Today's Message Index:
----------------------
1. 06:43 AM - Re: Alternator Belt (Jim Combs)
2. 06:56 AM - Re: Alternator Belt (Linn Walters)
3. 02:48 PM - Re: Alternator Belt (Bob Turner)
4. 05:40 PM - Alternator Belt (Karol Hansen)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Alternator Belt |
Make sure you check the alignment of the alternator and the flywheel
pulleys. There have been instances where the spacers provided with the
alternator place the alternator pulley forward or aft of the correct
placement. There are single and dual pulley flywheels and its possible to
have them staggered.
Just check it now before you get to first flight.
I have personally seen two instances where the pulleys were not aligned.
Jim Combs
N312F - Flying (540+ Hours)
On Sun, Aug 18, 2013 at 9:41 PM, Karol Hansen <karolamy@roadrunner.com>wrot
e:
>
>
> Just wanted to share the following with all regarding alternator belt
> findings: Using Vans supplied Plane Power Alternator, and Vans supplied
> I0-540 Engine with an LW 12227 double pulley flywheel, my findings are th
at
> a Gates XL 7325 is the belt of choice. The Alternator came in a fairly
> recently purchased FF kit (few months ago) and the Install Instructions
> say: "For 7 1/2 inch ring gear support pulley locally purchase XL7300
> Gates (not supplied)". A Dayco 15355 (Gates XL 7355) does come with the
> kit but it is way too long and meant for a 9-3/4 inch ring gear support
> pulley.
>
> After some web searching on VAF I found that this discussion had been bee
n
> covered not too awful long ago with the conclusion being that a Gates
> XL7328 was the belt of choice. I bought both a 7328 and a 7320 (only 3/4
> inch difference in total length) and tried them both. First tried the 73
20
> which is 32 5/8 inch. No matter which way you held your jaw it wasn't
> going to go on - not without hurting something! The 7328 (33 3/8 inch) d
id
> go on but I found that I could tighten it all the way to maximum travel o
n
> the V-1004 arm and still rotate the pulley too easily without the
> engine/flywheel turning. That's for a new belt. Once broken in and the
> belt has stretched, it would be out of capable travel adjustment range.
> What is the BIG DEAL you say? NOT interested in removing the spinner an
d
> the prop just to install a different belt after one hour of flight is my
> answer. Back to the store, got an XL 7325 and bingo - fits on the flywhe
el
> and alt. with just a bit of difficult!
> y, but once tightened there was still about 1/4 to 3/8 inch travel on th
e
> V-1004 arm for adjustment. Log book size entry time!
>
> For those that are unfamiliar with how to, or how much to tighten the
> belt, PlanePower does include instructions that are good on their website
.
> If I might add a tip that has worked well for me over the last 15 years:
> A new belt is a bit slippery as NEW. This will change over the first fe
w
> hours of operation - the belt will also stretch a bit after these first f
ew
> hours. So, what I like to do for the initial setting is snug the
> alternator down to the point of being able to put a 1/2 inch breaker bar
> with appropriate socket ( 3/4 inch - PlanePower) on the alternator center
> nut and in turning the breaker bar just slightly (10 - 20 degrees) it
> should almost turn the flywheel, hence the engine crank. For now this is
> good enough. Tighten and safety wire. Then after just a couple hours o
f
> flight and the belt is stretched to basically final form and no longer
> slippery, I like to tighten it just enough to perform the same procedure
as
> above but have it actually turn the alt.!
> and crank together, no slipping. No over tightening! Also these rules
> do not apply to an oil or fluid contaminated belt!
>
> If the belt is tightened too much, we will have alternator bearing and/or
> other issues, and if we don't tighten it enough it can slip causing
> premature belt wear and possibly poor to little output at the alternator.
>
> ***When making these adjustments be sure to put a few 1/2 inch
> bolts/washers in the crank to hold the flywheel in place (as in symmetric
al
> with the crank flange) unless of course the prop is already bolted on.
>
> SORRY if this has already been posted somewhere, I couldn't find it and
> thought it might help some of you. It's also during the weekend, so
> PlanePower is closed - they may have already discovered these Gates
> numbers, I'll give them a call tomorrow=85=85 One thing is for sure - th
eir
> recommended Gates XL7300 would not have worked on my set up! The Revisio
ns
> from Plane Power that I have are dated: 8/27/12 - maybe they have an
> updated one.
>
>
> Rich Hansen
> RV-6A sold
> Rv-10 Fitting Cowl, Panel Ordered!
>
===========
===========
===========
===========
>
>
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Alternator Belt |
There are also single belt flywheels that look like they fit two belts
....... they don't.
Linn
On 8/19/2013 9:42 AM, Jim Combs wrote:
> Make sure you check the alignment of the alternator and the flywheel
> pulleys. There have been instances where the spacers provided with
> the alternator place the alternator pulley forward or aft of the
> correct placement. There are single and dual pulley flywheels and its
> possible to have them staggered.
>
> Just check it now before you get to first flight.
>
> I have personally seen two instances where the pulleys were not aligned.
>
> Jim Combs
> N312F - Flying (540+ Hours)
>
>
> On Sun, Aug 18, 2013 at 9:41 PM, Karol Hansen <karolamy@roadrunner.com
> <mailto:karolamy@roadrunner.com>> wrote:
>
> <karolamy@roadrunner.com <mailto:karolamy@roadrunner.com>>
>
>
> Just wanted to share the following with all regarding alternator
> belt findings: Using Vans supplied Plane Power Alternator, and
> Vans supplied I0-540 Engine with an LW 12227 double pulley
> flywheel, my findings are that a Gates XL 7325 is the belt of
> choice. The Alternator came in a fairly recently purchased FF kit
> (few months ago) and the Install Instructions say: "For 7 1/2
> inch ring gear support pulley locally purchase XL7300 Gates (not
> supplied)". A Dayco 15355 (Gates XL 7355) does come with the kit
> but it is way too long and meant for a 9-3/4 inch ring gear
> support pulley.
>
> After some web searching on VAF I found that this discussion had
> been been covered not too awful long ago with the conclusion being
> that a Gates XL7328 was the belt of choice. I bought both a 7328
> and a 7320 (only 3/4 inch difference in total length) and tried
> them both. First tried the 7320 which is 32 5/8 inch. No matter
> which way you held your jaw it wasn't going to go on - not without
> hurting something! The 7328 (33 3/8 inch) did go on but I found
> that I could tighten it all the way to maximum travel on the
> V-1004 arm and still rotate the pulley too easily without the
> engine/flywheel turning. That's for a new belt. Once broken in
> and the belt has stretched, it would be out of capable travel
> adjustment range. What is the BIG DEAL you say? NOT interested
> in removing the spinner and the prop just to install a different
> belt after one hour of flight is my answer. Back to the store,
> got an XL 7325 and bingo - fits on the flywheel and alt. with just
> a bit of difficult!
> y, but once tightened there was still about 1/4 to 3/8 inch
> travel on the V-1004 arm for adjustment. Log book size entry time!
>
> For those that are unfamiliar with how to, or how much to tighten
> the belt, PlanePower does include instructions that are good on
> their website. If I might add a tip that has worked well for me
> over the last 15 years: A new belt is a bit slippery as NEW.
> This will change over the first few hours of operation - the belt
> will also stretch a bit after these first few hours. So, what I
> like to do for the initial setting is snug the alternator down to
> the point of being able to put a 1/2 inch breaker bar with
> appropriate socket ( 3/4 inch - PlanePower) on the alternator
> center nut and in turning the breaker bar just slightly (10 - 20
> degrees) it should almost turn the flywheel, hence the engine
> crank. For now this is good enough. Tighten and safety wire.
> Then after just a couple hours of flight and the belt is
> stretched to basically final form and no longer slippery, I like
> to tighten it just enough to perform the same procedure as above
> but have it actually turn the alt.!
> and crank together, no slipping. No over tightening! Also
> these rules do not apply to an oil or fluid contaminated belt!
>
> If the belt is tightened too much, we will have alternator bearing
> and/or other issues, and if we don't tighten it enough it can slip
> causing premature belt wear and possibly poor to little output at
> the alternator.
>
> ***When making these adjustments be sure to put a few 1/2 inch
> bolts/washers in the crank to hold the flywheel in place (as in
> symmetrical with the crank flange) unless of course the prop is
> already bolted on.
>
> SORRY if this has already been posted somewhere, I couldn't find
> it and thought it might help some of you. It's also during the
> weekend, so PlanePower is closed - they may have already
> discovered these Gates numbers, I'll give them a call tomorrow
> One thing is for sure - their recommended Gates XL7300 would not
> have worked on my set up! The Revisions from Plane Power that I
> have are dated: 8/27/12 - maybe they have an updated one.
>
>
> Rich Hansen
> RV-6A sold
> Rv-10 Fitting Cowl, Panel Ordered!
>
> ==========
> arget="_blank">http://www.matronics.com/Navigator?RV10-List
> ==========
> http://forums.matronics.com
> ==========
> le, List Admin.
> ="_blank">http://www.matronics.com/contribution
> ==========
>
>
> *
>
>
> *
>
> No virus found in this message.
> Checked by AVG - www.avg.com <http://www.avg.com>
>
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: Alternator Belt |
If you want more than 'feel', use a torque wrench instead of the breaker bar.
Plane Power and Lycoming list torque limits.
--------
Bob Turner
RV-10 QB
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=407065#407065
Message 4
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
Correct Bob on torque, and correct Jim on alignment.
FOLLOW-UP:
Did speak to Plane Power today. They were not aware of belt size issues or alignment
issues. They said that they would contact Vans to see what else needs
to be done between the two of them. PP said that they did redesign the u-bracket
and some other things (not too long ago) to accommodate Vans change to the
Lycoming 2 grove pulley that was requested primarily by the Brazil builders.
Regarding alignment: My mounted alt. sits forward approx .125 of where it should
be. After hours of waiting on the phone for Vans, or talking to Plane Power,
I'm tired of waiting so will just shave off .125 of the rear 1001 spacer and
add 2 washers in the front. I'll add the same two washers at the adjustment
bracket.
I also did find today 6 pages on VAF regarding similar issues - (see RV-10 Alternator
Alignment Issues) These seem to have started about Oct. 2011 - it is hard
to believe these issues are still not resolved. Some refer to Vans having
a different install kit with different spacers for $30.00? Of course, no where
to be found on Vans website or parts cat.
Yet one MORE issue is the #7 bolt placement. The Plane Power instructions have
you placing the head of the bolt in from the front. On mine, utilizing the aforementioned
newer style U-bracket, the bolt hits the ring gear and will not
be removable without dropping the bolts that retain the U-bracket, or taking the
prop off - should the Alternator ever need servicing! Neither a great option,
so at this point i will be installing the bolt from the rear, thus placing
the washer and securing nut in the front. Don't have cowl fit yet so don't know
if this will work. Anybody please chime in if they tried this and it did,
or didn't work?
Regarding belt size, I stick to my guns, for my application the 7325 is the ticket..
Will post anything of value other than, " that's the first we've heard of that"
!
Rich
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|