Autopilot ST4000 - SailNet Community
Reply
 
LinkBack Thread Tools
post #1 of 20 Old 09-08-2009 Thread Starter
Member
 
Join Date: May 2007
Location: Seattle
Posts: 97
Thanks: 5
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Autopilot ST4000

Hello-

I'm hoping someone can comment on this problem. I have an old Autohelm ST4000 wheel pilot. Other than the compas being off a few degrees, for the most part it works fine. I have an annoying issue when the A/P is disengaged. When I steer, the belt inside the housing feels like it never really disengages. That is, it hangs up on the drive gear and "chatters" as I turn the wheel. I have taken the unit apart and cleaned and lubed everything that could be cleaned and lubed.

Has anyone else experienced this? Are there any suggestions as to a remedy.

Thanks
Doug
S/V Totoro, C&C 30 MkII
hangupndrive is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 20 Old 09-08-2009
Special Delivery
 
speciald's Avatar
 
Join Date: Mar 2007
Location: live on boat
Posts: 661
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Send a message via Skype™ to speciald
Yes I had the same problem years ago. The problem was wear in the wheel unit. Unfortunately, it had to be replaced to cure the problem.
speciald is offline  
Quote Quick Reply Share with Facebook
post #3 of 20 Old 09-08-2009
Senior Member
 
Join Date: Mar 2006
Location: VA
Posts: 2,046
Thanks: 1
Thanked 4 Times in 4 Posts
Rep Power: 10
 
Not to hijack the thread but my Autohelm Wheelpilot 4000 seems to have gotten "water on the brain" after we were caught in a torrential downpour.

I assume the control unit (a black box that hangs on a fitting in the cockpit) got water in it and the unit now just alarms and sends chattering commands to the wheel. It does not respond to pushing the standby button.

Are there any user tricks that I could try? When it was working it was a great help even though its not a great autopilot its way better than no autopilot.

Thanks

PalmettoSailor
s/v Palmetto Moon
1991 Catalina 36
PalmettoSailor is offline  
Quote Quick Reply Share with Facebook
post #4 of 20 Old 09-08-2009
Just another Moderator
 
Faster's Avatar
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 16,340
Thanks: 101
Thanked 303 Times in 293 Posts
Rep Power: 10
     
Quote:
Originally Posted by hangupndrive View Post
Hello-

I'm hoping someone can comment on this problem. I have an old Autohelm ST4000 wheel pilot. Other than the compas being off a few degrees, for the most part it works fine. I have an annoying issue when the A/P is disengaged. When I steer, the belt inside the housing feels like it never really disengages. That is, it hangs up on the drive gear and "chatters" as I turn the wheel. I have taken the unit apart and cleaned and lubed everything that could be cleaned and lubed.

Has anyone else experienced this? Are there any suggestions as to a remedy.

Thanks
Doug
S/V Totoro, C&C 30 MkII
In all likelihood one or some of the plastic guide wheels inside has snapped off and is floating around interfering with your steering... bad news is that there's no support for these old drive units, and in any case the plastic studs are broken off the ring casting.

The good news is that the new version (grey) is a much more robust bit of engineering and the same problem is not likely to occur... the new drive rings are available separately, and may work with the old unit... but check with Raymarine first!

Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Faster is offline  
Quote Quick Reply Share with Facebook
post #5 of 20 Old 09-08-2009 Thread Starter
Member
 
Join Date: May 2007
Location: Seattle
Posts: 97
Thanks: 5
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Thanks for the replies. The guide wheels inside the housing are all intact and appropriately lubed. The belt was replaced 2 yrs ago. There are not many moving parts to wear out. It may just be an inherent design flaw.

I am very tempted to modernize with the new Raymaine and throw this one on e-bay.
hangupndrive is offline  
Quote Quick Reply Share with Facebook
post #6 of 20 Old 09-08-2009
Just another Moderator
 
Faster's Avatar
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 16,340
Thanks: 101
Thanked 303 Times in 293 Posts
Rep Power: 10
     
Have you had the drive unit off the wheel at all??? Another possibility, since all internal parts are intact and in good shape, is that it's slightly off center on the wheel, causing things to bind now and then....

Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Faster is offline  
Quote Quick Reply Share with Facebook
post #7 of 20 Old 09-08-2009 Thread Starter
Member
 
Join Date: May 2007
Location: Seattle
Posts: 97
Thanks: 5
Thanked 0 Times in 0 Posts
Rep Power: 9
 
yes, I have had it off. all looks fine. I also took 400 grit sand paper and lightly sanded the surface where the belt comes in contact when the cam is engaged. I guess alignment could be it. I'll tinker with it a bit. That's a good suggestion.

btw, i see you're in BC. We had a great cruise in the gulf islands this summer.
hangupndrive is offline  
Quote Quick Reply Share with Facebook
post #8 of 20 Old 09-08-2009
HANUMAN
 
RobGallagher's Avatar
 
Join Date: Aug 2001
Location: Noank, Connecticut, USA
Posts: 1,463
Thanks: 7
Thanked 22 Times in 21 Posts
Rep Power: 14
 
Had the same problem a few years ago. Sent it back to raymarine twice and they charged me but it never worked correctly. try taking the weight off the motor and see if it still sticks. I Ended purchasing a new drive unit and ot worked fine with the old control unit. Probem solved but not cheap.
RobGallagher is offline  
Quote Quick Reply Share with Facebook
post #9 of 20 Old 09-08-2009
Just another Moderator
 
Faster's Avatar
 
Join Date: Sep 2005
Location: New Westminster, BC
Posts: 16,340
Thanks: 101
Thanked 303 Times in 293 Posts
Rep Power: 10
     
Quote:
Originally Posted by hangupndrive View Post
....btw, i see you're in BC. We had a great cruise in the gulf islands this summer.
Yes, we had a pretty terrific summer... paid for it a bit this past weekend!

Ron

1984 Fast/Nicholson 345 "FastForward"

".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)
Faster is offline  
Quote Quick Reply Share with Facebook
post #10 of 20 Old 09-09-2009
Senior Member
 
Join Date: Nov 2002
Posts: 146
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 13
 
Must be a rash of ST4000 issues this time of year

Mine started to be have the same way. The two shell parts don't seem to be very tight together. I took it apart and also don't see any problems with the rollers or the belt. Will replacing either/both possibly solve it?

I was on hold for the max 20 minutes with Raymarine and shuttled to "leave a message and we will call you back by the end of the day". Yeah, right. I am ready to be pleasantly surprised.
ereiss is offline  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.


User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Fine-Tuning the Autopilot, Part Two Dan Neri Gear and Maintenance Articles 0 10-13-2003 08:00 PM
Autopilot Overview Tom Wood Gear and Maintenance Articles 0 03-22-2002 07:00 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome