Vestil AIR-2000 - Manual (Page 6)

rev. 1/25/2013 AIR-2000-AIR, manual.doc
Copyright 2013 Vestil Manufacturing Corp. Page 6 of 10
TROUBLESHOOTING GUIDE
WARNING: Carelessness during maintenance could result in serious injury.
 Identify all potential hazards and apply the safety procedures used at your work site before
beginning troubleshooting or repairs. Disconnect / disable all energy sources with proper
lock-out/tag-out procedures
 Before performing any troubleshooting or repairs, the load must be removed from the platform;
then either raise the platform and install the maintenance props, or fully lower the platform.
 Only qualified individuals trained to understand mechanical devices and their associated electrical
and hydraulic circuits, along with the hazards that could result from them, should attempt
troubleshooting and repair of this equipment.
Contact the factory for answers to questions not addressed in this manual
Problem: Possible cause(s): Action:
1. Platform does not raise a. Load weight exceeds capacity
b. Oil is low
c. Pinched hose
d. Relief valve set too low
a. Remove part of the load
b. Fill oil to within on inch of the top
of the reservoir
c. Connect as necessary
d. Increase only as necessary
2. Foot pedal goes down hard
but platform does not rise
a. Particle of dirt under the pressure
relief
b. Particle of dirt under the inlet check
a. Lower platform – disassemble,
clean & reassemble pressure
relief.
b. Lower platform – disassemble
clean & reassemble inlet check
valve
3. Platform rises only under no
load or when rapidly pumped
or
Pedal strokes without
being pumped.
a. Pump is “air locked”.
b. Inlet check valve has foreign
material on seat
c. Relief setting is out of adjustment
d. Foreign material on relief valve set
a. Bleed air from system
b. Remove and clean inlet ball and
seat.
c. Adjust relief setting higher
d. Lower platform – disassemble
clean & reassemble inlet check
valve
4. Platform rises when the
pump is stroked but lowers
during the return stroke.
a. Outlet check is leaking. a. Clean foreign material from ball
and seat.
5. Platform rises but takes too
much effort
a. Switch pump displacement speed. a. Slide locking collar back