STRUCTURE, FUNCTION, & MAINTENANCE STANDARD SELF PRESSURE REDUCING VALVE 12 VARIABLE PRESSURE COMPENSATION VALVE 1. Valve 2. Spring 3. Sleeve 4. Poppet 5. Spring 6. Screw 7. locknut 8. Plastic cap Function It is possible to adjust the division of the oil flow to the service valve when the service valve (for attach- ment) is operated together with the main control valve (boom RAISE etc.). (Variable in proportion to surface area) The pump pressure leaving the service valve spool acts on the left end of valve(1), and at the same time passes through throttle A and enters chamber G. The maxium LS pressure passes through throttle D and enters chamber E.
At the same time, the cylinder port pressure passes through passage C and throttle F, and goes to chamber H. In addition, the force of spring (2) acts on valve (1), and the force of spring (5) acts on poppet (4). The force of spring (5) can be adjusted with screw(6). PC210/240-7K 10-89