Pulley and Pump question

Clean County PW

Clean County PW

Active member
I just bought two more GP pumps TSF2021 which are supposed to be rated 1450 RPM. I went to Grainger this week to get the 2 groove pulley letter B with a 1" shaft for my 30 HP kohler engine. I also got a a 2 groove pulley for my pump with a 1 and an 1/8 shaft. The closest pulley I can get was the 3.95 for the engine and the 8.7 diameter for the pump. With this formula am I right to figure this like this where you take the 3.95/8.7 pulley and x by 3600 rpm of engine to get the pump speed?

Also Since now because of the above my pump will turn at 1634Rpm.. How does that compare to the pump being rated @ 1450 Rpm's. Will I shorten the life of the pump and also is it ok for this pump shaft to be rotating at a slightly hire RPM's
 
You can get a 2BK36H for the engine, which is 3.76" OD. That will get you where you need to be.

And, the pump crankshaft is 24 mm, not 1 1/8"
 
Russ Johnson said:
You can get a 2BK36H for the engine, which is 3.76" OD. That will get you where you need to be.

And, the pump crankshaft is 24 mm, not 1 1/8"
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Your right.. I get bad info on the pump shaft.. Darn I'm screwed. I need it today..
Am I doing something wrong here when it comes to the math if I take your 3.76/8.7=1555rpm's which is still above the 1450 spec of this Tsf2021 pump. Is there an acceptable RPM that you can be over and what does the higher RPMs to the pump mean such as does it give you now more psi??
Thanks Russ
 
The engines are rated max hp @ 3600 rpms, when, in actuality, with a load they run around 3400. At 3400, your pump speed will be 1469, which is acceptable. Max speed on a TSF2021 is 1750. TSF2021 rating: 7 gpm @ 1450, 8.5 @ 1750.

Do you have any Generals laying around with a pulley on them? Most are 24 mm.
 
Russ Johnson said:
The engines are rated max hp @ 3600 rpms, when, in actuality, with a load they run around 3400. At 3400, your pump speed will be 1469, which is acceptable. Max speed on a TSF2021 is 1750. TSF2021 rating: 7 gpm @ 1450, 8.5 @ 1750.

Do you have any Generals laying around with a pulley on them? Most are 24 mm.
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Ahh that makes sense. I didn't factor in the load on the gas engine. Diesel engines the load stays closer to the specs. As for the wrong pulley's I screwed that up now when I look at it. I gave grainger the wrong sizes.. We actually blew a pump up last week. I never seen anything like it. You heard suddenly loud bangs and then the pump literally blew up. Its a udor pump so I Ordered the pumps we use most which are GP pumps. I do like the Udors though because there insides seem to be of much better quality.. But apparently where only the second company this ever happened to so udor is taking the pump back and there giving me a full refund because they want to study the pump.

I always get the crazy shizz with things... I sonic boomed my propane setup years ago, a had an unloader right next to me blow about 50' in the air because the bypass got stuck, I blew up an actuator casing while adjusting it and now after probably 800 hrs while doing estimates right next door where my guys were at I hear what sounds like shot fired and then bang.... Yup my pump exploded!
 
John,
you might need technical coaching.. Safety is in the details. call me if you like.

the 30hp motor should give you 7gpm with a nozzle #6.5 at about 3400 to 3600psi,
but make sure your safety relief is new also..
things need to stop blowin-up around you, Eh?
 
Sirocco Jerry said:
John,
you might need technical coaching.. Safety is in the details. call me if you like.

the 30hp motor should give you 7gpm with a nozzle #6.5 at about 3400 to 3600psi,
but make sure your safety relief is new also..
things need to stop blowin-up around you, Eh?
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Lol.. Ain't that the truth. I never was an ace mechanic but I can fix things. My father has the mindset to fix anything. He's a designer. When we use to race cars my father would fix em and we both race the same car in the same class.. I could drive but not design and fix.
Yes I could use a few classes and welding should be one of them.. Put a class like that in and watch how many show up. Drills and screws serve there purpose but welding is KING in design work...

Hey Jerry are you Canadian at all? I use to play a ton of Hockey and the canadiens were always saying "pretty good Eh?" best players I ever seen.. Pretty good Eh was them just being nice.. Pretty great would be more like it.
 
I'm from Missouri, raised by corn-and-beef-fed farmers, transplanted to Calif. very young.
But, I've been dealing with people over the phone for 30 years
Once I heard a few northerners use the expression, I interpreted it as a leading question..
It is short for "think about it". Eh?
AS for the racing analogy..
I have always spend more time in the pit area, than worrying about who won a single race..
The equipment is what fascinates me..
I LOVE troubleshooting and bullet-proofing.
 
offdutyfireman said:
Udor is awesome. I had a 4 year old Udor develop a crack in the housing. They gave me a bramd new one, repaired the old one and shipped it back to me. Why anyone that does this for a living would buy anything else is beyond me. I like the 5 thousand hour interval between rebuilds.
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Best pump I ever had and I sold it to someone on this bb was a Udor 11gpm rated @ aprox 4800 psi. I think the guys name is Cooper who bought it. I had that pump for a few years and it was great. Because I never had problem with this UDOR pump I had no idea it was worth over $4000 new since I bought the whole setup used with only 2 hrs on it..
This UDOR that broke that what happened. The casing broke from the inside out. Worst thing I ever seen from a pump..
It was a freak thing and I agree UDOR's are the best all around pump.
For the money though because now I'm starting to buy extra items so we never shut down, GP pumps are the best bang for the buck..so I bought Two.
 
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