MRT Models
47
Anthony Lifgtates, Inc.
800-482-0003
www.anthonyliftgates.com
Troubleshooting Chart
Problem
Possible Causes
Possible Solution
Platform lowers extremely slow.
Defective flow control valve.
Readjust flow control valve (inside pump
box, in line of hydraulic hose). One
valve is for open and close speed, the
other is for lowering speed. Replace the
flow control valve. See the Flow Control
Valve section. (A-130184, A-130255).
Improperly adjusted flow control
valve.
Readjust flow control needle valve,
located in valve manifold, inside pump
box. If clogged, remove valve, clean, and
reinstall. Replace if needed. (A-176560,
A-130204, A-176681)
Improper oil in hydraulic reservoir.
Fill with proper oil. “7.1.1 Monthly
Inspection” on page 40.
Slide runners or wear strips are dirty,
damaged, or need oil.
Clean columns and oil slide runners with
30W motor oil. Replace slide runners or
wear strips if they are bent or damaged. .
Damaged or kinked hydraulic hose.
Repair or replace hose.
Cylinder rod is scored, pitted, or bent. Replace cylinder.
Flow control valve.
Remove flow control valve and hook
hydraulic hose directly to the cylinder. If
the cylinder operates properly, replace
the valve. “7.2.4 Raise/Lower Flow
Control Valve” on page 43.
Clogged or defective lowering valve.
Coil or cartridge may need cleaning or
replacement. “7.2.1 Check Lowering
Valve Cartridge And Coil” on page 42.
Platform raises partially and
stops.
Load capacity has been exceeded.
Verify load capacity and adjust load
weight.
Structural damage.
Replace damaged parts.
Low Voltage.
Recharge battery (if less than 9 Volts).
Low pressure.
Refill reservoir. Check pump and motor.
“7.1.1 Monthly Inspection” on page 40.
Platform will not close completely. Twisted platform hinge pin (hex pin).
Check to see if twisted by lowering
platform below column to see hex pin.
Check alignment of hex pin and lower
cylinder pin, should be in between
the 8 o’clock and 9 o’clock position
with platform open. If not, replace by
sawing pin in half and removing pin and
bushings. Replace hex pin and both hex
bushings.
Closure cylinder defective..
Replace cylinder. DO NOT repack or
dismantle.
Platform will not close at all,
motor does run.
Bad cartridge valve coil.
Remove coil from cartidge and test
magnetism of inside of coil with metal
object (screwdriver) while energizing
down control side of switch only.
Closer valve stuck in the closed
position.
With platform on the ground, remove
closing valve, clean and inspect. If
plunger not moving freely, replace valve.
