05/20
BBJ50TA
Made in China to TQB Brands Pty Ltd specifications
P a g e
|
9
Visit us at www.tqbbrands.com.au
TROUBLESHOOT
Problem
Symptom
Cause
Conclusion
Solution
Jack will not
lift using
manual
pump
Manual pump has
no resistance, lift
ram will not raise
Release valve not
tightly closed
Air in hydraulic system
Load weight exceeds
lift capacity
Overload actuated
Bypass through release
valve
Air cavitation in pump
and/or lift ram
Higher capacity jack
required
Relief valve needs reset
Ensure release valve
tightly closed
Bleed system
Select higher
capacity jack
Contact qualified
technician for repairs
Jack Will Not
Lift using Air
pump
Air Pump operating
but lift ram will not
raise
Release valve not
tightly closed
Air in hydraulic system
Load weight exceeds
lift capacity
Overload actuated
Air Motor effected by
water in air supply.
Air exhausting but
motor not pumping.
Bypass through release
valve
Air cavitation in pump
and/or lift ram
Higher capacity jack
required
Relief valve needs reset
Lubrication flushed out of
air motor, requires added
lubrication.
Adding lubrication to air
motor fails to remedy
issue.
Ensure release valve
tightly closed
Bleed system
Select higher
capacity jack
Contact qualified
technician for repairs
Install air /water
separator to air
supply.
Follow Lubrication
instructions.
Jack will not
hold load
Load cannot be
sustained, lift ram
drops under load
Pump handle rises
Release valve not
tightly closed
Damaged main seal
Main check valve
obstructed
Bypass through release
valve
Replace main ram seals
Replace main check valve
ball and reseat valve seat
Ensure release valve
tightly closed
Contact qualified
technician for repairs
Jack will not
lower after
unloading
Ram rises after
retracting
Release valve pin
seized
Reservoir overfilled
Linkages binding
Pump failure due to
cavitation caused by
excess reservoir level
Dry release valve pin
Drain fluid to proper
level
Lubricate release
valve with 32grade
hydraulic oil
