Craftsman 919-152251 - Question on a ABP-446 Pump

by Neil Cunningham
(Hickory NC)

I have a new to me Craftsman 919-152251 Air Compressor.

The pump is leaking between the head and the air outlet.

I have ordered the gasket and just wondered if i need to use any sealant on it or just put it on and snug it down?

Does anybody have any info on this pump; torque settings?

Also does anyone know the high pressure this pump can do? I was under the impression that 2 stage pumps would be in the 175 PSI and this unit is not set that high?

Just curious?

Comments for Craftsman 919-152251 - Question on a ABP-446 Pump

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Jun 06, 2018
Craftsman 919-152251 re: last two comments...
by: Doug in

Usually, they're marked with the release value. If not, you have find someplace (maybe a gas or tire shop) that has enough to make it pop, and a regulator to control the pressure.

I must have found those specs somewhere buried in a manual, but once again, I can't find it at the moment. Annoying. Sorry.

Jun 05, 2018
The pump is ABP446
by: Anonymous

Where are you getting these specs.. do you have a manual?

Jun 05, 2018
The pump is ABP446
by: Anonymous

The motor says it's 5hp. Is there way to tell what value the PRV is?

Jun 04, 2018
Neil -
by: Doug in

Here are the pertinent specs:

15.33 cfm @ 100psi
13.75 cfm @ 175 psi (w/ 5 HP motor)
3.0 - 5.0 HP
Min RPM 700 Max RPM 1400
Max pressure 175 psi
Flywheel 13.78"

So yeah, you may need to use a smaller pulley and less pressure if your motor is less than 5 HP.

Running up to 175 psi is OK if the tank can handle it - that's dependent on the PRV. If the PRV is say 160 PSI, then you'd best stay at 150 max.

Have fun.

Jun 03, 2018
Max pressure
by: Neil Cunningham

So you are saying 175 but the switch is set to like 150. Is it safe to raise the high pressure to 175?

Thanks on the 18.1 torque setting just got the gasket this week and putting it on this week...


Also.. my brother in law says the pulley on the motor is too large and suggest I put on a smaller pulley says it will start the motor up better.. since I got this used not sure.
I have basically cleaned the motor up cleaned all contacts had to replace the thermal switch which went bad.. went in and cleaned up the armiture surface rust. Motor seems to run good and quiet..

May 04, 2018
by: Doug in

May 3 poster: 175 psi

May 2 poster: same or similar to the head gasket, if you can tell what it is. See ICS post below.

May 03, 2018
What pressure from pump?
by: Anonymous

So what pressure will this pump produce?

May 02, 2018
Have to make a gasket
by: Anonymous

I am going to have to make a gasket. What should I use I have several different gasket material here ...
Also should I use sealant on it..

May 01, 2018
919.175251 with ABP-446 Pump torque spec
by: Doug in

Couldn't find a spec for the 446, but the replacement 4900 pump is virtually identical.

All the bolts into or through that head are 18.1 ft/lb, so I'd go with that for your part.

Good luck.

May 01, 2018
The pump is ABP446
by: Anonymous

The pump is ABP 446 the compressor is 91.175251

Apr 30, 2018
ABP-446 gaskets
by: ICS

Depends on the material the gaskets are made of. If they are graphite gaskets, no sealer should be needed. If it is paper, and all surfaces are clean and smooth, no sealer will be needed, however, I always like to use a thin coat of sealer on any paper type gaskets as the next time you remove them it will be a lot easier.

Apr 28, 2018
by: Doug in

Pressure is limited by the motor, probably.

But I'm not finding 919.152251 - confirm model?

And there's probably a torque spec for the head.

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