Grove Published 11-22-2016, Control # 345-12 4-21
RT9130E-2 SERVICE MANUAL BOOM
9. Lubricate the upper lift cylinder pin and related bushings
in the lift cylinder rod end and the boom’s lift cylinder
attach lugs.
10. Using the lifting device attached to the boom, lower the
boom onto the lift cylinder rod end. Activate the crane’s
hydraulic system and align the lift cylinder rod end with
the boom’s lift cylinder attachment lug holes as needed.
11. Using the hand pump located on the left side of the
boom, insert the pump lever (found in cab) into the hand
pump. Turn the pump flow control lever
counterclockwise and pump the pump lever until the
upper lift cylinder pin pins the rod end of the lift cylinder
to the boom’s lift cylinder attachment lugs, and the upper
lift cylinder pin’s flange portion fits completely against
the left side of the boom’s left lift cylinder attachment lug.
The lift cylinder may need to be raised or lowered to aid
in the installation of the upper lift cylinder pin. This can
be done by using the jack on the lift cylinder support.
Shut down the engine.
12. Apply Grove-approved threadlocking compound to the
upper lift cylinder pin’s related capscrew. Secure the
upper pivot shaft to the boom with the capscrew and
washer.
13. Lower the jack on the lift cylinder support.
14. Remove the boom lifting device.
15. Activate the hydraulic system and remove the boom and
lift cylinder blocking devices. Lower the boom to
horizontal. Shut down the crane.
16. Connect the hydraulic lines to the lower telescope
cylinder as tagged prior to removal.
17. Feed the hose reel lines through the rollers at the rear of
the base. Reach through the hole in the top of the base
section and attach the hose reel lines to the hydraulic
manifold as tagged prior to removal.
18. Using your hand, pull on the hose reel lines, then
remove the S-hook from the hose reel (Figure 4-4).
Continue to hold tension on the hoses as you allow them
to wrap up on the reel.
19. Being careful not to pinch or damage the hoses, extend
the boom to take up the majority of the slack in the
hoses; be sure to leave some slack in the lines.
20. With the engine off, connect the hose reel supply line to
the valve bank (Figure 4-3).
21. While watching to ensure the hoses on the hose reel
wrap up correctly, have an assistant start the engine, but
do not actuate the telescope control; the hydraulic
system will automatically finish wrapping the hoses on
the hose reel.
22. Install the base cover on top of the boom base section,
secure with four bolts and washers.
23. Connect any electrical wires as tagged prior to removal.
24. Refer to Boom Extension and Retraction Cables, page
4-22 for cable adjustments.
25. Refer to Cam Operated Check Valve Adjustment, page
4-22 for valve adjustment.
Functional Check
1. Activate the hydraulic system and check for proper
operation and any leaks.
2. Ensure the boom will extend and retract properly.
3. Ensure the lift cylinder will not allow the boom to drift
down until the operator lowers it.
4. Ensure all electrical components disconnected during
removal are operating properly.
Inspection
Visually inspect telescoping sections for adequate lubrication
of all wear surfaces. Observe extended sections for
evidence of cracks, warping, or other damage. Periodically
check security of boom wear pads. Check boom nose
sheaves for security and freedom of movement.
Should boom chatter or rubbing noises in the boom occur, it
will be necessary to lubricate the telescope cylinder wear
pads. Refer to Lubrication, page 9-1.
Boom Alignment and Servicing
Refer to Arctic Lubricants and Conditions, page 9-3 for the
proper lubricant.
DANGER
Crushing Hazard!
Failure to properly support the boom lift cylinder may
result in death or serious injury.
CAUTION
If the hydraulic system must be activated to extend or
retract the lift cylinder, ensure the rod end is properly
aligned with the lift cylinder attach fitting.
CAUTION
If removed, ensure the large access covers on each side
of the boom base section are installed before extending
the boom.
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