ARMY TM 9-6115-670-14&P
6-45
6.19. INJECTION PUMP 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
Gear case removed (para 6.12.).
Materials/Parts
Injection Pump
TEST
a. Set up a dial indicator (1, Figure 6-16) with its tip on a tooth of the injection pump gear (3).
b. Measure injection pump gear backlash by holding idle gear still while moving injection pump 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
injection pump 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 injection pump gear backlash. If
backlash still exceeds 0.0059 in. (0.15 mm), replace injection pump gear.
REPLACE
a. Remove idle gear (para 6.13.).
b. Use special use puller set to remove injection pump gear (3) from fuel camshaft (2).
c. Install injection pump gear (3) on fuel camshaft (2).
d. Install idle gear (para 6.13.).
e. Ensure that gear is properly aligned (para 6.13.).
NOTE
When performing this procedure, also test idle gear
(para 6.13.), camshaft gear (para 6.17.), and crankshaft
gear (para 6.20.).
