TM 5-3895-379-23
IDLER GEAR AND HUB REPLACEMENT - CONTINUED
0170 00
INSTALLATION
NOTE
When hub is installed, make sure oil hole marked (X) is at top.
1.
Install idler gear hub (6) on cylinder block (4).
2.
If removed, install two piece bushings (5) on idler gear (3). To install bushings on idler gear:
a.
Press in new bushings.
b.
Machine bores to correct tolerance for clearance on hub. Specification for clearance of bushings on hub is 0.0023 -
0.0047 in. (0.058 - 0.119 mm). Specification for inside of flanged bushings (tilted in position) is 1.998 - 2.0007 in.
(50.80 - 50.82 mm).
c.
Machine faces of bushings to get correct end play clearance of gear. Specification for width of gear and split bush-
ing assembly (tilted in position) is 1.186 - 1.187 in. (30.12 - 30.15 mm). Specification for end play of gear is
0.004 - 0.008 in. (0.10 - 0.20 mm).
3.
Install idler gear (3) on gear hub (6) front of cylinder block (4).
NOTE
Drive gear of fuel injection pump may have to be turned clockwise to align timing marks before install-
ing idler gear.
Ensure timing marks on crankshaft gear, camshaft gear and idler gear are aligned after installation of
idler gear.
4.
Install retaining plate (2) and three bolts (1) on idler
2
1
4
3
gear (3). Tighten bolts to a torque of 33 lb-ft (45
Nm).
NOTE
Idler gear end play is between 0.004 to
0.008 in. (0.10 to 0.20 mm).
5.
Check idler gear (3) end play. Replace idler gear if out
of tolerance.
NOTE
Idler and camshaft gear end play must
have a minimum backlash of 0.003 (0.08
401-979
mm).
CAMSHAFT
CRANKSHAFT
IDLER
FUEL INJECTOR
GEAR
6.
Check timing gear between camshaft (7) and idler
GEAR
GEAR
PUMP GEAR
gear (3). Replace idler gear if out of tolerance.
7.
Install timing gear case cover (WP 0174 00).
END OF WORK PACKAGE
0170 00-3/(0170 00-4 Blank)
