PS-150C Pneumatic Compactor Machine System Caterpillar


Metering Pump (Steering)

Usage:

PS-150C FPS


Illustration 1g01088091
(1) Metering pump

Metering pump (1) is located inside the steering column. The cover on the front of the steering column provides access to the metering pump.

Oil from the outlet of the steering pump flows to the metering pump. The control spool in the metering pump is a sleeve type rotary valve which is spring centered. The metering pump is a gerotor pump. The control spool governs the direction of the turn, while the metering pump controls the rate of the turn.

The metering pump contains four ports. The ports are marked for identification. The following list describes each port:

  • The inlet from steering pump (P port)

  • The return line to hydraulic tank (T port)

  • The outlet to the rod end of steering cylinder (R port)

  • The outlet to the head end of steering cylinder (L port)

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