72 - 2
Removal and Replacement
Boom Lock Cable
The boom lock control
A
and associated cable is housed in
the R.H. side console as shown.
Note the routing of the existing cable and route the new
cable in the same way.
Removal
1
Park the machine on firm level ground, apply the
parking brake. Lower the loader arms and excavator to
the ground, switch OFF the engine and remove the
starter key.
2
Working at the boom, remove the cable ball stud
B
from
the boom lock casting.
3
Loosen the lock nut and disconnect the bulkhead fitting
C
from the bracket. Feed the end of the cable back
underneath the cab to the rear wheel arch on the R.H.
side of the machine and release the cable from the
clamp assembly at position
X
as shown. Remove the
spring clip
D
from the outer sleeve.
4
Working in the cab, unscrew the knob and lock nut from
the boom lock control
A
. Remove the fixings from the
side console panel and carefully lift up the rear corner
of the side console panel over the boom lock control
outer sleeve.
5
With the rear corner of the side console panel lifted up,
carefully pull the boom lock cable up into the cab
through the aperture in the cab floor.
Replacement
Replacement is the reverse of the removal sequence.
1
After fitting the cable, with the control knob pressed
down adjust the bulkhead fitting
C
to take up any slack
in the cable. The cable should be tight but must not lift
the boom lock from its fully down position.
2
Operate the boom and check that the boom lock will
engage and disengage correctly using the control knob
in the cab. Check the boom stop setting, see
Boom
Stop Setting
.
Section D
9803/3280
Section D
72 - 2
Issue 1
Control Cables
Boom Stop Setting
The boom stop block should be set as follows:
1
Lightly secure the boom stop block
1
in its lowest
position.
2
Raise the boom lock
2
using the control knob in the
cab.
3
Fully raise the boom (i.e. the boom ram fully retracted)
and engage the boom lock using the control knob in the
cab.
4
With the engine switched OFF, operate the excavator
control levers several times to vent any resisdual
pressure from the boom ram.
5
Adjust the boom stop block
1
until there is 3 mm (1/8
in.) gap between the stop and the boom profile as
shown at
3
.
6
Tighten clamping bolt
4
. Tighten grubscrew
5
and lock
nut
6
.
7
Switch ON the engine. Fully raise the boom (i.e. the
boom ram fully retracted) and raise the boom lock using
the control knob in the cab.
8
If the boom lock does not release readjust the stop
block as follows:
a
Loosen the lock nut
6
and slacken the grubscrew
5
a further half turn.
b
Loosen clamping bolt
4
and reposition the stop
block. Retighten bolt
4
and lock the grubscrew.
9
Operate the boom and check that the boom lock will
engage and disengage correctly using the control knob
in the cab.
Torque Settings
Item
Nm
kgf m
lbf ft
E
476
48
352
