4-57
Published 3/26/2018, Control # 596-05
GRT8100 SERVICE MANUAL BOOM
ADJUSTING BOOM EXTENSION STOWAGE
MOUNTS
NOTE: Refer to Figure 4-102 and Figure 4-103.
NOTE: Tighten and torque all bolts and nuts to the
specifications defined under Fasteners and Torque
Values, page 1-15.
NOTE: Installation and removal of all attachment pins
should be possible by hand or with no more than
three taps of a hammer.
1. Fully extend and set outriggers.
2. Position boom over front of crane.
3. Fully retract the boom.
4. Lower boom to minimum elevation.
NOTE: Use auxiliary crane as needed to lift boom
extension and relieve tension when adjusting a
stowage bracket assembly.
5. Ensure lock hitch pin securing base section to the front
stowage bracket (1) is installed.
6. Remove caps and connect boom extension mount
control pendant to connector on front of boom base.
7. Remove attachment pin securing fly section to rear
stowage bracket assembly (5) on the main boom.
Stow attachment pin in opposite attach fitting or stowage
lug and secure with retaining clip.
8. Using control pendant, extend middle stowage bracket
(4) to align right front base section anchor fittings with
boom nose attachment fittings.
Ensure middle stowage bracket extends easily.
Install the two attachment pins.
9. If lugs do not align, adjust base section front stowage
bracket assembly (1) as follows:
a. Adjust base section front stowage bracket assembly
up or down until the lugs are in alignment.
b. Extend the middle stowage bracket (4) and align the
two pin holes on the boom nose with the base
section, adjusting the stowage bracket up or down
as needed using jack bolt.
c. Install the two attachment pins.
d. Tighten and torque all mounting bolts to
specification.
e. Tighten locking nut on jack bolt.
10. Remove the two attachment pins from the anchor and
attachment fittings of the boom nose and base section.
11. Slowly retract middle stowage bracket (4).
Ensure roller on bottom of fly section aligns with the
center of the fly section front stowage ramp assembly (2)
and is touching enough to remove tension from the
boom extension.
12. If required, adjust fly section stowage ramp assembly (2)
as follows:
a. Adjust fly section stowage ramp up or down using
jack bolt until tension is slightly removed from boom
extension.
b. Tighten and torque all mounting bolts to
specification.
c. Tighten locking nut on jack bolt.
13. If required, adjust middle stowage bracket and actuator
assembly (4) up or down using jack bolts.
Tighten all mounting bolts to specification. Tighten lock
nuts on jack bolts.
14. Ensure lock hitch pin securing base section to the front
stowage bracket assembly (1) is installed.
15. Retract middle stowage bracket (4) to align holes in fly
section attachment fittings with rear stowage bracket
assembly (5) fitting on main boom.
Ensure middle stowage bracket (4) retracts easily.
Install attachment pin.
16. If lugs do not align, adjust rear stowage bracket
assembly (5) on the main boom up or down as required.
Tighten all mounting bolts to specification.
17. If required, adjust main boom attachment bar at the
boom base to fly section attachment bracket assembly
(3) such that the locking bar pin can be easily inserted
and removed.
Tighten the two mounting bolts and nuts to specification.
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