ARMY TM 9-6115-670-14&P
6-47
6.20. CRANKSHAFT GEAR.
This task covers:
a. Test
b. Replace
INITIAL SETUP
Tools
General Mechanic's Tool Kit
(Item 1, Appendix B)
Special Use Puller Set
(Item 9, Appendix B)
Dial Indicator
(Item 36, Appendix B)
Equipment Conditions
Oil pump gear removed (para 6.31.).
Materials/Parts
Crankshaft Gear
Collar
Preformed Packing
Oil Slinger
TEST
a. Set up a dial indicator with its tip on a tooth of the crankshaft gear (4, Figure 6-17).
b. Measure crankshaft gear backlash by holding idle gear still while moving crankshaft gear.
c. If backlash exceeds 0.0059 in. (0.15 mm), test oil clearance between idle gear bushing and idle
gear shaft (para 6.15.).
(1) If oil clearance between idle gear shaft and idle gear bushing is within tolerance, replace
crankshaft gear.
(2) If oil clearance between idle gear shaft and idle gear is out of tolerance, replace idle gear
bushing (para 6.14.) or idle gear shaft (para 6.15.) and retest crankshaft gear backlash. If
backlash still exceeds 0.0059 in. (0.15 mm), replace crankshaft gear.
REPLACE
a. Remove idle gear (para 6.13.).
b. Remove collar (1), preformed packing (2), and oil slinger (3) by hand.
c. Use special use puller set to remove crankshaft gear (4).
d. Install crankshaft gear (4).
NOTE
When performing this procedure, check idle gear (para
6.13.), camshaft gear (para 6.17.), and injection pump
gear (para 6.19.).
