Rotary Cartridge Valves - Toro Reelmaster 5500-D Service Manual

6. Reinstall relief valve cartridge:
A. Lubricate new O-ring and backup ring 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.
B. Thread relief valve cartridge carefully into the
port. The valve should go in easily without binding.
Torque valve to 45 ft-lb (61 N-m).

Rotary Cartridge Valves

1. Remove knob assembly:
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. Make sure manifold is clean before removing the
cartridge valve. Remove the valve and seal kit.
3. Visually inspect port in the manifold for damage to
the sealing surfaces, damaged threads, and contamina-
tion.
4. Visually inspect cartridge valve for damaged sealing
surfaces and contamination.
A. Contamination may cause valves to stick or hang
up, it can become lodged in small valve orifices or
seal areas causing malfunction.
B. If sealing surfaces appear pitted or damaged, 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. If necessary, clean cartridge valve using clean min-
eral spirits. Submerge valve in clean mineral spirits to
flush out contamination. Particles as fine as talcum pow-
der can affect the operation of high pressure hydraulic
valves. Clean and dry with compressed air.
Reelmaster 5500-D
6. Reinstall the cartridge valve:
Note: There are two different types of manual rotary
cartridge valves: flow control (reel speed − size 10) and
4−way directional control (backlap − size 12). Installa-
tion torque vales are different for each type.
A. Lubricate new O-ring and backup ring of seal kit
with clean hydraulic oil and install. The O-ring and
backup ring of seal kit must be arranged properly on
the cartridge valve for proper operation and sealing.
B. Thread cartridge valve carefully into the manifold
port. The valve should go in easily without binding.
Tighten valve to correct torque:
Reel speed (size 10) to 45 ft lb (61 N−m)
Backlap (size 12) from 55 to 60 ft−lb (75 to 81 N−m)
7. Reinstall knob assembly:
A. Install locating plate so that the pin seats into the
locating hole.
B. Turn the threaded cartridge valve stem carefully
clockwise until it stops.
C. Face detent plate counterbore down. Thread det-
ent plate down onto the valve stem until it is stopped
by the locating plate. Turn detent plate back counter-
clockwise 1/4 turn.
D. Center one detent plate hole over a locating plate
indentation. Drop a ball into each hole, then drop a
spring into each hole.
E. On the 2-position directional valve cartridge,
place indicator plate over the detent plate. Make sure
the arrow points directly at the number 1 on the locat-
ing plate.
F. On flow control cartridge valve cartridge, place in-
dicator plate over the detent plate. Make sure the ar-
row points to the right at 45
G. While pushing down on the indicator plate and
compressing the springs, thread down a jam nut.
While tightening the set screw, tighten jam nut at the
same time using a 7/16 - inch wrench
H. Thread second jam nut all the way down the valve
stem. Apply "Loctite 242" or equivalent the valve
stem threads. Screw knob all the way down until it
hits the upper jam nut.
I. On 2-position directional cartridge valve car-
tridge, turn knob counterclockwise so the arrow is
o
90 with the back of the manifold. Simultaneously
tighten upper jam nut and turn knob so it is tight and
the arrow is pointing 45
indicator plate.
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to the right in line with the
Hydraulic System (Rev. C)