Manitowoc Grove GRT9165, Руководство по обслуживанию

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8-25
GRT9165 SERVICE MANUAL UNDERCARRIAGE
8
Published 10-01-2020 Control # 699-00 GROVE
Outrigger Beam
Description
The outrigger box assembly(1, Figure 8-26) consists of an
outrigger beam, a jack cylinder (2), an extension cylinder
(23) (including the Outrigger Monitoring System (OMS)
sensor), and the required hoses and mounting hardware.
Theory Of Operation
When the outrigger extension is activated, it extends or
retracts the outrigger beam within the outrigger box. The
outrigger beam can be extended to the mid-extend position
by allowing the lock pin to ride on the top of the beam while
it’s extending. The lock pin will automatically drop into the
hole when the beam reaches the mid-extend position.
The Outrigger Monitoring System (OMS) features a sensor
mounted inside each extension cylinder. The sensor
monitors the position of the outrigger beam—full, half or
retracted.
The jack cylinder (2) is mounted to the end of the beam and
applies force to the outrigger beam vertically. This sequence
of events provides for lifting and stabilizing the crane for
operation.
Maintenance
NOTE: Outrigger beam removal and installation is similar
for both the front and rear outriggers beams
(Figure 8-26).
Removal
1. Remove the outrigger boxes from the crane as
necessary. For more information, see the
Operator
Manual .
2. If necessary, remove capscrews (3), lockwashers (4),
washers (5) from the grab handles (6).
3. If necessary, remove capscrews (7), washers (8),
spacers (9), and grab handles (6) from ladder (10).
4. Remove capscrews (3), lockwashers (4), washers (5),
and the outrigger beam end cover (12).
5. On the jack cylinder end of the beam, loosen the two jam
nuts (14), plates, and wear pads (16).
6. On the opposite end of the beam, remove capscrews
(17), plates (18), and wear pads (19) from the top of
outrigger beam.
7. Extend the outrigger slightly and attach an adequate
lifting device to the outrigger beam (see Figure 8-27).
NOTE: Lifting belts or straps should be used for lifting
purposes so as to avoid nicking or scratching the
bottom edges of the outrigger beam (Figure 8-27).
Outrigger beam assembly, with jack cylinder,
weighs approximately 984 kg (2169 lb).
8. Place adequate blocking material under outrigger beam.
9. Tag and disconnect the hydraulic lines (20) at the
cylinder barrel end of the extension cylinder. Cap all
lines and fittings. Disconnect OMS electrical cable
connection at the outrigger extension cylinder.
NOTE: Do not allow the end of the outrigger beam
extension cylinder to fall when the clevis pin is
removed. Use blocking to limit the drop or an
adequate soft support to cushion any distance the
rod will drop.
10. Remove the cotter pin (21) and clevis pin (22) securing
the cylinder barrel end of the extension cylinder (23) to
the outrigger box. Carefully pull the outrigger beam out
of the outrigger box until the extension cylinder is free of
the box and carefully lay the end of the cylinder on the
bottom of the outrigger beam or leave on blocking.
DANGER
Be sure any blocking material used is capable of
supporting the weight of the outrigger beam. Do not allow
it to tilt or slide.