Steam Traction World
Would you like to react to this message? Create an account in a few clicks or log in to continue.

Bad sound coming from rear end

Go down

Bad sound coming from rear end Empty Bad sound coming from rear end

Post  jjtjr on Mon 14 Sep 2020, 12:47 pm

The weather here in New Jersey is getting cooler I decided to fire up the car   and go for a drive, but didn't get too far. I felt and heard a clunking sound and vibration, not sure where it was coming from, did some troubleshooting, jacked up one side of the rear end and rotated the tire. it would bind and lock up with only a little turn then raise both rear tires and it rotated ok looks like something is binding in the diff. I will be removing it from the car to see what went wrong. Looked thru the assy book to see what  could be the problem, it looks pretty straight forward. Maybe a bad gear. I will post the findings. Has anyone had this problem ?
jjtjr
jjtjr

Number of posts : 168
Age : 72
Location : New Jersey,usa
Registration date : 2009-07-28

Back to top Go down

Bad sound coming from rear end Empty Re: Bad sound coming from rear end

Post  Goliewogs on Mon 14 Sep 2020, 1:31 pm

Hi! Could be a broken tooth on one of the pinions.....?!!
Greg

Goliewogs

Number of posts : 81
Age : 69
Location : FRANCE - Normandie
Registration date : 2016-03-28

Back to top Go down

Bad sound coming from rear end Empty bad gears in rear end

Post  jjtjr on Wed 16 Sep 2020, 5:47 pm

Dean need your help on getting these parts. Just took the rear end out of the car and found the problem. all the gears are chipped or broken teeth. have to order parts from Dean
parts needed.
LK0307   2
LK0308   4
LK0304   1
LK0311  4
Don't know why  the teeth broke the tooth got into the rest of the gears and broke them. The spur gears on the axle are also broken The case is OK

Bad sound coming from rear end Img_0114
Bad sound coming from rear end Img_0112
Bad sound coming from rear end Img_0113
jjtjr
jjtjr

Number of posts : 168
Age : 72
Location : New Jersey,usa
Registration date : 2009-07-28

Back to top Go down

Bad sound coming from rear end Empty Re: Bad sound coming from rear end

Post  Grier on Wed 16 Sep 2020, 8:32 pm

Popping wheelies and laying down the rubber!! https://2img.net/i/fa/i/smiles/lol.gif

Looking at your parts, I would guess a chipped tooth first, then another bigger chip (long one) that jammed itself and broke the other gear in two. Wouldn't take much to start a chain reaction. At least you can say you have driven your steam car long enough to have to rebuild its differential. For which is an enviable place to be.
Grier

Grier

Number of posts : 36
Location : Topsail Beach, NC
Registration date : 2015-05-15

Back to top Go down

Bad sound coming from rear end Empty rebuild rear end

Post  jjtjr on Wed 16 Sep 2020, 11:21 pm

trying to get it done for the trip to florida for the winter.
jjtjr
jjtjr

Number of posts : 168
Age : 72
Location : New Jersey,usa
Registration date : 2009-07-28

Back to top Go down

Bad sound coming from rear end Empty Re: Bad sound coming from rear end

Post  Goliewogs on Thu 17 Sep 2020, 8:31 am

Hi Jim, I was right! But Grier's blow by blow diagnosis I think is absolutely correct. However, I do feel very sorry for you having to rebuild - always a pain, but at least you have been in the enviable position of actually driving your Lyka (for some years now)! I can't even imagine if that day will ever come for me!!
Kindest regards
Greg

Goliewogs

Number of posts : 81
Age : 69
Location : FRANCE - Normandie
Registration date : 2016-03-28

Back to top Go down

Bad sound coming from rear end Empty rear end rebuild

Post  jjtjr on Thu 17 Sep 2020, 12:27 pm

I've been in contact via email with Dean, This was a Modelworks kit which may present a problem with STW, Dean is checking on it now, There may be a difference between the two designs for series one from both companies , I hoping this is not the case.
jjtjr
jjtjr

Number of posts : 168
Age : 72
Location : New Jersey,usa
Registration date : 2009-07-28

Back to top Go down

Bad sound coming from rear end Empty gears

Post  jjtjr on Fri 18 Sep 2020, 10:45 am

Dean did respond at this time and said that this car was made by Modelworks and not from STW which could mean that the gears from STW may not work if they were not machined to the same specs. He is checking further to see if there is any difference. If there is any difference  will the new gears fit into the case. I'm still waiting for him to get back to me. If things go well all will work, but if not I will have to made a new set of gears and will need the data for cutting them which is another problem.
jjtjr
jjtjr

Number of posts : 168
Age : 72
Location : New Jersey,usa
Registration date : 2009-07-28

Back to top Go down

Bad sound coming from rear end Empty Re: Bad sound coming from rear end

Post  milford59 on Fri 18 Sep 2020, 5:17 pm

jjtjr wrote:Dean did respond at this time and said that this car was made by Modelworks and not from STW which could mean that the gears from STW may not work if they were not machined to the same specs. He is checking further to see if there is any difference. If there is any difference  will the new gears fit into the case. I'm still waiting for him to get back to me. If things go well all will work, but if not I will have to made a new set of gears and will need the data for cutting them which is another problem.

Is it possible that a skilled machinist could measure the gears that you have, and make new ones to the same dimensions ? Just a thought..

milford59

Number of posts : 103
Location : Milford on Sea
Registration date : 2019-05-19

Back to top Go down

Bad sound coming from rear end Empty gears

Post  jjtjr on Sat 19 Sep 2020, 1:07 pm

At this point I'm waiting to hear back from Dean, it should be monday or tuesday.  If he has them my problems are solved. If not I could cut them myself. I have cut gears before. It's just a a long process not having a CNC  bridgeport milling machine and Lathe,  mine is a old bridgeport  with a DRO and Lathe with DRO. Then the gears have to be heat treated to a HRC  between 50 to 60. It would be great if he had the calculations on the gears. This would make cutting them faster.  Four pinion and two axles gears have to be cut. The plan would be to cut teeth in  a long piece of stock then part each gear, this would make things a little faster. I have  been checking around on machine shops that can cut gears not all do.
My question is why did the gear fail in the first place,  yes a tooth broke off then cause the other gears to fail. Was it a design problem or just material failure. This would help when making a new part, because i don't want to reproduce a part which will fail again. where not talking about a high HP engine in our cars, like our daily drives.

I've been collecting data on modern spur gears. This is what data on gears I have so far. Having the specs on the old gears could may be explain why the old gears failed.

type of steel = s45c
pressure angle  is 20 degs
number of teeth = old gears
specs on gears = old gears
there is a lot more calculations needed for cutting gears which I could measure from the old ones.
The problem with cutting gears is you can't have  39 perfect teeth  and 1 not so perfect.
jjtjr
jjtjr

Number of posts : 168
Age : 72
Location : New Jersey,usa
Registration date : 2009-07-28

Back to top Go down

Bad sound coming from rear end Empty Re: Bad sound coming from rear end

Post  Goliewogs on Sun 20 Sep 2020, 9:57 am

Hi Jim, Looking at your pictures of the broken spurs, it seems to me that the quality of the original metal was very poor? It seems to be very crystalline? Not cast surely? Or worse, cast from some sort of 'muck' metal??!!
Regards
Greg

Goliewogs

Number of posts : 81
Age : 69
Location : FRANCE - Normandie
Registration date : 2016-03-28

Back to top Go down

Bad sound coming from rear end Empty bad gears

Post  jjtjr on Sun 20 Sep 2020, 1:05 pm

Hi Greg, That's what I was thinking also. Having the old gears I could do a HRC test and see what number it was.Taking a closer inspection of the gears you can see wear where it make contact with the axle gears. If you look at the photos , in the very middle of each pinion gear you can see what I'm talking about.This should not be present do to the little use it gets, this presents other questions with the material and harding.
jjtjr
jjtjr

Number of posts : 168
Age : 72
Location : New Jersey,usa
Registration date : 2009-07-28

Back to top Go down

Bad sound coming from rear end Empty gears

Post  jjtjr Today at 1:03 am

The good news is that Dean has the gears that will fit and will be sending to me. as soon as we work out the shipping to the USA.
jjtjr
jjtjr

Number of posts : 168
Age : 72
Location : New Jersey,usa
Registration date : 2009-07-28

Back to top Go down

Bad sound coming from rear end Empty Re: Bad sound coming from rear end

Post  Sponsored content


Sponsored content


Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum