Service Manual

5
Figure 15 shows a hydraulic reel motor.
Figure 16 illustrates the basic circuit and compo-
nents necessary to drive the reel cutting units. With
the spool in the upward position, the oil flow is di-
rected through the spool valve to the lower port
driving the motor in the forward direction.
Actuating the spool to the down position, the flow of
oil from the pump is directed to the opposite port of
the motor. The motor than rotates in the reverse di-
rection (Fig 17).
Another type of valve system becoming popular in
turf equipment is the electric solenoid type valve
system. The solenoid valve system consists of a
machined valve body. This valve body contains the
solenoid valves and the internal porting to make
the valve operate (Fig 18). The outer ports on the
valve body are threaded to allow hoses and lines to
be connected to the valve body. Care should be
taken when tightening the hose and line fittings so
the valve is not distorted by over tightening of the
connections. Tighten the line and hose connections
to the correct Flats From Finger Tight (F.F.F.T.)
spec. listed in the service manual.
The electric solenoid valve operates by supplying
electrical current to a coil magnet, the magnetic
field moves a valve spool and this directs the oil.
The thing to remember is that the only difference
between a hydraulic\electric valve, and a regular
hydraulic valve is the way that the spool is moved.
The solenoid valves consist of the valve cartridge
and the solenoid coil (Fig 19). To disassemble the
valve remove the coil assembly and then carefully
unscrew the valve body. The O-rings and seals
should be replaced whenever a valve body is re-
moved or replaced.
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19