Poweramp HED SERIES HYDRAULIC - Manual (Page 41)

39 Manual No. 4111-0027
Sept. 2009
May 2012
39
TROUBLESHOOTING
Symptom Solution
Unit raises but the lip plate will not retract.
Turn sequence valve clockwise approximately 1/4 turn and
retest unit. If the lip plate still will not retract, repeat the above
adjustment until unit operates properly. Unit raises but the lip
plate will not extend.
The unit raises slowly, the motor is extremely
noisy, and the hydraulic hoses are vibrating.
Check the fluid level in power unit reservoir, if low, add fluid and
operate leveler several times to remove any air from the system.
Lip Plate will not stay extended.
Turn sequence valve clockwise in 1/2 turn increments until lip
plate remains extended, but is still yieldable to approximately thirty
pounds of downward force.
The lip plate extends before the unit reaches
full dock height.
Turn sequence valve clockwise in 1/2 turn increments until lip
plate operates properly.
The motor runs but the unit will not raise.
Check the motor for reverse polarity wiring. Consult the wiring
diagram located on the motor and reverse polarity according to
the diagram. (three phase only)
Check Fluid levels.
Unit raises very slow. Check for voltage drop due to wrong size wiring. Check fluid level.
Unit raises but leveler shuts off during
operation cycle.
Check the overload relay located in the control box and adjust if
necessary.
Unit will not raise to full dock height.
Check fluid level in reservoir. Fluid level should be three inches
below the top of the reservoir with all cylinders fully extended.