Sakai CR271, Shop Manual

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6-001
DRUMS
1. PRECAUTIONS FOR DISASSEMBLY AND REASSEMBLY
• When removing, installing, disassembling or reassembling the unit, observe the general
precautions described below.
1) Precautions for removal work
• Coolant that contains antifreeze should be treated as a chemical, and must not be drained
carelessly on the ground.
• To prevent dust from getting into disconnected hoses and tubes, cover them with a plug or similar
means.
• When draining oil, use a receptacle with sufficient capacity to receive it.
• Before proceeding with the work, look for matchmarks that show the installation location. For
reassembly, place matchmarks in the required locations to prevent errors. Then remove.
• When disconnecting wiring connectors, hold the connector components so that unreasonable force
is not applied to the wires.
• Label wires and hoses to ensure correct installation location.
• Confirm the number and thickness of shims prior to storage.
• When lifting parts, use lifting equipment of sufficient capacity.
• When separating parts by using pull bolts, tighten the bolts alternately.
• Before removing a unit, clean its surrounding area. Then after removal, cover it to prevent dust
and other substances from getting in.
• Before removing piping for hydraulic oil or coolant, or removing related parts, satisfactorily release
internal pressure.
2) Precautions for installation work
• Tighten bolts and nuts (sleeve nuts) to the specified torque (screw tightening torque table).
• When installing hoses, do not twist them or allow them to interfere with other parts.
• Replace gaskets, O-rings, split cotter pins, and lock plates with new parts.
• Properly bend split cotter pins and lock plates.
• When applying an adhesive, first clean and remove oil/grease from the surfaces properly. Then
apply two or three drops to the threaded areas.
• When applying a liquid gasket, first clean and remove oil/grease from the application surface
properly, and confirm that the surface is free of dust and damage. Then apply the product evenly.
• Clean parts well. Repair scratches, dents, burrs, rust, etc.
• Apply gear oil to rotating and sliding components.
• Apply grease to the surfaces of press-fit parts.
• After installing snap rings, confirm that they are properly seated in the grooves.
• Connect wiring connectors securely after cleaning off adhering oil, dust and water.
• Use lifting bolts that are not fatigued or deformed. Screw them in fully.
• When tightening a split flange, tighten screws alternately to prevent uneven tightening.
• Before installing hydraulic parts, confirm that they are free of damage and dust, etc.