Overcenter on Low Gear to High Gear Shift

Discuss all things Model T related.
Forum rules
If you need help logging in, or have question about how something works, use the Support forum located here Support Forum
Complete set of Forum Rules Forum Rules

Topic author
erkbrn
Posts: 18
Joined: Sat May 11, 2019 2:24 am
First Name: Eric
Last Name: Brown
Location: San Diego
Board Member Since: 2019

Overcenter on Low Gear to High Gear Shift

Post by erkbrn » Sat Oct 12, 2019 5:32 pm

I have recently changed my bands and am trying to get everything dialed in, and I am experiencing a problem where the low pedal goes overcenter only when the clutch lever is all the way forward (i.e. in high gear position). The pedal was fine when the lever was in neutral/first upright position. I attempted to adjust the clutch according to the diagram (pull the pedal all the way back, remove clevis, etc.) but the bolt the yoke attaches to isn't long enough to get the 1/16" play that is described. The yoke ends up about 1/4" or so from the pedal slot when yoke is adjusted all the way to the end. At the same time, I noticed that the clutch fingers are adjusted very tightly. The gap between the drive plate is closer to 1 1/8" from the suggested 13/16". Could these problems be related or are they a symptom of something worse?

The clutch fingers were adjusted this way before the band change.

Attached are pictures. These gaps occur when the clutch lever is all the way forward. The yoke is on the last 3 threads of the bolt and is unstable if adjusted any further.
Yoke Gap.jpg
Clutch Gap.jpg

User avatar

andrefordt
Posts: 106
Joined: Sun Jan 06, 2019 12:25 pm
First Name: Andre
Last Name: Valkenaers
Location: Scherpenheuvel
MTFCA Number: 23792
MTFCI Number: 19330

Re: Overcenter on Low Gear to High Gear Shift

Post by andrefordt » Sat Oct 12, 2019 6:08 pm

Eric,

I think the first thing to do is set the clutch right.
Set the handbrake lever all the way forwards and set clutch right using the caliber you have there. Than pull the handbrake lever backwards till the set bolt is just on top of the speed lever(3432). The clutch finger should be just clearing the clutch spring assembly(3344). If not adjust the set bolt.
Push the clutch pedal forwards till you feel it is touching the clutch pedal support (3442). Now you just need to adjust the slow speed connection till it fits .

Just how I should try to do it.

Andre
Belgium

User avatar

andrefordt
Posts: 106
Joined: Sun Jan 06, 2019 12:25 pm
First Name: Andre
Last Name: Valkenaers
Location: Scherpenheuvel
MTFCA Number: 23792
MTFCI Number: 19330

Re: Overcenter on Low Gear to High Gear Shift

Post by andrefordt » Sat Oct 12, 2019 6:13 pm

Just forgot to tell,

If you did it all right and the clutch is slipping in high gear, your clutch disks or the clutch spring are shot. Than you need to take it apart.

Good luck
André
Belgium


Topic author
erkbrn
Posts: 18
Joined: Sat May 11, 2019 2:24 am
First Name: Eric
Last Name: Brown
Location: San Diego
Board Member Since: 2019

Re: Overcenter on Low Gear to High Gear Shift

Post by erkbrn » Sat Oct 12, 2019 9:17 pm

Andre

Thanks for the advice, I will give it a shot. To what piece of literature are the numbers in your reply referring to? (ex. 3432)

User avatar

andrefordt
Posts: 106
Joined: Sun Jan 06, 2019 12:25 pm
First Name: Andre
Last Name: Valkenaers
Location: Scherpenheuvel
MTFCA Number: 23792
MTFCI Number: 19330

Re: Overcenter on Low Gear to High Gear Shift

Post by andrefordt » Sat Oct 12, 2019 11:57 pm

Ford
The universal Car
Price List of Parts
Model T
Effective August 5,1928


Kenny Edmondson
Posts: 44
Joined: Mon Jan 07, 2019 8:26 am
First Name: Kenny
Last Name: Edmondson
Location: Indianapolis, IN

Re: Overcenter on Low Gear to High Gear Shift

Post by Kenny Edmondson » Sun Oct 13, 2019 10:03 am



Topic author
erkbrn
Posts: 18
Joined: Sat May 11, 2019 2:24 am
First Name: Eric
Last Name: Brown
Location: San Diego
Board Member Since: 2019

Re: Overcenter on Low Gear to High Gear Shift

Post by erkbrn » Sun Oct 13, 2019 4:40 pm

Update:

I got the fingers adjusted to the proper clearance, and the compression/uncompression distance of the spring is much greater now. The clevis fits now when I follow the adjustment diagram, but now there's an issue where the clutch pedal is actuating between low and high gear even when the clutch lever is in middle position. The clutch pedal is very difficult to press as well. Adjusting the set bolt on the lever fixes this issue to an extent, but it has to be adjusted so much that it gets stuck when the lever goes from forward to back (meaning that is configuration isn't usable). Anybody have a suggestion?


Scott_Conger
Posts: 1340
Joined: Sun Jan 06, 2019 11:18 am
First Name: Scott
Last Name: Conger
Location: Clark, WY
Board Member Since: 2005

Re: Overcenter on Low Gear to High Gear Shift

Post by Scott_Conger » Sun Oct 13, 2019 6:32 pm

Get experienced eyes to go over everything very carefully. Simply changing bands should NOT have required all of the adjustments (and now maladjustments) that you've gone through.

Under the assumption that the car was running prior to the band change, and now new bands are installed. Only very minor adjustment(s) should have been required.

It unfortunately sounds as though you have moved, screwed and adjusted everything under the floorboards now and those multitude of adjustments cannot likely be undone by well-intentioned people over the internet. In the future, never initiate wholesale multiple adjustments at once. Too many variables now to cypher out.

Call for on-site help.

Good luck. You'll be on the road as soon as someone who has been through this before lays eyes on it (and your best friend the VW mechanic is not the guy you want...find a "T" guy)
Scott Conger

Full Flow Float Valves - deliver fuel like Henry intended!

Post Reply Previous topicNext topic