MacDon M1240, Operator'S Manual

Page: 327 / 488

MAINTENANCE AND SERVICING
1. Use a vacuum cleaner or compressed air to remove
dirt from inside the unit.
2. Blow compressed air through the evaporator fi ns from
the blower side (A) fi rst as shown. Direct the air straight
into the evaporator to prevent fi n damage. A nozzle
extension makes this procedure easier.
3. Repeat the previous step from the side (B) opposite the
blowers.
Figure 5.128: A/C Evaporator Core
4. If you can’t feel the compressed air blowing through the
evaporator core, proceed as follows:
a. Protect the blower motor (A) from water.
b. Soak the evaporator core (B) with warm water
using a low pressure hose. Let soak for several
minutes.
c. Blow compressed air through the core from the
blower side (C).
d. Repeat the soaking procedure until air blows
through the evaporator freely.
Figure 5.129: HVAC System
Installing Air Conditioning (A/C) Cover
1. Straighten any bent fi ns.
2. Position cover (B) and attach with eight screws (A).
Figure 5.130: HVAC System
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Revision A