TOHATSU TLDI MD 115A SERIES Service Manual page 43

Functional Limit
When the valve opens even slightly at ambient temperature
Check valve opening temperature by immersing the thermostat in
water and gradually increasing water temperature
When the tips or upper and lower surface lip areas show wear,
cracks or damage
When anode shows excessive corrosion
0.4mm (0.016 in)
When depth of wear is 0.1 mm (0.004 in)
When lip area shows deterioration, heat discoloration, or damage
or when reduces interference to 0.5 mm (0.02 in) or less
TLDI 115A 2007
Action To Be Taken
Replace with new part.
Replace with new part.
Replace with new assembly.
Replace when wear is excessive.
Replace when wear is excessive.
Replace with new part.
Replace with new part.
Adjust or replace with new parts.
Replace if over specified limit.
Replace with new part.
Replace with new part.
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