Assembly
Assembly is generally performed in reverse order of
disassembly. Refer to figure IDCS015B during the
following assembly procedure.
NOTE : Coat all parts with clean hydraulic oil to
facilitate assembly and provide initial lubrication.
Petroleum jelly can be used to hold seal rings in
place on assembly.
Valve Body
1. Install new O-ring (39) on plug (38) and install in
cylinder
“
b
”
work port. On models with a single
acting spool, install new O-ring (41) on the port
plug (40) and plug the appropriate cylinder port.
2. Tighten the plug (40) securely but DO NOT over
tighten.
3. On bodies with the quick disconnect option, install
new O-ring (46) on plug (45) and screw into bore.
4. Tighten the plug (45) to a torque of 97 - 106 N
¥
m
(71 - 78 lb
¥
ft).
5. Install new O-ring (44) on quick disconnect
coupling (43) and insert coupling into plug.
6. Tighten the coupling (43) to a torque of
29 - 31 N
¥
m (21 - 23 lb
¥
ft).
7. Install dust cap (42).
Secondaty Adjustable Relief Valve
1. Replace O-ring (34), piston (36) and spring (35) in
relief plug (30).
2. Insert poppet (37) in plug.
3. Install the O-ring (31) on the relief plug. Tighten the
plug securely in valve body. DO NOT over tighten.
CAUTION : Hex head of relief valve must be face
outside of unit.
Relief Valve
1. Install a new O-ring (27) on the relief valve plug
(26).
2. Place the relief valve assembly (29) in its bore,
HEX NUT END UP.
3. Install the spring (28) and plug. Tighten the plug
securely, but do not Over Tighten.
Optional Adjustable Flow Control Valve
1. Install a new back-up ring (20) and O-ring (21) on
the plug stop adjuster (19) with the O-ring toward
the spring (22) and seat (24).
2. Place the poppet (25) and spring in the body and
install the plug stop adjuster. Be sure the hole in
the plug lines up with the stud hole in the body.
3. Replace retaining ring (18).
Check Valve
1. Install a new back-up ring (20) and O-ring (21) on
the plug stop adjuster (19) with the O-ring toward
the spring (22) and ball (23).
2. Place the ball and spring in the body and install the
plug stop adjuster (19). Be sure the hole in the
plug lines up with the stud hole in the body.
3. Replace retaining ring (18).
Operating Spool
1. If the centering spring was removed, install spring
(16) and retainers (17) on the spool (13).
2. Slide the spool into the bore.
28 of 29
New Hydraulic Systems
Disassembly and Assembly
Summary of Contents for D20S-2
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