Grove Published 11-22-2016, Control # 345-12 8-27
RT9130E-2 SERVICE MANUAL UNDERCARRIAGE
Outrigger Beam
Description
The outrigger beam assembly consists of an outrigger beam,
a jack cylinder, a extension cylinder, an Outrigger Monitoring
System (OMS) (Optional—Standard in North America) string
potentiometer, 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.
The Outrigger Monitoring System (OMS) string
potentiometer (if equipped) is mounted inside the outrigger
box and is connected to the outrigger beam by a cable. The
string potentiometer identifies whether an extension beam is
at the fully retracted, mid-extend, or fully extended position.
The OMS communicates the position of each outrigger beam
to the rated capacity limiter (RCL), aiding the operator in
accurately programming the crane’s configuration.
8. Outrigger system will not activate
(from stowed or extended and
down position).
a. Hydraulic oil low. a. Check system for leaks. Make
repairs as needed. Fill
reservoir.
b. Loose or broken wire on
switch.
b. Repair or replace wiring.
c. Clogged, broken, or loose
lines or fittings.
c. Clean, tighten, or replace
lines or fittings.
d. Damaged relief valve or
damaged control valve.
d. Repair or replace valve.
9. Outrigger system activates, but
selected outrigger will not stow or
extend and lower as desired.
a. Clogged, broken, or loose
hydraulic lines or fittings.
a. Clean, tighten, or replace
lines or fittings.
b. Loose or broken wire on
control switch or solenoid
valve.
b. Repair or replace wiring.
c. Damaged solenoid valve. c. Repair or replace valve.
d. Damaged control switch. d. Replace switch.
e. Damaged hydraulic cylinder. e. Repair or replace cylinder.
10. Outriggers will not set. a. Improper sequence of
activation.
a. Activate individual control
switch; then activate system
control switch.
11. Two outriggers activate from
single control switch
a. Damaged solenoid valves. a. Repair or replace.
12. The two outriggers will not stow. a. Hydraulic lock. a. Recycle individual
outrigger(s).
13. Individual outrigger will not set or
stow.
a. Damaged piston seals. a. Replace seals.
b. Damaged check valve. b. Repair or replace valve.
c. Loosen or broken
wire on
control switch or solenoid
valve.
c. Repair or replace wiring.
d. Damaged solenoid valve. d. Repair or replace valve.
Symptom Probable Cause Solution
To Next Page
Loading...
