30
NOTE
• Tighten the pump head bolts (parts# 20) when a leak is found from the pumphead-bracket seal. See the
exploded view pages for the rated tightening torque at each pump model. If it can't stop a leak, replace the
diaphragm.
• A leak from the vent hole is the sign of diaphragm rupture. Stop the pump immediately and replace the dia-
phragm.
Oil replacement (drive unit)
Replace the lubricating oil in the drive unit every 4000 hours operation or 1 year after delivery, whichever
comes first.
• When the first time the pump is used, replace the oil after 500 hours of running-in period to remove initial
abrasion powder. Or abnormal wear may be caused.
• The specified oil volume is about 220mL.
NOTE
Always use the oil brand below. Otherwise, pump damage or in the worst case fair may result.
Specified oil brand
Oil company
Brand name
SUMICO LUBRICANT CO., LTD.
Molyoil F320
Pump head
Vent hole
Bracket
Pumphead-Bracket seal
Pump head bolt
Inspection