Cruisers Forum

Join CruisersForum Today

Thread Tools Rate Thread Display Modes
Old 01-08-2015, 06:11   #1
Registered User
jr_spyder's Avatar

Join Date: Aug 2011
Location: Boston area
Boat: Little Harbor 46 (1988)
Posts: 187
Bad noise from autopilot pump motor

I hate to admit it but it I haven't been paying enough attention to the mechanical side of my autopilot system (idiot) and now it's giving me trouble. The electronics are fine. I have a Simrad RPU300 reversible hydraulic pump and a large brass Hynuatic ram of unknown model number.

I did the Marion to Bermuda race in June which was a total of 1400 miles of mostly very rough seas. So the AP was tortured with heavy usage. The sound of the mechanics changed over time which I knew was a warning sign but there were too many other things to worry about, and somehow I didn't attend to it. I've never had to touch this system in the 4 years I've had this boat, but never used it so much either. I'm kicking myself for this now, as I know better.

Yesterday I started an 18 day cruise to Maine and the AP stopped actuating the ram not far from home. I discovered the system was very low on fluid so topped it up in the expansion reservoir and did the purging as directed. This seems to get it all working again but still with a wrong noise. At first I thought it was because of low oil in the ram and I was hearing friction, but now I'm quite sure the noise is either in the motor itself or in the valve on top of the motor. Hard to tell exactly which. Either way I'd love to here some advice on what to look for and what to do. If I have to replace the whole thing that's fine, but have to figure out how to get one somewhere on my voyage in Maine.

Experience? Thoughts?



Sent from my iPad using Cruisers Sailing Forum
jr_spyder is offline   Reply With Quote
Old 01-08-2015, 19:05   #2
Senior Cruiser
DeepFrz's Avatar

Cruisers Forum Supporter

Join Date: Mar 2006
Location: Winnipeg
Boat: None at this time
Posts: 7,047
Re: Bad noise from autopilot pump motor

There was a very recent thread where a member rebuilt his motor and pump. May be a different motor but should give you some idea.
Raymarine autohelm type 1 hydraulic pump/drive repair

Also for the pump
Raymainre Autopilot Pump Rebuild
I hope it helps.
The Blue Dot Campaign. This Changes Everything.
DeepFrz is offline   Reply With Quote

autopilot, motor, noise

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not 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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
autopilot hydraulic linear drive noise Capn C Marine Electronics 8 30-04-2015 05:29
Fresh water pump noise Tristan Plumbing Systems and Fixtures 17 09-05-2012 16:59
Random Noise from Water Pump nknowland Plumbing Systems and Fixtures 11 29-03-2010 18:29
Grinding Motor Noise - New Info.... makolab Engines and Propulsion Systems 1 18-02-2010 16:24
Home Depot Plumbing fittings - just bad or really bad? neelie Plumbing Systems and Fixtures 34 11-11-2008 17:21

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities

Copyright 2002-2015 Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 22:43.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2016, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.