UNDERCARRIAGE GRT880 SERVICE MANUAL
8-30
Published 10/19/2017, Control # 618-00
beam from riding on the bottom of the box during
installation.
2. If removed, install two wear pads and plates to the top of
the outrigger beam using two flat head socket screws.
Apply anti-seize to the wear pads.
3. Attach an adequate lifting device of straps or belts to the
beam. Do not use chains, as they may nick the bottom
edges of the outrigger beam (see Figure 8-29).
NOTE: Outrigger beam assembly, with jack cylinder,
weighs approximately 660 kg (1455 lb).
4. Slide the beam into the outrigger housing and align the
cylinder bushing with the mounting hole. Be sure jack
cylinder hydraulic hoses do not get trapped against the
outrigger box during insertion.
5. Apply anti-seeze compound to the clevis pin. Secure the
cylinder barrel to the housing with the clevis pin and
cotter pin.
6. Attach the OMS string potentiometer cable (if equipped)
to the attaching point on the outrigger beam.
If the OMS string potentiometer was removed, install the
potentiometer at this time. Refer to Outrigger Monitoring
System (Optional—Standard in North America), page 8-
32.
NOTE: Avoid free-release of cable to prevent damage to
OMS string potentiometer caused by over-range of
cable.
7. Connect the hydraulic lines as tagged during to removal.
8. Fully extend and retract the outrigger beam, ensuring
the beam assembly rides on the top and bottom wear
pads. If necessary, adjust the bottom two wear pads and
add shims (maximum two shims per wear pad) to
achieve this condition.
Also ensure there is a minimum gap of 2 mm (0.08 in)
per side between the outrigger beam side plates and the
inside of the outrigger box during full travel.
9. Install the outrigger beam end cover.
CAUTION
Be sure that the piston side of all outrigger cylinders are
connected to the solenoid valve bank. Reversal of port
connection of the rod and piston sides could result in
severe damage to the cylinders as very high pressure
intensification will occur.
FIGURE 8-29
Rear Outriggers Shown
For reference only
Reference Only
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