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 - Page 234 of 736
TM 9-2815-225-34&P
0023 00
0023 00-4
OIL PUMP (Contd)
BIG CAM I (Contd)
Assembly
NOTE
Lubricate all parts with OE/HDO 10 lubricating oil before
assembly.
New bushings must be line reamed to size before oil pump
assembly.
1.
Using press and mandrel, install new bushing (22) in idler gear (23). Do not press bushing (22)
more than 0.020 in. (0.508 mm) below top surface of idler gear (23). Using drill press and reamer,
line-ream inside diameter of bushing (22) to 0.8767–0.8777 in. (22.268–22.293 mm).
2.
Using press and mandrel, install two new bushings (8) in oil pump body (7). Do not press
bushings (8) more than 0.020 in. (0.508 mm) below top surfaces of oil pump body (7). Using drill
press and reamer, line-ream inside diameter of bushings (8) to 0.8767–0.8777 in.
(22.268–22.293 mm).
3.
Using press and mandrel, install new bushing (13) in oil pump housing (15). Do not press
bushing (13) more than 0.020 in. (0.508 mm) below top surfaces of oil pump housing (15). Using
drill press and reamer, line-ream inside diameter of bushing (13) to 0.8767–0.8777 in.
(22.268–22.293 mm).
4.
Using press, install oil pumping gear (12) on oil pump driveshaft (11).
5.
Using press, install oil pump driveshaft (11), with oil pumping gear (12) attached, in oil pump
body (7) until oil pump driveshaft (11) protrudes 1.035–1.055 in. (26.29–26.80 mm) above oil
pump body (7).
6.
Using press, install idler shaft (24), with large end facing up, in oil pump body (7) until large end
protrudes 0.9375–1.0 in. (23.81–25.40 mm) above oil pump body (7).
7.
Install idler gear (23) on idler shaft (24).
8.
Using feeler gauge, check clearance from oil pumping gear (12) to oil pump body (7). Clearance
should be 0.060–0.070 in. (1.52–1.78 mm). Remove and install oil pumping gear (12) until correct
clearance is obtained.
9.
Install dowel pin (10) in oil pump body (7).
10.
Install new gasket (14) and oil pump housing (15) on oil pump body (7) with two washers (21),
three new lockwashers (17), and six screws (18). Tighten screws (18) 35 lb-ft (48 N
•
m).
WARNING
Oil pump pressure regulator spring is under tension. Install
oil pump pressure regulator screw slowly and wear proper eye
protection. Failure to do so may result in injury to personnel.
11.
Install plunger (5), new pressure regulator spring (4), retaining yoke (3), new lockplate (2), and
screw (1), in oil pump body (7). Tighten screw (1) 35 lb-ft (48 N
•
m).
12.
Using pipe sealant, install pipe plug (6) in oil pump body (7). Tighten plug (6) 30 lb-ft (41 N
•
m).
13.
Install connector (16) on oil pump housing (15).
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