Autoquip SERIES 35 SCISSORS LIFT - Manual (Page 32)

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6.3.3 Hydraulic Velocity Fuse (HVF) Replacement
Prevent serious injury or death.
Never go under lift platform until load is removed and scissors
mechanism is securely blocked in raised position with maintenance
devices and hydraulic pressure is relieved.
The HVF is attached to elbow fitting in rod port of cylinder. Do not use a
swivel fitting between HVF and cylinder. If HVF is installed improperly, it
will not lock up in the event of a hydraulic line failure.
Velocity fuse is not repairable. Replace velocity fuse if defective.
1. Arrow on hydraulic velocity fuse indicates direction
of oil flow restriction. Hydraulic velocity fuse must
be installed with arrow pointing away from cylinder.
Do not use Teflon tape on hydraulic
threaded connections.
Tape
fragments may damage hydraulic
system.
2. Apply Loctite PST #567 pipe thread sealant or equivalent to threads and install fuse to cylinder with
arrow pointing away from cylinder. Tighten fuse.
Autoquip recommends replacing any NPT fittings that have been disassembled due to their inherent
design for sealing.
3. Fill reservoir to full mark if necessary with proper oil.
4. Check all fitting connections for hydraulic leaks and tighten as necessary.
5. Bleed air from system. See “Bleeding Air From System” in this section.
6.3.4 Hose Orientation
To prevent damage to cylinder hoses, it is necessary to establish a correct hose shape and pattern of
movement as follows:
1. Raise lift to its full height and block securely. See “Maintenance Devices”.
2. Install one end of new hose to cylinder fitting.
3. Since hose is fixed at both ends, it is possible to put a twist in hose that will allow it to follow the same
pattern each time lift is operated. This twist will allow hose to travel about half way between cylinder
on right side and inner leg on right side.
4. Lower lift carefully and verify hose is free and clear of cylinder and inner leg assembly. If not, twist
hose in direction necessary to clear any obstruction and tighten swivel fitting.
^ WARNING
NOTICE