Terex TS14G, Руководство по обслуживанию

Страница: 322 / 376

Section 260-0130
Operators Compartment - Air Conditioning
SM 1787 Rev1 03-04
8
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.
System Leak Testing
Recommended Equipment Required:
Halogen Leak Detector
Switch off the engine and check all connections
throughout the system for leaks. A large leak point will
have an oily or greasy appearance. The refrigerant
carries compressor oil with it and deposits it around the
leak area. Check all such points for loose connections
and tighten.
Using a suitable leak detector, search for leaks around
all joints, connections, seals and control devices. If a
leak is located, purge the system of refrigerant and
repair. Fully evacuate and charge the system to make
it operational.
DISCHARGING THE SYSTEM
Note:
Refer to all WARNINGS listed under
'Maintenance' prior to discharging the system.
Recommended Equipment Required:
Portable High Vacuum Charging Station
Suitable Canister
To eliminate system contaminants from an air
conditioning system requires discharging the entire
system. This means removing all of the refrigerant and
cleansing all contamination (air and moisture) from the
system components. If any of the major system
components are to be repaired or replaced, the system
must also be completely discharged.
WARNING
The vehicle must not be running during this
procedure. Be sure to have adequate ventilation
during this operation. Do not discharge
refrigerant near an open flame.
4. Ensure all hoses and hose clamps are free from
contact with sharp metal, moving parts or near to
manifolds.
5. Inspect condensation drain lines for debris, sharp
bends or breaks.
6. Inspect the clutch wire from the thermostat for bare
spots.
7. Inspect bolts and nuts on the compressor and
mounting bracket for proper tightness.
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.
Courtesy of Machine.Market