Remove the bolts securing the split flange
hydraulic return line hose at the hydraulic tank and
It might be necessary to raise the boom
allow hydraulic oil to drain into drain pan. Then
slightly to allow installation of the blocking.
remove bolts securing split flanges at air/hydraulic
swivel port no. 14. Install flange plugs in both open
This blocking is to add extra support for the
ports and secure with split flanges and bolts. Cover
boom. Any seepage or leakage in the
both ends of hydraulic return line hose with plastic
holding valve or internally in the cylinder
wrap and tape and stow in storage box.
will allow the boom to settle over a period
10. Tag and disconnect the hydraulic lines from the
spool of the swivel. Cap all lines and openings.
Use the oak blocking to block between the barrel
of the lift cylinder and the boom base section.
Remove the electrical swivel, refer to
The hydraulic swivel weighs approximately
ELECTRICAL SWIVEL - REMOVAL in this Section.
203 lbs (92 kg).
Bleed air pressure from the air system at the air
11. Position an adequate supporting device beneath
Tag and disconnect six air lines at the air/hydra-
12. Remove the bolts, and washers securing the
ulic swivel, ports 1 thru 6. Install plugs, couplers, and
swivel to the superstructure and lower the swivel to the
fittings in each of the disconnected air lines except for
those connected to port nos. 5 and 6. Bundle the
disconnected air lines in plastic wrap and tie wraps.
Then tie wrap them to the carrier, up and out of the
way. Cover/plug the six air line openings in the
Raise the swivel into position.
Secure the swivel to the turntable with the
bushings, bolts, and washers. Torque the bolts to 250
Use suitable drip pan to catch hydraulic oil.
lbs-ft (338.9 Nm).
Remove the split flange hydraulic return
Install the electrical swivel, refer to ELECTRICAL
line hose connected to air/hydraulic swivel
SWIVEL - INSTALLATION in this Section.
port no. 14 last.
Install the hydraulic lines to the spool as tagged
Tag and disconnect seven hydraulic hoses on
the bottom of the air/hydraulic swivel, ports 7 thru 13.
Install plugs in the hydraulic hoses and caps on the
Remove protective covers on both ends of
air/hydraulic swivel ports. Cover all loose hydraulic
hydraulic return line hose. Remove flange plugs in
hoses with plastic wrap/bag and tape or tie wrap. Then
hydraulic tank and in air/hydraulic swivel port no. 14.
tie wrap them to the carrier, up and out of the way.
Retain split flanges and attaching hardware. Install
hydraulic return line hose between port no. 14 and
hydraulic tank. Secure with bolts and split flanges.
There will be considerable hydraulic oil
Cut tie wraps; remove plastic wrap/bags, plugs,
draining from the hydraulic drain line hose.
and caps; and connect seven hydraulic hoses on the
bottom of the air/hydraulic swivel, ports 7 thru 13 as
tagged. Remove all tags.