GENERAL
I-10REV. 1
CAUTIONS DURING REMOVAL AND
INSTALLATION OF PIPING
1. When hydraulic hoses are installed, tighten them
once to the prescribed torque, then loosen them
slightly and retighten them to the prescribed
torque.
• Tighten the fittings after the installation sur-
faces fit snugly together.
• Pieces wrapped with seal tape are excluded.
2. Use 2 spanners, each on an opposite side, to
remove and tighten fittings so that the hoses or
steel pipes are not twisted.
3. After installation of hydraulic hoses or steel pipes,
apply the maximum working pressure 5 or 6 times
and confirm that there is no leakage.
HANDLING OF SEALS
1. Clean the grooves for O-rings and if there is any
burr, etc., remove it.
2. Be careful not to twist O-rings. If an O-ring is
twisted, remove the twist with the fingertips.
3. During insertion, be careful not to damage the
seal.
4. Handling of Floating Seals
• Wipe all oil off the O-ring and housing of the
floating seal.
• When assembling, apply a thin coating of gear
oil to the contact surface of the housing.
• After assembly, turn the seal 2 or 3 times to get
it to fit snugly.
5. Apply grease to the lip of the oil seal.
• This is to prevent wear when it is first started up
after assembly.
GREASE
DIRT
BURR
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