Autohelm ST4000 Plus problems - Page 3 - SailNet Community
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post #21 of 48 Old 10-16-2012
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Re: Autohelm ST4000 Plus problems

Here is a picture of the wheel assembly. The same screws that mount the wheel pilot to your steering wheel may be what holds it together.

Wheelilot | Flickr - Photo Sharing!

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Last edited by Silvio; 10-16-2012 at 05:16 PM.
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post #22 of 48 Old 10-16-2012
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Re: Autohelm ST4000 Plus problems

The two halves snap together. No bolts or screws. Use several large screwdrivers a few inches apart and twist the screwdrivers. The two halves should pop apart. If the belt is shreaded, carefully check the pinion gear that drives the belt. The wires inside the belt can cut into the gear and ruin it. Early gears were plastic and often crack.
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post #23 of 48 Old 10-16-2012
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Re: Autohelm ST4000 Plus problems

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The two halves snap together. No bolts or screws. Use several large screwdrivers a few inches apart and twist the screwdrivers. The two halves should pop apart. If the belt is shreaded, carefully check the pinion gear that drives the belt. The wires inside the belt can cut into the gear and ruin it. Early gears were plastic and often crack.
Hey CaptainDan99, I was hoping you would jump in here.
Thanks!

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post #24 of 48 Old 10-18-2012
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Re: Autohelm ST4000 Plus problems

Hallo again Silvio,

Here is the thing. The ring popped open under pressure, as I suspected, with the ring held in place by the groove in which the satellite rollers run within the unit. However, the problem is that on three of the rollers, the plastic lug around which they spin has broken off from the body. And there is also a roller missing. The toothed belt is also worn out and shredded, as I suspected. I am wondering whether it would be possible to repair the broken lugs locally by drilling in through the back of the unit and bolting a new lug (one made to fit) through from the back, plus I could get another roller made out of nylon, I think, - the local lathe operators in Brazil are quite resourceful. THe problem will be the toothed belt, as to find one in the local market will be very difficult if not impossible.

Any thoughts?

Thanks

Ashley
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post #25 of 48 Old 10-21-2012
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Re: Autohelm ST4000 Plus problems

The belts are available on Ebay. Search ebay for " autohelm belt".

The part number is D169.
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post #26 of 48 Old 11-10-2012
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Re: Autohelm ST4000 Plus problems

Hi Captain Dan,

Access to sailnet appears to have been blocked here in Brazil over the last month...God knows why. Did you ever reply to my last post? I have come to the conclusion that I can repair the broken rollers by fixng bolts through the back of the plastic ring and make a new roller out of nylon....but the problem is finding a new toothed belt...do you have any for sale?

Thanks, Ashley

ashley dot huggins at terra dot com dot br
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post #27 of 48 Old 11-10-2012
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Re: Autohelm ST4000 Plus problems

I have belts and pinion gears, but I am sailing in MX.

Try EBay, search "autohelm belt"
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post #28 of 48 Old 11-14-2012
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Re: Autohelm ST4000 Plus problems

What about pinion gears for the RS-555SH Motor in the tiller drive?
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post #29 of 48 Old 11-14-2012
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Re: Autohelm ST4000 Plus problems

What model tiller?
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post #30 of 48 Old 11-14-2012
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Re: Autohelm ST4000 Plus problems

The gear (14 teeth) that presses on the Q114 Motor spindle of the Z327 Tiller Autopilot in the ST4000+ system.

I have the old gear from the old motor + a new Mabuchi RS-555SH motor. However, the old gear appears worn and freely spins on the shaft of the new motor. I'm looking into possible new gear sources before trying to fix the old gear to the new motor and possibly ruin both.

Raymarine Dealer quotes Q114 motor for about $100.00. I've heard that it's possible that newer Q114 parts come with 19T gear instead of 14T. Dealer wasn't able to confirm which. In any case, for that price I will junk the ST4000+ and look into a new ST2000.

Some of the RC model gears look like promising substitutes and inexpensive enough to experiment with. The gear appears to be similiar to 3.17 mm shaft, 0.5 Modulus, 14T brass. But do you have access to the correct gear?

Thanks.
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