Montgomery Ward

[bannerd]

Hey guys, picked up a gas powered air compressor last night.

Very nice man, I looked all over the unit and tried to find a specs sheet but there is nothing. I was wondering what the CFM of this puppy is? I literally held down the air gun and the PSI dipped to 90psi and then back up to a hundred. Usually my craftsman air compressor you have to wait for it to build back up pressure. Looks like a twin cylinder with a five hp briggs on it. Runs like a top for the age (1980). Anyone have any more information on these? Possibly a manual? I gave $100 for it

https://www.dropbox.com/s/6ioc7krtadq4rn2/20130723_194610.jpg

 

[John in OH]

That looks like a pretty nice little engine-driven compressor for $100! Nice find.

 

[zkling]

I was wondering what the CFM of this puppy is?

Probably around 5cfm @ 90psi. If you want an acutal number of what it is producing. Time it with a stop watch in 1/10 of a second from empty to full cut off pressure. If you want the most accurate measurement. Take note of the time every 10psi or even every 5psi. Post the results and I can calculate CFM for you.

Looks like a nice little unit even appears to have a little intercooler setup. Don't see to many gas ones that small. Me thinks someone pieced that together. Looks like an older 2 cylinder, single stage pump. Definitely something of quality though

 

[arnwoodwheels]

I had one of those, Got it new when my wife worked at Monkey Wards darn little thing got used hard every weekend lasted over 20 years.
Nice find.

 

[bglad]

How long has Montgomery Ward been out of business?

 

[SMKS]

How long has Montgomery Ward been out of business?

From Wikipedia:
On December 28, 2000, the company, after lower-than-expected sales during the Christmas season, announced it was going out of business and would close its remaining 250 retail outlets and lay off its 37,000 employees. All the stores closed within weeks of the announcement. The subsequent liquidation was at the time the largest retail bankruptcy liquidation in American history.

 

[bannerd]

Hey guys, just to give you all an update. I hooked up my sand blaster which is a 80CFM unit;
http://www.northerntool.com/shop/tools/product_7960_7960

My 7cfm craftsman couldn't keep up with this.. this little guy did. I'm very shocked and my air tools are running with way more power.

I did the timing of it if you can convert it for me;

Takes about 30 seconds from 0 to get to 100psi. I'll have to time it more tonight, I'll do it by 5psi.

 

[bannerd]

Also the guy couldn't find the service manually but he said it was either 11CFM or 24CFM.

 

[zkling]

How big is the tank on it? In gallons or just dimensions.

Yea test it again in 10 or even better 5psi increments. To get a more accurate number on CFM@Xpsi. Otherwise you will just get the average CFM over the entire pressure range.

 

[bannerd]

For every 5PSI it take about six seconds to pump up. The tank is a small 20 gallon tank. Let me know, thanks!

 

[bannerd]

Also, I want to change the oil in the compressor head. What do you all recommend? Does anyone know what the Briggs engine takes as well? I heard 30W non-detergent is what to use in the compressor head.

 

[zkling]

For every 5PSI it take about six seconds to pump up. The tank is a small 20 gallon tank. Let me know, thanks!

That is very inaccurate test data. If you aren't willing to put forth the effort to properly time it, why should I put for the effort to calculate it for you. P.S. No compressor is going to be that linear over it's entire range. Test again, this time, give it to me in a form of

10psi-->T=x seconds
20psi-->T=x+yseconds
.
.
.
.
120 (cutoff?)-->T=x+y+...... seconsds

Just for reference the 6sec for every 5psi --> ~9.5 CFM

Also, I want to change the oil in the compressor head. What do you all recommend? Does anyone know what the Briggs engine takes as well? I heard 30W non-detergent is what to use in the compressor head.

Non det 30wt for the pump. Either straight 30wt det for the motor or if used in temps below ~40°F a 10w30 or even 5w30 would be better.

 

[bannerd]

That is very inaccurate test data. If you aren't willing to put forth the effort to properly time it, why should I put for the effort to calculate it for you. P.S. No compressor is going to be that linear over it's entire range. Test again, this time, give it to me in a form of

10psi-->T=x seconds
20psi-->T=x+yseconds
.
.
.
.
120 (cutoff?)-->T=x+y+...... seconsds

Just for reference the 6sec for every 5psi --> ~9.5 CFM



Non det 30wt for the pump. Either straight 30wt det for the motor or if used in temps below ~40°F a 10w30 or even 5w30 would be better.

10 psi = 2
20 psi= 2
30 psi = 3
40psi =3
50psi = 3
60psi =3
70psi =5
80psi = 6
90psi = 8

90 is the break point before air discharges. Thank you for the oil ref

 

[zkling]

10 psi = 2
20 psi= 2
30 psi = 3
40psi =3
50psi = 3
60psi =3
70psi =5
80psi = 6
90psi = 8

90 is the break point before air discharges. Thank you for the oil ref

So your saying that it takes 8 seconds to go from 0psig to 90psig or 8 seconds from 80psig to 90psig? Or 35sec from 0psig to 90psig? Then at 90psi the engine goes back to idle and the compressor stops compressing air, going into idle mode?

 

[bannerd]

From zero to 10 it takes 2 seconds, from 10 to 20 it takes two seconds and so on. Once it hits 90psi it goes into idle mode but the compressor is still pumping just at a lower volume. Does that make sense? Also I think the top part where the orange line is... is a air cooler or an extension to cool the head down faster.