ORIFICE 7J9973 - Caterpillar

2. Remove fuel lines (1) and (2) from the transfer pump. 3. Remove bolts (3) and (5) and transfer pump (4).Install Fuel Transfer
1. Make sure O-ring seal (2) is in position on the transfer pump.2. Put transfer pump (1) in position and install the bolts and clip. 3. Install fuel lines (3) and (4).4. Open the fuel valve at the fuel tank.Disassemble Fuel Transfer Pump
start by:a) remove fuel transfer pump
Cover (2) is under spring tension.
1. Carefully remove bolts (1) and cover (2) from the fuel transfer pump. 2. Remove spring (3), valve (4) and O-ring seals (5) from the cover. 3. Remove springs (6) and (7) from the pump housing. 4. Remove sleeve (8) from the pump housing. 5. Remove sleeve (12), piston (16), O-ring seal (11) and piston (9) from sleeve (8). Remove plate (15), valve (10) and seal (14) from piston (9). Remove O-ring seal (13) from sleeve (8). 6. Remove O-ring seal (17) from the pump housing. 7. Push guide (18) through the pump housing and remove guides (23) and (18) together. Remove rod (20), guide (23), O-ring seal (19) and tappet (21) from guide (18). Remove ring (22) from tappet (21). 8. Remove connector (24), valve (26) and seal (25) from the pump housing. 9. Remove plug (30), spring (28), valve (29) and seal (27) from the pump housing.Assemble Fuel Transfer Pump
1. Clean all parts and be sure all passages are open.2. Be sure the O-ring seal is in position on plug (4) and put 4L7464 Silicone Grease on the O-ring seal. Valves (2), (6) and (19) must be installed as shown, for the pump to operate correctly. 3. Install seal (1), valve (2), spring (3) and plug (4) in the pump housing as shown. Tighten plug (4) to a torque of 20 7 N m (15 5 lb.ft.). 4. Be sure the O-ring seal is in position on connector (7) and put 4L7464 Silicone Grease on the O-ring seal.5. Install seal (5), valve (6) and connector (7) in the pump housing as shown. Tighten connector (7) to a torque of 55 10 N m (40 7 lb.ft.). 6. Install the ring on tappet (8). Install tappet (8), O-ring seal (12), guide (9) and rod (10) in guide (11). Put 4L7464 Silicone Grease on O-ring seal (12). Install guides (11) and (9) as a unit in the pump housing as shown. 7. Install O-ring seal (13) in the pump housing and put 4L7464 Silicone Grease on the O-ring seal. 8. Install seal (15), valve (19) and plate (16) in piston (14) as shown. Install piston (14), O-ring seal (17), piston (20) and guide (21) in guide (18) as shown. Install the O-ring seal on guide (18) and put 4L7464 Silicone Grease on O-ring seal (17) and the O-ring seal on guide (18). 9. Install guide (18) in the pump housing as shown. 10. Install springs (19) and (20) in the pump housing as shown. 11. Install O-ring seals (22) and