13
TROUBLESHOOTING
Problem Cause Solution
Will not hold load.
Dirt on valve seats.
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.
Will not lift load.
Will not lift to its full height.
Pump feels unsteady under
load.
Pump will not lower com-
pletely.
Air block.
1. Open the release valve and
remove oil filler plug.
2. Pump handle a couple of full
strokes and close the release
valve.
Pump will not lift to its full
height.
Pump feels unsteady under
load.
The reservoir could be over-
filled.
Low hydraulic oil level.
Check the oil level. Remove the
filler plug.
Top up oil to correct level.
Pump feels unsteady under
load.
The pump cup seal could
be worn out.
Replace cup seal with a new
one.
Will not lower completely.
Air block.
Unit requires lubrication.
Release air from hydraulic
pump by removing filler plug.
Oil external moving parts.
