Northern Radiator

Northern Radiator will be closed on 11/28 and 11/29 in observance of Thanksgiving.

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Hoist Bushings

The piston cups do not seal perfectly, so there will always be some leakage.

1.) Determine the size bushing needed.  Bushing size matches the ID of the cylinder. Cylinder OD can be measured and used in chart below to  determine bushing size.

For Hoists RW0150, RW0160, and RW0560.

ID Cylinder OD Cylinder Bushing Size Bushing Location Bushing P/N
2.5" 3" 2.5 Top RW280-1-25
2.5" 3" 2.5 Middle RW0280-8-4
2.5" 3" 2.5 Bottom/Lower RW0280-8-2

For Hoists RW0260, RW0360, and RW0460.

ID Cylinder OD Cylinder Bushing Size Bushing Location Bushing P/N
3" 3.5" 3" Top RW281-1-25
3" 3.5" 3" Middle RW0281-8-4
3" 3.5"3" Bottom/Lower RW0281-8-2
2.) Electric hoists (RW0360 and RW0460) only have 2 bushings.


RW0281-1-25
Top Cylinder Bushing = 4 countersinks or dimples, no through holes or threads


RW0281-8-2
Lower Shaft Bushing = 2 tapped through holes, 90 degrees apart

3.) All others have 3 bushings. 


RW0280-1-25
Top Cylinder Bushing = 4 countersinks or dimples, no through holes or threads


RW0281-1-25
Top Cylinder Bushing = 4 countersinks or dimples, no through holes or threads


RW0280-8-4
Middle Stop Shaft Bushing = 3 tapped through holes, 120 degrees apart


RW0281-8-4
Middle Stop Shaft Bushing = 3 tapped through holes, 120 degrees apart


RW0280-8-2
Lower Shaft Bushing = 2 tapped through holes, 90 degrees apart

    •    There were about 20 hoists that had lower shaft bushings with 3 tapped through holes, 120 degrees apart.  Hoists that used these lower shaft bushings had 3 dimples 120 degrees apart. Another hole can be drilled in a lower shaft bushing to accommodate this shaft. Alternately, a middle stop shaft can be used, but it will be sloppy.


RW0281-8-2
Lower Shaft Bushing = 2 tapped through holes, 90 degrees apart

    •    There were about 20 hoists that had lower shaft bushings with 3 tapped through holes, 120 degrees apart.  Hoists that used these lower shaft bushings had 3 dimples 120 degrees apart. Another hole can be drilled in a lower shaft bushing to accommodate this shaft. Alternately, a middle stop shaft can be used, but it will be sloppy.

4.) About 30 RW0360 hoists built prior to 1995 had a solid shaft which was a smaller diameter. These use a flanged top bushing with 2.25” ID and 2.5” OD with p/n RW0282-1-25 and bottom bushing RW0280-8-2.


RW0282-1-25


RW0280-8-2

5.) Barbee 360 hoist bushings are different from Northern RW0360 bushings. Contact Barbee for replacements.

6.) Barbee 285 hoist (similar to our RW0560) bushings are a press-on style bushing. Contact Barbee for replacements.

Instructions for Piston Removal

1.) Raise cylinder of hoist all the way up and then down just a small amount.

2.) Remove all pressure on the cylinder and remove the top bushing.

3.) As you remove the shaft, oil will go everywhere.

4.) Put old top bushing back in. Cover the cylinder with a pail or something to deflect oil from going everywhere.

5.) Put a little air pressure on the cylinder to move the piston up.

  • If you forget to put old top bushing back in, the piston and oil will shoot out the top.

6.) Relieve the pressure and the piston cup will stay up. A 3/8”-16 bolt can be threaded into the piston cup for removal.

  • If replacing a piston cup that is older than ~ 2012, it should be replaced with a whole assembly. The old design snaps when barely tight.  The new design is much more robust. The new ones have a weld at the stem to the base.