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I-10
GENERAL
CAUTIONS DURING REMOVAL AND INSTAL-
LATION 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.
BURR
DIRT
Y2-A105E
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.
Y2-A106E
GREASE
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