Cause / 705

1. Sucking air and oil. (Foamy oil causing cavitation) 2. Power unit loose on support. 3. Worn motor coupling. 4. Plugged suction filter. 5. Fan cover or motor damage.

Repair / 705

1. Change out old oil with new hydraulic oil. 2. Tighten mounting bolts. 3. Replace motor coupling. 4. Clean or replace filter. 5. Replace or repair.