Community Forums

saddlesore · 11-08-2020, 10:37 AM

Quote:

Originally Posted by Unplanned

You need to find an old time Greyhound mechanic! They would know.

That is also My suggestion.Hmmm how 'bout just posting an "ISO"? ie: In Search OF/for Retired Master Grayhound/Commercial bus mechanic??..

richard5933 · 11-08-2020, 10:41 AM

Bus mechanic, truck mechanic, or anyone who was familiar with heavy equipment engines used through the late 70s.

Shutterstat radiator louver systems were used in trucking as well as industrial applications, like the military bulletin I mentioned earlier. Not sure what happened to the knowledge base, but I'm having trouble tapping into it.

saddlesore · 11-08-2020, 10:53 AM

Made a couple of phone calls...

2 suggestions..
Marvel Mystery oil and as the internals are leather..Neets Foot oil..

richard5933 · 11-08-2020, 01:34 PM

Quote:

Originally Posted by saddlesore

Made a couple of phone calls...

2 suggestions..
Marvel Mystery oil and as the internals are leather..Neets Foot oil..

I see that MMO has an air tool oil, and looking at the SDS it looks like it contains some variety naptha, which I assume is to make it flow better. Might be a winner. I'll track some down and see how it works being pulled through the wick.

Unplanned Tourist · 11-08-2020, 06:32 PM

Have you seen this stuff? #161 Moly Ailrine Oil. 5 gallons might be a bit much though!

https://www.schaefferoil.com/airline-oil.html

richard5933 · 11-10-2020, 03:22 PM

Got some Marvel Mystery Oil Air Tool Oil today - it's now the top contender. It has a very thin consistency, and there is a faint hint of dry cleaning fluid odor mixed into the oil. I am running a test to see how well it wicks. I've got a spare Kysor airline filter/oiler, so if it looks to wick well I will put some of this oil in there and see how much oil gets picked up by the air as it moves through.

Unplanned Tourist · 11-10-2020, 03:41 PM

Sounds good. In the trucks we never had an oiler in line to the shutters. It seemed like the compressors in those days pumped enough oil to keep everything well oiled.

Is that a 6V92? I thought I saw a vib damper. 71's didn't have dampers I thought, but then I only worked on trucks, not buses.

I even got factory trained on 92 overhaul just before they came out.

richard5933 · 11-10-2020, 03:48 PM

Quote:

Originally Posted by Unplanned

...Is that a 6V92? I thought I saw a vib damper. 71's didn't have dampers I thought, but then I only worked on trucks, not buses.

I even got factory trained on 92 overhaul just before they came out.

It's the original 8V71 mated to a Spicer 4-speed. Only about 55,000 original miles on the coach.

Unplanned Tourist · 11-10-2020, 10:34 PM

Wow,that's low miles! Was it converted early in it's life?

I don't think I ever got to work on a Gimmy that clean. You do know they were called "Green Leakers" for a reason. Only ever had one run away on me though.

Got to love the flapper on top of the blower. But that can suck the seals out of the blower.

richard5933 · 11-11-2020, 05:56 AM

Quote:

Originally Posted by Unplanned

Wow,that's low miles! Was it converted early in it's life?

I don't think I ever got to work on a Gimmy that clean. You do know they were called "Green Leakers" for a reason. Only ever had one run away on me though.

Got to love the flapper on top of the blower. But that can suck the seals out of the blower.

It was sent directly from GM in Pontiac MI to Custom Coach in Columbus OH and the conversion was done on a brand new shell. The original owner was Super Service Bus Company, whose owner used it as his family's personal RV for a few years before parking it in their bus barn. I bought is with about 41,000 miles.

True what you say about the flapper having potential to do damage to the blower, but that damage is better than a runaway. I've never had to use the flapper, but did once hit the switch accidentally while in a truck stop trying to get it in reverse. Fortunately the engine was at idle. Created quite the traffic jam till I figured out how to reset it - it happened on my trip home after buying the bus so I had no idea where things were yet.

user113 · 11-22-2020, 09:53 PM

Back to the original question: Judging by what the original can label says, it seems to be a general purpose penetrating oil that was subsequently applied to the company's shutterstat product. I believe a regular penetrating/lubricating type oil like SiliKroil from Kano Labs would work just fine. Of course, a phone call to the company might provide additional insight. (They actually provide a phone number for technical help on their website.)

richard5933 · 11-27-2020, 01:53 PM

Brief project update...

Found some Shutterstat Fluid - sealed can never used. The oil inside seems to be good and not gummed up. I was expecting an odd smell since it has a solvent content, but didn't expect that smell to be mildly similar to the smell of Windex. The closest thing I've found to it so far was Marvel Mystery Pneumatic Tool Oil. I'll run some side-by-side wicking tests to see how they compare.

The airline filter/oiler on my bus has been on there unopened for 46 years. On initial inspection the screws and fittings seem pretty well stuck and not keen to move. So, when I saw the NOS filter/oiler come up on eBay I got it just in case.

The air cylinder rebuild kit was ordered through Ross Air Works, and the Shutterstat itself was bought from C&J in Minnesota. I'll probably replace the air lines themselves if there is any sign of dryness or cracking when I get things opened up.

The shutters themselves move freely. I've been keeping them lubricated and have moved them manually a few times a year hoping to get them working at some point.

Seems like I've got everything in place now to get the shutters working again. Probably won't get to it till I start working on the bus in the early spring, but it's nice to be able to find all the parts and supplies needed.

For those curious as to why? Simple, because I can.

Alpine36 · 11-27-2020, 02:22 PM

Quote:

Originally Posted by richard5933

Brief project update...

Found some Shutterstat Fluid - sealed can never used. The oil inside seems to be good and not gummed up. I was expecting an odd smell since it has a solvent content, but didn't expect that smell to be mildly similar to the smell of Windex. The closest thing I've found to it so far was Marvel Mystery Pneumatic Tool Oil. I'll run some side-by-side wicking tests to see how they compare.

The airline filter/oiler on my bus has been on there unopened for 46 years. On initial inspection the screws and fittings seem pretty well stuck and not keen to move. So, when I saw the NOS filter/oiler come up on eBay I got it just in case.

The air cylinder rebuild kit was ordered through Ross Air Works, and the Shutterstat itself was bought from C&J in Minnesota. I'll probably replace the air lines themselves if there is any sign of dryness or cracking when I get things opened up.

The shutters themselves move freely. I've been keeping them lubricated and have moved them manually a few times a year hoping to get them working at some point.

Seems like I've got everything in place now to get the shutters working again. Probably won't get to it till I start working on the bus in the early spring, but it's nice to be able to find all the parts and supplies needed.

For those curious as to why? Simple, because I can.

Nice find, almost like finding a NOS can of Prop Wash.
Good to know my remaining brain cells thought it was sorta like Marvel Mystery Oil. We had several old enclosed trailer mounted 8V powered 350KW gensets with shutterstats at the PUD back in the 80s that I used to maintain. Pretty sure they were Nam era surplus specials. Glad to see your keeping things old school dependable. Like they say, they sure don't make em like they used to.

richard5933 · 03-03-2021, 03:49 PM

Quick followup on this project as it finally nears completion.

I filled the NOS airline oiler/filter with the Shutterstat fluid today and got it installed, and then was able to confirm that the shutters themselves now open and close smoothly on their own with air. Guess oiling those shutters over the past few years even though I couldn't use them paid off, as they worked great.

Only one piece left to test, the Shutterstat itself. I'll need to get the engine to full temp, and then I'll be able to check to make sure that it closes the air supply to the shutters as it should, and I hope to do that this weekend when I get the coach out for its first run for the season.