McHale
R62-72 & R68-78
Twin-Rotor Rake
35
6.3 Adjusting flow control valves (LH & RH)
The control valves are preset at fully open with equal oil flow through each. It may be
necessary to adjust these valves if the rotor arms are not raising and lowering evenly.
Side guard rails latched in the working position
1.
When raising or lowering the rotor arms
between the work and transport
positions, there may be a noticeable
difference in ram speed (oil flow)
between the LH and RH sides. If this is
the case, then the control valves can be
used to throttle back the faster ram until
both arms move at a similar speed.
2.
The oil flow on the faster side can be
reduced by turning the blue knob on the
control valve clockwise. Adjust in very
small increments, raising and lowering
the rotor arms each time until they both
move at a similar speed.