ARMY TM 9-6115-670-14&P
6-41
6.17. CAMSHAFT GEAR.
This task covers: a. Test
b. Replace
INITIAL SETUP
Tools
Special Use Puller Set
(Item 9, Appendix B)
Dial Indicator
(Item 36, Appendix B)
Equipment Conditions
Gear case removed (para 6.12.).
Materials/Parts
Timing Gear
TEST
a. Set up a dial indicator (1, Figure 6-14) with its tip on a tooth of the camshaft gear (3).
b. Measure camshaft gear backlash by holding idle gear still while moving camshaft gear.
c. If backlash exceeds 0.0059 in. (0.15 mm), test oil clearance between idle gear bushing and idle
gear (para 6.14.).
(1)
If oil clearance between idle gear shaft and idle gear bushing is within tolerance, replace
camshaft 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 camshaft gear backlash. If
backlash still exceeds 0.0059 in. (0.15 mm), replace camshaft gear.
REPLACE
a. Remove idle gear (para 6.13.).
b. Use puller set to remove old camshaft gear (3) from camshaft (2).
c. Install new camshaft gear (3) on camshaft (2).
d. Ensure that gear is properly aligned (para 6.13.).
NOTE
When performing this procedure also check idle gear
(para 6.13.), injection pump gear (para 6.19.), and
crankshaft gear (para 6.26.).
