| Off Topic Kinda. Anyone that can Machine a Gear [message #174037] |
Wed, 20 June 2012 11:15  |
Donovan-formerly Jase386
Messages: 139
Registered: January 2009
Location: Greenville SC
Karma: 0
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I thought i would check here and see if anyone could help. Have a seat motor in another GM car that has stripped a gear. GM engineers designed this to be difficult and i cant replace just the motor, only the $1000 track which includes 4 motors. i want to disassemble and have brass gears made to replace the nylon gears. Does anyone have the tools to do it, or know of a place that will do it by a mail in reference piece?
Donovan, Greenville SC
1975 Eleganza II
81,500 miles
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| Re: Off Topic Kinda. Anyone that can Machine a Gear [message #174038 is a reply to message #174037] |
Wed, 20 June 2012 11:20  |
C Boyd
Messages: 2629
Registered: April 2006
Karma: 18
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Sir: Can`t help on the brass gear, but i got a friend that works on 3-d copiers and can probably make a new plastic gear if it would help. He would need an engineering drawing with dimentions.
| Donovan-formerly Jase386 wrote on Wed, 20 June 2012 12:15 |
I thought i would check here and see if anyone could help. Have a seat motor in another GM car that has stripped a gear. GM engineers designed this to be difficult and i cant replace just the motor, only the $1000 track which includes 4 motors. i want to disassemble and have brass gears made to replace the nylon gears. Does anyone have the tools to do it, or know of a place that will do it by a mail in reference piece?
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C. Boyd
76 Crestmont
East Tennessee
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| Re: Off Topic Kinda. Anyone that can Machine a Gear [message #174043 is a reply to message #174037] |
Wed, 20 June 2012 11:27 |
Dennis S
Messages: 3046
Registered: November 2005
Karma: 2
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| Donovan-formerly Jase386 wrote on Wed, 20 June 2012 11:15 |
I thought i would check here and see if anyone could help. Have a seat motor in another GM car that has stripped a gear. GM engineers designed this to be difficult and i cant replace just the motor, only the $1000 track which includes 4 motors. i want to disassemble and have brass gears made to replace the nylon gears. Does anyone have the tools to do it, or know of a place that will do it by a mail in reference piece?
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Any chance they are standard size and you could buy from McMaster on another online source...
http://www.mcmaster.com/#standard-gears/=i27dxo
Dennis S
73 Painted Desert 230
Memphis TN Metro
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| Re: [GMCnet] Off Topic Kinda. Anyone that can Machine a Gear [message #174049 is a reply to message #174037] |
Wed, 20 June 2012 11:34 |
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ljdavick
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma: -3
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I’ll bet with some investigation you will find an off-the-shelf brass gear. Granger, Fastenall??
Larry Davick
The Mystery Machine
1976(ish) Palm Beach
Fremont, CA
On Jun 20, 2012, at 9:15 AM, jase386 wrote:
>
>
> I thought i would check here and see if anyone could help. Have a seat motor in another GM car that has stripped a gear. GM engineers designed this to be difficult and i cant replace just the motor, only the $1000 track which includes 4 motors. i want to disassemble and have brass gears made to replace the nylon gears. Does anyone have the tools to do it, or know of a place that will do it by a mail in reference piece?
> --
> Donovan, Greenville SC
> 1975 Eleganza II (Ella)
> 72,500 miles
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
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| Re: Off Topic Kinda. Anyone that can Machine a Gear [message #174066 is a reply to message #174059] |
Wed, 20 June 2012 13:04 |
Donovan-formerly Jase386
Messages: 139
Registered: January 2009
Location: Greenville SC
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i have yet to dismantle the seat mechanism to get the motor and gear out. the new hasnt worn off the car enough for me to let it sit a week or two while i investigate. you know how we GMCers do, we buy first, research later...
Im hoping a local supply house will have a gear that will work, as im not even sure if its a worm gear or a toothed gear. I like Chuck's idea of the copier if no luck. and they can probably use some really good nylon.
I do know the construction of the motor is a bear as the broken car is somehow welded to the shaft of the motor. This is all going from articles ive read. somewhere, i can get a similar gear im sure, i just thought maybe brass would hold up better under a seat with heavy butts in it.
Donovan, Greenville SC
1975 Eleganza II
81,500 miles
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| Re: [GMCnet] Off Topic Kinda. Anyone that can Machine a Gear [message #174129 is a reply to message #174091] |
Wed, 20 June 2012 20:48 |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
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I don't know if this applies, but I worked on a 1961 Cadillac with a 6 way
power seat. It had a transmission of sorts and one motor that ran forwards
and backwards. The gears were shifted with solenoids and as I recall, they
were made of metal, not plastic. It was a very complex and I am sure
expensive unit that was totally repairable. My 77 Cad had the same unit.
They get full of carpet fuzz and the solenoids hang up. Might be what is
the issue with yours.
Jim Hupy
Salem, OR
78 GMC Royale 403
On Wed, Jun 20, 2012 at 3:33 PM, Robert Mueller <robmueller@iinet.net.au>wrote:
> Donovan,
>
> Have you tried your local Men's Mall (Pick a Part)?
>
> Regards,
> Rob M.
>
> -----Original Message-----
> From: jase386
>
> I thought i would check here and see if anyone could help. Have a seat
> motor in another GM car that has stripped a gear. GM
> engineers designed this to be difficult and i cant replace just the motor,
> only the $1000 track which includes 4 motors. i want to
> disassemble and have brass gears made to replace the nylon gears. Does
> anyone have the tools to do it, or know of a place that will
> do it by a mail in reference piece?
> --
> Donovan,
>
> _______________________________________________
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| Re: Off Topic Kinda. Anyone that can Machine a Gear [message #176355 is a reply to message #174037] |
Wed, 11 July 2012 15:41 |
Donovan-formerly Jase386
Messages: 139
Registered: January 2009
Location: Greenville SC
Karma: 0
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Sorry for not getting back to everyone sooner. I keep waiting for a car like mine to show up in the local yard so i can pull a motor out to experiment with.
If anyone gets bored, i have a 2001 Buick Park Avnue. When you read up on it, youll see that every one of the things manufactured had seat trouble. The thigh support on the drivers side and butt support on passenger side. The cause is a plastic gear in the motor.
Sounds simple enough...until you start trying to find a motor and learn that the General had the "seat adjuster" made with the motors in place with the expectation that when the gears broke, folks would just anty up $1000 or better for a whole new "seat adjuster". Well i own a GMC so we know my pockets dont run deep like the new chevys. In a forum, a fellow mentioned having his own brass gears machined and installed into his motor, to turn the worm gear and shaft to adjust the seat. I havent had the time and its been too blasted hot to fool with anything since i first posted. This is something i will have to have repaired, as it ruins my seat comfort. Once i can get my hands on a motor to play with, i can pull the gear out and see if any of the local houses can match it up. im sur esomeone has something..
Donovan, Greenville SC
1975 Eleganza II
81,500 miles
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| Re: Off Topic Kinda. Anyone that can Machine a Gear [message #176377 is a reply to message #176355] |
Wed, 11 July 2012 21:33 |
Adrien G.
Messages: 474
Registered: May 2008
Location: Burns Flat, OK 73624
Karma: 1
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Donovan,
>>>>> In a forum, a fellow mentioned having his own brass gears machined and installed into his motor, to turn the worm gear and shaft to adjust the seat. <<<<<<
Worm Gear? A single lead worm can be made on most lathes.
Multiple leads ( 2, 3, more ) are also done on lathes with a fixture or some way to index for the number of starts, and the carriage feed gearing required to do the worm helix ( tooth lead angle ). A Machinist Reference book has all the info to do it.
A good old non-push button machinist should be able to do it. A young push button machinist will need to write a program to do it, not cost effective for just one.
There maybe more torque or resistance in the mechanism that the plastic worm can take. And it's also built-in part sales by the car mfg.
Hope this is of some help to you.
Adrien & Jenny Genesoto
75 Glenbrook (26-3) Mods LS3.70 FD / Reaction Sys / 80mm Front&Intermidiate / Hydroboost / 16" Tires / Frame Rebuild / Interior Rebuild
Yuba City,Ca. Text 530-nine-3-three-3-nine-nine-6
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