Servicing The Cartridge Valves In A Control Manifold - Toro Groundsmaster 360 Service Manual

Servicing the Cartridge Valves in a Control Manifold

Hydraulic System: Service and Repairs
Before opening the hydraulic system, operate all the hydraulic
controls to release system pressure and avoid injury from the
pressurized hydraulic fluid; refer to
Hydraulic System (page
1. Ensure that the control manifold is clean before you remove the cartridge
valve from the assembly.
2. If the cartridge valve is solenoid operated, remove the nut that secures the
solenoid coil to the cartridge valve. Carefully slide the coil off the valve.
Label the cartridge valves before removal so that the valves can be
correctly installed into the control manifold.
Carefully handle the cartridge valve. Slight bending or distortion of
the stem tube can cause binding and malfunction. When removing
the cartridge valve from the control manifold, ensure that the deep
well socket fully engages the valve base.
3. Use a deep socket wrench to remove the cartridge valve from the control
manifold. Note the correct location of the O-rings, sealing rings, and back-up
rings.
4. Remove and discard the seal kit from the cartridge valve.
5. Visually examine the port in the control manifold for damaged sealing
surfaces, damaged threads, and contamination.
6. Visually inspect the cartridge valve for damaged sealing surfaces and
contamination.
A. Contamination can cause the valves to stick or hang up. Contamination
can accumulate in small valve orifices or seal areas and cause
malfunction.
B. If the sealing surfaces of the valve are pitted or damaged, the hydraulic
system may be overheating or there can be water in the system.
Use eye protection such as goggles when using compressed air.
Sudden movement of the internal valve spools can release the
stored fluid suddenly.
CAUTION
Releasing Pressure from the
4–5).
IMPORTANT
IMPORTANT
CAUTION
CAUTION
Page 4–134 Groundsmaster 360
16225SL Rev C