Maintenance
50940411/G0219 160 Printed in U.S.A.
Air Conditioning Maintenance
Test air conditioning function weekly. Reduced air
conditioning function could indicate a low
refrigerant level. Low refrigerant or refrigerant leaks
can cause air conditioning compressor overheating
and failure.
IMPORTANT:
Air conditioning system servicing
should only be performed by trained, properly certi-
fied and licensed technicians and service centers.
Air Conditioning Filters
Check the condition of the air conditioning filters
every 250 hours of use and replace if necessary.
NOTE:
Extreme or dusty/dirty conditions may
require more frequent maintenance.
Cab Air Filter
1. Slide the operator’s seat as far forward as it will
go to provide access to the cab wall behind the
seat.
2. Remove fasteners (A, Fig. 176) securing filter
grilles (S) to the cab wall. Remove and discard
the old filter elements.
3. Insert new filter elements and secure with grilles
(S) and fasteners (A). Make sure the filter
elements are completely seated in the openings
and the grilles are firmly seated flush to the cab
wall.
Outside Air Intake Filter
1. Perform the “Mandatory Safety Shutdown Pro-
cedure” on page 20.
2. Remove hardware (F, Fig. 177) securing the
outside air filter cover (G). Remove cover (G).
3. Remove old air filter (H).
4. Install new air filter (H), positioned so the side
with the metal grate (Z) faces in.
5. If necessary, apply foam strips (I) to the outside
edges of new air filter to provide a good seal.
6. Replace cover (H) and secure with hardware (F).
Fig. 176 – Cab Air Filters
S
A
A
A
A
Fig. 177 – Air Conditioning Outside Air Intake
Filter
F
G
H
I
Z
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