Terex TS14G, Руководство по обслуживанию

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Section 260-0130
SM 1787 Rev1 03-04
9
Operators Compartment - Air Conditioning
1. Position the vehicle in a level work area, apply the
parking brake and switch off the engine. Operate the
steering in both directions several times to relieve any
pressure in the steering system.
2. Block all road wheels and place the battery master
switch in the 'Off' position.
3. If necessary, remove hood assembly and side panel
from vehicle to gain access to air conditioning
components. Refer to Section 100-0010, CHASSIS,
HOOD AND FENDERS.
4. Tighten down (turn clockwise) both high and low side
valves on the gauge manifold to the closed position.
Remove protective caps from the service ports on the
compressor.
5. Connect both service hoses from the two fittings in the
bottom of the manifold to the two service ports on the
compressor. High side (red) to compressor discharge
valve, low side (blue) to compressor suction valve, and
centre service hose (yellow) vented to a suitable canister
(canister on charging station).
6. Open the low side hand valve on the manifold very
slowly. Watch the centre service hose for evidence of
any refrigerant oil in the canister. Carefully adjust low
side hand valve to prevent oil from escaping.
7. When the high side manifold gauge reading moves
below 3.5 bar (50 lbf/in
2 ), open high side hand valve
very slowly. The refrigerant should flow at a fairly even
rate from both high and low sides of the system. As
necessary, continue to monitor the hand valves to
prevent any oil leakage.
8. When 0 bar (0 lbf/in 2 ) is reached on both gauges,
close both hand valves. The system should now be
completely discharged and may be opened for service.
9. If removed, install hood assembly and side panel to
vehicle. Refer to Section 100-0010, CHASSIS, HOOD
AND FENDERS.
10. Remove wheel blocks.
CHARGING THE SYSTEM
Note: Refer to all WARNINGS listed under
'Maintenance' prior to charging the system.
Recommended Equipment Required:
Portable High Vacuum Charging Station
Halogen Leak Detector
For New Or Completely Empty System
Note:
The charging procedure must be done in ambient
temperatures above 15.5° C (60° F) with the R-134a
canister temperature equal to the outside ambient
temperature.
1. Shut off engine and block all road wheels.
2. If necessary, remove hood assembly and side panel
from vehicle to gain access to air conditioning
components. Refer to Section 100-0010, CHASSIS,
HOOD AND FENDERS.
3. Remove protective caps from 'Schraeder' valves on
rear of compressor.
4. Connect low pressure gauge hose (blue hose and
gauge) to suction side or low side fitting on
compressor. The suction side can be identified by the
size of the hose connected to the fitting. This will be
the largest diameter hose of the system.
5. Connect the high pressure gauge hose (red hose and
gauge) to discharge or high side fitting on compressor.
6. Connect yellow supply hose to suction port on
vacuum pump.
7. Open both sides of gauges, low and high, completely.
8. Start vacuum pump to evacuate the complete air
conditioning system.
9. Run vacuum pump for approximately 30 minutes.
Ideal gauge readings should be 29.92 inches of
mercury. The pressure will vary with altitude; it will be
approximately 0.03 bar (0.5 lbf/in²) less for each 305 m
(1 000 ft) of elevation.
10. Before disconnecting power supply from vacuum
pump, close both high and low side gauges. Remove
yellow hose from vacuum pump and connect to
R-134a source.
11. Open R-134a source. Loosen, but do not remove,
yellow supply hose at manifold on gauges to remove all
air in the yellow supply hose, replacing the air with R-
134a. This is done in a few seconds. Tighten yellow
supply hose.
12. Open low side of R-134a gauges slowly. When
gauge reads zero open both sides completely. Vacuum
in the system will draw R-134a gas into the system.
Hold until both gauge readings equalize.
Courtesy of Machine.Market