UNIT TROUBLESHOOTING - CONTINUED
TEST OR INSPECTION
HYDRAULIC PUMP ACTION SOLID FOR SEVERAL STROKES, THEN MUSHY
Check hydraulic fluid level in reservoir (2).
Refill hydraulic fluid in reservoir (2) up to line.
AIR MOTOR FAILS TO CYCLE
Step 1. Check external air pressure applied to hydraulic pump assembly air motor (1).
If air pressure is low (less than 60 psi), increase air pressure (60 to 120 psi is
desirable). If air pressure is within desired range, go to step 2.
Step 2. Check if air lines leak or are clogged.
Replace lines or remove restrictions in air lines.
If lines remain restricted, add small amount of SAE 30 oil through air inlet
(2). Plug exhaust with fingers and allow pressure to build up. Then,
remove fingers quickly.