Hydraulic
System
Rev. E
Reelmaster 6500-D/6700-D Hydraulic SystemPage 4 - 77
Solenoid Operated, Relief and Logic Cartridge
Valves
1. Make sure the manifoldis 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.
2. Forsolenoidvalves,remove nutsecuringsolenoid to
the cartridge valve. Slide solenoid and O-rings (if
equipped) off the valve.
IMPORTANT: Use care w hen handling the cartridge
valve. Slight bending or distortion of the stem tube
can cause binding and malfunction.
3. Remove cartridge valve with a deep socket wrench.
Remove seal kit from valve.
4. Visuallyinspect themanifold portand cartridgevalve
for damage to sealing surfaces, damaged threads, and
contamination.
A. Contamination may cause valvesto s tick or hang
up.Contaminationcanbecomelodgedinsmallvalve
orifices or seal areas causing 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.
5. Cleaning cartridge valves:
A. For non--solenoid operated valves:
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.
B. For solenoid operated valves:
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.
6. Reinstall the cartridge valve:
A. Lubricate new O-rings and backup rings of seal
kit with cleanhydraulic oiland install.The O-ringand
backup ring must be arranged properly on the car-
tridge valve for proper operation and sealing.
B. Thread spool valve carefully into port. The valve
should go in easily without binding.
IMPORTANT: Use care w hen 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 shownin Figures 45 and 47, sole-
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.
7. For solenoid valves, install s olenoid coil and O-rings
(ifequipped) to the cartridgevalve. Torquenutto specifi-
cation shown in manifold illustration.
8. If problems still exist, remove valve and clean again
or replace valve.
Rotary Cartridge Valves
1. Removeknob assembly (reel manifold shown in Fig-
ure 45):
A. Unscrew and remove knob. Remove both jam
nuts.
B. Slide off indicator plate being careful not to lose
springs. Remove spring.
C. Loosen set screw and slide detent plate off the
cartridge valve stem.
D. Remove locating plate with pin from the cartridge
valve stem and manifold.
2. Remove rotary handle (reel manifold shown in Fig-
ure 46) (Fig. 48):
A. Loosen two (2) set screws that secure handle
cap.
B. Remove screw and then lift handle cap from
valve.
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.
