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 Page 29