Grove
Published 1-20-2017, Control# 483-02
11-27
CD5515-2/YB5515-2 SERVICE MANUAL
STRUCTURALS
11
Adjustment
Checking Backlash
Check the backlash between the swing gear and the swing
gearbox pinion every six months or after 1500 hours of
operation, whichever occurs first.
1.
Remove the swing gear pinion cover.
2.
Start the engine and rotate the mast until the high point
on the swing gear is engaged with the pinion
(Figure 11-22). The high point is punch-marked on the
edge of the gear or is a painted mark on the gear.
3.
Using a 0.013 mm (0.005 in) feeler gauge, check the
backlash between the gear and pinion. There should be
0.013 mm (0.005 in) clearance between the swing gear
tooth and the pinion tooth. If there is any other
clearance, adjust the backlash.
Backlash Adjustment
NOTE:
Be sure the swing gear and pinion are aligned at
the high spot of the swing gear.
1.
Slightly loosen the four bolts securing the gearbox
(Figure 11-22).
2.
Use a 0.013 mm (0.005 in) feeler gauge between the
pinion and swing gear.
3.
With a spanner wrench, turn the eccentric ring to move
the pinion until it contacts the feeler gauge (0.013 mm
(0.005 in) backlash).
4.
Tighten the four bolts to appropriate torque.
5.
Install the swing pinion cover.
FIGURE 11-22
a0157
or Paint Mark
Reference Only
