Autohelm ST4000 Wheel pilot - Page 2 - SailNet Community
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post #11 of 27 Old 03-14-2011
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We had an older wheelpilot (Autohelm 4000?) that kept breaking down. First the belt, then a shear pin, then the plastic gears, then more shear pins. It went back to Raytheon several times. About a dozen years ago we replaced it with a below deck autopilot.

It was a lot more money, but well-worth it for the reliability and robust performance. We can use in in much heavier weather than the old wheelpilot.
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post #12 of 27 Old 03-16-2011
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Quote:
Originally Posted by RecoveringRacer View Post
Although Raymarine is poor at supporting older products, I have a contact with a fairly large inventory of parts for older Autohelm/Raymarine autopilots who also does repairs--he also bought my remaining inventory when I retired. Very few of his items are listed on eBay, but you can contact him there through the ID kodiakjack99.
Thanks to this thread I have the part I needed for my obsolete autohelm on the way from kodiakjack.

I saw this thread yesterday and contacted him through ebay and lo and behold he had the part I needed and its on the way. As you said he only had a few things advertised, so you have to ask if he has what you need.

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post #13 of 27 Old 04-17-2011
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st4000+ Belt replacement

Does anyone know how to open up the cover to get to the belt? The book says "remove front cover by pulling it up and away from the back cover" some FAQ on the Raymarine site said a special tool is required. "Raymarine offers a wheel drive service kit, part number D169, which should restore the drive unit to like-new operation. The kit contains a custom tool for opening the wheel drive unit, a replacement belt, waterproof grease and instructions. " Does anyone know what this custom tool is ?
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post #14 of 27 Old 04-17-2011
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The "special tool" is a plastic wedge. If you have the black drive, seperate the two halfs by placing a screwdriver between them and twist. A second screwdriver, placed 4-5 inches away from the first, will make it easier. It just snaps apart.
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post #15 of 27 Old 04-18-2011
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Thanks, I figured as much. Mine is a "grey" colored unit. I tried prying it off with two 1.5" wide wood chisels and several screw drivers, it doesn't want to budge, and I'm afraid of breaking something and then will have to replace the entire thing.
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post #16 of 27 Old 04-18-2011
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If you have the grey unit (mark II), make sure that you have removed the three brackets that hold the wheel to the spokes of your helm wheel. If I remember, when those are attached, the halfs won't seperate.
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post #17 of 27 Old 05-08-2011
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ST 4000+ Died

I read below that there are issues finding a replacement for the, per diagram, part #2, the housing for the black body ST 4000+. It failed so I took it apart and found 2 rollers snapped off... right after a crew member "forced" the wheel without disengaging the pilot. Nice, huh? So... are these findable or does someone have an old part I can acquire? Your thoughts and input appreciated.
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post #18 of 27 Old 05-08-2011
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On my own wheelpilot installation, I opted to use the exposed motor and belt that was supplied with the Autohelm 3000 and ST3000--even though I was using the then state-of-the-art S1G autopilot and ST6002 control unit. My choice was made because it was simpler, and because it could be easily removed when not needed.

I suspect the enclosed ST4000 design was partially dictated by safety issues, which I appreciate now that I have a four-year old grandson helping me in the cockpit. (I'm presently working on a below-deck linear actuator installation.)
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post #19 of 27 Old 05-08-2011
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Quote:
Originally Posted by rich270 View Post
I read below that there are issues finding a replacement for the, per diagram, part #2, the housing for the black body ST 4000+. It failed so I took it apart and found 2 rollers snapped off... right after a crew member "forced" the wheel without disengaging the pilot. Nice, huh? So... are these findable or does someone have an old part I can acquire? Your thoughts and input appreciated.
These broken plastic rollers are a common failure point on the older black drive units. I've seen some people cobble them back together with new attachments (putting small bolts in) so I guess it's doable... I do believe the newer (grey) units are available separately and they should work with whatever controller you're using.

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post #20 of 27 Old 06-21-2012
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Re: Autohelm ST4000 Wheel pilot

Since I keep using Google to help me with issues and it keeps bringing me back to Sailnet, I guess it's time to register & post a question.

I've been tinkering with my ST4000, and received a black unit (with all the internal wheels attached) but it didn't have a belt. I have looked, to no avail, for a blow-up diagram of the inside so I can re-run my drive belt (from my old unit, with missing internal wheels). I think it was LouAnn who mentioned she'd found a diagram.

I"m hoping someone else is better at Google than I am. I need to get the unit back together to see 1: if it will work with the current belt and 2: if it's still going to work, do I need a new belt. That diagram will help loads to see just where the thing runs. My unit popped open when it lost an internal wheel, and I never actually saw it in the proper position.


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