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How to bleed air from system
1. Bleed air from ram: Place pump at a higher elevation than the hose and ram (refer to figure 4). The objective is to
"float the air bubbles up hill and back to the reservoir where they belong. Close valve and extend ram as fast 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 filler screw to let pressurized air escape, then reinstall oil
filler screw.
How to remove faulty coupler
If ram does not retract, secure load by other means. Open pump release valve to depressurize pump and hose. To
avoid hydraulic oil from spilling, wraps the grasping tool with rags or similar padding. Remove the ram from
application. Disconnect and replace with new coupler.
Figure 4 - Pump and ram illustration to bleed air
TROUBLESHOOTING
Symptom
Possible Causes Corrective Action
Ram will not extend
Ram will not lift to full extension
Spongy effect
Ram *bleeds off after lift
Handle kick-back
Ram will not lower after
unloading
Poor performance
• Release valve not tightly closed
• Overload condition
• Fluid level low
• Air trapped in system
• Release valve not tightly closed
• Dirt in pump's return check valve
• Hydraulic unit malfunction
• Dirt in return check valve
• Reservoir overfilled
• Damage coupler
• Bent plunger/ ram damaged
• Fluid level low
• Air trapped in system
• Ensure release valve tightly closed
• Remedy overload condition
• Ensure proper fluid level
• Bleed air from system
• Ensure release valve tightly closed
• Flush the system
• Replace ram/pump or, contact service
center
• Flush the system
• Drain fluid to proper level
• Replace coupler
• Replace ram
• Ensure proper fluid level
• Bleed air from system
* "Bleeds off" means that ram begins to slowly retract rather than maintain position
