Saylor Beall 707 compressor build

[TonyJ]

After some long searching I came across a used Saylor Beall 707 pump on the ol FB marketplace. Pump was missing the flywheel and the exhaust manifold but over all looked great in the pictures. Buyer said he bought it in the same condition for a build but ended up being more than he wanted to put into it but said “seemed” to build air by turning it by hand.

So for $200 and a 4 hour ride, 2 both ways I took the chance and went and looked at it. Got there and looked it over. I hand turned the shaft while I blocked the intake with my hand and it sucked my hand right up tight. It also did the same on the other cylinder too. So that was a plus. Oil was clean and intake valves were also clean. I really don’t think this pump had very many hours on it at all.

I already had the needed flywheel and also a 10hp single phase motor. So I ended up making me a shopping list which didn’t end up too bad I don’t believe.

Needed
2 - pop off valves, one for each after cooler 1/8 npt 70psi
1 - exhaust manifold
1 - 200 psi 1/4 npt pop off valve for exhaust manifold
2 - 1” air filter assembly’s, both covers were missing
1 - 7 3/4 2 groove pulley for the motor/with sheave

So $257 dollars later I have all of the needed parts ordered except for the necessary plumbing parts to get it connected to my tank

I will be removing my Quincy 230 from my tank and installing the SB after I get all the parts and hopefully will never have to wait on air again. The Quincy is great but at 100psi max pressure it struggles when it comes to using angle grinders and 1/2 impacts for extended periods so I will likely sell the 230 to recoup some of my investment on the SB


Tony

 

[The Tool Tyrant]

What about a pressure switch and a mag starter? Is you existing receiver rated for 200 MWP?

That's a great pump for sure.

 

[TonyJ]

What about a pressure switch and a mag starter? Is you existing receiver rated for 200 MWP?

That's a great pump for sure.

Yes on all. I originally had my ir 242 on it and always ran 195 psi then and also ran a mag starter and used the pressure switch to control the coil of the starter so there was very low amperage on the contacts in the pressure switch. The only thing I will have to check is what size heater strips I have in the starter. I think their B50’s but I’ll have to make sure. Other than that wiring is over kill and I already have a 50 amp breaker to install once I make the change


Tony

 

[TonyJ]

Compressor build is about complete. I’m down to having to get a new pressure switch. My old one won’t adjust so I can raise the pressure. Screw turns but on off point won’t change. And man is 3/4 copper a pain to bend in tight spots lol.


Tony

 

[The Tool Tyrant]

Hey Tony, Even though the 707 IS rated for 200 PSI maximum, I recommend 175 PSI as that is the factory setting cutoff and won't work the motor OR pump nearly as hard.

 

[Iron Beaver]

My compressor is rated at 175 PSI. I wired mine with two pressure switches and a DPST toggle switch to choose between them. One pressure switch is set at 90-130 PSI and one at 140-170. Complicated but well worth it for me, because I can choose to go easy on the compressor or get the max performance if I'm running something big and demanding.

 

[TonyJ]

Hey Tony, Even though the 707 IS rated for 200 PSI maximum, I recommend 175 PSI as that is the factory setting cutoff and won't work the motor OR pump nearly as hard.

Right. I will be running the off point at 175. The 200psi is what SB says is the pop off valve rating that goes in the exhaust manifold so that’s what I ordered to go in it.


Tony

 

[TonyJ]

My compressor is rated at 175 PSI. I wired mine with two pressure switches and a DPST toggle switch to choose between them. One pressure switch is set at 90-130 PSI and one at 140-170. Complicated but well worth it for me, because I can choose to go easy on the compressor or get the max performance if I'm running something big and demanding.

That is a good idea. I myself would prolly use a 125 on 150 off and a 145 on 175 off. I do like the idea tho.


Tony

 

[TonyJ]

That is a good idea. I myself would prolly use a 125 on 150 off and a 145 on 175 off. I do like the idea tho.


Tony

I’m on my way with the dual pressure switch setup. I’m going with the 105/135 and 145/175 setup. Switch’s was only 14.99 at my local rural king and I already had a DPDT switch. So for basically $30 and a little bit of time I’ll go that route. Thanks for the idea


Tony