Flow Control and Two Position Directional Valves
(Fig. 62)
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--
CAUTION
ring and backup ring of seal kit must be arranged
properly on the cartridge valve (7 or 13) for proper
operation and sealing.
Before continuing further, read and become fa-
miliar with General Precautions for Removing
and Installing Hydraulic System Components.
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 N--m).
1.
Remove knob assembly:
7.
Reinstall knob assembly:
A. Unscrew and remove knob (17). Remove both
jam nuts (18).
A. Install applicable locating plate (25 or 26) so that
the pin seats into the locating hole.
B. Slideoffapplicableindicatorplate(6or19)being
careful not to lose springs (20 or 21). Remove
springs.
B. Turn the threaded cartridge valve (7 or 13) stem
carefully clockwise until it stops.
C. Face detent plate (22) counterbore down.
Threaddetentplatedownontothevalvestem untilit
is stopped by the locating plate. Turn detent plate
back counterclockwise 1/4 turn.
C. Loosensetscrew(23)andslidedetentplate(22)
off the applicable cartridge valve (7 or 13) stem.
D. Remove the applicable locating plate with pin
(25
ifold (27).
or 26) from the cartridge valve stem and man-
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.
2.
Remove cartridge valve (7 or 13) and seal kit (8 or
11).
E. Onflowcontrolvalve(7),placeindicatorplate(6)
overthedetentplate.Makesurethearrow points di-
rectly at the number 1 on the locating plate.
3.
damage to the sealing surfaces, damaged threads, and
contamination.
Visually inspect the port in the manifold (27) for
F. On directional cartridge cartridge valve (13),
place indicator plate (19) over the detent plate.
Make sure the arrow points to the right at 45o.
4.
aged sealing surfaces and contamination.
Visually inspect cartridge valve (7 or 13) for dam-
G. While pushing down on the indicator plate (6 or
A. Contamination may cause valves to stick or
hang up, it can become lodged in small valve ori-
fices or seal areas causing malfunction.
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
B. If sealing surfaces appear pitted or damaged,
the hydraulic system may be overheating or there
may be water in the system.
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.
CAUTION
I. On directional cartridge valve (7), turn knob (17)
counterclockwise so the arrow is 90o with the back
of the manifold (27). Simultaneously tighten upper
jam nut (18) and turn knob so itis tightand thearrow
is pointing 45o to the right in line with the indicator
Use eye protection such as goggles when using
compressed air.
5.
If necessary, clean cartridge valve (7 or 13) using
plate (6).
clean mineral spirits. Submerge valve in clean mineral
spirits toflush outcontamination. Particles asfineastal-
cum powder can affect the operation of high pressure
hydraulic valves. Use compressed air for cleaning.
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)
andturnknobsoitistightandthearrowispoint-
ing at the number “1” on the locating plate (19).
Greensmaster 3250--D
Page 4 -- 97
Hydraulic System (Rev. I)
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| Language | English |
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