5. RCV LEVER Notes 1. It is desirable to replace seal materials, such as O-rings, every disassembling. However, they may be reused, after being confirmed to be free of damage. 6-25 Maintenance check item Criteria Remark Leakage The valve is to be replaced when the leakage becomes more than 1000 cc/m at neutral handle position, or more than 2000 cc/m during operation. Conditions : Primary pressure : 30 kgf/cm2 Oil viscosity : 23 cSt Spool This is to be replaced when the sliding surface has worn more than 10 μm, compared with the non-sliding surface. The leakage at the left condition is estimated to be nearly equal to the above leakage.
Push rod Ø7 1 mm This is to be replaced when the top end has worn more than 1mm. Play at operating section The pin, shaft, and joint of the operating section are to be replaced when their plays become more than 2 mm due to wears or so on. When a play is due to looseness of a tightened section, adjust it. Operation stability When abnormal noises, hunting, primary pressure drop, etc. are generated during operation, and these cannot be remedied, referring to section 6 troubleshooting, replace the related parts.