| Author |
Message |
    
Fastjeff
Senior Member
Username: fastjeff
Post Number: 6175
Registered: 09-2003
| | Posted on Wednesday, July 01, 2009 - 08:39 pm: | 
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Been working on a mark 55 LU and I can't get that big prop shaft nut off. (It's bad corroded.) Tried heat, penetrating oil, incantations, etc. Uh-uh. It's like the threads are welded together.
Other than smashing the nut to pieces--to save the housing--has anyone got an idea what to do next? I'm stumped.
Jeff |
IBNFISHN
Advanced Member
Username: ibnfshn
Post Number: 633
Registered: 11-2005
| | Posted on Wednesday, July 01, 2009 - 09:00 pm: |
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Have you tried an impact wrench? |
ian summerfield
Member
Username: budgie14
Post Number: 45
Registered: 06-2009
| | Posted on Wednesday, July 01, 2009 - 09:10 pm: |
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Hi,im a great believer in disc cutters,.if u get a 4inch metal cutting disc,and put it on the side of the nut,c if it will cut the nut without touching the prop,.if it will then u can disc cut the nut without touching the threads.then split the nut after.handy hint 1.12pm |
Bob Caskey
Advanced Member
Username: bobbyc
Post Number: 414
Registered: 10-2007
| | Posted on Wednesday, July 01, 2009 - 09:19 pm: |
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Drill through the face of the nut at two points 180 degrees apart. Start with an eighth inch bit and increase to a larger bit. Eventually you will be able to split the nut with just a few taps on a small chisel. |
Fastjeff
Senior Member
Username: fastjeff
Post Number: 6177
Registered: 09-2003
| | Posted on Thursday, July 02, 2009 - 06:01 am: |
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IBN: Tried that with 90 lbs and only succeeded in wrecking my nomemade nut wrench a few times. It's corroded badly.
Ian: Not the nut that holds the prop on; it's the big aluminum nut inside the case.
Thanks Bob. I'll try that.
Now I'll need to find me another nut. Anyone have a source?
Jeff |
Fastjeff
Senior Member
Username: fastjeff
Post Number: 6185
Registered: 09-2003
| | Posted on Thursday, July 02, 2009 - 08:57 am: |
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Update: Managed to claw all the seals out and will replace them with the stubborn prop shaft still in place. (Used an oxy/acetylene torch to blow the water pump cartridge out! Exciting.)
Still looking for another prop shaft nut if you see one someplace.
Thanks,
Jeff |
