0585081 JOHNSON RECTIFIER ASSY.

3. Disconnect hoses (1) from pump (3).4. Remove two bolts (2) and remove the hydraulic oil pump.Install Hydraulic Oil Pump
1. Put hydraulic oil pump (1) in position and install the two bolts that hold it. 2. Connect hoses (2).3. Install the engine side guard.4. Fill the hydraulic oil tank with hydraulic oil to the correct level. See MAINTENANCE GUIDE.Disassemble Hydraulic Oil Pump
START BY:a) remove hydraulic oil pump1. Remove the O-ring seal from the pump. 2. Remove bolt (1), lock (2) that hold gear (3) to the shaft. Remove the gear. Put marks on the pump body and flange so the pump will be assembled correctly. Put identification on the pressure plates and pump gears so they will be installed in their original position. 3. Remove bolts (4) that hold flange (5) to the pump. Remove the flange. 4. Remove seals (7) and spacer (6) from the flange. 5. Remove aluminum isolation plate (8), backup ring (10), sealing strip (11) and white plastic retainer (9) from the pump body. 6. Remove pressure plate (12). 7. Remove drive gear (13) and idler gear (14) from the pump body. During the first run operation (break-in) at the factory the gears cut into the body. The normal depth of the cut is 0.20 mm (.008 in.) and must not be greater than 0.38 mm (.015 in.). As the gears cut into the body metal is moved against the edges of the pressure plates. Use the procedure that follows to remove the pressure plates from the bottom of the pump bodies. 8. Use a knife to remove the metal (15) that was moved against the top pressure plate. Use the point of the knife to remove the metal (15) from around the outside diameter of bottom pressure plate (16). Do not put scratches in the pressure plate. Use air under pressure to remove any loose chips so the removal of pressure plate (16) will be easier. Do not remove the groove caused by the first run operation (break-in). Grind the short end of an allen wrench to a flat taper. Install the allen wrench in the shaft bore and lift pressure plate (16). Move the allen wrench from one bore to the other until the pressure plate is loosened. With fingers in the bores of the pressure plate lift the pressure plate straight out. Use extra caution during the removal of the pressure plate. Do not use force. 9. Remove isolation plate (19), backup ring (17), sealing strip (18) and retainer (20). For information on hydraulic pump failures see DIAGNOSTIC TYRONE GEAR PUMP FAILURES, Form No. FEG45137. For information on parts reusability see GUIDELINE FOR REUSABLE PARTS, WEAR SLEEVES FOR SHAFTS, Form No. SEBF8020 and SPECIAL INSTRUCTION, INSTALLATION OF WEAR SLEEVES FOR REPAIR OF GROOVE WEAR CAUSED BY LIP TYPE SEALS, Form No. SMHS6915.Assemble Hydraulic Oil Pump
Make sure all the parts of the pump are clean and free of dirt and foreign material. Also put clean oil on all pump parts before assembly. The rotation of the pump is clockwise as seen from the drive end of the pump:1. Inspect all of the parts of the housing of the pump. Check the bores in the housing for wear. Measure the depth of the groove in each bore. If the groove is deeper than 0.38 mm (.015 in.), a replacement of the housing and gears must be made.
Two isolation plates are needed for each housing. The isolation plate that is installed in the bottom of the pump housing must have a radius along its outer edge which must be toward the bottom when installed. The isolation plate with the straight (square) edges along the radius go on top, next to the housing or flange. The isolation plates in later pumps will all have straight (square) edges.
2. Install isolation plate (2) with the radius on the plate toward the bottom and the isolation plate next to the inlet side of the pump.3. Install backup ring (3), sealing strip (1) and retainer (4). The radius along the edge of the retainer must be toward the bottom of the housing.
Do not use force to install the pressure plates. Hold the plates as level as possible and slide them into position. To prevent damage to the pressure plate do not let the pump gears fall into position in the pump housing.
4. Install pressure plate (5) in the housing. The bronze side of the pressure plate must be toward the gears and the machined notch must be toward outlet side (6) of the pump. 5. Carefully install drive gear (7) and idler gear (8) into position in the pump housing as shown. Opening (6) is the outlet side of the pump. 6. Install pressure plate (10) on the gears with the wrong side of the pressure plate toward the gears and machined notch (trap slot) (9) toward the pump outlet (6) as shown. 7. Install isolation plate (13) next to the pump inlet. Install backup ring (11), sealing strip (12) and retainer (14) in the pump body. 8. Use tool (A) to install the inner seal in the flange with lip of seal as shown. Be sure the drain hole between the seals is open after the seal is installed. Install spacer (15) with the flat side down. Use tool (A) to install outer seal with the lip as shown. Be sure the seals are installed straight (square) in the bore. 9. Install O-ring seal (17) in flange (18).10. Install flange (18) in its original position on pump body (16). Install the bolts that hold the flange to the pump body and tighten to a torque of 85 5 lb.ft. (115 7 N m). 11. Put gear (21) in position on the shaft. Install lock (20) and bolt (19) that hold the gear in place.12. Install the O-ring seal on the face of the flange.END BY:a) install hydraulic oil pump