Serpentine Belts

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dunsbr
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Serpentine Belts

Post by dunsbr » Wed Jan 07, 2009 4:45 am

Does anyone know the differences between the earlier and later HMMWV serpentine belts?
I'm guessing there must be a difference in lengths.

Two different belts are:

3030-01-488-5606 0AKY3 20-9646 BELT,SERPENTINE SERIAL NUMBER
196901 AND ABOVE.
3030-01-466-9476 0AKY3 20-8021 BELT,V ALL WEATHER SERIAL NUMBER 196900 AND BELOW.

The belt I got off Paul Moeller as an A2 belt is a Dayco belt with details: OAKY3 20-6612 BELT,V RCSK17561 and appears to be a little too short.

Cheers
Brad Dunstan
RHD '87 M1026
(with 4L80E Trans, 242 T/case, 12K hubs, CTIS, A2 wiring, Air Con, A2 ebrake, 9k Winch,
Serpentine Belt Accessory Drive & Eaton e-lockers)


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Post by Ted Gates » Wed Jan 07, 2009 6:07 am

Hi Brad,

I posted this a while back here on the g503. There is two different lengths. Let me look up the post and move it forward.

Ted

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Post by Ted Gates » Wed Jan 07, 2009 6:11 am

belt sourced for the remote power steering reservoir setup:

NSN 3030-01-488-5606 AMG#1246 9149-3 it is 29-12/25milimeters wide, 8 groove, 112.2" long! (gotta like imperial-metric combos!)

The other A2 belt is AMG#1246 9149-1 is only around 99" long!


Ted

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Post by dunsbr » Thu Jan 08, 2009 4:36 am

Well I spent an interesting morning with the Managing Director of Dayco Australia today... :D

He was very interested in the Humvee and happy to help with belt selection.

After some too and fro-ing we found that a 100" belt is the ideal.
(Though a 99" may be OK too)
Civvy part numbers are 8PK2540 for the 100" and 8PK2515 for the 99"

The original A2 belt was around 97" long.

With the 100" belt, the tensioner is sitting like this:

Image

As you can see the tensioner is sitting right in the middle of its adjustment range.

This pic shows the intall before I made up a mount bracket for the second back idler on the top (my phone went flat so I couldn't take a pic of that install :roll: )
Image

Here's a pic from the other angle:
Image

You can see that the second idler is essential to clear the radiator hose! :shock:

Cheers
Brad Dunstan
RHD '87 M1026
(with 4L80E Trans, 242 T/case, 12K hubs, CTIS, A2 wiring, Air Con, A2 ebrake, 9k Winch,
Serpentine Belt Accessory Drive & Eaton e-lockers)

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Post by STUDENT-DRIVER » Thu Jan 08, 2009 6:59 am

Here Brad is mine setup okay with out the ac compressor maybe it helps

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Image

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Post by STUDENT-DRIVER » Thu Jan 08, 2009 9:41 am

prad could you please mesure the diameter from the engine pully?
Looks larger than mine.
Thanks
Alex
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serpentine belts

Post by dilvoy » Thu Jan 08, 2009 10:59 am

Hey Alex, It looks like you have a mix of brackets there. The right hand bracket is an early type and the left hand bracket that is holding the Alt is the late type that positions the Alt farther away from the engine to allow for a pulley between the Alt and Power Steering Pump to allow for more belt wrap. Have you had any problems with slippage of the Power Steering Pulley during driving on or offroad? I'm shure that Brad would be interested in your answer as well as I.
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Post by STUDENT-DRIVER » Thu Jan 08, 2009 11:45 am

No No :lol:
I just killed the 200 AMP alternator in the stream and I could not get a new one so I had to fit the 100 AMP in that bracket and that's why the tensenor was not applied now everything is back to normal :_D
I have two 100 AMP in spare but until now no brackets but I just ordered two few days ago. So the the next time I kill the 200 I can mount the 100 as it used to be. 8)


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Post by dilvoy » Thu Jan 08, 2009 6:45 pm

Thanks for letting me know that Alex. I have been worried about belt jumpimg problems.
George D. Paxinos

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Post by dunsbr » Fri Jan 09, 2009 3:09 am

I think I've finished the Serpentine install now...

Here's a few pics:
This first one shows the complete set up including the new bracket for the second back idler.
Image

Her's a view of the rear of the new bracket showing the spacer tubes and the gusset from the idler back down to the botom spacer tube.
Image
(One of the advantages of this setup is that you can now actually see the power steering reservoir cap!! :D )

Here's pics of the components that make up the new second idler bracket.
Image
Image

Here's the set up with the fan installed.
Image

Dilvoy, is your fan this close to the A/C compressor clutch?
Image

I realise that the A/C clutch and the fan are rigidly fixed to the engine, but it is pretty darn close! :roll:

Cheers
Brad Dunstan
RHD '87 M1026
(with 4L80E Trans, 242 T/case, 12K hubs, CTIS, A2 wiring, Air Con, A2 ebrake, 9k Winch,
Serpentine Belt Accessory Drive & Eaton e-lockers)

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Post by dunsbr » Fri Jan 09, 2009 3:11 am

STUDENT-DRIVER wrote:prad could you please mesure the diameter from the engine pully?
Looks larger than mine.
Thanks
Alex
Hi Alex,

my crankshaft pulley is 199mm across the diameter with the belt installed.

Cheers
Brad Dunstan
RHD '87 M1026
(with 4L80E Trans, 242 T/case, 12K hubs, CTIS, A2 wiring, Air Con, A2 ebrake, 9k Winch,
Serpentine Belt Accessory Drive & Eaton e-lockers)

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Post by dunsbr » Fri Jan 09, 2009 3:35 am

Alex,

I notice you have tape on your upper radiator hose.
Is that to protect it from being hit by the serpentine belt?

I didn't think they slapped that much.

Cheers
Brad Dunstan
RHD '87 M1026
(with 4L80E Trans, 242 T/case, 12K hubs, CTIS, A2 wiring, Air Con, A2 ebrake, 9k Winch,
Serpentine Belt Accessory Drive & Eaton e-lockers)

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Post by STUDENT-DRIVER » Fri Jan 09, 2009 4:51 am

No taht was also depending on the 100 AMP alternator. At the begin I mounted the alternater on the upper bracket arm and that was to close and hit the hose...
I'll messure the diameter tonight...
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Post by STUDENT-DRIVER » Fri Jan 09, 2009 6:17 am

Okay mine has the same size :D
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serpentine belts

Post by dilvoy » Fri Jan 09, 2009 9:25 pm

Hey Brad, I can't access my email from my home computer, because it had a problem with the hard drive and I haven't sorted everything out yet, so I'm contacting you here through the G.
I found that stud that will allow you to keep the upper part of the heavy Alternator, Power Steering Pump and associated Bracket still attached to the Head, if there were any need to swap out the pulley bracket that you are building. The stud if used with a normal washer, will have a full seven threads into the head and has the hex nut in the center for tightening. Then there are ten threads of stud sticking out for your bracket leg to attach too. This is only on the furthest mounting hole on the Alt Bracket towards the center of the engine. The casting of the bracket gets too thick at the location of the other hole, but I think that this will do the trick. I can send you a couple of these studs for no charge, but you pay for the shipping. I think I can arrange very quick shipping via Perth for approx $10,000. What do you say? :D
George D. Paxinos

M998
M1123A2


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