LAMP GP-BASIC 4720507 - Caterpillar

Remove Fuel Injection Pumps
Before any service work is to be done on the fuel system the outer surface of injection pump housing must be clean.
1. Remove the cover assembly (1) from the pump housing. Remove spring for the bypass valve. 2. Loosen the bushing (2) from the pump housing with tool (A). Do not loosen the screws (3) that hold levers to shaft when removing or installing pumps. If levers are moved, fuel pump adjustment will be changed.3. Remove the fuel injection pump from the pump housing. The sleeve on the plunger will slide off the lever as the pump is removed.Install Fuel Injection Pumps
1. Put the fuel injection pump (1) in the bore of pump housing.2. The sleeve (2) will be engaged with lever when installed correctly.
If levers have been moved on the shaft, fuel pump adjustment must be made. (See TESTING AND ADJUSTING).
3. Tighten the bushing with wrench (A) to a torque of 70 5 lb.ft. (9.7 0.7 mkg). 4. Put the spring on the bypass valve. Install the cover assembly on the pump housing. Be sure the spring (4) is in position in the cover.Disassemble Fuel Injection Pumps
start by:a) remove fuel injection pumps1. Remove the bushing (1) from the bonnet (2).2. Remove the ring (3) from the bonnet and barrel (7). Remove the check valve (6) and spring (4) from the bonnet.3. Remove the spring (8) and washer (5). Remove the plunger (9) and sleeve (10). Keep the plunger and sleeve with their respective barrel for installation. Do not use plungers, sleeves, and barrels with other plungers, sleeves, and barrels.Assemble Fuel Injection Pumps
1. Install the sleeve (4), plunger (5), spring (2), and washer (3) on the barrel (1). Be sure sleeve and plunger are installed in original barrel, and large hole in plunger is up.2. Install check valve and spring in bonnet. Connect the barrel and bonnet and install the ring. Install the bushing on the bonnet.end by:a) install fuel injection pumps