6
TROUBLESHOOTING GUIDE
The following information is intended as an aid in determining if problem exists. For repair service, contact Atd Tools
service center in your area.
Symptom
Possible Causes
Corrective Action
Ram will not extend, or respond
to pressurized uid
Ram responds to pressurized
uid, but system does not
maintain pressure
Ram will not return uid to pump
Ram will not fully extend
(cylinder or spreader)
Poor performance
• Overload condition.
• Release valve not closed.
• Overload condition.
• Release valve not closed.
• Hydraulic unit malfunction.
• Malfunctioning coupler,
damaged application.
• Reservoir overlled.
• Fluid level low.
• Fluid level low.
• Air trapped in system.
• Remedy overload condition.
• Ensure release valve closed.
• Remedy overload condition.
• Ensure release valve closed.
• Contact Service Center.
• Secure load by other means. Open
release valve, depressurize pump
and hose, remove application and
replace coupler.
• Secure load by other means. Open
release valve, depressurize pump
and hose, remove application, then
drain uid to proper level.
• Secure load by other means. Open
release valve, depressurize pump
and hose, remove application, then
add uid to proper level.
• Ensure proper uid level.
• Vent the sytem (refer to gure 3)
How to bleed air from system
1. Bleed air from ram: Place pump at a higher elevation than the hose and ram as shown in gure 3 below. The
objective is to “oat the air bubbles up hill and back to the reservoir where they belong. Close valve and extend
ram as fas as possible. Open valve fully allowing oil and air to return to reservoir. Repeat this procedure two or
three times will do the trick.
2. Bleed air from pump: With ram fully retracted, remove oil ller screw to let pressurized air escape, then reinstall
oil ller screw.
Figure 3 - Pump and ram illustration to bleed air
Lubrication
A coating of light lubricating oil to pivot points and
hinges will help to prevent rust and assure that pump
assemblies move freely.
Cleaning
Periodically check the pump piston and ram for signs
of rust or corrosion. Clean as needed and wipe with
an oily cloth.
Note: Never use sandpaper or abrasive material on
these surfaces!
Storage
When not in use, store with the pump piston and ram
fully retracted.
