Disassembly And Reassembly; Disassembly And Reassembly Precautions - Yanmar 3JH4E Service Manual

4. Disassembly and reassembly

4. Disassembly and reassembly

4.1 Disassembly and reassembly precautions

(1) Disassembly
• Take sufficient time to accurately pin-point the cause of the trouble, and disassemble only those
parts which are necessary.
• Be careful to keep all disassembled parts in order.
• Prepare disassembly tools.
• Prepare a cleaner and a cleaning can.
• Clear an adequate area for parts and prepare a container(s)
• Drain coolant (seawater, fresh water) and lube oil.
• Close the seacock
(2) Reassembly
• Sufficiently clean and inspect all parts to be assembled.
• Coat sliding and rotating parts with new engine oil when assembling.
• Replace all gaskets and O-rings.
• Use a liquid packing agent as necessary to prevent oil/water leaks.
• Check the oil and thrust clearances. etc. of parts when assembling
• Make sure you use the correct bolt/nut/washer.
• Tighten main bolts/nuts to the specified torque. Be especially careful not to over tighten the
aluminum alloy part mounting bolts.
• Align match marks (if any) when assembling. Make sure that the correct sets of parts are used for
bearings, pistons, and other parts where required.
122