Terex TR60 Maintenance Manual page 494

Operators Compartment - Air Conditioning
Section 260-0130
8. Inspect and clean outside and inside cab air filters
periodically, depending on dust conditions. Replace
the outside filter when it becomes saturated to the
point it won't come clean.
Maintenance of 'V' belt Drives
1. Listen for 'ticking' sound - they mean interference
with the belts. Visually inspect for bent or damaged
belt guards.
2. Replace all belts in a mismatched set at one time to
ensure even load distribution.
3. Periodically check tension and keep belts tight.
- The ideal tension is the lowest tension at which the
belt will not slip under peak load conditions.
- Check belt tension frequently during the first 24 - 48
hours of run-in operation.
- Initial belt tension should be 445 N (100 lbf)
dropping to 334 N (75 lbf) after the first 48 hours.
- There should be a freeplay of 10 mm in the 'V' belt.
- Do not over tension belts.
- Keep belts free from foreign material that may
cause slippage.
- Inspect the V-drive periodically. Re-tension belts if
they are slipping.
- Maintain sheave alignment with a strong straight
edge tool while tensioning belts.
4. Never attempt to correct belt slippage by using a
belt dressing. The dressing may cause softening and
deterioration.
5. If belt slips, even when properly tensioned, check
for overload, worn sheave grooves or oil or grease on
the belts.
6. Never pry a 'V' belt or force it into the sheave
groove. Loosen the 'V' belt tightener prior to
installation.
7. A belt that has operated while rolled over in the
sheave groove may be damaged - replace it.
8. Store belts in a cool, dry place. If stored on a
machine, relieve all belt tension by loosening the
'V' belt tightener.
9. Never attempt to check or adjust belts while they
are running.
8
Refrigerant Oil
WARNINGS
To prevent personal injury always wear rubber
gloves when handling refrigerant oils.
Too much refrigerant oil will dampen the
cooling effect and too little refrigerant oil may
lead to compressor failure. If in doubt flush
the system.
Oil is required to lubricate the compressor. The oil
mixes with the refrigerant and is carried around the
system. The compressor and receiver drier are
supplied with an oil charge.
Compressor 4.75 fl oz (135 ml)
Receiver Drier 2 fl oz (60 ml)
However, if any component is replaced the following
amount of oil should be added to the system;
Condenser add 1 fl oz (30 ml)
Evaporator add 1.5 fl oz (40 ml)
The oil should be added to the oil filling port of the
compressor before the recovery procedure is started
or by using an oil injector when the system is being
charged, observing the following good practises:
a. Only pour the amount required from the container
straight into a CLEAN measuring jug and
immediately pour the oil into the compressor.
b. Re-cap container tightly as soon as the required
amount has been taken (never leave an oil container
open).
c. Do not mix different oils.
Only new oil should be used, because oil that has
been exposed to the air will have absorbed water
(hygroscopic).
Use only refrigerant oil as specified in Section
300-0020, LUBRICATION SYSTEM.
System Leak Testing
Recommended Equipment Required:
Electronic Leak Detector
Switch off the engine and check all connections
SM 1620 Rev 1 1-00