Hello everybody
I got some Hyster H3,5FT trucks with Yanmar 4TNE98-NMW engines.
Example truck No - L177B21293E
The engine overheats after 20-30 minutes of work.
The thermostat is OK, water pump is OK, the cooller is clean.
The air pressure (pretty high) appeares on oil filler (after the cap removal) and dipstick.
Is it possible to deaerate the system?
My service guy cannot find any vent.
The issue is, we have the same problem with two trucks in different locations (the same customer). So it looks like some typical problem.
I would appreciate any help.
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