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| Illustration 1 | g00586893 |
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) Plate (16) Port (17) Port (18) Port (19) Port (20) Port (21) Port (22) Swivel (23) Support (24) Forward direction of track frame | |
| IDENTIFICATION of PORT and CIRCUIT | ||
| Ports (Housing) | Ports (Rotor) | Circuit |
| 7 | 18 | Right travel (reverse) |
| 10 | 21 | Right travel (forward) |
| 8 | 20 | Left travel (forward) |
| 5 | 17 | Left travel (reverse) |
| 3 | 19 | Drain |
| 11 | 16 | Change of Travel speed |
Swivel (22) accomplishes two functions. One function is supplying pump oil from the upper structure, which swings, to the travel motors of the lower structure, which does not swing. The other function is providing a means of returning oil to the hydraulic tank from the travel motors.
Housing (9) is bolted to the upper structure through support (23). Rotor (14) is bolted to the lower structure through plate (15). The ports of housing (9) are open to the ports of rotor (14). These ports are open through passages in housing (9) and rotor (14) .
Seal (6) for high pressure and seal (13) for low pressure are provided between the sliding surfaces of housing (9) and of rotor (14). Seals (6) and (13) prevent oil leakage between the passages.