Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 05-08-2009, 14:07   #1
Registered User
 
Amwasp's Avatar

Join Date: May 2008
Location: Charleston, SC
Boat: Beneteau Idylle 13.5 - Be Leaving
Posts: 25
Alternator Tach Signal

Hi,
My VDO tach hasn't been the same since I had the alternator (Baldmar 7 series) rebuilt. When the alternator went it may have fried the tach but I didn't think so because the electronics work even though the analog dial does not.
When I crank the engine, the dial goes from 0 to top of range as it performs it's auto test. But after the test, the dial does not move from zero. I pulled all my manuals and everything on the web I could find but found no reference to the issue. I e-mailed the tech department at the company that bought VDO from Seimens but they were not responsive. I checked the continuity from the alternator pickup wire to the tach and it's good. I tried making the adjustments to adjust the tach by inputting the pulse rates and the system took the numbers OK, but the dial still reads zero.
Finally, the question...is there a way to test the alternator at the AC Tap to be sure that it is sending properly?
Thanks
__________________

__________________
So convenient a thing it is to be a reasonable creature, since it enables one to find or make a reason for everything one has a mind to do. B. Franklin
Amwasp is offline   Reply With Quote
Old 05-08-2009, 16:12   #2
Senior Cruiser

Cruisers Forum Supporter

Join Date: Mar 2007
Location: Santa Cruz
Boat: Boatless Again
Posts: 4,321
Best to use a scope, but you should be able to put a multimeter between ground and the tach output of the alternator and read something on the order of 10 volts on the AC volts scale.
__________________

__________________
donradcliffe is offline   Reply With Quote
Old 05-08-2009, 17:17   #3
Registered User
 
windsaloft's Avatar

Join Date: Apr 2008
Location: SF Bay area at present
Boat: Mason 33 and a Nordic Folkboat (wooden)
Posts: 172
I actually found that calling Balmar helped me the most when we ended up having to deal with alt/tach issues.
__________________
When is the last time you tried something for the first time?
windsaloft is offline   Reply With Quote
Old 05-08-2009, 19:45   #4
Moderator Emeritus
 
David M's Avatar

Cruisers Forum Supporter

Join Date: Sep 2007
Location: San Francisco Bay
Boat: research vessel
Posts: 10,150
I second that concerning Balmar tech support.
__________________
David

Life begins where land ends.
David M is offline   Reply With Quote
Reply

Tags
alternator

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
Aqua Signal Parts Jmolan Electrical: Batteries, Generators & Solar 2 12-11-2008 07:42
Yanmar 2GM20F tach Glenn Whaley Engines and Propulsion Systems 4 12-07-2008 04:47
Yanmar intermitant tach and instruments Celestialsailor Engines and Propulsion Systems 6 24-07-2007 20:50
Tach slow/alternator not producing starfish62 Engines and Propulsion Systems 15 28-05-2007 16:04
Anyone know about debugging a flaky tach? Paul L Engines and Propulsion Systems 2 31-07-2005 06:15



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 20:11.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.