Fly Wheel Ring Gear Help

[jedwards]

Gentlemen,
The ring gear on my flywheel is pretty chewed up at TDC and TDC+180. This wear is quite normal, but as the ring gear is not replaceable on a Series 1, and I have never seen a new one offered or sale, I am hoping I can get some advice on how to manage this as part of my restoration.

Any recommendations would be greatly appreciated.

regards and thanks
Jeff

[theelms66]

4 cyl stops in 2 positions ,6 cylinder stops in 3 positions. I assume yours is a four cylinder and the 2 wear areas is where the starter motor engages. Can you rotate the flywheel on the crank by one bolt hole so the engine stops at a fresh area of the ring gear?

[B.S.F.]

Gentlemen,
The ring gear on my flywheel is pretty chewed up at TDC and TDC+180. This wear is quite normal, but as the ring gear is not replaceable on a Series 1, and I have never seen a new one offered or sale, I am hoping I can get some advice on how to manage this as part of my restoration.

Any recommendations would be greatly appreciated.

regards and thanks
Jeff
1.6 L, 2 L Siamese or 2 L spread bore engine ?
.W.

[ian4002000]

Why wouldn't the ring gear be replaceable ?

Ring gears where sold by places like Repco a long time ago and there should be someone still selling them.

You might need an older mechanic to help fit a ring gear if you find one.

Ps make sure your starter has been fixed before fitting new ring gear.

Ian
Bittern

[gromit]

Parts manual shows it as replaceable but I did find reference to it not being replaceable on some flywheels.

If Ring gear is separate.
Replacement (if you can find one) is straightforward but you need to get the old one off without damaging the flywheel. Typically grind down between two teeth and split with a chisel. Heat up the new one and drop it into place but get it right first time because once it's shrunk in place.......
If you can press the old ring gear off the old trick was to turn it round and press it back on, you might have to grind a 'lead in' on each of the teeth though.

If not separate can it be machined off and a replacement fitted ?
Machining tolerance has to be worked out to get a good shrink fit. I've done this on my Isuzu motor which had to have a new flywheel made.
Isuzu C240 powered Series 3 (https://www.aulro.com/afvb/other-powered-series-land-rovers/151959-isuzu-c240-powered-series-3-a-post1702775.html#post1702775)

Ring gear for flywheel 1948-54 - Series Forever
(https://www.seriesforever.com/en/series-parts-upto-1984/5172-ring-gear-for-flywheel-1948-54.html)https://www.johnwearingp4parts.co.uk/proddetail.php?prod=246330

Ring Gear R Us - Our Products (http://www.ringgear.co.nz/Our_Products.shtml)

Next alternative....find another flywheel.


Colin

[Blknight.aus]

from memory really early engines had the flywheel and ring gear as one piece.

if its a 2 piece it can be replaced, the trick is finding (or adapting) the right one.

As gromit has mentioned, the one piece flywheel can be machined to take a ring gear.

[JDNSW]

As above. The trick will be finding the ring gear and someone to machine the flywheel. Alternative - seek a "new" flywheel, most likely second hand. I am not sure how interchangeable the flywheels are, but probably someone here can help. It is possible the flywheels off some Rover cars may be usable.

[whitehillbilly64]

Wonder how close a Fergy one is. Plenty of ring gears.
Tractor Massey Ferguson Flywheel Ring Gear 12v TEA20 TED20 TE20 35, 135 Petrol | eBay (https://www.ebay.com.au/itm/Tractor-Massey-Ferguson-Flywheel-Ring-Gear-12v-TEA20-TED20-TE20-35-135-Petrol/322449593891?hash=item4b137e5623:g:CmsAAOSw241YdCT C&frcectupt=t)
9 inch clutch.


remove and fitting.
Vintage Tractor Engineer - Replacing / Fitting Tractor Starting Ring Gear (http://vintagetractorengineer.com/2009/01/replacing-fitting-tractor-starting-ring-gear/)

whitehillbilly

just for interest.
Starter, Pinion Gear Diameters & Ring Gear Specs - CJ-2A (https://www.kaiserwillys.com/tech-guide/starter-pinion-gear-diameters-ring-gear-specs-cj-2a)

looked for some sizing.
825452M1 New Flywheel Ring Gear Fits MF Tractor TE20 135 35X VPC4201 | eBay (https://www.ebay.com.au/itm/825452M1-New-Flywheel-Ring-Gear-Fits-MF-Tractor-TE20-135-35X-VPC4201/233477346314?_trkparms=aid%3D555021%26algo%3DPL.SI MRVI%26ao%3D)

No Measurements.
Ring gear for flywheel 1948-54 - Series Forever (https://www.seriesforever.com/en/series-parts-upto-1984/5172-ring-gear-for-flywheel-1948-54.html)

[whitehillbilly64]

Rover one.

ROVER FLYWHEEL STARTER RING GEAR 97 TEETH FOR ROVER 1935 ~ 1936 | eBay (https://www.ebay.co.uk/itm/ROVER-FLYWHEEL-STARTER-RING-GEAR-97-TEETH-FOR-ROVER-1935-1936-/324085094749?nma=true&si=dVt75CQEL0AhHEo0Vx8n3ZTv%252BVQ%253D&orig_cv)

whitehillbilly

[LR1953]

Gentlemen,
The ring gear on my flywheel is pretty chewed up at TDC and TDC+180. This wear is quite normal, but as the ring gear is not replaceable on a Series 1, and I have never seen a new one offered or sale, I am hoping I can get some advice on how to manage this as part of my restoration.

Any recommendations would be greatly appreciated.

regards and thanks
Jeff

Jeff,
From my own experience (I have a '53 siamese bore) and your description I would hazard a guess your flywheel is off the original engine fitted to your car and subsequently transferred to the spreadbore block/crank. Some years back I bought a replacement ring gear from John Craddock so you might try them. I've also found Dingocroft helpful. Both in the UK.
I have an original workshop manual and parts catalogue for this model. If you PM me with contact details I'll send you scans of the relevant pages.
Cheers, Rob S

[1950landy]

Jeff,
From my own experience (I have a '53 siamese bore) and your description I would hazard a guess your flywheel is off the original engine fitted to your car and subsequently transferred to the spreadbore block/crank. Some years back I bought a replacement ring gear from John Craddock so you might try them. I've also found Dingocroft helpful. Both in the UK.
I have an original workshop manual and parts catalogue for this model. If you PM me with contact details I'll send you scans of the relevant pages.
Cheers, Rob S
I had one & also a complete F/Wheel , have not seen them for a long time though . [bighmmm] Have to have a think were they were .[bighmmm]

[jedwards]

Gentlemen,
Thanks for the advice and help.
Firstly, the Series 1 flywheels are one piece and never had seperate ring gear. The flywheel cannot be rotated, as suggested, as it is fitted with permanent dowels.

However, there is an answer to this. I got in touch with Ian Cox of Cox and Turner in the UK yesterday. They offer a flywheel repair service, but postage of the heavy flywheel to the UK and back again would be prohibitively expensive. He suggested that he can supply a brand new ring gear for £78 and will include the engineering drawings required to machine off the old ring and set the flywheel up to take the new ring gear.

So I then visited Performance Modifications, in Perth, who are reboring my block and prepping the head , and they are experienced in flywheel machining and can certainly machine my old flywheel and install the new ring gear.

So that seems the most reliable and cost effective way of restoring your flywheel and ring gear.

regards
jeff

[B.S.F.]

These numbers are from parts manuals.
Ring gear for fly wheel 1.6 l engine 232404 (06100201 on) Ring gear for 2 L S2 246330
.W.

[gromit]

Firstly, the Series 1 flywheels are one piece and never had seperate ring gear. It seems that some had a separate ring gear hence part numbers for ring gears.
The flywheel cannot be rotated, as suggested, as it is fitted with permanent dowels. It was the ring gear, if separate, I suggested rotating.



Sounds like you have a solution and an engineering company that can machine to get the correct shrink fit.
I forget where I got the figures from when doing mine but I did have to borrow a very large micrometer.


Colin

[russellrovers]

Gentlemen,
Thanks for the advice and help.
Firstly, the Series 1 flywheels are one piece and never had seperate ring gear. The flywheel cannot be rotated, as suggested, as it is fitted with permanent dowels.

However, there is an answer to this. I got in touch with Ian Cox of Cox and Turner in the UK yesterday. They offer a flywheel repair service, but postage of the heavy flywheel to the UK and back again would be prohibitively expensive. He suggested that he can supply a brand new ring gear for £78 and will include the engineering drawings required to machine off the old ring and set the flywheel up to take the new ring gear.

So I then visited Performance Modifications, in Perth, who are reboring my block and prepping the head , and they are experienced in flywheel machining and can certainly machine my old flywheel and install the new ring gear.

So that seems the most reliable and cost effective way of restoring your flywheel and ring gear.

regards
jeff
hi i have second hand fly wheels here jim

[jedwards]

I can get what is effectively a brand new one by matching mine and fitting new ring gear. I think I would rather do that than risk and unknown one.
Thanks for the kind offer though Russell.

regards
jeff