Table of Contents
Advertisement
Operator's Manual
Bleeding the hydraulic cylinder.
Air can enter the hydraulic system at any time its components are opened for service. Symptoms of air in the system
include erratic or bouncing motion of the platform, sponginess in holding position, unusual noises, or foaming in the
hydraulic fluid. Trapped air can also trigger the cylinder's velocity fuse, slowing or preventing the cylinder from lowering.
Cycling the platform up and down without a load can expel much of the trapped air through the hydraulic reservoir.
TROUBLESHOOTING GUIDE
Care should be taken to identify all potential hazards and comply with applicable safety procedures
before beginning work.
Remove any load and install the maintenance props before beginning any inspection or service on
the lift table. See below.
Only qualified individuals trained to understand mechanical devices, electrical and hydraulic circuits, and the hazards
associated with them, should attempt troubleshooting and repair of this equipment.
Consult the factory for any problems not addressed in this manual. ALWAYS have the product serial number or model
number on hand when calling the factory.
PROBLEM
Power unit doesn't run when "UP"
button is pressed.
Motor runs but platform doesn't
move. Power unit not noisy.
Table of Contents
2/2/21
POSSIBLE CAUSES
Transformer fuse is blown or circuit breaker
tripped.
No supply voltage.
Upper-travel limit switch is engaged or bad.
Bad control transformer.
Bad motor relay coil.
Motor rotation is wrong (3Ø).
Fluid level in reservoir is low.
Pump is failing to produce pressure.
Copyright 2021, Vestil Manufacturing Corp.
ACTION
Test with meter. Replace if bad. Check electric circuit for
source of fault.
Test with meter. Check fuses, breakers, and overloads to
determine the cause
Inspect and test switch. Replace if bad.
Check for 24 VAC at secondary. Replace if bad.
Test with meter. Replace if bad.
Verify the motor runs CW, opposite the shaft end.
Add fluid. Fluid should be 1" to 1-½" below the reservoir
fill hole with the platform in the fully lowered
position.
Consult factory.
EHLTX, MANUAL.DOCX
Page 29 of 32
Advertisement
Table of Contents
