STRUCTURE, FUNCTION, & MAINTENANCE STANDARD CONTROL VALVE Unit: mm No.
Remedy 18 19 20 If damaged or deformed, replace spring 21 22 23 24 PC210/240-7K 10-75 Check item Criteria Relief spring Standard size Repair limit Free length x Out- side diameter Installed length Installed load Free length Installed load 34.7 x 10.4 32.3 430.2 N {43.9 kg} — 344.2 N {35.1 kg} Valve spring 10.45 x 7 4.8 3.1 N {0.32 kg} — 2.5 N {0.26 kg} Unload spring 31.5 x 10.2 26.9 70.6 N {7.2 kg} — 56.4 N {5.8 kg} Regeneration valve spring 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 56.4 x 11.9 45 79.4 N {8.1 kg} — 63.5 N {6.5 kg} Piston return spring 36.9 x 11.1 28 29.4 N {3 kg} — 23.5 N {2.4 kg}