‘48 Panhead Inner Primary Assembly

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Motocooney
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‘48 Panhead Inner Primary Assembly

#1

Post by Motocooney » Sun Dec 02, 2018 9:49 pm

Hey guys. I’m getting ready to re-assemble the inner primary, clutch, primary chain, etc.

What is this metal plate for? It seems to go between the inner primary and engine? It fits over the cork seal.

It doesnt make sense to go on the primary.
When I took it apart originally, there was no lock washer.
And the metal plate was on the front side of the primary.


With the lock washer, how do I orient the tabs?

I have two manuals and neither specifies.

Thx!
-Chris
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Motocooney
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Re: ‘48 Panhead Inner Primary Assembly

#2

Post by Motocooney » Sun Dec 02, 2018 10:11 pm

Pic
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Re: ‘48 Panhead Inner Primary Assembly

#3

Post by awander » Sun Dec 02, 2018 10:23 pm

That is a reinforcing ring; it is meant to go inside the primary case, and to support the inner primary, which often cracks where the 3 bolts hold it to the engine case.

Sounds like it was installed correctly when you took it apart-it does not go between the engine and the primary.

You may need to pre-bend the locktab ring in order to install it with the reinforcing ring.

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Re: ‘48 Panhead Inner Primary Assembly

#4

Post by Motocooney » Sun Dec 02, 2018 10:51 pm

awander wrote:
Sun Dec 02, 2018 10:23 pm
That is a reinforcing ring; it is meant to go inside the primary case, and to support the inner primary, which often cracks where the 3 bolts hold it to the engine case.

Sounds like it was installed correctly when you took it apart-it does not go between the engine and the primary.

You may need to pre-bend the locktab ring in order to install it with the reinforcing ring.
Fantastic thank you!

So....nothing else between primary and engine except for the cork seal that is already there?

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Re: ‘48 Panhead Inner Primary Assembly

#5

Post by Motocooney » Sun Dec 02, 2018 11:46 pm

Okay. I can’t find the torque value for these 3 bolts.

After torquing, just bend a tab up to the nut, correct?

I’m not sure what you meant about pre-bending the lockwasher ring
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Re: ‘48 Panhead Inner Primary Assembly

#6

Post by RUBONE » Mon Dec 03, 2018 12:21 am

Okay. I can’t find the torque value for these 3 bolts.

After torquing, just bend a tab up to the nut, correct?

I’m not sure what you meant about pre-bending the lockwasher ring
H-D never published torque values in those days, use standard specs for coarse (USS) thread in aluminum. A standard grade 5 bolt is 13 ft/lb. You should start with a bit less unless your case threads are perfect.

Bend up whichever tab aligns best with a flat.

He means slightly bend up the tab tips so that they are accessible when installed. Those appear to have a slight bend in them from new, not all did.

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Re: ‘48 Panhead Inner Primary Assembly

#7

Post by RooDog » Mon Dec 03, 2018 5:58 am

I had to weld flat washers to the back side of my inner primary where it sets against the engine case bolt holes to get everything to space out correctly. Aftermarket inner.....
RooDog

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Re: ‘48 Panhead Inner Primary Assembly

#8

Post by RooDog » Mon Dec 03, 2018 6:08 am

DSC02460 (2).JPG
Welded on Flat Washer Spacers.
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Re: ‘48 Panhead Inner Primary Assembly

#9

Post by Gotnoclass » Mon Dec 03, 2018 6:26 am

RooDog wrote:
Mon Dec 03, 2018 6:08 am
DSC02460 (2).JPG
Won’t these washers interfere with primary to case fitment?

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Re: ‘48 Panhead Inner Primary Assembly

#10

Post by RooDog » Mon Dec 03, 2018 6:59 am

No. The recessed area of this aftermarket primary was not stamped correctly. The washers worked or else I would not have used them. I did grind the welds slush. It is what was required to stop the bolts from sucking in, dishing,
DSC02178.JPG
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the reinforcement ring and lock ring. Now everything fits flat.
RooDog

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Re: ‘48 Panhead Inner Primary Assembly

#11

Post by Motocooney » Mon Dec 03, 2018 11:46 am

RooDog wrote:
Mon Dec 03, 2018 6:59 am
No. The recessed area of this aftermarket primary was not stamped correctly. The washers worked or else I would not have used them. I did grind the welds slush. It is what was required to stop the bolts from sucking in, dishing,DSC02178.JPG the reinforcement ring and lock ring. Now everything fits flat.
RooDog
Good call man! I was wondering if I could space the backside. The bolts seems to suck everything in. Not sitting flat at all. Also, the inner is rubbing against ratchet on the trans. Spacing should help.

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Re: ‘48 Panhead Inner Primary Assembly

#12

Post by RooDog » Mon Dec 03, 2018 4:29 pm

Custom parts: Pronounced "Cust 'Em"
I also had to reposition the upper rear inner cover where it joins the oil tank tab and the rear chain guard to get everything fitting without being in a bind. This build is a resto-mod, so I am not concerned with accuracy,but rather mechanical correctness....
RooDog

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Re: ‘48 Panhead Inner Primary Assembly

#13

Post by Motocooney » Mon Dec 03, 2018 8:46 pm

RooDog wrote:
Mon Dec 03, 2018 4:29 pm
Custom parts: Pronounced "Cust 'Em"
I also had to reposition the upper rear inner cover where it joins the oil tank tab and the rear chain guard to get everything fitting without being in a bind. This build is a resto-mod, so I am not concerned with accuracy,but rather mechanical correctness....
RooDog
I’m seeing a 3 hole fiber gasket that goes between the inner cover and the engine?
In addition to the cork seal that’s on there.

If I space with washers, this gasket seems kinda useless right?

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Re: ‘48 Panhead Inner Primary Assembly

#14

Post by RooDog » Mon Dec 03, 2018 10:16 pm

I’m seeing a 3 hole fiber gasket that goes between the inner cover and the engine?
In addition to the cork seal that’s on there.

If I space with washers, this gasket seems kinda useless right?
[/quote]

I have no idea what you are refering to as "the 3 hole fiber gasket". I am running a SuperMax belt drive and no gaskets between the inner pri and the engine. The only gaskets I am using art the corks for the outer primary to hold down vibration and keep the covers snug. The outer primary cover is Swiss cheesed for ventilation....
RooDog
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Re: ‘48 Panhead Inner Primary Assembly

#15

Post by Motocooney » Mon Dec 03, 2018 10:50 pm

RooDog wrote:
Mon Dec 03, 2018 10:16 pm
I’m seeing a 3 hole fiber gasket that goes between the inner cover and the engine?
In addition to the cork seal that’s on there.

If I space with washers, this gasket seems kinda useless right?
I have no idea what you are refering to as "the 3 hole fiber gasket". I am running a SuperMax belt drive and no gaskets between the inner pri and the engine. The only gaskets I am using art the corks for the outer primary to hold down vibration and keep the covers snug. The outer primary cover is Swiss cheesed for ventilation....
RooDog
[/quote]

https://rover.ebay.com/rover/0/0/0?mpre ... 3016536471

See it? What’s that for?

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