refrigerant type ISUZU TF SERIES 2004 Workshop Manual

1-16 HEATER AND AIR CONDITIONING
RECEIVER/DRIER

Capacity cc (cu in) 250 (15.3 cu in)
Assembly includes sight glass
and pressure sensitive device
(Dual pressure switch)
*Low pressure control
OFF: 18
3 (1.8
0.25kg/cm
2 G)
ON: 193 (1.90.3kg/cm2 G)
*High pressure control
OFF: 275
20N
m (28
0.2kg/cm
2 G)
ON: 59
20N
m (6
2kg/cm2 G)

REFRIGERANT
Type: HFC-134a Capacity: 0.65 kg (1.43 lbs.)

IDLE SPEED-UP CONTROL
Idle speed controlled by solenoid switch

HEATER AND AIR CONDITIONING 1-47

Checking and Adjusting for Used Compressor
(1) Perform Oil return operation.
(Refer to "Oil Return Operation" in this section.)
(2) Discharge refrigerant and remove the compressor.


(3) Drain the compressor oil and measure the extracted oil with
a measuring cylinder.
(4) Check the compressor oil for contamination.
(Refer to "Contamination of Compressor Oil" in this
section.)
(5) Adjust oil level following the procedure below.

Type Collected Amount Charging Amount
more than 90 cm3
(3.0 fl.oz.) same as collected
amount
less than 90 cm3
(3.0 fl.oz.) 90 cm3 (3.0 fl.oz.) CR-14

(6) Install the compressor, then evacuate, charge and perform
oil return operation.
(7) Check system operation.


When it is impossible to perform oil return operation, the
compressor oil should be checked in the following order:
(1) Discharge refrigerant and remove the compressor.
(2) Drain the compressor oil and measure the extracted oil with
a measuring cylinder.
(3) Check the oil for contamination.
(4) If more than 90 cm
3 (3.0 fl.oz.) for CR-14 type is extracted
from the compressor, supply same amount of oil to the
compressor to be installed.
If the amount of oil extracted is less than 90 cm
3 (3.0 fl.oz.)
for CR-14 type recheck the compressor oil in the following
order:
(5) Supply 90 cm
3 (3.0 fl.oz.) for CR-14 type oil to the
compressor and install it onto the vehicle.
(6) Perform oil return operation.
(7) Remove the compressor and recheck the amount of oil.
(8) Adjust the compressor oil.