Cub Cadet 8454 Service Manual page 73

b. Timing Gears and Camshafts
(A) Timing gear backlash
1. Set a dial indicator (lever type) with its tip on the
gear tooth.
2. Move the gear to measure the backlash, holding its
mating gear.
3. If the backlash exceeds the allowable limit, check
the oil clearance of the shafts and the gear.
4. If the oil clearance is proper, replace the gear.
Factory
Clearance
spec.
Allowable
limit
(B) Idle gear side clearance
1. Pull the idle gear collar 2 (1) and push the idle gear
(2) to each end.
2. Measure the clearance A between the idle gear and
the idle gear collar 2 (1) with a feeler gauge.
3. If the clearance exceeds the allowable limit, replace
the idle gear collar 1 (3).
Side Factory
clearance spec.
Allowable
limit
(C) Cam gear side clearance
1. Pull the cam gear (2) with the camshaft (1) to its
end.
2. Measure the clearance A between the cam gear (2)
and the camshaft stopper (3).
3. If the clearance exceeds the allowable limit, replace
the camshaft stopper (3).
Side Factory
clearance spec.
Allowable
limit
D569-W02 May-2003
K&T Saw Shop 606-678-9623 or 606-561-4983
www.mymowerparts.com
0.04 ~ 0.11 mm
0.0016 ~ 0.0043 in.
0.15 mm
0.0059 in.
0.20 ~ 0.51 mm
0.0079 ~ 0.021 in.
0.9 mm
0.035 in.
0.07 ~ 0.22 mm
0.0028 ~ 0.0087 in.
0.3 mm
0.0118 in.
(1) Idle Gear Collar 2
(2) Idle Gear
(1) Camshaft
(2) Cam Gear
ENGINE
569W293A
569W294A
(3) Idle Gear Collar 1
569W295A
(3) Camshaft Stopper
2-51