Expansion Valve - Toyota Celica Supra 1986 Service And Repair Manual

AIR CONDITIONING SYSTEM - Refrigerant Lines, Expansion Valve AC-41
Charging Hote
To RefrigemK>n
Svstem
«f1
I
;;r
To Manifold
f
Gau90 To Compressor
""'"'
REPLACEMENT OF REFRIGERANT LINES
1. DISCHARGE REFRIGERATION SYSTEM
(See - AC·12)
2. REPLACE FAUL TV TUBE OR HOSE
NOTE: Cap the open fittings immediately to keep mois·
ture out of the system.
Tightening torques for the O·ring fittings.
Fining size
Torque
0. 31
in. tube for
liquid lint
13Skg-c:m
110 ft·lb, t3 N•m)
0.50 in. tube
tor
dis.ch¥gt
lint 225 kll'<m
116
It·
lb. 22 N·ml
0.61 in.
tut>t
for suction line
325 kg.cm
(24 It-lb. 32 N·ml
3 . EVACUATE, CHARGE AND TEST REFRIGERATION
SYSTEM
(See
page AC·12)
EXPANSION VALVE
ON-VEHICLE INSPECTION
1. CHECK QUANTITY OF GAS DURING REFRIGE·
RATION CYCLE
2 . INSTALL MAN IFOLD GAUGE SET
(a) Close the high pressure and low pressure valves.
(b) Connect the high pressure hose to the discharge
service valve of the compressor.
(c) Connect the low pressure hose to the suction "'rvice
valve of the compressor.
3 . RUN ENGINE
Run the engine at 2,000 rpm lor at least 5 minutes.
Then check that the high pressure reading is 13 - 15
kg/em' (1 85 - 213 psi, 1,275- 1,471 kPa).
4. CHECK EXPANSION VALVE
If the expansion valve is faulty, the low pressure reading
L-- - - - - -- -----=-=';J '
will drop to 0 kg/em'. (0 psi, 0 kPa), otherwise it Is OK .
NOTE: When the low pnessure drops to 0 kg/em' (0 psi,
0 kPa). feel the receiver's IN and OUT sides for no tem·
perature difference.