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8. Maintenance
IMPORTANT: When adding or replacing oil, always use a good grade hydraulic jack oil such as Shell Tellus 22.
Avoid mixing different grades/types of oil. DO NOT use brake fluid, alcohol, glycerine, detergent motor oil or dirty oil.
Improper fluid can cause serious internal damage to long ram. When adding oil be VERY CAREFUL not to permit
dirt or foreign matter to get into the system. Check ram and plunger every 3 months for any signs of rust or corrosion.
Clean as needed and wipe with an oily cloth. When not using the long ram, always leave the jib in the fully lowered
position.
9. Trouble shooting
Trouble
Will not hold load
Will not lift load. Will not lift to its full
height. Pump feels unsteady under load.
Pump will not lower completely.
Pump will not lilt lo its full height.
Pump feels unsteady under load.
Pump feels unsteady under load.
Will not lower completely.
10. Recycling
Folding workshop crane must be disposed of and recycled in accordance with the applicable legislation of the country
of use.
Probable Cause
Dirt on valve seats
Air block.
The reservoir could be overfil-
led. Low hydraulic oil level.
The pump cup seal could be
worn out.
Air block. Unit requires lubri-
cation.
Remedy
1. Lower lifting boom. Close the release
valve and remove oil filler plug.
2. Place one foot on the leg and pull up
the lifting boom to its full height by hand.
3. Open the release valve to lower the
lifting boom.
4.Worn seals.
1. Open the release valve and remove
oil filler plug.
2. Pump handle a couple of full strokes
and close the release valve.
Check the oil level. Remove the filler
plug. Top up oil to correct level.
Replace cup seal with a new one.
Release air from hydraulic pump by
removing filler plug. Oil external moving
parts.
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