5
MACTOOLS.CO.UK
Trouble
Cause
Solution
Hydraulic trolley jack does
not lift
1 . Release valve is open.
2. Law/no hydraulic fluid in reservoir.
3. Air locked system.
4. Load is above capacity of hydraulic trolley
jack.
5. Delivery valve and/or bypass valve not
working correctly.
6. Packing wom out or defective.
1. Verify the release valve is closed by position of the handle. Release
valve may need cleaning.
2. Fill with approved hydraulic fluid & bleed system.
3. Bleed the system.
4. Use correct equipment.
5. Clean the remove dirt or foreign matter. Replace hydraulic fluid.
6. Replace packing.
Hydraulic trolley jack lifts only
partially
1. Too much or not enough hydraulic fluid.
1. Check hydraulic fluid level.
Hydraulic trolley jack advances
slowly
1. Pump not working correctly.
2. Leaking seals.
1. Rework pump.
2. Replace seals.
Hydraulic trolley jack lifts load,
but doesn't hold
1. Cylinder packing is leaking.
2. Valve not working correctly (suction, delivery,
release, or bypass.
3. Air-locked system.
1. Replace packing.
2. Inspect valves. Replace if necessary.
3. Bleed system.
Hydraulic trolley jack leaks
hydraulic fluid
1. Wom or damaged seals.
1. Replace seals.
Hydraulic trolley jack will not
retract
1. Release valve is closed.
1. Open the discharge valve by turning the sleeve counter clockwise.
Hydraulic trolley jack retracts
slowly
1. Cylinder damaged internally.
2. Return spring(s) is damaged.
3. Link section is binding.
1. Send hydraulic trolley jack to authorized service center.
2. Replace return spring(s).
3. Lubricate link sections.
GUARANTEE: 2 years. See the general conditions in the MAC TOOLS catalogue or the MAC price list.
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