Toro Sand Pro 3040 Service Manual page 158

Servicing a Hydraulic Cartridge Valve (continued)
Hydraulic System: Service and Repairs
While energized, flush out any contamination with a nonflammable
aerosol brake cleaner. De-energize the solenoid. Repeat the flush
while energized procedure 5 or 6 times. Remove the solenoid from the
cartridge.
6. Install the cartridge valve:
A. Lubricate the new O-rings and the backup rings of the seal kit with clean
hydraulic fluid and install them on the cartridge valve. The O-rings and the
backup rings must be arranged correctly on the cartridge valve for proper
operation and sealing; refer to notes taken during the seal removal.
Use care when installing the cartridge valve. Slight bending or
distortion of the stem tube can cause binding and malfunction.
Make sure that deep well socket fully engages the valve base.
B. Lubricate the threads on the cartridge valve with clean hydraulic fluid.
Thread the cartridge valve carefully into the correct manifold port. The
valve should thread in easily without binding.
C. Tighten the cartridge valve using a deep well socket to the following
specifications:
• Traction relief valve = 32 to 35 N·m (24 to 26 ft-lb).
• Rear lift relief valve (model 08743) = 32 to 35 N·m (24 to 26 ft-lb).
• Optional rear remote hydraulics solenoid valve = 32 to 35 N·m (24
to 26 ft-lb).
• Optional hydraulic switch kit valves = refer to
Hydraulic Switch Kit Manifold (page
D. For solenoid valves, slide the solenoid coil onto the cartridge valve.
Tighten the coil nut to 0.6 N·m (5 ft-lb)
7. If a problem still exists, remove the valve and clean it again or replace the
valve.
IMPORTANT
5–119).
Page 5–88
Servicing the Optional
Sand Pro ® 3040 and 5040
20251SL Rev A