Rear Wheel Drive Valve Block - Toro Reelmaster
4000?D Service Manual

Rear Wheel Drive Valve Block

RM 4000−D 4WD
MANIFOLD BLOCK
NOTE:
If cartridge valve seals appear pitted or
damaged, the hydraulic system may be overheating or
there may be water in the hydraulic system.
Cleaning Solenoid Actuated Cartridge Valve
Use a deep socket to remove the valve cartridge. Use
mineral spirits to clean solenoid actuated cartridge
valves. Submerge the valve in clean mineral spirits and
use a probe to push the internal spool in and out 20 to
30 times to flush out contamination. Mineral spirits does
not affect the O−ring material. Particles as fine as talcum
powder can affect the operation of high pressure hy-
draulic valves.
NOTE: Apply clean hydraulic oil to the O−rings before
installing the valve. Use a deep socket to install the valve
into the manifold block. Tighten to a torque of 35 ft−lb (48
Nm). Install the solenoid coil. Make sure there is an O−
ring at each end of the coil. After putting the solenoid
onto the valve stem apply Loctite 242 or equivalent to
the threads on the stem before installing the nut. Tighten
the nut to a maximum torque of 15 in−lb (1.7 Nm) to se-
cure the solenoid; do not over−tighten.
Reelmaster 4000−D
Figure 90
Page 4 − 87
Rev. C
Figure 91
Hydraulic System