Who knows why???
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got10carz
Topic author - Posts: 552
- Joined: Sun Jan 06, 2019 6:37 pm
- First Name: Steve
- Last Name: Meixner
- * REQUIRED* Type and Year of Model Ts owned: 1911,13,14,19,23,25,26,27
- Location: Moorhead MN
Who knows why???
Machined all the way around. Maybe 26-27 and had to much fun in the lathe?
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Dan Hatch
- Posts: 5009
- Joined: Tue Jan 08, 2019 7:31 pm
- First Name: Dan
- Last Name: Hatch
- Location: Alabama
Re: Who knows why???
See if it is a narrow drum with removable shoes.
That could be one of the special driven plate we have heard of.
That could be one of the special driven plate we have heard of.
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Kerry
- Posts: 1447
- Joined: Mon Jan 07, 2019 2:42 pm
- First Name: Frank
- Last Name: van Ekeren
- * REQUIRED* Type and Year of Model Ts owned: 1916 touring, 1916 pick-up, 1924 coupe, 1926 touring, 1927 touring
- Location: Rosedale Vic Australia
Re: Who knows why???
I think you are right in 26/7 but not a lathe modification, but the bolt holes made over size to make it fit a narrow drum.
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got10carz
Topic author - Posts: 552
- Joined: Sun Jan 06, 2019 6:37 pm
- First Name: Steve
- Last Name: Meixner
- * REQUIRED* Type and Year of Model Ts owned: 1911,13,14,19,23,25,26,27
- Location: Moorhead MN
Re: Who knows why???
Dan, I've had 3 or 4 of the drums you are referring. Each 1 had a older cover with slotted holes. I came to the conclusion that there wasn't a special cover. Maybe this is 1. Maybe tomorrow there will be an answer.
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Dan Hatch
- Posts: 5009
- Joined: Tue Jan 08, 2019 7:31 pm
- First Name: Dan
- Last Name: Hatch
- Location: Alabama
Re: Who knows why???
I think the Service Bulletins say there is a special plate, but you can oversizevthe holes on a standard plate.
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Kerry
- Posts: 1447
- Joined: Mon Jan 07, 2019 2:42 pm
- First Name: Frank
- Last Name: van Ekeren
- * REQUIRED* Type and Year of Model Ts owned: 1916 touring, 1916 pick-up, 1924 coupe, 1926 touring, 1927 touring
- Location: Rosedale Vic Australia
Re: Who knows why???
Slotted holes would make it interesting, it's hard enough to get a zero run out on the drive plate to drum for the normal parts.
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Dan Hatch
- Posts: 5009
- Joined: Tue Jan 08, 2019 7:31 pm
- First Name: Dan
- Last Name: Hatch
- Location: Alabama
Re: Who knows why???
I don’t think Ford cared about runout.
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Allan
- Posts: 6609
- Joined: Sun Jan 06, 2019 7:21 pm
- First Name: Allan
- Last Name: Bennett
- * REQUIRED* Type and Year of Model Ts owned: 1912 van, 1917 shooting brake, 1929 roadster buckboard, 1924 tourer, 1925 barn find buckboard, 1925 D &F wide body roadster, 1927LHD Tudor sedan.
- Location: Gawler, Australia
Re: Who knows why???
Whatever, it is a bad fit-up. The narrow brake drum has a narrower surface than the low gear and reverse drums. The outer diameter of the driven plate forms part of the surface of the brake drum usually. It's not there in this application. Bad news all round.
Allan from down under.
Allan from down under.
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speedytinc
- Posts: 4725
- Joined: Fri Feb 12, 2021 12:24 pm
- First Name: john
- Last Name: karvaly
- * REQUIRED* Type and Year of Model Ts owned: 14/15 wide track roadster. 23 touring, 27 roadster pickup, 20ish rajo touring
- Location: orange, ca
- Board Member Since: 2020
Re: Who knows why???
Its a 26-7 drive plate with modified (larger) diameter bolt pattern.
Still usable in a 26-7 application if not for the worn out u-joint drive.
Modifying an early (pre 26) drive plate to use on a 26-7 brake drum requires the OD of the plate turned down & the bolt pattern diameter decreased.
Note the sharp edges on the brake drum. That would have chewed the edge of the band lining. As previously stated, the drive plate edge becomes part of the brake drum surface. Not obvious because of camera angle, the drum width as pictured is a good 1/4" to narrow.
Regarding run out: Not an issue If the drive plate base is square & the bushing is in spec. Remember the drive plate fits over/onto the transmission center shaft with a bushing that centers it with less than .005" clearance, it couldnt run out more than .005".
Same as the correct drive plate.
Nasty worn u-joint drive. Must have had a warford with the smaller square shaft or equivalent non OEM drive.
Still usable in a 26-7 application if not for the worn out u-joint drive.
Modifying an early (pre 26) drive plate to use on a 26-7 brake drum requires the OD of the plate turned down & the bolt pattern diameter decreased.
Note the sharp edges on the brake drum. That would have chewed the edge of the band lining. As previously stated, the drive plate edge becomes part of the brake drum surface. Not obvious because of camera angle, the drum width as pictured is a good 1/4" to narrow.
Regarding run out: Not an issue If the drive plate base is square & the bushing is in spec. Remember the drive plate fits over/onto the transmission center shaft with a bushing that centers it with less than .005" clearance, it couldnt run out more than .005".
Same as the correct drive plate.
Nasty worn u-joint drive. Must have had a warford with the smaller square shaft or equivalent non OEM drive.