Astorino rear shock fluid capacity

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Jim Carey

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Sep 22, 2021, 1:03:57 PM9/22/21
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Looking for the fluid type and volume for refilling 1948 Airone (Astorino) rear hydraulic shock absorbers,

Thanks in advance

Jim Carey

Dave Knaack

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Sep 22, 2021, 1:09:40 PM9/22/21
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Most of the early singles used auto trans fluid. I’m not sure on capacity 

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On Sep 22, 2021, at 12:04 PM, Jim Carey <jca...@br2architecture.com> wrote:

Looking for the fluid type and volume for refilling 1948 Airone (Astorino) rear hydraulic shock absorbers,

Thanks in advance

Jim Carey

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Mac Dennis

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Sep 22, 2021, 2:34:41 PM9/22/21
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Automatic  transmissions in ‘48? Most references I’ve read calls for 20wt or 30wt motor oil.
Climate, weight, type of road surface should be considered.
I would think modern fork oil will work well.

Mac

pouma1954

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Sep 22, 2021, 2:57:28 PM9/22/21
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No automatics in 48 Italy but it can be used.
Paul



Envoyé depuis mon appareil Galaxy


-------- Message d'origine --------
De : Mac Dennis <capr...@fastmail.fm>
Date : 22/09/2021 20:34 (GMT+01:00)
À : Guzzi Singles <guzzi-...@googlegroups.com>
Objet : Re: [guzzi-singles] Astorino rear shock fluid capacity

Jim Carey

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Sep 22, 2021, 3:01:10 PM9/22/21
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CAPACITY???

Dave Knaack

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Sep 22, 2021, 3:06:53 PM9/22/21
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The auto trans fluid is more of a hydraulic fluid with high detergent to keep things clean ……
It’s recommended for the Nuovo Falcone and I’m using it in all the early forks that use a fluid. Been working well. If I were to use a true fork oil I’m sure it would work fine but I think I’d use something on the thicker side, not a 5 or 10 wt ????
Just my 2 pennies 

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On Sep 22, 2021, at 2:01 PM, Jim Carey <jca...@br2architecture.com> wrote:

CAPACITY???

Jim Carey

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Sep 22, 2021, 4:30:02 PM9/22/21
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I figured out the capacity, stand the shock up in a vice, remove top cap and pull out the plunger, remove the drain plug, fill shock until oil seeps out the drain plug, insert the plunger assy, push the shock shaft down, catch oil out of weep hole, draw plunger back up, insert drain plug. I am going to use straight 30W oil and see how that works.

John O Regan

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Sep 22, 2021, 4:32:48 PM9/22/21
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Hi Jim,
Do you have the Astorino Manual ? It is or was available to download as a PDF ?? I cannot remember where now though?? This old tractor site maybe ?
Anyhow the screw on the side is a level screw, but I cannot see if the damper is extended or compressed position
when checking the level? The manual says to fit the internal cylinder and then fill oil to the level plug,,

John

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Jim Carey

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Sep 22, 2021, 4:45:03 PM9/22/21
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Hi John

I translated the Airone manual to English and put in on This Old Tractor. I was just looking for note of a volume and had not read to just fill and depress the plunger. That makes sense now as the depressed plunger leaves the max cavity for fluid. 

Thanks 
Jim


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Subject: Re: [guzzi-singles] Astorino rear shock fluid capacity
 
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Mac Dennis

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Sep 22, 2021, 7:19:16 PM9/22/21
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 You will know if you have too little oil when the rod is pulled to the top and hit an air pocket.

Mac

John O Regan

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Sep 22, 2021, 7:40:40 PM9/22/21
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Hi Jim,
Apologies for  forgetting the work you put into translating the manual (s)
I had the Astorino manual downloaded but cannot remember where from

John

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Mac Dennis

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Sep 22, 2021, 7:42:15 PM9/22/21
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If you are looking for an official Astorino manual I doubt you will find one. According to Mario Colombo’s book on Moto Guzzi there is no such model. I believe it’s a nickname for an Airone, like Guzzino, which is a nickname for a Motoleggera or Cardellino, meaning small Guzzi.
Small Astore?

Mac

Jim Carey

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Sep 22, 2021, 7:46:29 PM9/22/21
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Astorino 
is the nick name for the early postwar Airone that used the rear shock (dampers) like the Astore, I think up to 1949? I have translated the  early Airone manual but I still need to translate the 1948 owners manual, it has some good general info. 

Thanks 
Jim Carey 

From: guzzi-...@googlegroups.com <guzzi-...@googlegroups.com> on behalf of Mac Dennis <capr...@fastmail.fm>
Sent: Wednesday, September 22, 2021 5:41:50 PM
To: Guzzi Singles <guzzi-...@googlegroups.com>
Subject: Re: [guzzi-singles] Astorino rear shock fluid capacity
 

Jim Carey

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Sep 22, 2021, 10:24:14 PM9/22/21
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My Airone restoration posted here:

https://wildguzzi.com/forum/index.php?topic=108253.0

Mac Dennis

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Sep 23, 2021, 3:33:39 PM9/23/21
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Yes it can and it was the standard in the 60s and 70s but do keep in mind that not all ATF is the same and there is
no weight rating for it. I’ve read that even fork oil can vary in weight from different manufacturers so it’s best to sick
to the same brand when dialing in your suspension.

Mac

Michael Blumberg

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Sep 23, 2021, 4:43:48 PM9/23/21
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To all

I am following this with great interest as I have a 1948 Astorino 

Mine is running again after a 4 year hiatus thanks to the efforts of Alan in Robert’s Creek 

Photo below (that’s Alan there…)

Michael in Vancouver 



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On Sep 23, 2021, at 12:33 PM, Mac Dennis <capr...@fastmail.fm> wrote:


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