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-   -   Drive Belt For Autohelm 4000 (http://www.sailnet.com/forums/gear-maintenance/43029-drive-belt-autohelm-4000-a.html)

becky52 05-10-2008 01:12 PM

Drive Belt For Autohelm 4000
 
Does anyone know where we can get a drive belt for an autohelm 4000?

Thanks

Mikelivingstone 05-11-2008 04:49 PM

Depends where u r based, usually belt kit is available from Autohelm/ raymarine dealers, kit also includes the tool required to open the unit for belt removal.
Mike

wdtracey 07-14-2008 02:47 PM

ST 4000 belt
 
do a search on sailnet it was posted first under Irwin and then under gear and maintenance.

kvaavik 07-21-2008 06:12 PM

Becky,

I went through an exhaustive search a few months ago with no luck. Raymarine is of absolutely no help, they claim to have no more belts and the solution is to buy a new autopilot. The best alternative I could find was to have a belt fashioned from polyurethane with a Kevlar core (the original belt is poly w/steel core). There are a number of companies that will make these custom belts. Good luck, and a pox on Raymarine!

If you do find a place to order or make a belt, you have to know the specifics about the belt. Mine, off an Autohelm 4000, was an AT9-765. "AT" indicates the shape of the tooth profile, "9" indicates 9mm wide, and "765" indicates a circumference of 765 mm. Good luck, I hope you find one.

JSL3 07-21-2008 08:32 PM

I was looking for the service manual the other day for the autohelm 4000 and I downloaded it. The part number is "D169" if that helps. I did a quick search on that part number and couldn't come up with anything other than what kvaavik said about Raymarine's solution being upgrade. A search for "autohelm 4000 parts" did turn up this site tho for a custom belt company Polytech Design Inc - Timing Belts & Pulleys. I couldn't find the part there, but you may try to call them??
Good luck.

sailingdog 07-21-2008 09:05 PM

From another thread on the same subject:

Quote:

Originally Posted by wdtracey (Post 325533)
As anybody who has tried to replace the drive belt knows, Ratheon no longer sells the replacement belt. A belt is available from the supplier below at about $16.00. It has steel cords and is a neoprene

Poly Tech Design
26 West First St
Clifton N.J. 07011
800 859 7659
tHIER NUMBER IS: B10AT5/750 FPS
cOMPARABLE TO::
425 syncroflex AT 5/750


BTW, google is your friend... :)

rwberman 07-21-2008 10:27 PM

Where can I get a used wheeldrive unit?
 
My Autohelm ST4000 drive unit seems to have failed. I can't get the belt tension adjusted well enough to hold the clutch in the engaged position. Anybody know someone who wants to sell a working unit without the electronics?

Respite

sailingdog 07-21-2008 10:43 PM

Rwberman-

Really shouldn't hijack a thread... you'll get better results posting your own thread. Would also suggest you read the post in my signature.

beej67 07-22-2008 09:41 AM

Might not be as much of a hijack as you think, Dog.

Quote:

Originally Posted by rwberman (Post 344245)
My Autohelm ST4000 drive unit seems to have failed. I can't get the belt tension adjusted well enough to hold the clutch in the engaged position. Anybody know someone who wants to sell a working unit without the electronics?

Respite

Berman, try replacing the belt first. The old Raytheon belts tended to stretch, a *lot*, and the Poly Tech belt listed above is shade smaller in diameter than the old Raytheon belts, so they have better holding tension. (I just bought a few)

Also, if the handle won't stay engaged, but your existing unit still works fine as long as the handle is held in place, then just tie a piece of shock cord around the drive and use that to hold the handle down. I know of quite a few people who've done that with their ST4000s, as did I for a couple years before I bought new belts as per above. Yeah, it's kinda ghetto, but what works, works.

If you haven't ever replaced a belt before, it's pretty easy. The front and back halves of the unit snap together, so you can snap them apart (gently) with a long screwdriver. You'll need to remove some screws on a housing to get at the belt, but it's a piece of cake.

JSL3 07-22-2008 11:10 AM

Quote:

Originally Posted by beej67 (Post 344396)
Also, if the handle won't stay engaged, but your existing unit still works fine as long as the handle is held in place, then just tie a piece of shock cord around the drive and use that to hold the handle down. I know of quite a few people who've done that with their ST4000s, as did I for a couple years before I bought new belts as per above. Yeah, it's kinda ghetto, but what works, works.

I did a similar thing to solve this problem on my Autohelm 4000. The clutch lever wouldn't stay in the engaged position so I inserted a wide diameter rubber band between the clutch lever and the back of the drive unit. The little bit of friction that the rubber band introduced solved the problem. Agreed, it is a little ghetto, but it works so far.
Good luck.<O:p</O:p


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