Komatsu GD555-5 Operation & Maintenance Manual page 275

SERVICE PROCEDURE
CHECK INCHING PEDAL
If any of the following problems have occurred, please contact your Komatsu distributor for inspection and
adjustment.
If the machine does not stop even the inching pedal is depressed.
If the machine does not move or lacks power even the inching pedal is released.
CLEAN AIR CONDITIONER AIR FILTER
If the recirculation air filter at the suction port of the air conditioner unit or the fresh air filter at the external air suction
port become clogged, the heating or cooling performance will drop, so clean the filter.
1. Remove the cover (1) at the bottom of the operator's
compartment.
2. Pull out recirculation air filter (2) and clean it with a weak jet of
compressed air.
3. Remove cover (3) at the rear of the cab.
4. Remove fresh air filter (4).
5. Use a weak jet of compressed air to remove the dust stuck to
the fresh air filter (4).
REMARK
The fresh air filter must face to a certain direction. Install it so that
the thicker side faces indoors as shown in the right figure.
If there is oil on the filter, or if the filter is extremely dirty, wash it in a neutral agent. After rinsing it in water, dry it
thoroughly before using it again.
Replace the filter with a new part every year. If the clogging of the filter cannot be removed by blowing with air or
washing in water, replace the filter immediately.
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MAINTENANCE