KIT-TRANSMISSION BEARING 3801470 - Caterpillar

Illustration 1 g00580591
Left swing motor (rear view) (1) Block (3) Anti-reaction valve (4) Anti-reaction valveAt the stop of a swing operation, it is difficult to smoothly stop the upper structure and implements at the desired position. This is due to the mass (weight and size) of the upper structure. The outlet port of the swing motor is blocked. This causes an oscillation or a rocking motion in the swing motor. Anti-reaction valves (3) and (4) provide a more exact swing movement. The anti-reaction valves also prevent shock load at the stop of the swing operation. Anti-reaction valves (3) and (4) are located in block (1) . Block (1) is mounted on the rear of the left swing motor.
Illustration 2 g00646776
Anti-reaction valve (swing operation) (1) Block (2) Swing pump (3) Anti-reaction valve (4) Anti-reaction valve (5) Motor rotary group (6) Internal passage (7) Port (return oil) (8) Passage (return oil) (9) Internal passage (10) Passage (supply oil) (11) Port (supply oil) (12) Internal passage (13) Spring (14) Valve seat (15) Passage (16) Plunger (17) Passage (18) Spring (19) Piston chamber (20) Passage (21) Spring chamber (22) Spring (23) Valve seat (24) Plunger (25) Spring (26) Piston (27) Passage (28) Spring chamber (29) Piston (30) Swing control valveWhen the swing control lever is in the NEUTRAL position, no oil from the swing pump is supplied to motor rotary group (6) . Plungers (24) and (16) in the anti-reaction valves are shifted downward by the force of springs (25) and (18) . Valve seats (23) and (14) are shifted downward against the plungers by springs (22) and (13) .When the swing control lever is activated, the oil delivery from swing pump (2) flows through swing control valve (30) , port (11) , passage (10) and passage (12) to motor rotary group (5) . From the motor rotary group, the oil flows through passage (6) , passage (8) and port (7) . The motor rotary group rotates.Pressure oil from the swing pump at port (11) also flows to anti-reaction valves (3) and (4) . At anti-reaction valve (3) , swing pump pressure and the force of spring (22) shifts valve seat (23) downward against plunger (24) . Plunger (24) shifts downward against piston (26) . Swing pump pressure at anti-reaction valve (4) flows through passage (9) into spring chamber (28) . Plunger (16) shifts upward against the force of spring (18) . Valve seat (14) is moved upward against the force of spring (13) by plunger (16) .
Illustration 3 g00646780
Anti-reaction valve (swing stop) (1) Block (2) Swing pump (3) Anti-reaction valve (4) Anti-reaction valve (5) Motor rotary group (6) Internal passage (7) Port (return oil) (8) Passage (return oil) (9) Internal passage (10) Passage (supply oil) (11) Port (supply oil) (12) Internal passage (13) Spring (14) Valve seat (15) Passage (16) Plunger (17) Passage (18) Spring (19) Piston chamber (20) Passage (21) Spring chamber (22) Spring (23) Valve seat (24) Plunger (25) Spring (26) Piston (27) Passage (30) Swing control valve (31) Orifice (32) Valve