Prop Shaft Hub Assembly

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   Looking for some help!  I'm not real sure where I went wrong on my prop shaft and hub assembly process.  I removed the hub and prop shaft to replace my strut bearing.  After following the process that I found on the forum, I can slide my hub on the shaft by hand.  The following is the process I used:
1.  Removed the hub using a 4 bolt hub puller.
2.  Cleaned the shaft and hub and checked the shaft for straightness.
3.  Heated the hub in an oven to 500 degrees and installed.
4.  Let cool overnight and when I checked it this morning, I could slide it on and off by hand.

The only thing that I can think of that I used differently was I did clean the inside of the hub and the shaft with soap and water and a scotchbrite pad.  Would this have removed enough material to make it this loose.  I didn't think I was getting too aggressive with it.

Thanks for any insight.
Jason 

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80tiquefan Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: January-05-2009 Location: Paragould, AR Status: Offline Points: 40	Post Options Post Reply Quote 80tiquefan Report Post Thanks(0) Quote Reply Topic: Prop Shaft Hub Assembly Posted: May-05-2020 at 4:10pm
	Looking for some help! I'm not real sure where I went wrong on my prop shaft and hub assembly process. I removed the hub and prop shaft to replace my strut bearing. After following the process that I found on the forum, I can slide my hub on the shaft by hand. The following is the process I used: 1. Removed the hub using a 4 bolt hub puller. 2. Cleaned the shaft and hub and checked the shaft for straightness. 3. Heated the hub in an oven to 500 degrees and installed. 4. Let cool overnight and when I checked it this morning, I could slide it on and off by hand. The only thing that I can think of that I used differently was I did clean the inside of the hub and the shaft with soap and water and a scotchbrite pad. Would this have removed enough material to make it this loose. I didn't think I was getting too aggressive with it. Thanks for any insight. Jason
	Jason Murray 1980SkiNautique 1993 Sport Nautique

8122pbrainard Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045	Post Options Post Reply Quote 8122pbrainard Report Post Thanks(0) Quote Reply Posted: May-05-2020 at 4:16pm
	Jason, I suspect that ether the shaft and coupling have fretted due to misalignment or at one time someone installed a coupling that wasn't matched to the shaft for an interference fit. Do you have anything to measure the ID and OD's? It should be .0000" to a -negative.0005" difference.
	54 Atom 77 Tique 64 X55 Dunphy Keep it original, Pete <

8122pbrainard Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045	Post Options Post Reply Quote 8122pbrainard Report Post Thanks(0) Quote Reply Posted: May-05-2020 at 4:18pm
	One more, what was the soap and water for? Were you removing a blackish residue on the bore of the coupling and on the shaft were it was on the coupling?
	54 Atom 77 Tique 64 X55 Dunphy Keep it original, Pete <

80tiquefan Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: January-05-2009 Location: Paragould, AR Status: Offline Points: 40	Post Options Post Reply Quote 80tiquefan Report Post Thanks(0) Quote Reply Posted: May-05-2020 at 4:28pm
	Yes, there was a brownish residue on the shaft and inside the coupling. Looked similar to a rust material which I thought was odd, Neither material should rust. I checked the alignment when I disconnected the hub before removal and it was true on all four sides of the coupling.
	Jason Murray 1980SkiNautique 1993 Sport Nautique

8122pbrainard Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045	Post Options Post Reply Quote 8122pbrainard Report Post Thanks(0) Quote Reply Posted: May-05-2020 at 4:55pm
	Jason, Can you get some measurements?
	54 Atom 77 Tique 64 X55 Dunphy Keep it original, Pete <

80tiquefan Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: January-05-2009 Location: Paragould, AR Status: Offline Points: 40	Post Options Post Reply Quote 80tiquefan Report Post Thanks(0) Quote Reply Posted: May-05-2020 at 5:19pm
	Measurements are not good at all. Coupling tail ID: 1.02" Coupling face ID: 1.0" Shaft OD: .99" Looks like a new shaft and coupling are needed.
	Jason Murray 1980SkiNautique 1993 Sport Nautique

8122pbrainard Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045	Post Options Post Reply Quote 8122pbrainard Report Post Thanks(0) Quote Reply Posted: May-05-2020 at 6:02pm
	Jason, The .difference in the bore of the coupling from the front to the back is sure an indicator that there was a misalignment problem. You said you got good measurements between the coupling faces when you unbolted the halves but tell us more. There is an option of saving the shaft and just using a spit coupling half. I'll dig up a link and post it. General Propeller is a good source.
	54 Atom 77 Tique 64 X55 Dunphy Keep it original, Pete <

8122pbrainard Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: September-14-2006 Location: Three Lakes Wi. Status: Offline Points: 41045	Post Options Post Reply Quote 8122pbrainard Report Post Thanks(0) Quote Reply Posted: May-05-2020 at 6:06pm
	Here's a link to GP's split couplings They are very easy to deal with and I feel the best to go to for any shafting components. Call them up and tell them you measured the shaft at .99" They will also need the OD of the coupling.and the OD of the coupling pilot on the face. GP is also an excellent source for a double taper shaft. (taper for the prop and taper for the coupling half)
	54 Atom 77 Tique 64 X55 Dunphy Keep it original, Pete <

80tiquefan Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: January-05-2009 Location: Paragould, AR Status: Offline Points: 40	Post Options Post Reply Quote 80tiquefan Report Post Thanks(0) Quote Reply Posted: May-05-2020 at 6:16pm
	Thanks Pete! I'll give them a call
	Jason Murray 1980SkiNautique 1993 Sport Nautique

Gary S Members Profile Send Private Message Find Members Posts Add to Buddy List Grand Poobah Joined: November-30-2006 Location: Illinois Status: Offline Points: 14096	Post Options Post Reply Quote Gary S Report Post Thanks(0) Quote Reply Posted: May-05-2020 at 6:19pm
	Should really measure the current shaft in an unworn spot as well just to check.
	69 Mustang HM SS 95 Nautique Super Sport

80tiquefan Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: January-05-2009 Location: Paragould, AR Status: Offline Points: 40	Post Options Post Reply Quote 80tiquefan Report Post Thanks(0) Quote Reply Posted: May-05-2020 at 7:15pm
	After tossing the dial caliper and using a micrometer, the measurements of the shaft are as follows: Coupling end of the shaft: .9759 Actual shaft: .9760
	Jason Murray 1980SkiNautique 1993 Sport Nautique

Prop Shaft Hub Assembly

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