
washers (27). Tighten the capscrews to 28 ft lb (38 Nm).
(5)
Install the key (19) into the crankshaft (11) and then slide the oil pump drive gear (18) into position on the
crankshaft.
(6)
Affix a new gasket (30) to the inner face of the cover (16).
(7)
Coat the lip of the oil seal (31) with vegetable shortening (item 32, Appendix B).
(8)
Install the front cover (16) using oil seal expander J22425A to pilot the oil seal over the crankshaft (11).
Position the cover over the crankshaft and up against the cylinder block. Remove the oil seal expander.
2-231
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