MacDon M150 SP - Manual (Page 136)

MAINTENANCE AND SERVICING
Form 169017 / 169087 / 169095
134
Revision C
b. Remove the eight screws (H) that attach the cover
(J), and remove the cover.
WARNING
To avoid cuts from evaporator fins, do not
use bare hands to brush away clogs.
c. Use a vacuum or compressed air to remove dirt
from inside the unit.
d. Blow compressed air through the evaporator fins
from the blower side first as shown. Direct the air
straight into the evaporator to prevent fin damage.
A nozzle extension would make this procedure
easier.
e. Repeat the previous step from the side opposite
the blowers.
f. If dirt is still present, soak evaporator in water to
loosen dirt, and then blow out with compressed
air.
g. Straighten any bent fins.
h. Reposition cover (J), and attach with eight screws
(H).
i. Re-attach drain hoses to drain tubes, and secure
with hose clamps (G).
7.7.6.5 A/C Compressor Protection
The compressor is protected from excessively low
and high pressures by two switches that shutdown
the compressor to prevent damage to the system.
These switches do not require any regular
servicing or maintenance, so if problems occur
and the switches are suspect, contact your
MacDon Dealer.
If the compressor cycles rapidly due to rapid
pressure changes, the CDM displays a warning
“CHECK A/C SYSTEM”. Contact your Dealer.
7.7.6.6 Refrigerant and Oil
IMPORTANT
Perform the following steps whenever the
machine is first started after storage for
more than one week:
1. Turn blower switch to first position, turn
temperature control switch to maximum
heating, and A/C control to “OFF”.
2. Start engine, and operate at low idle until
engine is warm.
3. Click A/C switch from "OFF" to "ON" for one
second, then back to "OFF" for 5 to 10
seconds. Repeat this step ten times.
OUTSIDE AIR SWITCH
Controls Air Source
Fresh Air - Starts Booster Fan and
Filtered Outside Air Drawn Into Cab.
Recirculate - Stops Booster Fan and
Cab Air Is Recirculated.
AIR CONDITIONING SWITCH
Controls A/C System
OFF - A/C Does Not Operate.
ON - A/C Operates With Blower
Switch On.
TEMPERATURE CONTROL
Controls Cab Temperature
Clockwise to Increase.
Counter Clockwise to Decrease.
BLOWER SWITCH
Controls Blower Speed
OFF / LO / MEDIUM / HI
AIR AIR
AIR AIR
H
J