Yanmar 3JH4E Service Manual page 83

Items
Scale solvent Scale solvent
Neutralizer
(caustic soda)
pH test paper
Antirust
Anti freeze
Cleaning agent
Usual Contents
1 box • The scale solvent removes scale in a short time.
(1 to 10 hours)
(4 kg × 4
• Prepare water (seawater is possible) in an
removers)
amount that is about 10 times the weight of the
1 box
solvent. Mix the solvent with water.
(2 kg × 4
• Just dipping disassembled part into removes
neutralizers)
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.
Add antirust to fresh water system. Then operate
engine for approximately 5 minutes. Antirust will be
effective for 6 months.
Add antirust to fresh water system at the cold area
to engine operate.
• 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.
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4. Disassembly and Reassembly
Features and application