Anthony Liftgates AC-1600, Maintenance Manual

Troubleshooting Chart

Problem

Possible Causes

Possible Solution

Motor runs, but platform will not raise, 

will not raise rated capacity, or raises 

but drifts down when control switch is 

released.

Load capacity has been exceeded.

Verify load capacity and reduce load 

weight.

Structural damage.

Replace damaged parts. Refer to the 

separate Parts Manual.

Low fluid level.

Fill reservoir with proper fluid. Refer to 

“4.1 Monthly Inspection” on page <?> 

for oil specifications and “4.3 Check 

Power Module Fluid Level” on page 

<?> for oil level.  

Low Voltage.

Inspect the battery connection 

terminals and check the battery’s 

Voltage (9 Volts minimum).

Lowering valve (power down models 

only).

Valve may not be fully closing. Cartridge 

may need cleaning or replacement.  See  

section “4.9 Checking Valve Cartridge and 

Solenoid” on page <?>.  

Replacement part — A‑130216

Defective piston seals.

Cylinder piston seals are damaged 

allowing fluid to leak past piston when 

raising platform. Replace the cylinder, 

repair is not practical. Refer to section 

“4.12 Checking Cylinder Piston Seals” on 

page <?>. 

Replacement part — A‑130113 Cylinder 

3” or A‑130114 Cylinder 4”.

Hydraulic pump is worn.

Replace power unit.  

Replacement part — A‑130117 Power 

Down or A‑130116 Gravity Down.

Platform raises partially and stops.

Load capacity has been exceeded.

Verify load capacity and adjust load 

weight.

Structural damage.

Replace damaged parts. Refer to the 

separate Parts Manual.

Low Voltage.

Recharge battery (if less than 9 Volts).

Low pressure.

Fill reservoir with proper fluid. Refer to 

“4.1 Monthly Inspection” on page <?> 

for oil level and oil specifications. Also 

check pump and motor. “4.1 Monthly 

Inspection” on page <?>.

Platform will not lower.

Platform operating area is not clear.

Clear area.

Structural damage.

Replace damaged parts. Refer to the 

separate Parts Manual.

Low Voltage.

Recharge battery (if less than 9 Volts).

Lowering valve (power down models 

only).

Solenoid or cartridge may need 

cleaning or replacement.  Refer to 

section “4.9 Checking Valve Cartridge 

and Solenoid” on page <?>.  

Replacement part — A‑130216.

Hydraulic pump and motor.

Replace power unit. Refer to the 

separate Parts Manual.