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13Table 6 — Torque ValuesLubrication SystemTESTING OIL PUMP — An oil pressure tap is located aboveoil pump cover plate (Fig. 12). Oil pressure should be 12 to18 psi above suction pressure.Oil Filter Screen — Screen is accessible through bottom coverplate. Remove and inspect strainer for holes and dirt. Clean itwith solvent and replace.OIL PUMP AND BEARING HEAD — The oil pump assem-bly is contained in the pump end bearing head aluminumcasting. (The pump end main bearing is a machined part of thiscasing — no insert bearing.)Remove Bearing Head — Remove bearing head from crank-case and disassemble oil pump. Drive segment cap screwsmust be removed before bearing head can be removed(Fig. 12). Remove pump vane assemblies from both sides ofthe bearing head by pushing against the bearing side of therotor. Check all parts (Fig. 13) for wear and damage.Replace Bearing Head1. Install the rotor retaining ring in the ring groove of thepump rotor with chamfered edge toward compressor.Compress retaining ring, and insert pump rotor intobearing head.2. Place the pump vanes, pump vane spring with guides, andsnap rings into the bearing head. Compress the springsand force the snap rings into their grooves. (Insert snaprings with flat side against casting.)3. Bolt bearing head to crankcase (use 55 to 65 lb-ft torque).Bolt drive segment to crankshaft.4. Insert the oil feed guide vane with large diameter inward.Place oil feed guide vane spring over small diameter ofguide vane.5. Install pump cover plate.SIZEDIAM(in.)THREADSPER IN.TORQUERANGE(lb-ft)USAGE1 /16 27 (pipe) 8-12 Pipe Plug — Crankshaft1 / 4 18 (pipe) 20-25 Pipe Plug — Crankcase1 / 4 20 8-10 Conn. Rod Cap Screw8-12 Junction Box1 / 4 283-5 Sight Glass14-18 Oil Pump Drive Segment14-18 Unloader Valve14-18 Discharge Valve Stop12-15 Head Gasket Positioning Screw5 /16 18 (pipe) 15-24 Cover Plate — Pump End BearingHead15-24 Discharge Service Valve (4 cyl)3 / 8 1630-40 Bottom Plate — Crankcase30-40 Compressor Foot30-40 Terminal Plate25-30 Oil Plug — Pump End Bearing Head2-4 Terminal Bolts3 / 8 18 (pipe) 30-40 Pipe Plug — Junction Box7 /16 14 55-65 Motor End Cover55-65 Pump End Bearing Head1 / 2 1390-100 Cylinder Head90-120 Discharge Service Valve (6 cyl)90-120 Suction Service Valve (4 cyl)5 / 8 11 90-120 Suction Service Valve (6 cyl)90-120 Rotor Lock — Crankshaft5 / 8 18 60-75 Oil Drain Plug3 / 4 16 105 Stator LockNo. 6 32 1-2 Check Valve Body — CrankcaseNo. 10 32 4-6 Oil Pump Drive Segment4-6 Terminal Screw12345REMOVE 8 CAPSCREWSDRIVE SEGMENTCAP SCREWS OIL FEED GUIDE VANEAND SPRINGOILPRESSURETAPPUMP ENDBEARING HEADCOVERPLATEFig. 12 — Removing Pump End Bearing HeadLEGENDFig. 13 — Pump End Bearing Head Assembly1 — Pump End Bearing Head2 — Drive Segment3 — Oil Feed Guide Vane4 — Oil Feed Guide Vane Spring5 — Cover Plate PreviousNext |