August 2018
Part No. 57.4400.9220GT
GTH-2506 GTH-3007
4-11
Section 4 • Repair Procedures
8 Securely attach a resistant guide rope (length
about 33 feet / 10 m) to the hydraulic hose.
This will be used to install the new double-
hose.
9 Reach the back of the machine and remove the
cover.
10 Pull the double hose "
e
" outward until it comes
out completely.
11 Move to the front of the boom and tag,
disconnect and plug the hydraulic hoses from
the pipes.
WARNING
Bodily injury hazard. Spraying
hydraulic oil can penetrate and
burn skin. Loosen hydraulic
connections very slowly to allow
the oil pressure to dissipate
gradually. Do not allow oil to
squirt or spray.
e
12 Pull hoses "
e
" outward until it comes out
completely.
13 Remove the rope from the old hydraulic hoses
and attach it to the new hydraulic double-hose
(straight end side).
14 Install the hoses "
e
" from underneath the boom:
pull them from the rear side of the boom.
15 Connect the ends of the new double-hose to
the pipes.
16 Install the hoses "
e
" from behind the boom: pull
them from the front side of the boom to connect
the straight ends to the shut-off valve.
NOTICE
Component damage hazard.
Hoses can be damaged if they
are kinked or pinched.
17 Start the engine, and extend and retract the
boom. Verify that there are no abnormal
tensions on the hoses.
BOOM COMPONENTS
