5
USER MANUAL
JEFJKGAR03
3 TONNE TROLLEY JACK
www.jeffersontools.com
5. Maintenance
6. Troubleshooting
IMPORTANT: ONLY FULLY QUALIFIED PERSONNEL SHOULD ATTEMPT MAINTENANCE OR REPAIR
WARNING: DO NOT USE BRAKE FLUID, OR ANY FLUID OTHER THAN HYDRAULIC JACK FLUID, AS TO DO SO MAY
CAUSE SERIOUS DAMAGE TO THE JACK AND WILL INVALIDATE THE WARRANTY!
• When the jack is not in use, the ram and piston must be in their lowest positions to minimise corrosion.
Remove the handle to inactivate jack.
• Keep the jack clean and lubricate all moving parts with acid free oil on a regular basis.
• To check the hydraulic oil level, fully lower the jack and remove the oil filler plug (Fig. 2). The correct oil level should be
approximately 5mm below the filler opening. If oil level is low, fill as required.
• After a year of extensive use, the oil should be replaced in order to extend the life of the jack. Drain the oil through the
filler plug opening. Make sure that no dirt is allowed to enter the jack or the fresh oil.
• To replace the oil fill as required. Pump unloaded jack 5 or 6 times to expel air and then refit the plug.
Note: Ensure waste oil is disposed of in accordance with local authority regulations.
TO PURGE AIR FROM THE SYSTEM
• Turn the handle counter clockwise one full turn to open.
• Pump the handle eight full strokes.
• Turn handle clockwise to close the valve.
• Pump the handle until the ram reaches maximum height and continue to pump several times to remove air trapped in the ram.
• Turn the handle counter clockwise one full turn and lower the ram to the lowest position. Use force on the saddle if necessary.
• Turn the handle clockwise to the closed position and check for proper pump action. It may be necessary to perform the above
procedure more than once to ensure all the trapped air is evacuated.
Symptom
Possible Cause
Corrective Action
Jack will not lift the
load
1. Overloaded
2. Oil level low
3. Release valve not correctly closed
4. Air in system
5. Packing worn or defective
1. Be sure to use jack with adequate capacity
2. Top up oil level
3. Check and close release valve
4. Open release valve and air vent (if fitted) and pump the handle
a few times. Close valve and re-try
5. Return jack to local service agent
Jack does not lift
high enough or feels
“spongy”
1. Low oil level
2. Worn seals
3. Air in system
4. Release valve not closed
1. Top up oil level
2. Return jack to local service agent
3. Open release valve and air vent (if fitted) and pump the handle
a few times. Close valve and re-try
4. Check and close release valve
Jack will not hold the
load
1. Release valve partially open
2. Dirt on valve seals
3. Air in system
4. Faulty seals
1. Check and close release valve
2. Lower jack, close release valve. Pull up lifting arm to full
height by hand. Open the release valve to lower arm
3. Open release valve and air vent (if fitted) and pump the handle
a few times. Close valve and re-try
4. Return jack to local service agent
Jack will not descend
to minimum height,
or will not remain in
lowered position
1. Ram damaged
2. Air in system
3. Release valve partially open
1. Contact local service agent
2. Open release valve and air vent (if fitted) and pump the handle
a few times. Close valve and re-try
3. Check and fully open release valve
Jack will not function
properly after trying
solutions above
1. Internal malfunction or structural
damage
1. Stop usage and contact an authorized repair centre
