Author Topic: trike diff  (Read 404 times)

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Offline david lee

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trike diff
« on: January 07, 2018, 03:07:52 PM »
just some pics of the modified ford diff

Online Hossamania

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Re: trike diff
« Reply #1 on: January 07, 2018, 03:20:59 PM »
Can you show a picture of how the chain drives that rear end?
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Offline david lee

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Re: trike diff
« Reply #2 on: January 08, 2018, 03:31:48 AM »
more pics

Online Hossamania

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Re: trike diff
« Reply #3 on: January 08, 2018, 06:03:43 AM »
Good pics, I'm sure someone here has some info on it.
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Offline friday

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Re: trike diff
« Reply #4 on: January 08, 2018, 11:00:04 AM »

split diffs are model T era . dagenham era diffs are typical one piece cast .

servi have a few changes
http://www.classic-motorcycle-build.com/servi-car-axle.html

Offline Dan89flstc

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Re: trike diff
« Reply #5 on: January 08, 2018, 01:56:04 PM »
Is that a straight axle?

Offline david lee

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Re: trike diff
« Reply #6 on: January 08, 2018, 02:44:51 PM »
Is that a straight axle?
not that i know of.a mate says it works of spider gears whatever that means will ask more questions

Offline FSG

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Re: trike diff
« Reply #7 on: January 08, 2018, 03:02:09 PM »
Is that a straight axle?
not that i know of.a mate says it works of spider gears whatever that means will ask more questions

Lift one wheel off the ground, can you rotate it?

Offline JW113

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Re: trike diff
« Reply #8 on: January 08, 2018, 07:57:40 PM »
So does that mean it's a Servi-car axle?

-JW
2004 FLHRS   1977 FLH Shovelhead  1992 FLSTC
1945 Indian Chief   1978 XL Bobber

Offline david lee

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Re: trike diff
« Reply #9 on: January 08, 2018, 11:50:32 PM »
just jacked up left rear wheel and spins freely

Offline FSG

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Re: trike diff
« Reply #10 on: January 09, 2018, 12:17:28 AM »
 :up:   good, spider gears of some sort, will allow going around corners a lot easier than a solid axle

Offline david lee

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Re: trike diff
« Reply #11 on: January 09, 2018, 12:31:31 AM »
:up:   good, spider gears of some sort, will allow going around corners a lot easier than a solid axle
thats a relief.i did post that the steering damper was adjusted to the highest setting (clockwise) to me thats for highway use not city would you agree on that. thank you fsg

Offline FSG

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Re: trike diff
« Reply #12 on: January 09, 2018, 12:44:00 AM »
yes, I'd probably disconnect it to see how the trike rides, maybe it's not needed

Offline hbkeith

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Re: trike diff
« Reply #13 on: January 09, 2018, 01:06:27 AM »
cant tell in pics , is the diff dead center of rearend  , or is it off center  ?   have jackshaft ?
« Last Edit: January 09, 2018, 01:19:16 AM by hbkeith »

Offline david lee

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Re: trike diff
« Reply #14 on: January 09, 2018, 01:46:41 AM »
cant tell in pics , is the diff dead center of rearend  , or is it off center  ?   have jackshaft ?
what do you mean rear end.its off centre.jack shaft not sure thanks

Online Hossamania

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Re: trike diff
« Reply #15 on: January 09, 2018, 04:27:00 AM »
A jackshaft would be a secondary gear/shaft to offset the chain from the transmission. Instead of a direct drive chain from the transmission to the rear end, the shaft would be used between the two to line the chain up with the rear end, resulting in two chains being used, one from tranny to jackshaft, a second from jackshaft to rear end.
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Offline crock

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Re: trike diff
« Reply #16 on: January 09, 2018, 04:43:04 AM »
  :scratch:  Curious how the spider gears/ inner bearings get lubed with the housing being open like that
Crock

Offline david lee

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Re: trike diff
« Reply #17 on: January 09, 2018, 01:57:35 PM »
  :scratch:  Curious how the spider gears/ inner bearings get lubed with the housing being open like that
never thought of that either.a mate did have a look and said the bearings are sealed

Offline Julio

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Re: trike diff
« Reply #18 on: January 09, 2018, 03:55:57 PM »
Looking at the link Friday posted, it appears that the DNA axle is a copy, with some improvements, of the Servicar axle.

Here's a DNA axle I used on a Sporty build.


The gearbox is actually pretty small, about the size of two soupbowls put together. It's lubricated with wheel bearing grease. You can see in the picture where there's a grease fitting on the case I removed to get access to the gears..



The outer housing holds everything together. Remove the bolts and the axles slide right out.





There are grease fitting for the tapered bearings on each side of the gearcase, and the wheel bearings are sealed.
Pretty simple.

Offline JW113

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Re: trike diff
« Reply #19 on: January 09, 2018, 07:06:50 PM »
And the side/spider gears run with no lubrication at all, right? I suppose this is fine, since the only time they see any movement is when the bike is turning, and even then, very little movement.

-JW
2004 FLHRS   1977 FLH Shovelhead  1992 FLSTC
1945 Indian Chief   1978 XL Bobber

Offline hbkeith

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Re: trike diff
« Reply #20 on: January 10, 2018, 01:42:02 AM »
cant tell in pics , is the diff dead center of rearend  , or is it off center  ?   have jackshaft ?
what do you mean rear end.its off centre.jack shaft not sure thanks
      Hoss explained it .   , I cant see your pics Julio ,   can you show a pic from strait behind trike and one off whole drive  chain  davidlee ?
« Last Edit: January 10, 2018, 02:01:13 AM by hbkeith »

Offline Julio

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Re: trike diff
« Reply #21 on: January 10, 2018, 05:14:31 AM »
And the side/spider gears run with no lubrication at all, right? I suppose this is fine, since the only time they see any movement is when the bike is turning, and even then, very little movement.

-JW


Everything in the case is packed with bearing grease.


If you can't see these, let me know.







« Last Edit: January 10, 2018, 09:10:11 AM by Julio »

Offline koko3052

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Re: trike diff
« Reply #22 on: January 10, 2018, 08:11:08 AM »
Nothing shows up on my screen either. :scratch:

Offline JW113

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Re: trike diff
« Reply #23 on: January 10, 2018, 08:30:46 AM »
Me too, no images. Really curious as hell how they seal the opening for the chain and all those greased up parts from the outside world. Else, wouldn't that thing fill up with dirt/sand/water?

-JW
2004 FLHRS   1977 FLH Shovelhead  1992 FLSTC
1945 Indian Chief   1978 XL Bobber

Online Hossamania

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Re: trike diff
« Reply #24 on: January 10, 2018, 08:48:57 AM »
From the picture posted in the "engine mount" thread, it does not appear to have a jackshaft.
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Offline Julio

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Re: trike diff
« Reply #25 on: January 10, 2018, 09:27:26 AM »
The sprocket is sandwiched between the gear cases.
I've loaded the pics to another server. If you can't see them now  :idunno:

Offline friday

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Re: trike diff
« Reply #26 on: January 10, 2018, 10:23:41 AM »
pics show ok .
being rigid itd be possible to use FLHT plastic chain case to enclose the lot if need be .
that would be extended chain too

Offline FSG

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Re: trike diff
« Reply #27 on: January 10, 2018, 11:22:38 AM »

Offline david lee

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Re: trike diff
« Reply #28 on: January 10, 2018, 01:59:03 PM »
Me too, no images. Really curious as hell how they seal the opening for the chain and all those greased up parts from the outside world. Else, wouldn't that thing fill up with dirt/sand/water?

-JW
sunny dry road riding