CylinderService said:
my cylinder is a 4" bore and 24" stroke i`m not sure about the pump , and i think the hose ends are 1/2" , maybe i could increase the hose and make it run a hair faster or go to a 3" bore and a 24" stroke
log splitter repair
- Thread starter tocold4u2
- Start date
Help Support Arborist Forum:
my cylinder is a 4" bore and 24" stroke i`m not sure about the pump , and i think the hose ends are 1/2" , maybe i could increase the hose and make it run a hair faster or go to a 3" bore and a 24" stroke
An interesting discussion!
Lots of good ideas here.
For what it is worth, my splitter has
15hp engine
16GPM pump
5" cylinder
1/2" hoses. I probably am losing some in the hoses. If the pump had come with 3/4" outlet, then I would have run 3/4 hose... The tank is fairly large with 14-16 gallons oil in a 20 gallon tank.
Works for me, but the cycle time isn't the fastest.
-Pat
Lots of good ideas here.
For what it is worth, my splitter has
15hp engine
16GPM pump
5" cylinder
1/2" hoses. I probably am losing some in the hoses. If the pump had come with 3/4" outlet, then I would have run 3/4 hose... The tank is fairly large with 14-16 gallons oil in a 20 gallon tank.
Works for me, but the cycle time isn't the fastest.
-Pat
CylinderService
ArboristSite Operative
Logsplitter cycle time
I'm a little uncomfortable promising you guys faster cycle time if you make this or that improvement. There's no question that 16 GPM will be restricted going through a 1/2" line, but whether changing lines, fittings, valves, etc will be worth the cost is best determined by the "try it & see" method.
But here's some info which may help you determine how close your times come to the theoretical time of a cylinder running at 16 GPM:
These are inches per second, cylinders extending:
3" cyl - 8.6
3.5" cyl - 6.4
4" cyl - 5.0
4.5" cyl - 3.8
5" cyl - 3.2
6" cyl - 2.2
Retraction speeds are faster because the rod reduces the amount of oil in that end of the cylinder. The larger the rod, the faster the retraction.
You wouldn't expect to equal these speeds, but if your times are a lot slower you can probably make improvements with larger components.
Hope this helps.
Don
I'm a little uncomfortable promising you guys faster cycle time if you make this or that improvement. There's no question that 16 GPM will be restricted going through a 1/2" line, but whether changing lines, fittings, valves, etc will be worth the cost is best determined by the "try it & see" method.
But here's some info which may help you determine how close your times come to the theoretical time of a cylinder running at 16 GPM:
These are inches per second, cylinders extending:
3" cyl - 8.6
3.5" cyl - 6.4
4" cyl - 5.0
4.5" cyl - 3.8
5" cyl - 3.2
6" cyl - 2.2
Retraction speeds are faster because the rod reduces the amount of oil in that end of the cylinder. The larger the rod, the faster the retraction.
You wouldn't expect to equal these speeds, but if your times are a lot slower you can probably make improvements with larger components.
Hope this helps.
Don
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log splitter repair
ok i got the ram & pushblock re welded got it hooked back up , and wouldn`t you know it ,,,the bat . was dead :bang:
anyways i have a question for (CYLINDER SERVICE)
how about if i made the 1/2 line that pushes the cylinder foward into 3/4
and then leave the return line at 1/2 " would it help? or just change both lines to 3/4 it`s a 4 x 24" but i`m not sure on the pump
i will get a picture of the splitter maybe tomorrow after i put the bat back in
ok i got the ram & pushblock re welded got it hooked back up , and wouldn`t you know it ,,,the bat . was dead :bang: anyways i have a question for (CYLINDER SERVICE)
how about if i made the 1/2 line that pushes the cylinder foward into 3/4
and then leave the return line at 1/2 " would it help? or just change both lines to 3/4 it`s a 4 x 24" but i`m not sure on the pump
i will get a picture of the splitter maybe tomorrow after i put the bat back in
CylinderService
ArboristSite Operative
A 6 x 24" cylinder holds 2.94 gals, so an 8.5 sec extension time equals 20.75 GPM oil flow. Either you got a good deal on the pump, or a bad deal on the watch!
ToCold, putting a bigger line on the extension port of your cylinder might help, since that end of the cylinder holds more oil. The highest flow occurs on retraction, when the oil going out of the base end exceeds the pump rate. The bigger the rod, the more the difference. Good thinking!
Don
ToCold, putting a bigger line on the extension port of your cylinder might help, since that end of the cylinder holds more oil. The highest flow occurs on retraction, when the oil going out of the base end exceeds the pump rate. The bigger the rod, the more the difference. Good thinking!
Don
WOW!!! thanks for explaining how it works. It appears I'm already getting flow excess of spec's of 16gpm. timed with a Marathon TSAR
where can you find capacity data for other size rams?
where can you find capacity data for other size rams?
CylinderService said:
CylinderService
ArboristSite Operative
All you need to know for this is the diameter & stroke of the cylinder, and how long it takes to stroke.
The volume of a cylinder is Pi r squared times length, all in inches. Divide by 231 (cubic inches per Gal).
If the cylinder extends in 8.5 sec, divide the cyl volume in gallons by 8.5 to get gallons per sec, then multiply by 60 to get gallons per minute.
For your cylinder the calculations are:
3 x 3 x 3.14 x 24" = 678.24 cubic inches
divided by 231 = 2.94 gal
divided by 8.5 sec = .345 gal per sec
x 60 = 20.73 gal per min
Gee, I'm giving away all my secrets!
Have fun.
Don
The volume of a cylinder is Pi r squared times length, all in inches. Divide by 231 (cubic inches per Gal).
If the cylinder extends in 8.5 sec, divide the cyl volume in gallons by 8.5 to get gallons per sec, then multiply by 60 to get gallons per minute.
For your cylinder the calculations are:
3 x 3 x 3.14 x 24" = 678.24 cubic inches
divided by 231 = 2.94 gal
divided by 8.5 sec = .345 gal per sec
x 60 = 20.73 gal per min
Gee, I'm giving away all my secrets!
Have fun.
Don
log splitter repair
i basically counted 1 thousand 1, 1 thousand 2 , ect
and it was around 17 sec for a complete cycle.
the ram is 4x 24 not sure if that`s good time and not sure on the size of the pump, i would like to see what a 28 gal pump would do on my splitter.
i will get a picture of the splitter tomorrow, i have cam across a great pile of wood and was told that if the wood wasen`t removed by sunday , that i could have it . i`ll keep my eye on that wood :hmm3grin2orange:
i basically counted 1 thousand 1, 1 thousand 2 , ect
and it was around 17 sec for a complete cycle.
the ram is 4x 24 not sure if that`s good time and not sure on the size of the pump, i would like to see what a 28 gal pump would do on my splitter.
i will get a picture of the splitter tomorrow, i have cam across a great pile of wood and was told that if the wood wasen`t removed by sunday , that i could have it . i`ll keep my eye on that wood :hmm3grin2orange:
tocold4u2,
With a 28 gpm pump the cycle time would be 4.9 seconds, with no resistance. Question is, is the nearly $400.00 price tag worth it.
With a 28 gpm pump the cycle time would be 4.9 seconds, with no resistance. Question is, is the nearly $400.00 price tag worth it.
neighborstree
ArboristSite Operative
go buy A NEW splitter..i guess we all dont live by my standards lol
CylinderService
ArboristSite Operative
17 sec cycle time
Tocold,
17 sec for a complete cycle would be equal to about 8 GPM. I don’t remember what pump you have, but if it’s a 2 stage pump, it’s not doing too well. The pump may be worn out, or there may be too much restriction in your valve & hoses.
I agree with triptester’s calculations, but “no resistance” is the key. Unless all the lines and the ports on your valve and cylinder are 3/4" or larger, you probably won’t be able to push 28 GPM through the system.
There’s a lot of room between 28 GPM and 8 GPM. For most people with a 4 x 24 cylinder, a 16 GPM 2-stage pump makes a nice splitter, and would cycle in about half the time you’re getting now. And they’re a lot less than $400!
Or you could borrow some easy money from “neighborstree” and go buy a new one!
Good Luck & Happy New Year,
Don
Tocold,
17 sec for a complete cycle would be equal to about 8 GPM. I don’t remember what pump you have, but if it’s a 2 stage pump, it’s not doing too well. The pump may be worn out, or there may be too much restriction in your valve & hoses.
I agree with triptester’s calculations, but “no resistance” is the key. Unless all the lines and the ports on your valve and cylinder are 3/4" or larger, you probably won’t be able to push 28 GPM through the system.
There’s a lot of room between 28 GPM and 8 GPM. For most people with a 4 x 24 cylinder, a 16 GPM 2-stage pump makes a nice splitter, and would cycle in about half the time you’re getting now. And they’re a lot less than $400!
Or you could borrow some easy money from “neighborstree” and go buy a new one!
Good Luck & Happy New Year,
Don
log splitter repair
i will give it a look over ,,,,not sure what the pump is , i know the lines are 1/2" the splitter isn`t fast , but not slow either, maybe it needs turned up a bit?? this is a home made splitter and i haven`t done nothing to it yet but fixed the ram. i`ll get a pic of it
i will give it a look over ,,,,not sure what the pump is , i know the lines are 1/2" the splitter isn`t fast , but not slow either, maybe it needs turned up a bit?? this is a home made splitter and i haven`t done nothing to it yet but fixed the ram. i`ll get a pic of it
i didn`t get a chance to look at the log splitter pump yet , but maybe the pump is just a single stage and not a 2 stage ??
i had a friend call me and ask if i wanted some wood , i went over to get it thinking it was soft wood,,well it turned out to be cherry , oak and walnut , i got probally 3/4 -1 cord . the wood needs split , i guess that will give me a reason to look at the splitter now
i had a friend call me and ask if i wanted some wood , i went over to get it thinking it was soft wood,,well it turned out to be cherry , oak and walnut , i got probally 3/4 -1 cord . the wood needs split , i guess that will give me a reason to look at the splitter now
log splitter repair (pump)
ok triptester and cylinder service , i found a tag on my pump here`s what it says (john s barnes) rockford IL
( 12/84 ) 1300159
GC-6016A18RB01
can anyone decode this or tell me what size pump and all i have here , and where i could send this to get it rebuilt, or order the items to rebuild it ???
i was thinking that it is a made in 1984 and that it`s a 16 gpm that`s just my guess from the #`s any help out there , thanks:biggrinbounce2:
tonight i fired up the splitter , it hasen`t been run for 2 weeks, i let it run for 3-5 min then tried the ram, it was moving real slow , i figured that the fluid was still cold, i had to shut the splitter down cause i had to unload a truck load of walnut,oak,ash,and cherry.
anyone thinks that maybe a filter change would help? fluid change?
i will look it over sunday , i would saturday , but i will be out deer hunting.
if i would happen to need a new 2 stage pump should i go with 16 or the 22
barnes pump??
thanks for any help
ok triptester and cylinder service , i found a tag on my pump here`s what it says (john s barnes) rockford IL
( 12/84 ) 1300159
GC-6016A18RB01
can anyone decode this or tell me what size pump and all i have here , and where i could send this to get it rebuilt, or order the items to rebuild it ???
i was thinking that it is a made in 1984 and that it`s a 16 gpm that`s just my guess from the #`s any help out there , thanks:biggrinbounce2:
tonight i fired up the splitter , it hasen`t been run for 2 weeks, i let it run for 3-5 min then tried the ram, it was moving real slow , i figured that the fluid was still cold, i had to shut the splitter down cause i had to unload a truck load of walnut,oak,ash,and cherry.
anyone thinks that maybe a filter change would help? fluid change?
i will look it over sunday , i would saturday , but i will be out deer hunting.
if i would happen to need a new 2 stage pump should i go with 16 or the 22
barnes pump??
thanks for any help
The barnes pump # 1300159 is a 11 gpm pump.
log splitter repair (pump)
thanks for the info triptester,,,,if that is the case then i will get a new pump , atleast a 16
i would say that the old pump is getting weak
we will see sunday when i get time to look at itopcorn:
thanks for the info triptester,,,,if that is the case then i will get a new pump , atleast a 16
i would say that the old pump is getting weak
we will see sunday when i get time to look at it
opcorn:
