CLAS OH 9001 Mode D'emploi page 7

OH 9001
WHEEL DOLLY HGV
OPERATION
REMOVING WHEEL(S)
1. Raise the vahicle so the weel(s) that needs to be removed is clear the ground. Keep the axle(s) horizontal to make
is easier to slide the weel(s) on and off.
2. Place jack stands under the vehicle, and block the vehicle.
3. Lower the dolly's lifting arms by turning the valve on the hydraulic jack counterclockwise. Position tthe dolly under
the wheel(s).
4. Raise the lifting arms by closing the valve (turn clockwise) and pumpping the jack handle until the arms
aresupporting the weight of the wheel(s).
5. Loop the chain around the wheel(s) and snug the chain before fastening it to the connecting points.
6. Carefully slide the wheel(s) onto the axle by pulling the dolly toward the vehicle. Avoid damaging the bearing
and seals.
REPLACING WHEEL(S)
1. Load the wheel(s) onto the dolly, and securely loop the chain around the wheel(s).
2. Align the dolly with the axle.
3. Carefully slide the wheel(s) onto the axle by pushing the dolly toward the vehicle.
Note: To align the wheel(s) with the mounting studs, rotate one of the lifting arm rollers, wich will rotate the wheel.
4. Remove the chain.
MAINTENANCE
IMPORTANT : the greastest single cause of failure in hydraulic unit is dirt. Keep the service jack clean and well
lubricated to prevent foreign matter from entering the system. If the jack has been exposed to rain, snow, sand or
grit, it must be cleaned before it is used.
• Completely retract the jack's cylinder before adding or replacing oil. If it's necessary to add oil, remove the
ler plug and ll the reservoir with Chevron AW hydraulic oil MV or equivalent. Do not use brake uid, alcohol,
glycerine, detergent, motor oil or dirty oil because these uids can damage the internal seals of the jack and its
cylinder. Do not mix types of oil.
• Grease the wheels and pivot points on a regular maintenance schedule.
• If the lifting action of the hydraulic system feels "spongy" bleed air out of the system by completely opening the
release valve, while holding down the end of the jack cylinder. Rapidly operate the pump handle several times.