Dual cushion lock assembly


Function for YCCD
Port Designators [ + ]
Modifiers Ports
B, B/S Ports C1, C2, V1, V2: 3/8" NPTF; Port T: 1/2" NPTF;
C, C/S Ports C1, C2, V1, V2: 1/2" NPTF; Port T: 1/2" NPTF;
I, I/S Ports C1, C2, V1, V2: SAE 6; Port T: SAE 10;
J, J/S Ports C1, C2, V1, V2: SAE 8; Port T: SAE 10;
K, K/S Ports C1, C2, V1, V2: SAE 10; Port T: SAE 10;
U, U/S Ports C1, C2, V1, V2: 3/8" BSPP; Port T: 1/2" BSPP;
V, V/S Ports C1, C2, V1, V2: 1/2" BSPP; Port T: 1/2" BSPP;
Technical Features [ + ]

This valve assembly provides overrunning load-control, load-port relief protection, supplies make-up oil, and flushes hot dirty oil out of the actuator. All oil coming out of the actuator returns to tank through port T.

  • The counterbalance valves should be set at 1.3 times the maximum load induced pressure.
  • The term cushion in the name Cushion Lock is a misnomer. Because the counterbalance valves play a dual role as load controls and work port reliefs they must be set too high to provide any real cushion. Deceleration can only be achieved by ramping down the input flow.
  • This assembly is ideal for applications with long lines to the actuators. Mounting the assembly close to an actuator ensures that cool, clean oil will be supplied to the actuator and that the hot, dirty oil will go out the T port to the tank
  • These packages are also available as 3 letter manifolds. Look under counterbalance.
Technical Data [ + ]
Body Type Line mountLine mount
Capacity 15 gpm60 L/min.
Mounting Hole Diameter .34 in.8.6 mm
Mounting Hole Depth ThroughThrough
Mounting Hole Quantity 22
FAQs [ + ]

There are exactly 250 Sun drops in a cubic inch or 15 in a cc.

Direct-acting valves are used to prevent over pressure, and pilot-operated valves are used to regulate pressure. If you are unsure, use a direct-acting valve. Sun's direct acting valves are very fast, dirt tolerant, stable, and robust. Sun's pilot-operated valves are moderately fast, they have a low pressure rise vs. flow curve, and they are easy to adjust.

Additional Resources [ + ]