Autoquip BASCULE BRIDGE - DOUBLE LEAF - Manual (Page 35)

GENERAL MAINTENANCE
VELOCITY FUSE REPLACEMENT
DANGER !
Do not attempt to remove the velocity fuse until the bridge is securely
supported with the blocking 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!
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 of a velocity fuse. Tape
fragments can cause malfunctioning of the fuse.
3. Check all fitting connections for hydraulic leaks and tighten as necessary.
HOSE ORIENTATION
To prevent damage to the cylinder hose(s) and possible failure of bridge, it is necessary
to establish a correct hose shape and pattern of movement as follows:
1. Lower the bridge and block securely. See “Blocking Instructions”.
2. Install one end of the new hose to the cylinder elbow fitting.
3. Raise the bridge carefully and check to see that the hose is free and clear of the
cylinder and other structured members. If not, twist the hose in the direction
necessary to clear it of any obstruction and then lock the swivel fitting securely.
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