Autoquip DOUBLE PANTOGRAPH LIFT - Manual (Page 48)

48
DANGER !
Do not attempt to remove the velocity fuse until the lift is securely
supported with the maintenance locking devices and all hydraulic
pressure has been removed from the lifting cylinders and hydraulic
hoses. Failure to follow these instructions could result in personal
injury or death!
VELOCITY FUSE REPLACEMENT
Never attempt to take a velocity fuse apart and repair it. These are precision devices that
are factory assembled under exacting conditions. Velocity fuses should always be
replaced.
1.
The arrow on the exterior surface of the velocity fuse shows the direction of the
restriction to the oil flow. The arrow should always point away from the cylinder.
2.
Do not use Teflon tape on the threaded connections. Tape fragments can cause
malfunctioning of the fuse. See Pipe Thread Sealant above.
3.
Check all fitting connections for hydraulic leaks and tighten as necessary.
HOSE ORIENTATION
To prevent damage to the cylinder hose and possible failure of lift, it is necessary to
establish a correct hose shape and pattern of movement as follows:
1.
Raise the lift to its full height and block securely. See “Lift Blocking Instructions”.
2.
Install one end of the new hose to the cylinder elbow fitting.
3.
Since the hose is fixed at both ends, it is possible to put a twist in the hose that will
allow it to describe the same pattern each time the lift is operated. This twist will
allow the hose to travel about half way between the cylinder on the right side and the
inner leg on the right side.
4.
Lower the lift carefully and check to see that the hose is free and clear of the cylinder
and the inner leg assembly. If not, twist the hose in the direction necessary to clear
it of any obstruction and then lock the swivel fitting securely.
GENERAL MAINTENANCE