Great video...one thing...the little bolt that holds the fan on is left hand thread, I found that out the hard way. When you think you are loosening it, you are tightening it!
That's always the $64,000 question...If you don't use your compressor often or if you're a weekend warrior, a HF unit may work well for you. Sure, they're not quality units and aren't durable, but it may work out for someone who uses the compressor infrequently. Otherwise, rebuilding your current compressor is probably the better option. Thanks for the comment!
If a man was to take apart his compressor and there was nothing wrong with it, is there anything he could or should do to extend the life of the components? Mainly the ring on the piston.
You don't have to remove the connecting rod. You just remove the piston end cap that holds the ring on, slide the ring into the cylinder sleeve and into the ring receptacle groove on the piston, replace piston cap. So much easier and faster. Plus if you lock the piston at top dead center, it perfectly aligns the ring to the piston/cylinder wall.
Hi, where can I buy compression piston ring only for Craftsman model # 921.165720 ( 33 gallon, 165 psi) I'm having a problem finding it online or in stores. Thank you.
my piston arm cracked in half when the unit tipped over I screwed the piston back together with braces on each side I will let yall know how much it explodes , if it does
Thanks for the question! If the piston ring you received has a lip or cup on the outer edge then yes, it does matter. You want that lip or cup to face up on the piston. If the piston ring you received is flat then no, it doesn't matter, because the piston ring will form into the correct shape when the unit runs. Hope this helps!
It's a good idea to do this, yes. Typically, you break in a new compressor to help "seat" the valves so if you're not replacing the valves as well it's not really necessary, but it's a good idea anyway. When running the unit without the discharge tube connected to the head, the pump doesn't have to work as hard. This will also allow the oil-free piston ring to seat inside the cylinder wall. It certainly can't hurt. Thanks again for the questions!
Thanks for the question! No, oil-free air compressors do not require the piston ring to be lubricated. The compression ring has a Teflon coating that does not require any lubrication. Hope this helps.
@@MasterToolRepair Thank you so much for the input. I based my question on my previous ring replacement and it happened to have lasted only a few uses. Now that I disassembled it I find it torn (due to not building up enough pressure).
HI - Thanks for the video ... I have a related question. - can anyone help me cross-reference a Piston kit? I have an old craftsman twin-cylinder oil-free unit; - but the piston / Rod is No longer made. Seems like a similar size piston and cup could be dropped in.. But it's just a guessing game without measurements on the parts diagrams. id need to match diameter and rod length.. ? Any ideas on how to replace a broken Rod when no " replacement" part is available. ?
@@MasterToolRepair THanks >: there is a patent marking 5.231.917.. ! I've taken these other measurements with a digital caliper. i have one rod/piston still intact . Bearing OD 40 mm bearing ID 16.7 mm Sleeve ( cup) Id ( piston bore ) 60 MM slive od 62.5 mm sleeve length 50mm sleeve lip diameter 74 mm Overall length Top of rod cap to the bottom of the rod casting 147 mm operational length from crank centerline to Top of piston assembled 115 MM My selves are in good shape and bearings are ok. I even have a spare set of seal from the last time the rods cracked. i need 2 pistons. if it's a direct fit. Thaks for your assistance !! ( Scott )
@@scotthull4400 I'm glad you could read the patent number on the rod because I think we have what you need! The most most popular kit DeVilbiss (who made these units) used was the "KK-4835" kit, which comes with the rod, compression ring, piston top, screw, bearing and two o-ring gaskets on either side of the valve plate. They have discontinued this but we have it available...we contacted the foundry who made these for DeVilbiss and are offering them. You can view the kit on our site at the below link: mastertoolrepair.com/kk4835-pistoncylinder-kit-kk-4835-kit-p-478.html The kits are slightly different than the original DeVilbiss kits. For one, the bearing is already installed and the rod is a press-on fit...there is no screw to tighten it to the eccentric. Please be sure to read all of the notes and description for this part on our site prior to ordering (if you do). I hope this helps!
@@MasterToolRepair that helps a TON. It’s not the most amazing tool but it gets the job done for me and I’m happy i won’t have to replace it, at least not yet. Excellent !! 😀
I would like to have your email address. I have a pdf would like for you to review and provide feedback on a problem I am having with my oil free air compressor.
Great video. Highly recommend including a link to this video when shipping out the compression ring kits.
We appreciate the compliment and the suggestion, Paul!
Great video...one thing...the little bolt that holds the fan on is left hand thread, I found that out the hard way. When you think you are loosening it, you are tightening it!
You are correct...this is many times the case! Good advice.
My old Craftsman had right handed threads but I would use caution because these fans (mine at least) are plastic and potentially brittle.
Yep I did exactly as you explained, thank you I was wondering why it shredded
Thank you for the video doing one this weekend probably would have tried to force it from the top
This was very helpful thank you now I just need to decide if I spend 94$ on the kit or buy a new compressor for 150$ at harbor freight...
That's always the $64,000 question...If you don't use your compressor often or if you're a weekend warrior, a HF unit may work well for you. Sure, they're not quality units and aren't durable, but it may work out for someone who uses the compressor infrequently. Otherwise, rebuilding your current compressor is probably the better option. Thanks for the comment!
If a man was to take apart his compressor and there was nothing wrong with it, is there anything he could or should do to extend the life of the components? Mainly the ring on the piston.
Por fin pude ver a alguien q enseño el pistón con su junta torica
I have a 6hp v twin cylender from crafts man, do I have to buy 2 cylender kits?
You don't have to remove the connecting rod. You just remove the piston end cap that holds the ring on, slide the ring into the cylinder sleeve and into the ring receptacle groove on the piston, replace piston cap. So much easier and faster. Plus if you lock the piston at top dead center, it perfectly aligns the ring to the piston/cylinder wall.
I disagree
Hi, where can I buy compression piston ring only for Craftsman model # 921.165720 ( 33 gallon, 165 psi) I'm having a problem finding it online or in stores. Thank you.
I have the tool shop brand purchased at menards how does a guy get the right kit
What is the price for the piston and gaskit
Recomiendan algun tipo de lubricante en el anillo para evitar desgaste o solo
my piston arm cracked in half when the unit tipped over I screwed the piston back together with braces on each side I will let yall know how much it explodes , if it does
How did you take the plastic fan off?
on the new piston ring does it matter which side is up when installing on piston
Thanks for the question! If the piston ring you received has a lip or cup on the outer edge then yes, it does matter. You want that lip or cup to face up on the piston.
If the piston ring you received is flat then no, it doesn't matter, because the piston ring will form into the correct shape when the unit runs.
Hope this helps!
What is the part number for that piston kit sir?
My Coleman doesn't have a fan...apparently never had one.
What sides it’s that pisotón?
What's the parts you used
When it comes to piston and head plate gasket replacement, should I do the breaking period just like I would with a brand new compressor?
It's a good idea to do this, yes. Typically, you break in a new compressor to help "seat" the valves so if you're not replacing the valves as well it's not really necessary, but it's a good idea anyway. When running the unit without the discharge tube connected to the head, the pump doesn't have to work as hard. This will also allow the oil-free piston ring to seat inside the cylinder wall. It certainly can't hurt. Thanks again for the questions!
@@MasterToolRepair thank you for your explanation.
Should I lube the cylinder wall for breaking in purposes?
It seems to me a dry start up may cause a damage to the ring.
Thanks for the question! No, oil-free air compressors do not require the piston ring to be lubricated. The compression ring has a Teflon coating that does not require any lubrication. Hope this helps.
@@MasterToolRepair Thank you so much for the input.
I based my question on my previous ring replacement and it happened to have lasted only a few uses. Now that I disassembled it I find it torn (due to not building up enough pressure).
@@abemelendez8477 I'm glad to help! Feel free to post any more questions you may have and I'll do my best to answer.
@@MasterToolRepair Thank you..I will
HI - Thanks for the video ... I have a related question. - can anyone help me cross-reference a Piston kit? I have an old craftsman twin-cylinder oil-free unit; - but the piston / Rod is No longer made. Seems like a similar size piston and cup could be dropped in.. But it's just a guessing game without measurements on the parts diagrams. id need to match diameter and rod length.. ? Any ideas on how to replace a broken Rod when no " replacement" part is available. ?
Is there any number cast into the rod? Casting may say ACG-1, CAV 3 or Patent 5.231.917.
@@MasterToolRepair THanks >: there is a patent marking 5.231.917.. !
I've taken these other measurements with a digital caliper.
i have one rod/piston still intact
.
Bearing OD 40 mm bearing ID 16.7 mm
Sleeve ( cup) Id ( piston bore ) 60 MM slive od 62.5 mm
sleeve length 50mm
sleeve lip diameter 74 mm
Overall length Top of rod cap to the bottom of the rod casting 147 mm
operational length from crank centerline to Top of piston assembled 115 MM
My selves are in good shape and bearings are ok. I even have a spare set of seal from the last time the rods cracked. i need 2 pistons. if it's a direct fit.
Thaks for your assistance !! ( Scott )
@@scotthull4400 I'm glad you could read the patent number on the rod because I think we have what you need!
The most most popular kit DeVilbiss (who made these units) used was the "KK-4835" kit, which comes with the rod, compression ring, piston top, screw, bearing and two o-ring gaskets on either side of the valve plate.
They have discontinued this but we have it available...we contacted the foundry who made these for DeVilbiss and are offering them.
You can view the kit on our site at the below link:
mastertoolrepair.com/kk4835-pistoncylinder-kit-kk-4835-kit-p-478.html
The kits are slightly different than the original DeVilbiss kits. For one, the bearing is already installed and the rod is a press-on fit...there is no screw to tighten it to the eccentric.
Please be sure to read all of the notes and description for this part on our site prior to ordering (if you do).
I hope this helps!
@@MasterToolRepair that helps a TON. It’s not the most amazing tool but it gets the job done for me and I’m happy i won’t have to replace it, at least not yet.
Excellent !! 😀
Great job, thanks!
Is it me or this dude have a wooden watch? I have a couple different all wood watches as well lol.
He does indeed! He gets a lot of compliments on it too, case in point!
Where can I get a kit
amazon has these kits.
Good explain
I would like to have your email address. I have a pdf would like for you to review and provide feedback on a problem I am having with my oil free air compressor.
Awe some!!
Master, two phone number 1:46 1:46
Message to number 0:56