Poweramp POWERHOLD 4.2009 - Manual (Page 36)

Symptom Possible Cause Solution
Platform rises slowly. Low hydraulic fluid. Add fluid, see Maintenance section for proper fluid
level and type.
Contaminated hydraulic
system. Clean and inspect valves. Flush contaminated oil
from hydraulic system. Fill system with new oil. See
Periodic Maintenance in the Maintenance section.
Damaged or restricted
hydraulic hose(s). Replace damaged hose(s). Remove restriction.
Pressure relief set too low. Increase pressure relief. See Adjust Main Pressure
Relief in the Adjustment section.
NOTE: The pressure relief valve must not be set at
a level that causes the motor operating
current to exceed the full load amp value* at
any time, including when operating in
pressure relief.
* The full load amp value can be found on the inside cover of the
control panel.
Pump motor loads down
when platform reaches
the full raised position. Pressure relief set too high. Decrease pressure relief. See Adjust Main Pressure
Relief in the Adjustment section.
NOTE: The pressure relief valve must not be set at
a level that causes the motor operating
current to exceed the full load amp value* at
any time, including when operating in
pressure relief.
* The full load amp value can be found on the inside cover of the
control panel.
Shoe does not rise to full
height. Low hydraulic fluid. Add fluid, see Maintenance section for proper fluid
level and type.
Platform DOES rise to full
height, but lip DOES NOT
extend or extend fully. Low hydraulic fluid. Add fluid, see Maintenance section for proper fluid
level and type.
Logic block (valve) lever
cable weight too low on
cable. Adjust cable weight. See Adjust Cable Weight and
Down Speed Control in the Adjustment section.
TROUBLE SHOOTING DOCK LEVELER
4111-0016 — November,2008 34