IR 253 VS 2475

[sundown57]

ok guys here's one for you. I have an Ingersoll Rand T30 253 that I bought new back in 1988. still runs fine. I just pick up a brand new t-30 2475. I need to use one and sell the other . what one do I keep ?

 

[cvairwerks]

Which one has the slower motor speed?

 

[jblnut]

Seems like you may have already made the decision when you decided to buy the updated model

Keep the 2475. The 253 will be hard to get parts for when it shits the bed and since it still runs I’d dump it. It’s the perfect time to get rid of it. The 2475 may run for another 100yrs but the 2475 is definitely an upgrade.

 

[jblnut]

Which one has the slower motor speed?

I run a 2475 with a 2hp motor pullied down. It sounds like an old John Deere 2cyl

I also have a 25hp IR head running on a 7.5hp motor that is pullied way down. They are very quiet and will last a loooooooong time running so slowly. The volume of air I use they’re both perfect and produce more than I need when I need it.

 

[MacMcMacmac]

Keep the 253. Rebuild parts are dirt cheap should the need arise.

The minimum rpm of the 2475 is already higher than the max rpm of the 253. Sounds like the usual IR practice of moving a small pump up a horsepower class by revving the hell out of it.

 

[Shoreline_]

I run a 2475 with a 2hp motor pullied down. It sounds like an old John Deere 2cyl

I also have a 25hp IR head running on a 7.5hp motor that is pullied way down. They are very quiet and will last a loooooooong time running so slowly. The volume of air I use they’re both perfect and produce more than I need when I need it.

Does it even spin fast enough to sling oil?

 

[jblnut]

The 25hp head has been in service since the last ice age and the 2475 has been in service since late ‘99 with only one set of crank bearings. It sees 2-3hrs daily use now but saw 12-14hrs for the first 15yrs of its lift so it easily has 30,000hrs on it. So I’d say yeah, it seems to sling enough oil or it wouldn’t go spinny spinny and do air pump things anymore.

The 25hp head was built in the 50’s and was pulleyed down sometime in the 60’s when Gramps brought it home and didn’t have enough line pixies to run the 25hp 3ph motor. It sees use but not too much anymore since I acquired a 185cfm IR diesel unit.

 

[Shoreline_]

The 25hp head has been in service since the last ice age and the 2475 has been in service since late ‘99 with only one set of crank bearings. It sees 2-3hrs daily use now but saw 12-14hrs for the first 15yrs of its lift so it easily has 30,000hrs on it. So I’d say yeah, it seems to sling enough oil or it wouldn’t go spinny spinny and do air pump things anymore.

The 25hp head was built in the 50’s and was pulleyed down sometime in the 60’s when Gramps brought it home and didn’t have enough line pixies to run the 25hp 3ph motor. It sees use but not too much anymore since I acquired a 185cfm IR diesel unit.

What's the pump model that's 25hp? The only recip I've seen from ir that handles 25hp is equivalent to a Kellogg 462. And a 7.5hp couldn't spin over a Kellogg 462 running unloaded.

 

[jblnut]

What's the pump model that's 25hp? The only recip I've seen from ir that handles 25hp is equivalent to a Kellogg 462. And a 7.5hp couldn't spin over a Kellogg 462 running unloaded.

I believe it’s a 20t but I’d have to scrape all the goo off the nameplate. I think it runs around 125rpms the way it’s pullied which is too slow to splash lubricant but it has been working for a loooooooooong time. I’ll look closer, there may have been some old farmer creativeness to get it to lubricate properly. Gramps was quite the tinkerer.