121 S850 Operation & Maintenance Manual
HEATING, VENTILATION AND AIR CONDITIONING
(HVAC) (CONT’D)
Evaporator / Heater Coil (Cont’d)
Later Models (Cont’d)
Figure 185
3. Fasten the two remaining latches (Item 1)
[Figure 185].
NOTE: Perform a thorough visual check to ensure
that the cover and the cover seal are not
deformed. The cover should seal tightly all
around without any gaps.
Lower the operator cab. (See Lowering on Page 114.)
Condenser
The condenser should be cleaned with the oil cooler and
t
he radiator. (See Cleaning (Earlier Models) on Page
130.) or (See Cleaning (Later Models) on Page 132.)
Air Conditioning Lubrication
Run the air conditioning for about five minutes every
w
eek to lubricate the internal components.
Troubleshooting
If the fan does not run, or the air conditioning does not
t
urn on, check the fuse. (See Fuse And Relay Location /
Identification on Page 135.) If the air conditioning system
circulates warm air, the refrigerant may need to be
re
charged.
AIR CLEANER SERVICE
Repl
acing Filter Elements
Figure 186
It is important to change the air filter element only when
nec
essary. The service indicator (Item 1) will FLASH.
Press the information button (Item 3) until the display
screen (Item 2) shows the service codes. Service code
[M0117] (Air Filter Plugged) will show in the display
screen (Item 2) [Figure 186] when air filter change is
necessary.
Replace the inner filter every third time the outer filter is
re
placed or as indicated.
Outer Filter
Remove the rear grille. (See REAR GRILLE on Page
117.)
NOTE: The coolant tank can be raised to facilitate
a
ccess to the air cleaner.
Figure 187
Open the latches (Item 2) and remove the cover (Item 1)
[Figure 187].
Dealer Copy -- Not for Resale