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Date:         Sun, 23 Sep 2012 17:23:56 -0400
Reply-To:     Dennis Haynes <d23haynes57@HOTMAIL.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Dennis Haynes <d23haynes57@HOTMAIL.COM>
Subject:      Re: Alternator continuous-duty rating?-V-belt drive rating.
Comments: To: Rocket J Squirrel <camping.elliott@GMAIL.COM>
In-Reply-To:  <505F56B1.6060607@gmail.com>
Content-Type: text/plain; charset="us-ascii"

Get one of the cheap belt tension spring gauges and a straight edge to measure the deflection. Otherwise, rev the engine and watch the belt. If it oscillates violently it is still too loose. There are other belt alternatives. AFAIK the OEM belt is no longer available from the dealer.

Dennis

-----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Rocket J Squirrel Sent: Sunday, September 23, 2012 2:37 PM To: vanagon@GERRY.VANAGON.COM Subject: Re: Alternator continuous-duty rating?-V-belt drive rating.

David Beierl asks, "Big heavy iron thing, right? V timing notch on the first land and round one on the second."

Yep yep yep. That's the one.

So what we got here then is the later style 1.9 set up for the 90A alternator with the three-groove crank pulley.

Dennis writes, "The water boxer engine cannot reliably drive a larger alternator due to the drive belt set. Most belt drives are designed around the belt having a 180 degree wrap around the drive and driven pulleys. On the waterboxer the belt only skims around the drive pulley limiting the amount of friction available to drive the load. This is why belt tension is so important and from the factory a special high tensile strength belt was used."

and that, "[...] can that belt squeal when it tries to charge those GC-2 [batteries] you plan to install!"

and Tom Hargrave writes to say that, "[...] the air cooled engines were also sensitive to belt quality. So sensitive that a cheap belt from your local McParts store would typically last 4 weeks."

Presently running a 7430 Gates XL belt. Can I do better in terms of maximizing grippage and reducing slippage?

-- Jack "Rocket j Squirrel" Elliott 1984 Westfalia, auto trans, Bend, Ore.

On 09/23/2012 11:06 AM, David Beierl wrote: > At 12:50 PM 9/23/2012, Rocket J Squirrel wrote: >> Who sells such things? > > Scott Daniel, junkyard, Samba. > >> Um, this engine has a crank pulley with three separate grooves, each >> smaller than the one in front of it. Is that what is being described >> here? > > Big heavy iron thing, right? V timing notch on the first land and > round one on the second. The rust on the unused grooves makes them look smaller. > > Yrs, > d


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