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 202 of 736

TM 9-2815-225-34&P
0019 00
0019 00-6
CAMSHAFT, CAMSHAFT FOLLOWERS, AND PUSH RODS (Contd)
CLEANING AND INSPECTION (Contd)
15.
Inspect roller (4) to ensure it is not out-of-round. Discard intake (1), injector (2), or exhaust cam
follower (3) if roller (4) is out-of-round.
NOTE
Outside diameter of roller must measure 1.2495–1.2505 in.
(31.737–31.763 mm).
16.
Using micrometer, measure roller (4) outside diameter. Discard intake (1), exhaust (3) or injector
cam followers (2) if outside diameter measures less than 1.2485 in. (31.712 mm).
17.
Check concentricity of inside diameter with outside diameter of intake (1), injector (2), and
exhaust cam followers (3). Discard intake (1), injector (2), or exhaust cam followers (3) if
concentricity of inside diameter with outside diameter is not within 0.0020 in. (0.051 mm).
18.
Check intake (1), injector (2), and exhaust cam follower (3) squareness of sides with roller pin
bore. Discard intake (1), injector (2), and exhaust cam followers (3) if sides are not parallel to each
other or not square to bore within 0.0040 in. (0.102 mm).
19.
Inspect roller pin (6) for cracks, breaks, and other damage. Discard intake (1), injector (2), and
exhaust cam followers (3) if roller pin (6) is damaged.
NOTE
Intake or exhaust roller pin outside diameter must measure
0.4997–0.500 in. (12.692–12.700 mm). Injector roller pin
outside diameter must measure 0.6997–0.7000 in.
(17.772–17.780 mm).
20.
Using micrometer, measure outside diameter of roller pin (6).
a.
Discard intake (1) or exhaust cam followers (3) if outside diameter measures less than 0.497
in. (12.624 mm).
b.
Discard injector cam follower (2) if outside diameter measures less than 0.697 in. (17.704
mm).
21.
Using micrometer, measure roller pin bore (5).
a.
Discard intake (1) or exhaust cam followers (3) if roller pin bore (5) is not within
0.4990–0.4995 in. (12.675–12.687 mm).
b.
Discard injector cam follower (2) if roller pin bore (5) is not within 0.6992–0.6997 in.
(17.760–17.772 mm).


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