Two post hydraulic lift HAPP 95
© 2013 HAPP Australia Pty Ltd
Version 9
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cylinder rod until the cylinder rod bottoms out on the cylinder housing.
Also the oil volumes may be aligned (fine tuned) by continuing to hold the down lever in at
lowest level for 30 seconds after bottoming, this only provides a minor synchronization if the
gears in the flow divider happen to allow some bleeding. Some customers lift slightly, lower and
repeat the equalization to get optimum alignment.
8.5 Correcting from misalignment of lifting while raised
It is possible for the carriages to get out of alignment. For example, if you lower the hoist with only one
latch released the latch will engage on one side and not on the other. This will force oil back through the
flow divider causing the oil volumes to be different which will not be able to be resolved without
definite action from the operator.
If the vehicle can be safely lowered the carriages can be lowered to their lowest position and the oil
volumes equalized using the approach presented in section 8.4 equalizing oil volumes.
If the vehicle is higher and there is concern that vehicle will become unstable, follow these steps to
equalize the hoist.
1.
Slowly raise the hoist just enough to reactivate the safety latches (typically only around 50mm).
2.
Release the safety latch on the side that is highest.
3.
Begin to slowly lower the hoist. The side that is lowest should engage its latch and hold and the
other side will continue lowering.
4.
Keep lowering until the hoist is level (you may need to go about 5-‐10mm more to achieve
balance)
5.
Raise the hoist slightly to remove load from the latches, the hoist should now be level.
6.
Disengage both safety latches and lower the vehicle.
7.
Fine tune the lifting of the hoist as presented in section 8.4.
