Zoomlion RT75, Operator'S Manual

Page: 63 / 178

06 - 8
RT75 Rough Terrain Crane
Examine the condition and tension of the compressor belt at a regular
interval. If necessary, adjust the tension on the belt.
You must clean the condenser at a regular interval.
You must use the same type of refrigerant and compressor oil to
complete the repairs on the A/C.
Set the FAN mode to HI when you first start to cool the cab.
Do not use the parts to repair the A/C system that are not approved by
the manufacturer.
When you use the A/C function where it is cool and has a high level of
humidity, examine the evaporator at a regular interval. In these
conditions, the evaporator freezes and causes a blockage for the air
that goes through it.
If you operate the crane in a cold area or in the winter season, set the
A/C system to ON for 10 minutes each month.
Make sure that the A/C is in the OFF mode when the engine is OFF or at
idle speed for a long time. The battery drains in these conditions.
When you move the crane a long distance at low speed, with the A/C in
the ON mode, put the transmission in a low gear. This increases the
engine RPM and decreases the load on the transmission.
Set the A/C to the OFF position when you do one of the items that
follow:

Move the crane quickly.

Move up a long hill slope.
Make sure that the refrigerant in the A/C system is at the correct level at
regular intervals.
If there are unusual vibrations, noises or smells during operation, stop
and examine the crane immediately. Do not operate the crane that has a
malfunction.
Keep the surface of the condenser clean. When you clean the
condenser, do not use steam.
Before you disassemble the A/C system, correctly remove the
refrigerant.
Do not disassemble the A/C system in an area with high humidity.