Outrigger Beam - Manitowoc Grove RT540E Service Maintenance Manual

RT540E SERVICE MANUAL
Symptom
9. Outrigger system activates, but
selected outrigger will not stow or
extend and lower as desired.
10. Outriggers will not set.
11. Two outriggers activate
single control switch.
12. The two outriggers will not stow.
13. Individual outrigger will not set or
stow.

Outrigger Beam

Description
The outrigger beam assembly (Figure 8-30) consists of an
outrigger beam, a jack cylinder, a extension cylinder, 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 jack cylinder 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.
GROVE
Probable Cause
a. Clogged, broken, or loose
hydraulic lines or fittings.
b. Loose or broken wire on
control switch or solenoid
valve.
c. Damaged solenoid valve.
d. Damaged control switch.
e. Damaged hydraulic cylinder.
a. Improper
activation.
from a. Damaged solenoid valves.
a. Hydraulic lock.
a. Damaged piston seals.
b. Damaged check valve.
c. Loosen or broken wire on
control switch or solenoid
valve.
d. Damaged solenoid valve.
Published 4-20-2015, Control # 502-01
a.
b. Repair or replace wiring.
c.
d. Replace switch.
e.
sequence of a.
a.
a.
a.
b. Repair or replace valve.
c.
d. Repair or replace valve.
Maintenance
Removal
1. On the jack cylinder end of the beam, remove the set
screw from the side adjustable wear pad and back off
the wear pad from the outrigger box.
2. Remove the cover from the opposite end of the outrigger
box. Remove the setscrew from the side adjustable wear
pad and back off the wear pad from the beam.
3. Remove the setscrews from the bottom adjustable wear
pads and back off the wear pads leaving approximately
6 mm (0.23 in) protruding
4. Extend the outrigger slightly to facilitate attaching a
lifting device to the outrigger beam.
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. Failure to do so could result in death or
injury to personnel.
5. Place blocking material under the outrigger beam.
UNDERCARRIAGE
Solution
Clean, tighten, or replace
lines or fittings.
Repair or replace valve.
Repair or replace cylinder.
Activate individual control
switch; then activate system
control switch.
Repair or replace.
Recycle individual
outrigger(s).
Replace seals.
Repair or replace wiring.
8-31
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