Craftsman T825011L ユーザーズマニュアル

• An upward stroke of the jack Handle draws oil 

from the reservoir tank into the plunger cavity. 

Hydraulic pressure holds the valve closed, 

which keeps the oil in the plunger cavity.

• A downward stroke of the jack Handle 

releases oil into the lift cylinder, which forces 

the power unit ram out. This raises the saddle.

• When the ram reaches maximum extension, 

oil bypasses the lift cylinder through an 

overload valve back into the oil reservoir, 

protecting the jack from damage. This bypass 

system also goes into effect when the jack is 

overloaded (load exceeds 4,000 lbs) to protect 

the jack from damage and the user from 

possible serious injury.

• Opening the release valve allows oil to flow 

back into the reservoir. This releases hydraulic 

pressure on the ram, which results in lowering 

the saddle.

• Position jack on the level ground and lower the 

saddle.

• Remove the oil plug.

• Fill the oil case until oil level is just beneath 

the lower rim of oil fill hole. Replace oil plug.

• Perform the Air Purge Procedure detailed on 

page 1 of this Operator’s Manual.

• Fully open release valve by turning handle 

counterclockwise as far as it will go.

• Turn the jack over so that old oil will drain from 

the oil fill hole.

• Refill through oil fill hole. Keep dirt and other 

material clear when pouring. Fill to just 

beneath lower rim of hole. Replace oil plug.

• Perform Air Purge Procedure detailed on page 

1 of this Operatior’s Manual.

• Add lubricating oil (WD-40) to all moving parts 

when needed.

• For light duty use, lubricate every six months.

• For heavy and constant use, lubrication is 

recommended every month.

• Check ram and pump plunger on the Power 

Unit Assembly every two months (or sooner, 

based on usage) for any signs of rust or 

corrosion. Lift the jack as high as it goes and 

look under and behind the lifting arm. If signs 

of rust are visible clean as needed and wipe 

down with an oily cloth or WD-40.

• When storing the jack, always have the saddle 

and pump plunger in the down postion.

During shipment or after oil refill, air may get 

into the hydraulic system causing reduced 

lifting performance. Perform Air Purge 

Procedure as detailed on page 1 of this 

Operator's Manual.