ARMY TM 9-2815-259-24
AIR FORCE TO 38G1-125-2
MARINE CORPS 09249A/09246A-24
5-54
Table 5-4. Camshaft and Timing Gear Train Specifications – CONT.
Balancer Shaft Bearing Journal Diameter
1.5801 – 1.5811 in. (40.135 – 40.161 mm)
Balancer Shaft Bushing ID
1.5818 – 1.5841 in. (40.177 – 40.237 mm)
Bushing-to Journal Clearance
0.0006 – 0.0040 in. (0.016 – 0.102 mm)
Cylinder Block Bore diameter for Balancer Shaft
Bushing (Standard)
1.7032 – 1.7042 in. (43.262 – 43.288 mm)
Balancer Shaft Thrust Plate Thickness
0.117 – 0.119 in. (2.97 – 3.02 mm)
Balancer Shaft End Play
0.002 – 0.010 in. (0.05 – 0.26 mm)
Oil Clearance:
Upper Idler Gear Bushing-to-Shaft
0.0030 - 0.0049 in. (0.075 - 0.125 mm)
Lower Idler Gear Bushing-to-Shaft
0.0010 - 0.0040 in. (0.026 - 0.102 mm)
Timing Gear Backlash:
Upper Idler Gear-to-Camshaft Gear
0.0030 - 0.0162 in. (0.077 - 0.412 mm)
Upper Idler Gear-to-Injection Pump Gear
0.0030 - 0.0162 in. (0.077 - 0.412 mm)
Upper Idler Gear-to-Crankshaft Gear
0.0025 - 0.0127 in. (0.065 - 0.322 mm)
Lower Idler Gear-to-Crankshaft Gear
0.0026 - 0.0132 in. (0.067 - 0.336 mm)
Lower Idler Gear-to-Oil Pump Gear
0.0032 - 0.0135 in. (0.081 - 0.342 mm)
Lower Idler Gear-to-Balancer Shaft Gear
0.0028 – 0.0141 in. (0.071 – 0.359 mm)
Oil Pump-to-Balancer Shaft Gear
0.0025 – 0.0141 in. (0.065 – 0.358 mm)
b. Removal.
(1)
Remove timing gear cover, refer to paragraph 4.9.2.
(2)
Remove oil pan, refer to paragraph 4.5.3.
(3)
Remove bolt (1, Figure 5-63) and thrust washer (2) securing upper idler gear (3) to shaft (5);
remove idler gear (3).
(4)
Remove nut (8), washer (9), and thrust washer (10) securing lower idler gear (11); remove idler
gear (11).
(5)
If necessary, use an arbor press and remove bushings (4 and 12) from gears (3 and 11).
(6)
Remove bolt (13) and washer (14) from lower idler gear shaft (15).
(7)
Remove lower idler gear shaft (15) from front plate using a pry bar. Remove thrust washer (17).
(8)
Remove upper idler gear shaft (5) from front plate using a pry bar. Remove thrust washer (7).
(9)
Remove spring pins (6 and 16) from shafts.
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