CORE AS-OCLR 0R4759 - Caterpillar

START BY:a. remove fuel injection pumps
Be careful when the injection pumps are disassembled. Do not damage the surfaces of the plungers, barrels and bonnets. Any scratches will cause leakage inside the fuel injection pump. The plunger and barrel for each pump are made as a set. Do not put the plunger of one pump in the barrel of another pump. If one part has wear, install a complete new pump assembly. Be careful when the plunger is put into the bore of the barrel.
1. Pull plunger (4) and washer (3) out of barrel (1) and spring (2).2. Remove spring (2) from barrel (1). Do not remove the gear from the plunger. The gear and plunger are assembled and adjusted at the factory. 3. Use the following procedure to put the fuel pump in position on tooling (A).a. Select the correct turret position.b. Place a barrel assembly into the turret.c. Loosen the nut on the clamp.d. Adjust clamp end (6) until the bonnet is almost touching the barrel when the clamp handle is in the locked position.e. Tighten the nut on the clamp.4. Use tool (B) to expand ring (5), and carefully lift it off the fuel pump.5. Slowly, release the clamp handle of tooling (A), and remove the lockring.6. Remove bonnet (7), spring (8) and valve (9) from barrel (1).Assemble Fuel Injection Pumps
Put clean fuel oil on all parts during assembly.
1. Put spring (2) and valve (5) in barrel (1).2. Put bonnet (4), barrel (1) and ring (3) in position on tool (A). 3. Put the barrel assembly in position on tooling (A). Lower the handle on tool group (A) to hold the fuel pump together.4. Use tool (B), and lower ring (3) on to the barrel and the bonnet to hold them together.5. Remove the barrel assembly from tooling (B). 6. Install spring (7) on barrel (4).7. Install washer (8) on plunger (9). Make sure the spring seat on the washer is away from the gear on the plunger.8. Install plunger (9) in barrel (4). Make sure spring (7) is engaged in the spring seat on washer (8).END BY:a. install fuel injection pumps