Yanmar 3YM30, Service Manual

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4. Disassembly and reassembly
76R1
[Notice]
It is recommended that the liquid gasket of Three Bond TB1212 should be used for service work.
Before providing service, observe the cautions below:
1) Build up each gasket equally.
2) For a bolt hole, apply liquid gasket to the inside surface of the hole.
3) Conventionally, Three Bond TB1104 (gray) or Three Bond
TB1102 (yellow) is used for paper packing though single use of one of these bounds is not effective.
4) If conventional packing is used, do not use liquid packing.
Items Usual contents Features and application
Scale solvent Scale solvent 1 box
(4 kg
×
4
removers)
• The scale solvent removes scale in a short time.
(1 to 10 hours)
• Prepare water (seawater is possible) in an
amount that is about 10 times the weight of the
solvent. Mix the solvent with water.
• Just dipping disassembled part into removes
scale.
To shorten removal time, stir remover mixture.
• If cleaning performance drops, replace remover
mixture with new remover mixture.
• Neutralize used mixture, and then dispose of it.
To judge cleaning performance of mixture, put
pH test paper into mixture. If test paper turns
red, remover mixture is still effective.
Neutralizer
(caustic soda) 1 box
(2 kg
×
4
neutralizers)
pH test paper
Antirust Add antirust to fresh water system. Then operate
engine for approximately 5 minutes. Antirust will be
effective for 6 months.
Anti freeze Add anti freeze to fresh water system at the cold
area to engine operate.
Cleaning agent • The cleaning agent removes even carbon
adhering to disassembled parts.
• If a cleaning machine is used, prepare 4 to 6%
mixture of 60° to 80° to ensure more effective
cleaning.
Oil pan mating surface
Buildup of TB1212
Outside
Inside
(Inside of oil pan)