Fan drive

olebusman · November 06, 2021, 07:59:30 AM

Well, I guess I'm 1 of them. I'm broke down in Pigeon Forge
My fan drive gave up the ghost. I have a 4106 with a 6V92 out of a flxible grumnum, can't spell. It has a direct drive fan and it just free wheels. Does anybody on the east have parts or a whole unit.
]

chessie4905 · November 06, 2021, 08:28:54 AM

try Luke at U S Coach New Berlin, N.J.
I have a direct drive one on an 8v-71 out of a 4905 sitting in shop, but suspect it is different from yours. I guess you don't have the donut shaped torus type either.

richard5933 · November 06, 2021, 10:36:38 AM

Are those units really direct drive or do they have a gearing inside them. If my memory is correct, those are rebuildable. Hopefully Luke will have the necessary parts to get yours back on the road again without too much trouble.

olebusman · November 06, 2021, 12:13:58 PM

I've got the fan drive off. All I need is the coupling from the crankshaft to the fan drive. It's a drive with a rubber center to dampen the pulses of the crank to the fan housing. Does that sound like what you have Chessie? I've called Luke twice and no callback. Do you guys need a picture of the dampener

Bill Gerrie · November 06, 2021, 01:31:19 PM

John
Keep trying Luke. I got parts once for mine from him. I have never had the drive off so no idea of what it looks like.

luvrbus · November 06, 2021, 01:42:43 PM

I thought I had that coupling but guess it got tossed or I gave it to Larry for his

RJ · November 06, 2021, 01:47:39 PM

Quote from: olebusman on November 06, 2021, 12:13:58 PM
I've called Luke twice and no callback.

FYI, Luke doesn't work weekends, only M-F 9:30 - 4:00 Eastern. 1-888-262-2434.

FWIW & HTH . . .

luvrbus · November 06, 2021, 01:57:21 PM

Quote from: richard5933 on November 06, 2021, 10:36:38 AM
Are those units really direct drive or do they have a gearing inside them. If my memory is correct, those are rebuildable. Hopefully Luke will have the necessary parts to get yours back on the road again without too much trouble.

Some are direct drive other have clutch package the oil engages

luvrbus · November 06, 2021, 01:59:00 PM

Quote from: richard5933 on November 06, 2021, 10:36:38 AM
Are those units really direct drive or do they have a gearing inside them. If my memory is correct, those are rebuildable. Hopefully Luke will have the necessary parts to get yours back on the road again without too much trouble.

Some are direct drive other have clutch package the oil engages,Luke didn't have the coupling when Larry was looking for one,me I would find a belt drive from a RTS and lose the GM drive

richard5933 · November 06, 2021, 05:35:38 PM

GM used the torus drive on some buses like the 4106 and some Buffalo models. On others, like my 4108 they didn't. From a quick glance mine looks like a direct drive, but it's not. True, it's a mechanically driven fan and not hydraulically driven but it's not a direct drive. According to the manual it's driven at a ratio of 1.0 to 1.59 and there are many moving parts inside there to go bad.

If you called Luke today you won't get a callback till Monday. He isn't open on weekends.

luvrbus · November 06, 2021, 05:49:15 PM

Quote from: richard5933 on November 06, 2021, 05:35:38 PM
GM used the torus drive on some buses like the 4106 and some Buffalo models. On others, like my 4108 they didn't. From a quick glance mine looks like a direct drive, but it's not. True, it's a mechanically driven fan and not hydraulically driven but it's not a direct drive. According to the manual it's driven at a ratio of 1.0 to 1.59 and there are many moving parts inside there to go bad.

If you called Luke today you won't get a callback till Monday. He isn't open on weekends.
[/quote

Richard he doesn't have the old GM parlor coach drive some transits had a direct drive with a fan clutch some were belt driven some had the drive with the clutch pack from the 6v92 sounds like your drive has the clutch pack inside the housing but there is a direct drive.I removed one from Red Riders 8v71 him and Dan were trying to find parts to make it work on a 4106

olebusman · November 06, 2021, 05:59:56 PM

I'm setting here in a campground with no idea of where to find a coupling. The fan drive is out of a 82 grummen fixable transit ( 870 I think)I'm trying to post pictures. I might get lucky this time. Yes, I know Luke don't work weekends. I talked to him twice on Friday

olebusman · November 06, 2021, 06:05:32 PM

A couple more pictures.

Bill Gerrie · November 06, 2021, 06:27:32 PM

Could you drill a hole and put a bolt through it to get you home? Maybe two ways for strength. Just a thought.

chessie4905 · November 07, 2021, 05:24:59 AM

Thanks for pictures. Will need to check today to see if mine is same.