GROVE 11-59
CD3340B/YB4411 STRUCTURAL
11
Published 04/07/2015 Control # 569-00
Installation
1. Using a suitable solvent, clean the holes in the bearing
plate on the main frame. Remove the residue with
compressed air. Clean all dirt from the bearing plate.
2. Put the mast bearing (30, Figure 11-142) in place on the
bearing plate.
3. Install the 24 capscrews (31) and structural washers (6)
to fasten the mast bearing (30) to the bearing plate.
4. Figure 11-140 shows the order for tightening the
capscrews. Each capscrew must first be tightened to a
torque of 384 Nm (282 lb-ft) and then loosened a small
amount. Next, tighten the bolts again to a torque of 384
Nm (282 lb-ft).
5. Make sure the top surface of the mast bearing and the
bottom surface of the mast base are clean.
6. With a hoist, lower the mast into position over the mast
bearing. Install 22 capscrews (18) and structural
washers (19).
7. Figure 11-140 shows the order for tightening the bolts.
Each bolt must first be tightened to a torque of 245 Nm
(180 lb-ft) and then loosened a small amount. Next,
tighten the bolts again to a torque of 245 Nm (180 lb-ft).
8. Install swivel stop (39, Figure 11-142) to the hydraulic
swivel. Attach swivel to mast base with three capscrews
(53) and lockwashers (1).
9. Connect the hydraulic lines and hoses to the hydraulic
swivel.
10. Install lift cylinder to mast.
11. Install boom assembly to mast. See Installation earlier in
this Section.
Swing Gearbox and Pinion
Maintenance
Gearbox
The swing gearbox has a worm gear set which rotates on
taper roller bearings. The gears and bearings are given
lubrication by grease in the gearbox. Gaskets inhibit external
leakage of the grease.
Keep the gearbox filled with grease. See Section 5,
Preventive Maintenance.
Swing Gear/Pinion
The swing pinion and ring gear must be lubricated at regular
intervals. See Section 5, Preventive Maintenance for
maintenance intervals and instructions.
Adjustments
Checking Backlash
1. Remove the front cover to expose the swing pinion and
ring gear.
• Rotating gears can cause injury. Keep hands clear of
rotating pinion and ring gear while mast is rotating.
2. Start the engine and rotate the mast until the high point
(marked with a punch-mark on the edge of the mast
base plate) is in alignment with the pinion. See
Figure 11-143.
3. Using a feeler gauge, check the backlash between the
gear and pinion. There should be no clearance between
the swing gear tooth and the pinion tooth. If there is any
clearance, adjust the backlash.
Adjusting Backlash
NOTE: Be sure the swing gear and pinion are aligned at
the high spot on the swing gear.
Reference Only
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