Solenoid Operated, Relief and Logic Cartridge
Valves
6. Reinstall the cartridge valve:
A. Lubricate new O-rings and backup rings of seal
kit with clean hydraulic oil and install. The O-ring and
backup ring must be arranged properly on the car-
tridge valve for proper operation and sealing.
1.
Make sure the manifold is clean before removing the
cartridge valve and seal kit.
Note:
Solenoid valves used in mow manifold (Fig. 45)
and lift manifold (Fig. 47) have an O--ring on each side
of coil.
B. Thread spool valve carefully into port. The valve
should go in easily without binding.
2.
the cartridge valve. Slide solenoid and O-rings (if
equipped) off the valve.
Forsolenoidvalves,removenutsecuringsolenoidto
IMPORTANT: Use care when handling the cartridge
valve. Slight bending or distortion of the stem tube
can cause binding and malfunction.
IMPORTANT: Use care when handling the cartridge
valve. Slight bending or distortion of the stem tube
can cause binding and malfunction.
C. Torque cartridge valve using a deep socket to
specification shown in manifold illustration.
Note:
On manifolds shown inFigures 45 and 47,sole-
3.
Remove seal kit from valve.
Remove cartridge valve with a deep socket wrench.
noids have an O--ring on each side of the coil. Also, on
these manifolds, apply Loctite 242 or equivalent to the
threads of the valve before installing the coil nut.
4.
Visuallyinspectthemanifoldportandcartridgevalve
for damage to sealing surfaces, damaged threads, and
contamination.
7. For solenoid valves, install solenoid coil and O-rings
(ifequipped) tothecartridgevalve.Torquenuttospecifi-
cation shown in manifold illustration.
A. Contamination may cause valves to stick or hang
up.Contaminationcanbecomelodgedinsmallvalve
orifices or seal areas causing malfunction.
8. If problems still exist, remove valve and clean again
or replace valve.
B. If valve sealing surfaces appear pitted or dam-
aged, the hydraulic system may be overheating or
there may be water in the system.
Rotary Cartridge Valves
1.
Remove knob assembly (reel manifold shown inFig-
ure 45):
A. Unscrew and remove knob. Remove both jam
nuts.
CAUTION
B. Slide off indicator plate being careful not to lose
springs. Remove spring.
Use eye protection such as goggles when using
compressed air.
C. Loosen set screw and slide detent plate off the
cartridge valve stem.
5.
Cleaning cartridge valves:
A. For non--solenoid operated valves:
D. Remove locating plate with pin from the cartridge
valve stem and manifold.
Submerge valve in clean mineral spirits to flush out
contamination. If valve design allows, use a probe to
push the internal spool in and out 20 to 30 times to
flush out contamination. Particles as fine as talcum
powder can affect the operation of high pressure hy-
draulic valves. Clean and dry cartridge with com-
pressed air.
2.
Remove rotary handle (reel manifold shown in Fig-
ure 46) (Fig. 48):
A. Loosen two (2) set screws that secure handle
cap.
B. For solenoid operated valves:
B. Remove screw and then lift handle cap from
valve.
Temporarily install solenoid on cartridge valve and
connecta12voltpowersourcetothesolenoid.While
energized, flush out any contamination with a non-
flammable aerosol brake cleaner. De-energize the
solenoid. Repeat the flush while energized proce-
dure 5 or 6 times. Particles as fine as talcum powder
can affect the operation of high pressure hydraulic
valves. Remove solenoid.
C. Locate and retrieve detent pin, compression
spring, bushing and lip seal. The sleeve bearing
should stay in the cap.
D. Loosen two (2) set screws that secure handle
base to flow control valve and remove base.
Reelmaster 6500-D/6700-D
Page 4 - 77 Rev. E
Hydraulic System
| Categories | Lawn Mower Manual, Toro Lawn Mower Manual |
|---|---|
| Tags | Toro Reelmaster 6500-D, Toro Reelmaster 6700-D |
| Download File |
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| Document Type | Service Manual |
| Language | English |
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| Product Type | Walk Behind Mower |
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