SUNWARD SWDM240B - Hydraulic Cylinder Maintenance

SWDM240B OPERATION & MAINTENANCE MANUAL
154
FIG. 7-3-3
①
Idler
②
Cushion spring
③
Tension cylinder
④
Grease nozzle
Tension device includes tension cylinder, cushion spring, idler and grease cup. If the track is too
tight or loose, please refer to below procedures “track tension tightening or loosening” to adjust.
Track tension tightening
1. Wipe out the grease nozzle before adding lubricating grease.
2. Fill lubricating grease through the nozzle till proper track tension is reached.
3. Travel the machine forward to balance the pressure.
4. Check track sag and adjust according to requirements.
Track tension loosening
1. Loosen the pressure relief valve till the track starts to loose, with one circle at most.
2. When track tension is proper, tighten the pressure relief valve according to torque.
3. Travel the machine rearward to balance the pressure.
4. Check track sag and adjust according to requirements.
7.3.2 Hydraulic Cylinder Maintenance
Table 7-3-1 Cylinder Inspection
Cylinders
Qty.
Function
Inspection method
Track extension
cylinder
1
in the chassis frame, it’s
used to extend or retract
the track frame on two
ends.
When extending or retracting
track, oil cylinder should be
operated slowly.
Boom luffing
cylinder
2
Support the parallelogram
in the luffing mechanism
and lift and lower the
luffing by the extension
and retraction
When luffing is operated, two
luffing cylinders should be
operated synchronously.
Drill mast
cylinder
2
Support the drill mast to
move forward or rearward
and adjust the mast
inclination angle laterally.
When operating the drill mast,
two mast cylinders should be
operated slowly. After the
leveling button on the lower