Tow Hitch Manifold Service (Tow Hitch Kit) - Toro ProCore Processor Service Manual

Tow Hitch Manifold Service (Tow Hitch Kit)

1. Make sure the manifold is thoroughly cleaned before
removing any of the solenoid valves.
2. Remove nut that secures solenoid coil to solenoid
valve. Slide coil from valve.
IMPORTANT: Use care when handling the hydraulic
valve. Slight bending or distortion of the stem tube
can cause binding and malfunction.
3. Using a deep socket, remove valves from manifold.
Note correct location of sealing and backup rings. Re-
move and discard sealing and backup rings from valves.
4. Visually inspect the manifold port and removed
valves for damage to the sealing surfaces, damaged
threads and contamination.
A. Contamination may cause valve to stick or hang
up. Contamination can become lodged in small valve
orifices or seal areas causing valve malfunction.
B. If valve sealing surfaces appear pitted or dam-
aged, the hydraulic system may be overheating or
there may be water in the system.
CAUTION
Use eye protection such as goggles when using
compressed air for cartridge valve cleaning.
5. Clean valves by submerging valve in clean mineral
spirits to flush out contamination. Particles as fine as tal-
cum powder can affect the operation of the valve. Be ex-
tremely careful not to damage cartridge. Use
compressed air for cleaning.
6. Lubricate new valve seal kit components with clean
hydraulic oil and install on valves. The sealing and back-
up rings must be arranged properly on the valves for
proper operation and sealing.
7. Thread valves carefully into correct manifold port.
The valves should go in easily without binding. Using a
deep socket, torque hydraulic valves to 25 ft- -lb (33.9
N- -m).
8. If solenoid coil was removed, slide coil onto solenoid
valve. Secure coil with nut. Torque nut 60 in- -lb (6.8
N- -m).
Hydraulic System
8
3
25 ft- -lb
(33.9 N- -m)
4
8
60 in- -lb
(6.8 N- -m)
7
6
1. Solenoid valve S1
2. Solenoid valve S2
3. Solenoid valve S3
4. Solenoid valve S4
Page 4 - - 32
7
60 in- -lb
(6.8 N- -m)
6
8
25 ft- -lb
(33.9 N- -m)
1
5
2
25 ft- -lb
(33.9 N- -m)
8
Figure 25
5. Tow hitch manifold
6. Nut
7. Nut
8. Solenoid coil
ProCore Processor
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