
11921 Slauson Ave. Santa Fe Springs, CA. 90670 (800) 227-4116 FAX (888) 771-7713
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PLATFORM WILL NOT FOLD
1. Check the hydraulic fl uid level in the reservoir.
3. Verify that relief valve pressure settings are correct. Refer to RELIEF VALVE
PRESSURE SETTING procedure in this manual. Also, make sure fl ow control valve
(on pump) is open. Perform platform opening & closing speed adjustment procedure.
If pressure settings can’t be corrected, if platform opening and closing speed can’t be
adjusted or if pump runs hot and excessively noisy, replace pump.
GRAVITY DOWN LIFTGATES: Lower the platform to the ground. Clean dirt and fl uid
from top of reservoir in pump box. Fill the reservoir to correct level indicated on sight
glass (pump box).
POWER DOWN LIFTGATES: Raise the platform to bed height. Fill the reservoir to
correct level indicated on sight glass (pump box).
2. Check pump motor solenoid (FIGS. 61-1 and 61-2) in pump box and bus bar
connections in pump box. Make sure bus bar connections are clean and tight. Use a 6”
long, 10 gauge insulated wire as a jumper between motor solenoid terminals “C” and “A”
to activate solenoid. Replace solenoid if it fails to activate.
NOTE: For dual pump system, check secondary pump and motor fi rst.
TROUBLESHOOTING
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