GASKET-COPPER 7F0880 - Caterpillar

Illustration 1 g01171766
Swivel
(1) Retainer
(2) Cover
(3) Drain port
(4) Drain hole
(5) Port
(6) Seal
(7) Port
(8) Port
(9) Housing
(10) Port
(11) Port
(12) Flange
(13) Seal
(14) Rotor
(15) Port
(16) Port
(17) Port
(18) Port
(19) Port
(20) Port
(21) Swivel
Table 1
Identification Of Port And Circuit
Ports (Housing) Ports (Rotor) Circuit
7 17 Right travel (reverse)
10 20 Right travel (forward)
8 19 Left travel (forward)
5 16 Left travel (reverse)
3 18 Drain
11 15 Change of Travel speed The swivel accomplishes two functions. The swivel supplies pump oil from the upper structure to the travel motors of the lower structure. The upper structure swings. The lower structure does not swing. Swivel (21) returns oil from the travel motors to the hydraulic tank.Housing (9) is bolted to the upper structure at flange (12). Rotor (14) rotates within housing (9). A support arm is bolted to rotor (14) in order to prevent rotation. The ports of housing (9) are open to the ports of rotor (14). The passages in housing (9) and the passages in rotor (14) connect the ports.Seal (6) for high pressure and seal (13) for low pressure are provided between the sliding surfaces of housing (9) and rotor (14). Seals (6) and (13) prevent oil leakage between the passages.