Disassembly/Inspection and Service Governor Gear Assembly Oil Pump Assembly (Style A) Governor Shaft Press Depth Details Oil Pump (Style A) Torque Sequence 1 2 Oil pump is mounted inside of closure plate. If service is required, continue with Disassembly, Inspection, and Reassembly. Disassembly 1. Remove screws. 2. Remove oil pump assembly from closure plate. 3. Remove oil pump rotor. 4. Remove oil pickup by unhooking locking clip, and pulling it free from oil pump body. 5. If relief valve is similar to shown, drive out pin to remove oil pressure relief valve piston and spring. Refer to following inspection and reassembly procedures.
If relief valve is a one-piece style, staked to oil pump housing removal should not be attempted, nor is internal servicing possible. If a problem with relief valve is encountered, oil pump should be replaced. Inspection Inspect oil pump housing, gear, and rotors for nicks, burrs, wear, or any visible damage. If any parts are worn or damaged, replace oil pump. Inspect oil pressure relief valve piston. It should be free of nicks or burrs. Check spring for wear or distortion. Free length of spring should be approximately 47.4 mm (1.8 in.). Replace spring if it is distorted or worn. Reassembly 1. Install pressure relief valve piston and spring. 2. Install oil pickup to oil pump body.
Lubricate O-ring with oil and make sure it remains in groove as pickup is being installed. 3. Install rotor. 4. Install oil pump body to closure plate and secure with screws. Torque screws as follows: a. Install fastener into screw location 1 and lightly tighten to position pump. b. Install fastener into screw location 2 and fully torque to recommended value. c. Torque fastener in screw location 1 to 10.7 N·m (95 in. lb.) into new holes, or 6.7 N·m (60 in. lb.) into used holes. Governor gear assembly is located inside closure plate. If service is required, refer to these procedures. Inspection Inspect governor gear teeth. Replace gear if it is worn, chipped, or if any teeth are missing.
Inspect governor weights. They should move freely in governor gear. Disassembly NOTE: Governor gear is held onto shaft by small molded tabs in gear. When gear is removed from shaft, these tabs are destroyed and gear must be replaced. Therefore, remove gear only if absolutely necessary. Governor gear must be replaced once it is removed from closure plate. 1. Remove regulating pin and governor gear assembly. 2. Remove locking tab thrust washer located under governor gear assembly. 3. Carefully inspect governor gear shaft and replace it only if it is damaged. After removing damaged shaft, press or lightly tap replacement shaft into closure plate to depth shown. Reassembly 1.
Install locking tab thrust washer on governor gear shaft with tab down. 2. Position regulating pin within governor gear/fl yweight assembly and slide both onto governor shaft. 66 690 01 Rev. C KohlerEngines.com 53 A B C A Gear Shaft B 19.40 mm (0.7638 in.) C 34.0 mm (1.3386 in.) 33.5 mm (1.3189 in.)