TOW WINCH HYDRAULIC SUBSYSTEM.
d. Moving the handle of the directional
control valve (1) in PAY OUT position has
the same effect as in PAY IN except that
the hydraulic fluid is routed in the opposite
direction through the hydraulic motor (8).
b. T h e t o w w i n c h h y d r a u l i c s u b s y s t e m
The relief valve (10) controls the rate of
controls the power for tow winch operation
flow in the return line.
when pulling or releasing a load.
e. When the handle of the directional
Moving the handle of the directional
control valve (1) is in the neutral position,
control valve (1) in the PAY IN position
hydraulic fluid from both 40 gpm hydraulic
directs hydraulic fluid to release brake (7)
pumps flows through the open center port
and operate the hydraulic motor (8) to
to the reservoir.
retrieve the tow winch wire rope. Return
fluid from the hydraulic motor (8) flows
f. I f t h e b o o m w i n c h i s u s e d a t t h e
through the pressure relief valve (10) and
same time that the tow winch is being
the directional control valve (1), then to the
used, the tow winch operation will be
reservoir. The relief valve (4) limits hydrau-
lic pressure when paying in to 2150 psi
(14,824 kPa) to