CRANKCASE 1W6472 - Caterpillar

(1) Pump assembly.(2) Fuel from electronic control module.(3) Fuel to fuel manifold.(4) Fuel filter base. Fuel filter base is mounted to the cylinder head. A remote mounted fuel priming pump group is available.Fuel Priming Pump Assembly
Fuel Priming Pump AssemblyPump assembly closed and plunger tightened to a torque of 2.5 0.5 N m (22 4 lb in). Plunger air leak limit at 300 5 kPa (44 1 psi) is 2 cc/min.Plunger assembly open (at any position). Piston seal air leak rate limit at 300 5 kPa (44 1 psi) is 300 cc/min.(1) Open reference distance ... 147.1 mm (5.79 in)(2) Plunger Assembly.(3) Ring. Roll lip of plunger assembly around ring after assembling plunger assembly into barrel (5).(4) Closed reference distance ... 112.1 mm (4.41 in)(5) Barrel.(6) Seal and Ring. For proper assembly, assemble seal and ring to plunger assembly using mandrel and ring pusher. Insert plunger assembly into barrel using resizing tool.(7) Seal.Valve (A) air leak rate limit at 75 2 kPa (11 1 psi) is 1160 cc/min.Valve (B) air leak rate limit at 37 2 kPa (5 1 psi) is 600 cc/min.