STRUCTURE, FUNCTION, & MAINTENANCE STANDARD CONTROL VALVE Unit: mm No.
Remedy 17 18 19 20 If damaged or deformed, replace spring 21 22 23 24 PC210/240-7K 10-67 Check item Criteria Valve spring Standard size Repair limit Free length x Out- side diameter Installed length Installed load Free length Installed load 24.3 x 8 19.5 69.6 N {7.1 kg} — 55.7 N {5.7 kg} Unload spring 31.5 x 10.2 26 83.4 N {8.5 kg} — 66.7 N {6.8 kg} Check valve spring 11.5 x 4.6 8.5 1.5 N {0.15 kg} — 1.2 N {0.12 kg} Spool return spring 46.6 x 21.8 3.3 156.8 N {16.0 kg} — 125.5 N {12.8 kg} Spool return spring 64.5 x 32.3 63 177.5 N {18.1 kg} — 142.0 N {14.5 kg} Sequence valve spring 70.9 x 18.0 59 199.8 N {20.4 kg} — 160.0 N {16.3 kg} Spool return spring 29.9 x 11.0 10.7 10.4 N {1.1 kg} — 8.3 N {0.8 kg} Relief spring 34.7 x 10.4 32.3 430.2 N {43.9 kg) — 344.2 N {35.1 kg}