5
TROUBLESHOOTING
Symptom
Possible Causes
Corrective Action
Jack will not lift load
• Release valve not
closed
• Overload condition
• Ensure release valve tightly
closed
• Relieve overload condition
Jack pressure bleeds
off after lift
• Release valve not
closed
• Overload condition
• Hydraulic unit
malfunction
• Ensure release valve tightly
closed
• Relieve overload condition
• Contact Customer Support
Jack will not lower
after unloading
• Reservoir overfilled
• Linkages binding
• Drain fluid to proper level
• Clean and lubricate
moving parts
Jack exhibits poor lift
performance
• Low fluid level
• Air trapped in system
• Ensure proper fluid level
• With lift arm fully lowered,
remove oil filler plug to
allow pressurized air to
escape, reinstall oil filler
plug
Jack will not lift to full
extension
• Low fluid level
• Ensure proper fluid level
MAINTENANCE
Important:
Use only a good grade
hydraulic jack oil (e.g. Mobil DTE 13M or
equivalent). Avoid mixing different types
of fluid and
Never
use brake fluid, turbine
oil, transmission fluid, motor oil or glycerin.
Improper fluid can cause failure of the
jack and the potential for sudden and
immediate loss of load.
Adding oil
1. With saddle fully lowered set jack in
its upright, level position. Locate and
remove oil filler plug.
2. Fill with oil until ~3/16” above the inner
cylinder as seen from the oil filler plug
hole. Reinstall the oil filler plug.
Changing oil
For best performance and longest life,
replace the complete fluid supply at least
once per year.
1. With saddle fully lowered, remove the
oil filler plug.
MAINTENANCE (continued)
2. Lay the jack on its side and drain the
fluid into a suitable container.
Note:
Dispose of hydraulic fluid in
accordance with local regulations.
3. Fill with oil until ~3/16” above the inner
cylinder as seen from the oil filler plug
hole. Reinstall the oil filler plug.
Lubrication
A periodic coating of light lubricating oil
to pivot points, axles and hinges will help
to prevent rust and assure that wheels,
casters and 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 the jack with saddle
fully lowered.
