4) Manual steering
When there is no piston pump supply pressure the flow selector is moved to the left by its spring.This
connects together the inlet and outlet ports of the lower gyrotor pump and disconnects this pump from
the system.When the steering is operated manually,only the upper gyrotor pump section is used to
direct flow to the steering cylinder. This reduces operator effort to an acceptable level,however the
number of turns from lock to lock is increased.
Fig. 8-5 Manual steering
8-6
TP
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