GOV & FUEL INJ PUMP GP 8N4123 - Caterpillar

1. Remove four bolts (1) that hold the oil pump to the engine block.2. Remove the oil pump. Be careful not to drop the oil pump drive gear.Install Oil Pump
1. Put the oil pump in position on the engine and install the bolts and washers. Make sure the idler gear teeth are correctly engaged with the crankshaft gear. The timing marks on the oil pump idler gear are for four cylinder engines with balancers.end by: a) install oil panDisassemble Oil Pump
start by:a) remove oil pump 1. Remove two bolts (1) and locks. Remove suction bell assembly (2). 2. Remove oil pump idler gear (3). 3. Use tool (A) to remove the idler gear bearing. 4. Remove the bolt and washer from the oil pump drive gear. Use tool (B) to remove the drive gear. Remove the key from the shaft. 5. Remove cover assembly (4). 6. Use tool (A) to remove the two bearings from the cover assembly. 7. Remove the two gears and shaft assemblies. Remove bolt (5). Remove valve assembly (6). 8. Use tool (A) to remove the two bearings from the cover assembly.Assemble Oil Pump
1. Use tool (A) to install two bearings each in the body assembly and the cover assembly. 2. Install valve assembly (2) with bolt (1). Install the two gears and shaft assemblies. Put oil on the two gears and make sure the gears move freely. 3. Install cover (3).4. Install the key on the shaft. Use the bolt and washer to install the oil pump drive gear. Make sure the key and gear groove are in alignment. 5. Use tool (A) to install the idler gear bearing.6. Install the oil pump idler gear. 7. Install bell assembly (4) with the two bolts and locks.end by:a) install oil pump