Product Code: PROTL500A
Made in China to TQB Brands Pty Ltd specifications
Page 10
Visit us at www.tqbbrands.com.au
TROUBLESHOOTING
Problem
Symptom
Cause
Conclusion
Solution
Lifter will not
lift using foot
pump
Pump has no
resistance, lift ram
will not raise
Release pedal valve
pin obstructed
Air in hydraulic system
Load weight exceeds
lift capacity
Pump circuit
protection valve
actuated
Overload actuated
Dirt under release pin
retainer
Air cavitation in pump
and/or lift ram
Higher capacity lifter
required
Pump circuit protection
valve needs reset
Relief valve needs reset
Hold pedal down and
clean out pin cavity
with an air duster
Bleed system as per
instructions
Select higher
capacity lifter
Depress release
pedal, valve will
reset
Contact qualified
technician for repairs
Lifter will not
hold load
Load cannot be
sustained, lift ram
drops under load
Pump pedal 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
Lifter will not
lower after
unloading
Lift ram rises after
retracting
Lift ram will not
retract
Reservoir overfilled
and breather closed
Breather closed
Ram failure due to
reservoir pressurised
caused by excess
reservoir level and closed
breather valve
Breather closed causing
hydraulic lock
Fully retract ram and
drain excess oil and
bleed system as per
instructions
Open breather and
bleed system
Contact qualified
technician for repairs
Poor lift
performance
Pump has no
resistance, lift ram
will not raise to full
stroke
Fluid level low
Air trapped in system
breather closed, pump
failure due to
cavitation caused by
air pressure build up
in reservoir
Fill fluid to correct level
Lift ram raised for
extended period causing
air ingress to hydraulic
system
Fill fluid to correct
fluid level and bleed
system
With ram fully
retracted, open the
breather to let
pressurised air
escape bleed system
Contact qualified
technician for repairs
