Hyundai 35DS-7 Operation Manual page 187

Hand tighten M8 bolt.
Tightening torque : 2.5kgf m(18.1lbf ft)
Tighten them up while making sure that
spools of each block work smoothly.
(2) Replacing O-ring and scraper, which
are fitted in spool
On the lever side
Loosen mounting M5 hexagon screw on
seal case, and remove seal case.
Renew scraper(SER16) and O-ring
(1AxP16)
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