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. 2. When loosening the hexagon socket head cap screw(125), replace the seal washers(121) without fail. 7-23 4. RCV LEVER Maintenance check item Criteria Remark Leakage The valve is to be replaced when the leakage becomes more than 1000cc/m at neutral handle position, or more than 2000cc/m during operation. Conditions : Primary pressure : 30 kgf/cm2 Oil viscosity : 23cSt Spool This is to be replaced when the sliding surface has worn more than 10µm, 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 2mm 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.