SC75 & SC105 Soft Start Valve
IS-SC105
SC75
Figure 3
SC105
Solenoid Nut
(Finger Tight)
Solenoid
Cover
Plunger Assembly
Spring
Body
Bottom Spring
Screw
Torque: 2.8 to 4.5 Nm
(25 to 40 in. lb.)
O-ring*
O-ring*
O-ring* (2)
Spool Assembly
O-ring* (2)
Gasket*
Disc Holder
Assembly*
Bottom Plug
Torque: 4.5 to 6.8 Nm
(40 to 60 in. lb.)
Solenoid
Solenoid Nut
(Finger Tight)
Cover
Plunger Assembly
Spring
Body
Bottom Spring
Screw
Torque: 2.8 to 4.5 Nm
(25 to 40 in. lb.)
O-rings*
O-ring*
O-ring*
Spool Assembly
O-ring* (2)
Gasket*
Disc Holder
Assembly*
Bottom Plug
Torque: 4.5 to 6.8 Nm
(40 to 60 in. lb.)
3
Caution: Grease packets are supplied with kits for
lubrication of seals. See Factory Pre-lube on Sheet 1. Do
not use silicones.
Note: After servicing unit, turn on air supply and check for leaks.
If leakage occurs, do not operate – conduct repairs and
retest.
Note: Items marked with an * are included in the service kit.
1. Remove the four Screws that retain the Cover and remove
Cover. Next remove Plunger with Seals from Body.
2. Remove Bottom Plug by unscrewing it from the Body. Next
remove Bottom Spring, Disc Holder Assembly and Gasket.
3. Clean, and carefully inspect parts for wear and / or damage.
If replacement is necessary, use parts from service kit.
4. Lubricate O-rings and U-cup with grease (supplied with kit).
5. Install Gasket into Body. Then install Disc Holder, Bottom Spring
and Bottom Plug in to Body. See Figure 3 for torque value.
6. Install Plunger with Seals into the Body. Install two O-rings
between Body and Cover (make sure air passages are aligned
properly), install four Screws and tighten per Figure 3.
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