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Topic: Bulkhead Repair (Read 544 times) previous topic - next topic

Bulkhead Repair

Has anyone ever tried a bulkhead repair using expandable bolts such as these.  Drill out the current bolts one at a time and replace with these.

I have tried everything I know to attached their website with out any luck.  Please lookup Tanner Fasteners & Industrial Supplies.  I really need input before I screw something up.  I was thinking the 5/16 size would be best.

Re: Bulkhead Repair

Reply #1 –
Which style?  The web page shows a couple that could be considered expandable.  Search for "expandable bolt" had no results.

Re: Bulkhead Repair

Reply #2 –
Item Code: BQ1S08

Re: Bulkhead Repair

Reply #3 –
These look like they would work. The 5/16" size has a 2" long bolt.  The end floor frame is 1-1/2"square with 1/8" walls as I remember.  Plus the thickness of the angle, and the 1/4" thickness of the shoulder... They might be too long.  You might need a clearance hole on the opposite side of the floor frame to use this size.

All this does is reattach the floor frame to the angle section of the bulkhead. Are there signs of rust on the floor frame? Rust jacking at the end of the floor, bulging in the bottom of the floor where the frames are or in between? 

Re: Bulkhead Repair

Reply #4 –
NO, I would not use them. 

First issue is how to remove the remainder (all but the last 4-5 threads of the old Rolok).  Hard to drill as they are grade 8.  Much easier to just unscrew then from the "front".

Go back to my original write-up-- easy to drill the FG to access the front of the rear bulkhead. Then seal the hole with a premade water-proof plug.  If doing a lot of them, just use an aluminum or FG strip bedded in polysulfide to seal the area.

Then from that hole, very easy to double nut the  "front" part of the Rolok and remove it to allow easy overdrilling and through bolting. 

Re: Bulkhead Repair

Reply #5 –
Many years ago in the 2way radio business they had a 2 1/2 or 3'" rubber plug that you could seal water tight.  I'm confused your comment to remove the stub from the front.  Are saying to just screw it on thru the box iron?

Re: Bulkhead Repair

Reply #6 –
Quote from: Nick Cagle –
  Are saying to just screw it on thru the box iron?

In a word, YES.

With access from the front you can easily put two nuts to the threaded part extending forward of the box beam and screw it out (forward).  It is only secured by the two thin walls of the box beam.  Doesn't hurt to soak the front that you can access with penetrating oil.  Have done several dozen this way and never a problem.