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Drive Shaft U Joint BMW Airhead / Oshmo
Drive Shaft U Joint BMW Airhead
 
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Part # DSUJointOshmo

Carden Driveshaft U-Joint.

When replacing the joint on a stock driveshaft simply tack weld the ends in two places (the circlips provided will not fit) - see photo of welded ends.
If you care not to do this repair yourself you can contact OSHMO directly for this service.

Vehicle Manufacturer: BMW

Application: BMW Airhead
Make/Model: BMW All Airhead Models
Model Years: 1969 - 1996

Brand:
EME Price $59.00

Part #: DSUJOINTOSHMO
Qty:

Description
 

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Features

INSTRUCTIONS

These instruction are to help the first timer do it right. We find most hobbyists do not have dedicated tools for u joint service so I’ve explained how to do this with a bench vise and other simple tools. If you’re not sure you can do the following, take your drive shaft to a qualified shop or send it to us here in Los Angles. Ca.

Glossary:
U-Joint = entire assembly
Cup = 4 cups per assembly –has needle rollers inside.
Cross = the cross is the center forging that of the u joint assembly.
Stakes = these are the deep groves that are cut into the yoke bore to hold the original cups in place.
Yoke = the two yokes house the u joint assembly.
Puck = these are 4 small discs that are supplied with the Oshmo U-Joint.

Grind down the stakes with a Dremel or similar too so the yoke bore are smooth.
Press out the old U Joint by forcing the cross into the inside of the cup until it’s sticking out of the bore. Some heat will help. do not over heat the yoke if using an torch. If seized, be very careful not to create too much force as the yokes can bend. If this is the case use heat at the u joint bores.

INSPECT BORES _ PRESS IN U JOINTS –
Inspect the bores and be sure they are free of any slag or staking divots that protrudes into the bore. If bores are not smooth, U Joint cups will be damaged.

Press in the new U Joints – Be sure they are centered and the internal pins do not contact the ends of the pins as you press them home.

Insert two pucks, one on each opposing end. Use c-clamp or similar tool and press the pucks so they are flush to the yoke-bores.

CENTER THE U JOINS AND WELD IN THE PUCKS –
For this operation you will need pressing tool, either a u joint clamping tool or a bench-vise. A c-clamp could do the job as well if you have an extra set of hands. Keep in mind that the pucks are machined to a specific thickness to assist with centering the U Joint.

Keep the cups free of dirt and debris.

Press one u joint cup very slightly into a pocket. Be sure it is not cocked. Insert the cross into the empty bore opposite the u joint cup and then position the pin of the cross into the cup being careful not to disturb roller pins inside the cups.

Keep the u joint cross in place while pressing the opposite cup into the yoke. Insert opposite cup into the bore and press in leaving room so the cross can float from one cup to the other.

Once you’re sure the cups are aligned and the cross floats form one cup to the other, press the cups in so they are flush with the face of the bores.

Now do the other yoke.

Now install and press pucks in until flush with the bores.

Check for binding as you go. Do not push pucks so far that they bottom out. Keep in mind that the yokes are not exactly the same from one bike to another. Over the years the yokes vary slightly.

Do not use the pucks as and end-all alignment tool. When you done you should have about .004 – .006 float.

NOTE: Do not use a TIG Welder or Torch as they will generate heat too slowly and the joints will overhead and possibly be damaged. – Use an arc or mig-welder. Quench each puck before moving to the next.

If you have any questions call the OSHMO technical department at 818-778-6106

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