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| Illustration 1 | g01189647 |
Left Side of Machine (1) Tow point manifold (2) Counterbalance valve (one of two) (3) Tow point solenoid (4) Arc suppressor (5) Arc suppressor (6) Pressure tap (7) Tow point solenoid | |
The machine is equipped with two tow point manifolds. Left tow point manifold (1) is mounted to the front bulkhead which is on the left side of the machine. The front side cover provides access to the left tow point manifold. The right tow point manifold is mounted on the right side of the machine, in the same relative position.
The tow point manifolds contain four ports. Each port is identified with a letter which is stamped into the block next to the port.
Each tow point manifold is equipped with two solenoids (3) and (7). One solenoid raises the tow point, and one solenoid lowers the tow point. The left tow point control switches operate the left tow point raise solenoid and operate the left tow point lower solenoid. The right tow point control switches operate the right tow point raise solenoid and operate the right tow point lower solenoid.
Each tow point solenoid has an associated arc suppressor (4) and (5). The arc suppressors are mounted under the tow point manifold.
The solenoid can be identified by the wiring. The wire numbers are as follows:
- "K792-GN" - Left tow point lower solenoid
- "K793-BU" - Left tow point raise solenoid
- "K794-YL" - Right tow point lower solenoid
- "K795-BR" - Right tow point raise solenoid.
The tow point manifold is equipped with two counterbalance valves. Valve (2) is shown. The counterbalance valves prevent the tow point from being raised or lowered unless the appropriate tow point solenoid is energized. The counterbalance valves are set at 13100 kPa (1900 psi).
Pressure tap (6) can be used in order to measure supply pressure from the auxiliary pump.