PUMP GP-FUEL TRANSFER 2500847 - Caterpillar

Components
Illustration 2 g01240881Primary distribution valve (2) and secondary distribution valve (4) are located in the non-engine end frame. See Illustration 2.Secondary distribution valve (4) delivers grease to the following bearings:
Upper hitch (H-pin)
Lower hitch (J-pin)
Closed end of the right steering cylinder (Right L-pin)
Closed end of the left steering cylinder (Left L-pin)
Closed end of the tilt cylinder (G-pin)
Illustration 3 g01239982 Secondary distribution valve (3) is located on the engine end frame. See Illustration 3.Secondary distribution valve (3) delivers grease to the following bearings:
Open end for the right steering cylinder (Right L-pin)
Open end of the left steering cylinder (Left L-pin)
Rear trunnion
Front trunnion
Illustration 4 g01240337
(5) Distribution valve for the B-pin joints
(6) Distribution valve for the C-pin joints, E-pin joints, and F-pin joints
(A) A-pin
(B) B-pin
(C) C-pin
(E) E-pin
(F) F-pin
(K) K-pin Secondary distribution valves (5) and (6) are located on the boom. See Illustration 4.Secondary distribution valve (5) delivers grease to the following bearings:
Right bucket pin (Right B-pin)
Left bucket pin (Left B-pin)Secondary distribution valve (6) delivers grease to the following bearings:
Open end of the tilt cylinder (E-pin)
Right C-pin
Left C-pin
Upper right link pin (Right E-pin)
Upper left link pin (Left E-pin)
Lower right link pin (Right F-pin)
Lower left link pin (Left F-pin)Sequence of Operation
Phase 1
Illustration 5 g01177325
(7) Inlet port
(8) Piston
(9) Passage
(10) Passage
(11) Passage
(12) Outlet port
(13) Passage Pressurized lubricant that is sent by pump (1) enters the metering valve at inlet port (7). The lubricant flows through passages (9) and (13) to the right side of piston (8). Lubricant shifts piston (8) to the left. Lubricant in the left side of piston (8) flows through passages (10) and (11). The lubricant then flows out of outlet port (12).Phase 2
Illustration 6 g01177329
(8) Piston
(14) Outlet port
(15) Passage
(16) Passage
(17) Passage
(18) Passage
(19) Piston When piston (8) is at the extreme left position, passage (17) opens. Lubricant flows through passages (17) and (18). This lubricant shifts piston (19) to the left. Lubricant in the left side of piston (19) flows through passages (15) and (16). The lubricant then flows out of outlet port (14).Phase 3
Illustration 7 g01177337
(19) Piston
(20) Passage
(21) Outlet port
(22) Passage
(23) Passage
(24) Passage
(25) Piston When piston (19) is at the extreme left position, passage (22) opens. Lubricant flows through passages (22) and (24). This lubricant shifts piston (25) to the left. The lubricant in the left side of piston (25) flows through passages (23) and (20). The lubricant then flows out of outlet port (21).Phase 4
Illustration 8 g01177341
(25) Piston
(26) Passage
(27) Outlet port
(28) Passage
(29) Passage
(30) Passage
(31) Piston When piston (25) is at the extreme left position, passage (28) opens. Lubricant flows through passages (28) and (30). This lubricant shifts piston (31) to the left. The lubricant in the left side of piston (31) flows through passages (29) and (26). The lubricant then flows out of outlet port (27).Phase 5
Illustration 9 g01177344
(8) Piston
(10) Passage
(13) Passage
(19) Piston
(25) Piston
(31) Piston
(32) Passage
(33) Passage When piston (31) is at the extreme left position, passage (33) opens. Lubricant flows through passages (33) and (10) to the left side of piston (8). Lubricant shifts piston (8) to the right. The lubricant in the right side of piston (8) flows