Hitachi NEXT Series Instruction Manual page 81

Clean Coolers
9
Wire-Brush
9. MAINTAINING THE DSP [How to Service the DSP Air Compressor]
Oil Cooler
● Oil Cooler
Scale Removal
Remove the oil cooler water chamber cover. Flush
with Rydlymeand use a brass wire brush to remove
the scale from the inner surfaces of the oil cooler
tube nest.
● Aftercooler/Intercooler
If scale build up occurs often, contact the local
Hitachi distributor for scale removal.
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