Toro Greensmaster 3150 Service Manual page 97

Optional Backlap Kit Flow Control and Two Position
Directional Valves (Fig. 40)
CAUTION
Before continuing further, read and become fa-
miliar with General Precautions for Removing
and Installing Hydraulic System Components.
1. Remove knob assembly:
A. Unscrew and remove knob (17). Remove both
jam nuts (18).
B. Slide off applicable indicator plate (6 or 19) being
careful not to lose springs (20 or 21). Remove
springs.
C. Loosen set screw (23) and slide detent plate (22)
off the applicable cartridge valve (7 or 13) stem.
D. Remove the applicable locating plate with pin
(25 or 26) from the cartridge valve stem and man-
ifold (27).
2. Remove cartridge valve (7 or 13) and seal kit
(8 or 11).
3. Visually inspect the port in the manifold (27) for
damage to the sealing surfaces, damaged threads, and
contamination.
4. Visually inspect cartridge valve (7 or 13) for dam-
aged sealing surfaces and contamination.
A. Contamination may cause valves to stick or
hang up, it can become lodged in small valve ori-
fices 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 (7 or 13) using
clean mineral spirits. Submerge valve in clean mineral
spirits to flush out contamination. Particles as fine as tal-
cum powder can affect the operation of high pressure
hydraulic valves. Use compressed air for cleaning.
Greensmaster 3150
6. Reinstall the cartridge valve (7 or 13):
A. Lubricate new O–ring and backup ring of seal kit
(8 or 11) with clean hydraulic oil and install. The O–
ring and backup ring of seal kit must be arranged
properly on the cartridge valve (7 or 13) for proper
operation and sealing.
B. Thread valve carefully into the applicable port
(RD1 or FC1). The valve should go in easily without
binding. Torque valve to 35 ft–lb (47 Nm).
7. Reinstall knob assembly:
A. Install applicable locating plate (25 or 26) so that
the pin seats into the locating hole.
B. Turn the threaded cartridge valve (7 or 13) stem
carefully clockwise until it stops.
C. Face detent plate (22) counterbore down.
Thread detent plate down onto the valve stem until it
is stopped by the locating plate. Turn detent plate
back counterclockwise 1/4 turn.
D. Center one detent plate hole over a locating
plate indentation. Drop a ball (24) into each hole,
then drop a spring (20 or 21) into each hole.
E. On flow control valve (7), place indicator plate (6)
over the detent plate. Make sure the arrow points di-
rectly at the number 1 on the locating plate.
F. On directional cartridge cartridge valve (13),
place indicator plate (19) over the detent plate.
Make sure the arrow points to the right at 45
G. While pushing down on the indicator plate (6 or
19) and compressing the springs, thread down a
jam nut (18). While tightening the set screw (23),
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 on the
valve stem threads. Screw knob (17) all the way
down until it hits the upper jam nut.
I. On directional cartridge valve (7), turn knob (17)
counterclockwise so the arrow is 90
of the manifold (27). Simultaneously tighten upper
jam nut (18) and turn knob so it is tight and the arrow
is pointing 45
plate (6).
J. On flow control cartridge valve (13), turn knob
(17) counterclockwise until the arrow points at the
number "5". Simultaneously tighten upper jam nut
(18) and turn knob so it is tight and the arrow is point-
ing at the number "1" on the locating plate (19).
Page 4 – 73 Rev. C
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with the back
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to the right in line with the indicator
Hydraulic System
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