Doosan DX700LC Operation And Maintenance Manual page 225

Check and Clean Air-Conditioning Inner
Filter
All service and inspection of air-conditioning system
should be performed with the starter switch in the "O"
(OFF) position.
If using compressed air to clean the element, make sure
that proper eye protection is worn.
1. Remove the filter by pulling out ward the knob while
pressing the upper part and lower part of the filter handle
which is inside of the left rear part of the cabin.
2. Use compressed air in the clean filter. If the filter is
damaged replaced by a new one.
If the filter is very dirty use a mild soap or detergent and
water to clean it.
IMPORTANT
If water was used to clean filter, be certain it is
completely dry before installing.
Inspection, Maintenance and Adjustment
WARNING
WARNING
Figure 56
FG000422
OP001123
4-37