TM-9-2320-272-24-4
TRUCK, 5-TON, 6X6, M939, M939A1, AND M939A2 SERIES TRUCKS (DIESEL)
TECHNICAL MANUAL; UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL; VOLUME 4 OF 4
JUNE 1998
TM-9-2320-272-24-4 - Page 96 of 836
TM 9-2320-272-24-4
5-11. ENGINE OIL PUMP REPAIR (Contd)
17.
18.
19.
20.
21.
22.
Rotate drive gear (17) back and forth to ensure inner gears are free.
Check driveshaft (18) end play. End play must be 0.004-0.007 in. (0.10-0.18 mm).
Install pressure regulator plunger (15), new spring (5), and retainer cap (4) in pump body (14) with
retainer clamp (16), new lockplate (3), new lockwasher (2), and screw (1). Tighten screw (1)
30-35 lb-ft (41-47 N•m).
Bend tabs of lockplate (3) with hammer and drift punch.
Install new bypass spring (7), disc (9), and new bypass seat (8) in filter head assembly (6).
Install new oil pump flange gasket (11) and flange (12) on pump flange (10) with two new
lockwashers (14) and screw-assembled washers (13).
5-90
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