Grove Published 11-22-2016, Control # 345-12 4-39
RT9130E-2 SERVICE MANUAL BOOM
BOOM REMOVAL SYSTEM
Description
The boom removal system (Figure 4-9) uses hydraulic
cylinders to extend and retract the upper lift cylinder pin and
the pivot shafts. The upper lift cylinder pin uses a hand
activated pump. The pivot shaft cylinder uses the hydraulic
lines from the counterweight removal system.
Maintenance
NOTE: The upper lift cylinder pin and the boom pivot shafts
should only be serviced when the boom is off of the
crane. These procedures assume the lift cylinder
has been removed from the boom.
Upper Lift Cylinder Pin and Cylinder Disassembly
1. Tag and disconnect the hydraulic lines from the hand
pump to the cylinder used to remove the upper lift
cylinder pin at this cylinder. Plug these lines.
2. Remove capscrew and washer from upper lift cylinder
pin as needed.
3. Remove the two nuts and lockwashers from the two
support rods.
4. Pull the upper lift cylinder pin and its pin removal cylinder
(jack cylinder) away from the boom until the latch plate
clears the threads on the support rods.
5. Remove the snap rings from the latch plate. Remove the
latch plate from the pin removal cylinder.
6. Remove the capscrews and lockwashers from the lid
weldment. Remove the lid weldment and pin removal
cylinder from the upper lift cylinder pin.
7. Remove hitch pin clip, washer, and clevis pin from the lid
weldment. Remove pin removal cylinder from lid
weldment.
8. Remove upper lift cylinder pin from boom’s lift cylinder
attachment lugs as needed.
9. Remove support rods from the boom’s left lift cylinder
attachment lug as needed.
Upper Lift Cylinder Pin and Cylinder Assembly
1. If removed, secure support rods to the boom’s left lift
cylinder attachment lug.
2. If upper lift cylinder pin was removed, coat upper lift
cylinder pin and surfaces of bushings in boom’s lift
cylinder attachment lugs with grease. Install this pin onto
support rods.
3. Install pin removal cylinder (jack cylinder) on lid
weldment. Secure cylinder to lid weldment with hitch pin
clip, washer, and clevis pin.
4. Install the lid weldment and cylinder onto the upper lift
cylinder pin. Secure lid weldment with capscrews and
lock washers.
5. Secure the pin removal cylinder to the latch plate with
two snap rings.
6. Secure the latch plate to the two support rods with two
nuts and lock washers.
7. Connect the hydraulic lines from the hand pump to the
cylinder as tagged before removal.
8. Install upper lift cylinder pin into lift cylinder attach lugs of
boom and secure with the capscrews and washers.
Torque the capscrews; refer to Fasteners and Torque
Values, page 1-18 for the torque values for the
capscrews.
Boom Pivot Shafts and Cylinder Disassembly
1. If attached, remove capscrews, washers and nut
fasteners from the base cover. Remove base cover.
2. If installed, remove capscrews and washers from each
pivot lock weldment. Remove pivot lock weldments from
pivot shafts.
3. Working through the pivot pins, remove nuts and
washers from both of the cylinder’s rod ends. Pull both
pivot shafts outward to free cylinder. Remove cylinder
through the base access hole.
4. Remove capscrews, washers, and nuts from each set of
brackets. Remove brackets from cylinder, noting
position of brackets.
5. If needed, tag and disconnect hydraulic line and fittings
from cylinder.
6. Remove capscrews and washers from each lock plate
weldment. Remove lock plate weldments from the pivot
shafts.
7. Remove pivot shafts if needed. Remove grease fittings
from the pivot shafts if needed.
Boom Pivot Shafts and Cylinder Assembly
1. Install grease fittings in the pivot shafts.
2. Coat the pivot shafts and the boom pivot bushings with
grease. Install the pivot shafts into the boom’s pivot
bushings.
3. Install each lock plate weldment onto the pivot shafts.
Secure lock plate weldments to pivot shafts with
capscrews and washers.
4. Install pivot shaft cylinder through base access hole and
position the rod end flats to match with the tabs on each
lock plate weldment. Slide pivot shafts onto the rod
ends. Secure both cylinder rod ends to the pivot pins
with nuts and washers.
To Next Page
Loading...
Need help?
General
