STRUCTURE, FUNCTION, & MAINTENANCE STANDARD CONTROL VALVE Unit: mm No.
Remedy 21 22 23 If damaged or deformed, replace spring 24 25 26 27 28 PC210/240-7K 10-79 Check item Criteria Regeneration valve spring Standard size Repair limit Free length x Out- side diameter Installed length Installed load Free length Installed load 31.5 x 10.3 19 6.2 N {0.6 kg} — 4.9 N {0.5 kg} Piston return spring 48.1 x 10.8 28 17.5 N {1.8 kg} — 14.0 N {1.4 kg} Piston return spring 36.9 x 11.1 28 29.4 N {3 kg} — 23.5 N {2.4 kg} Load spring 30.4 x 16.7 27 428.3 N {43.7 kg} — 343 N {35.0 kg} Check valve spring 13.6 x 5.5 10 3.0 N {0.3 kg} — 2.4 N {0.25 kg} Check valve spring 33.0 x 12.0 26 35.3 N {3.6 kg} — 28.2 N {2.9 kg} Check valve spring 16.4 x 8.9 11.5 13.7 N {1.4 kg} — 11.0 N {1.1 kg} Spool return spring 30.7 x 20.5 23 50.0 N {5.1 kg} — 40.0 N {4.1 kg}