TM-9-2815-225-34-P

ENGINE, DIESEL: 6 CYLINDER IN-LINE TURBOCHARGED, CUMMINS MODEL NTC-400

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

JULY 2005
TM-9-2815-225-34-P

  TM-9-2815-225-34-P - Page 236 of 736

TM 9-2815-225-34&P
0023 00
0023 00-6
OIL PUMP (Contd)
BIG CAM III
Disassembly
1.
For oil pump removal, refer to WP 0010 00.
2.
Using gear puller, remove oil pump drive gear (1) from oil pump driveshaft (10).
3.
Remove woodruff key (9) from oil pump driveshaft (10).
4.
Remove retaining ring (17) and coupling (16) from oil pump driveshaft (10).
5.
Remove pipe plug (15) from oil pump cover (14).
WARNING
Oil pump pressure regulator spring is under tension. Remove
oil pump bypass screw slowly and wear proper eye protection.
Failure to do so may result in injury to personnel.
6.
Remove screw (27), washer (26), retainer (25), pressure regulator spring (23), and plunger (22)
from oil pump body (3). Discard pressure regulator spring (24).
7.
Remove two O-rings (24) from retainer (25). Discard O-rings (24).
8.
Remove seven screws (18), oil pump cover (14), and gasket (13) from oil pump body (3). Discard
gasket (13).
9.
Remove dowel pin (8) from oil pump body (3).
10.
Remove bypass valve seat (7), bypass valve disc (6), washer (5), and bypass valve spring (4) from
oil pump body (3). Discard bypass valve spring (4),
11.
Using press, remove oil pump driveshaft (10), with oil pumping gear (11) attached, from oil pump
body (3).
12.
Using press, remove oil pump driveshaft (10), from oil pumping gear (11).
13.
Remove idler gear (20) from idler shaft (21).
14.
Using press, remove idler shaft (21) from oil pump body (3).
15.
Using press and mandrel, remove two bushings (2) from oil pump body (3). Discard bushings (2).
16.
Using press and mandrel, remove bushing (12) from oil pump cover (14). Discard bushings (12)
and (19).
17.
Using press and mandrel, remove two bushings (21) from idler gear (20). Discard bushing (21).
Cleaning and Inspection
1.
For general parts cleaning information, refer to CLEANING, WP 0051 00.
2.
For general parts inspection information, refer to INSPECTION, WP 0051 00.
NOTE
Replace any part that does not pass visual inspection or is
outside specified wear limits.
3.
Inspect oil pump drive gear (11) and idler gear (20) for cracks and stripped or chipped teeth.
4.
Inspect oil pump body (3) and oil pump cover (14) for cracks and stripped or elongated threaded
bolt holes. Repair all stripped or elongated threaded bolt holes.
5.
Inspect dowel pin (8) for cracks or distortion.


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