PUMP GP-PISTON 4498864 - Caterpillar

2. Disconnect inlet lines (3) from the pump.3. Remove outlet line (1) from the pump.4. Remove the two bolts that hold the bracket. Remove the bolts (2) that hold the base.5. Remove the fuel priming pump.Install Fuel Priming Pump
1. Put the pump (1) on filter housing. Connect the outlet line for the fuel.2. Install the bolts that hold base to fuel filter housing.3. Install the two bolts for the bracket.4. Connect the inlet lines to the priming pump.5. Turn the fuel valve to the "ON" position.Disassemble Fuel Priming Pump
start by:a) remove fuel priming pump 1. Remove the tube (2) from valve body (1).2. Remove bracket (3) and retainer from tube.3. Remove knob, nut, plate, guide and spring. Remove piston and rod from the tube. 4. Remove the rings (4) and O-ring seals from piston (5).5. Remove plug, washer, springs, valve, and O-ring seal from valve body.Assemble Fuel Priming Pump
1. Install the O-ring seal, springs (3), valve (2), washer and plug in the valve body (1). On later engines the fuel control valve uses a single plunger and spring.2. Put a small amount of 4L7464 Silicone Grease on the rings and seals.3. Put the O-ring seals on piston. Install the rings over the O-ring seals. 4. Install the piston in the tube with tool (A). Install the spring, guide, plate, nut and knob on the rod (4). Install the bracket and retainer.5. Put the tube (5) on the valve body.end by:a) install fuel priming pump