GROVE 11-63
CD3340B/YB4411 STRUCTURAL
11
Published 04/07/2015 Control # 569-00
10. Apply Loctite 243 to the threads of pinion gear shaft (3).
Install thrust washer (13), washer (23) and lock nut (27).
11. Tighten lock nut (27) to 68 Nm (50 lb-ft), then loosen the
nut and tighten again to a torque of 27.2 - 40.8 Nm (20 -
30 lb-ft). Bend tabs on washer (23) up to lock the nut in
place.
12. Install a new oil seal (2) into motor end cover (22). Install
a new O-ring (21) onto the motor end cover. Be sure to
lubricate both before assembly
13. Install motor end cap (22) to housing (4) and worm shaft
(8) using two socket head capscrews (19). Be sure not
to damage oil seal (22) and O-ring (21).
14. Install a new oil seal (28) and O-ring (21) to end cap
(20).
15. Align the gear teeth of the worm with teeth of the worm
gear.
16. If the original bearing cones and cups were installed into
the end caps and the worm, the existing shims (26, 29,
and 30) may be installed between housing (4) and end
cap (20). Install shims and end cap and fasten with four
capscrews (31).
If new bearings were installed, proper bearing preload
must be determined before final installation of the end
caps.
a. Install end cap (20) without shims installed.
b. Using a dial indicator, measure the amount of axial
movement on the worm. Proper axial movement
must be between -0.025 & +0.05 mm (-0.001 and
+0.002 in). Determine the amount of shim spacing
needed to acquire the proper axial moment, then
install the shims between the housing and the end
cap. After the axial movement is set, check the
backlash between the worm and worm gear teeth.
Backlash should be between 0.127 and 0.177 mm
(0.005 and 0.007 in).
17. If bushing (12) was removed, press a new bushing into
cover (6).
18. Install a new O-ring (10) into cover (6).
19. Using six capscrews (11), install cover (6) onto housing
(4).
20. Install the hydraulic motor.
21. Remove setscrew (16). Fill the gearbox with a Lithium
Base, E.P. No. 2 bearing grease through the grease
fitting located on the housing. Fill gearbox until grease
flows from the setscrew hole.
Installation
1. Install an eyebolt with 1/2 NF threads into the tapped
hole on top of the swing pinion.
2. Install the eccentric ring onto the gearbox.
3. Using an overhead crane and chain attached to the eye
bolt, lift the gearbox into place.
4. Between the gearbox and frame install four spacers (21,
Figure 11-142). Fasten the gearbox to the frame with
four capscrews (20), flat washers (22) and nuts (23).
5. Place a new gasket (25) between gearbox (24) and
swing motor (26). Fasten the swing motor to the gearbox
with two capscrews (27) and lockwashers (11).
6. Connect the two hydraulic hoses to the swing motor.
7. Remove the overhead crane and chain. Remove the
eyebolt.
8. Adjust the backlash between the pinion gear and ring
gear.
9. Coat the teeth of the swing pinion with a gear lubricant.
See Section 5.
10. Install the front cover over the swing pinion.
11. Remove blocking from boom.
12. Start the engine and slowly rotate the boom and mast in
both directions to remove any air that may have entered
the hydraulic circuit.
Outriggers
Removal
1. Engage the parking brake and put chocks at the wheels
to inhibit machine movement.
2. Extend the outrigger, remove snap ring (10,
Figure 11-146) and drive out pin (11). Disconnect the rod
end of the horizontal cylinder (5, Figure 11-146) from the
outrigger beam (6). Retract the horizontal cylinder rod.
3. Lower the inner box assembly (7) just far enough to
remove the load on the outrigger beam (6).
4. Stop the engine. With the ignition switch in the ON
position, actuate the outrigger switches in both
directions to release any pressure in the hydraulic
circuits. Turn the ignition switch to the OFF position and
remove the ignition key.
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