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7 - 2
Checking/Adjusting the Track Tension
1
Prepare the Machine
Position the machine on level ground. Run it
backwards and forwards several times. Stop after
running it forwards.
Carry out steps 1 to 3 of
Cleaning the Tracks
. Block
up the undercarriage frame. Finish track rotation by
running the track forwards. Stop the engine and remove
the starter key.
!
!
WARNING
NEVER position yourself or any part of your body under a
raised machine which is not properly supported. If the
machine moves unexpectedly you could become
trapped and suffer serious injury or be killed.
INT-3-3-7
2
Check the Tension
Measure gap
A
in line with the third roller from the front
and between the lower surface of the track frame and
the upper surface of the shoe. The dimension should be
275-295 mm for hard ground conditons. For operation
on soft sand or sticky mud it should be 320-340mm.
3
Adjust the Track Tension
Adjustment is made by either injecting or releasing
grease from the check valve
B
. Inject grease to reduce
the gap (increase the tension) or open to release grease
and increase the gap.
!
WARNING
When opening the check valve always stand to one side
and loosen a little at a time until grease starts to come
out. If you over-loosen too much grease could spurt out
or the valve cover fly out and cause serious injury.
8-3-4-5
!
WARNING
Under no circumstances must the check valve be
dismantled or any attempt made to remove the grease
nipple from the check valve
8-3-4-9
If a gap
C
exists between the idler wheel shaft and
the track frame, you may use pressure to apply the
grease.If there is no gap
C
after the application of
grease, then the necessary repairs must be carried out.
Note:
Excessive tension can cause the track rail to wear the
drive rollers and sprocket, insufficient tension can cause
wear to the drive sprocket and track rail.
4
Lower the Track
Remove the blocks from beneath the undercarriage
and lower the track to the ground using the boom and
dipper controls.
5
Repeat for the Opposite Track
Slew the boom round to the other side and repeat steps
1
to
4
above.
Section 3
Routine Maintenance
9803/6410
Section 3
7 - 2
Issue 1
Tracks and Running Gear (continued)
Summary of Contents for JS130
Page 65: ...Section 3 Section 3 9803 6410 Issue 1 9 1 9 1 Routine Maintenance Component Location Diagram...
Page 118: ......
Page 119: ...3 1 Section C Electrics 9803 6410 Section C 3 1 Issue 1 Layout Operator s Cab...
Page 142: ...5 3 Section C Electrics 9803 6410 Section C 5 3 Issue 1 Pump Control FLOW CHART...
Page 207: ......
Page 209: ......
Page 210: ...3 4 Section E Hydraulics 9803 6410 Section E 3 4 Issue 2 Schematics Shuttle Block...
Page 532: ...Contents Page No Technical Data 1 1 i Engine 9803 6410 i Issue 1 Section K Section K...