S-SERIES AIR CONDITIONING - HEATER SYSTEM
TORQUE CHART
All refrigerant fittings must be lubricated with refrigerant oil prior to tightening. Do not exceed specified torque. Use two
wrenches where applicable.
TORQUE
THREAD SIZE
N•m
FT.-LB.
Condenser Inlet
3/4"-16
30-35
(22-26)
Condenser Outlet
5/8"-18
20-26
(15-19)
Filter-Dehydrator Inlet
11/16"-16
15-20
(11-15)
Filter-Dehydrator Outlet
5/8"-18
15-20
(11-15)
Compressor Suction Line
1"-14
54-60
(40-44)
Compressor Discharge Line
1"-14
54-60
(40-44)
Fan Drive Override Switch
7/16"-20
9-15
(7-11)
Refrigerant Supply Line to Heater-A/C
(Evaporator) Unit
5/8"-18
20-26
(15-19)
Refrigerant Return Line from Heater-A/C
(Evaporator) Unit
1-1/16"-14
89-95
(66-70)
Expansion Valve Inlet
5/8"-18
20-27
(15-20)
Expansion Valve Outlet
3/4"-16
20-27
(15-20)
Expansion Valve Equalizer Line
7/16"-24
14-20
(10-15)
Low Pressure Switch
7/16"-20
9.5-20
(7-15)
Heater-Evaporator-Blower Unit Mounting
Nuts
1/4"-20
8-11
(6-8)
Condenser Mounting Bolts
5/16"-18
15-19
(11-14)
Filter-Dehydrator Mounting Clamp
5/16"-18
15-19
(11-14)
Clutch Retainer Bolt
5/16"-24
20-27
(15-20)
Compressor Oil Level Plug
------
5-15
(4-11)
Compressor-to-Mounting Bracket Bolts:
w/CAT 3208 Engine
3/8"-16
24-27
(18-20)
All Other Engines
3/8"-16
26-31
(19-23)
Compressor Mounting Bracket-to-Engine
Bolts
3/8"-16
41-51
(30-38)
3/8"-24
41-51
(30-38)
7/16"-14
68-81
(50-60)
1/2"-13
95-115
(70-85)
SPECIAL SERVICE TOOLS
The special service tools and equipment required to
service the S-Series Air Conditioning-Heater System are
the same as those used on IH A/C-Heater Systems in
general. Refer to Section CTS-4194 of the Service
Manual for description and illustrations of special service
tools.
CTS-4066A
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