Chrysler DODGE D150 1993 Service Manual page 1458

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HEATING AND AIR CONDITIONING 24 - 21
(a) Loosen both test hoses at t h e manifold gauge
set. Tighten the hoses as soon as the air is purged.
(b) Loosen charging hose connection at manifold
gauge set. This will purge air from the charging
hose. Tighten connection as soon as air is purged.
(9) With vehicle windows open and hood up, oper­
ate engine at 1,300 RPM.
(10) Place air conditioner control on A/C and place
the fan switch on high.
(11) If necessary, block the condenser to maintain
a discharge pressure of 1 550-1 725 kPag (225-250
psig). System must be charged through the evapora­
tor suction service ports as follows:
(a) Slowly open the suction service gauge valve.
Meter flow of refrigerant by adjusting the suction
service gauge valve so the pressure registered at
the suction service gauge does not exceed 345 kPag
COMPRESSOR J
(50 psig). Keep refrigerant container upright.
(b) Add refrigerant gas until there is no foam visi­
ble at the sight glass. As soon as all foam clears, note
the weight registered on the refrigerant scale.
(c) Watch the refrigerant weighing scale and add
437 g (14 oz.) of refrigerant (equivalent to 1 can).
(d) Close t h e suction gauge valve.
CAUTION:
T O O much refrigerant in the system can
cause abnormally high discharge pressures. Care
must be used s o the exact recommended amount of
refrigerant is added after foam clears in the sight
glass.
(e) Close dispensing manifold valve. Remove test
hoses and adapters from the service ports of com­
pressor and install protective caps at service ports.
R V I C E ( S D - 7 0 9 )
INDEX
page
Compressor 21
Compressor Shaft Seal . . . . . . . . . . . . . . . . . . . . 25
The A/C system uses a 7 piston design Sanden SD-
709 compressor. Designated t h e SD-709, the compres­
sor is mounted on the front right side of the engine
and is driven by a serpentine belt.
System lubrication is provided by 135cc ±15cc (4.6
cu. in. ±0.5 cu. in.) of 500 viscosity refrigerant oil.
The clutch used on the compressor consists of 3 ba­
sic components:
(1) The pulley.
(2) The front plate.
(3) The field coil.
The pulley and field coil are attached to the front
head of the compressor with snap rings. The hub is
keyed to the compressor shaft and is retained on the
shaft with a self-locking nut. Special service tools are
required to remove and install t h e clutch plate on
the compressor shaft.
COMPRESSOR
REMOVAL
(1) Disconnect t h e negative cable from the battery.
(2) Disconnect the clutch lead wire.
(3) Remove the discharge and inlet (suction) ser­
vice valves from the compressor. Plug or tape all the
openings.
(4) Refer to Group 7, Cooling System and remove
the drive belt(s).
(5) Remove the bolts and lift the compressor from
the mounting bracket (Fig. 1).
page
Cylinder Head / Valve Plate 27
Magnetic Clutch 2 2
Fig. 1 Compressor Mounting
INSTALLATION
If a replacement compressor is being installed,
check the oil level. Add or subtract oil as necessary.
Install the magnetic clutch on the compressor.
(1) Install the compressor on the mounting bracket.
Tighten the bolts to 27 N*m (20 ft. lbs.) torque.
(2) Refer to Group 7, Cooling System and install
the drive belt(s).
(3) Check the belt tension.
@ New drive b e l t - 8 0 0 - 9 0 0 N (180-200 lbs-f).
• Used b e l t - 6 2 3 - 7 1 2 N (140-160 lbs-f).