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MAINTENANCE
SERVICE PROCEDURE
CHECK WEAR OF FRONT DISC BRAKE PADS
WARNING
If the pad is cotinued to use after the period of wear limit, not only the disk will be damaged but also the brake will loose its
effect, and it is dangerous. If the period of wear limit approaches, check frequently the condition to change the pad at proper
time.
Perform inspection every 250 hours if the work site is covered by lots of earth and sand and if it is at the location where the foot
brake is frequently used.
Measure the thickness of pad, and if the thickness is less, than 3
mm (0.12 in), please contact your Komatsu distributor for
replacement.
The pad wear is not necessarily the same for the left and right
wheels, so always check the pads on both the left and right. If any
of the pads has reached the wear limit, always replace all 4 pads.
If the work is performed on the muddy and watery ground, the mud
sticks to caliper or disc. Leaving the mud will increase the wear of
pad, so wash out thoroughly with water.
CLEAN, CHECK RADIATOR FINS
WARNING
If compressed air scattered around dust and debris, there is danger of injury. Always wear protective equipment such as
protective glasses and mask.
If the radiator fins become clogged or bent, this may cause overheating of the engine, so always clean or carry out
inspection and take the necessary actions.
Cleaning can be carried out by using jets of air, steam, or water,
but be careful not to let the nozzle contact the fin.
Air pressure : Max. 0.98 MPa (10 kgf/cm
2
, 142 PSI)
Steam pressure : Max. 0.39 MPa (4 kgf/cm
2
, 56.8 PSI)
When using compressed air or steam, keep the nozzle at 90
degrees to the radiator.
Examine the rubber hose, and if any cracks or brittle places are
found, replace the hose. In addition, check also for loose hose
clamps.
CHECK FAN BELT FOR WEAR AND REPLACE
Since inspection and replacement of the fan belt requires special tools, contact your Komatsu distributor.
The machine is equipped with an auto-tensioner, so there is no need to carry out any adjustment until the belt is
replaced.
For details of replacing the fan belt, see REPLACE FAN BELT, ADJUST AUTO TENSIONER (PAGE 4-32).
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