Ok yall . Ive got a 2002 T7.I love the machine but I need some help. The crowd cylinder needs replaced. Terramite wants $600 at least to replace it.Im not looking to spend that! The original was replaced a long time ago so I cant get the specs on it and the company wont give it up. The leaking one came from a boneyard and I dont believe its the right one altho it worked for awhile.Can anyone help a brother out?LOL. Again its the crowd cylinder on the backhoe.Thanks in advance.Bundy.
T7 backhoe cylinder help
- Thread starter bundyal
- Start date
- Views: 10844
JonnyRed
Silver Member
You could always measure it.
Easy to do and will answer all of your questions.
How to measure a hydraulic cylinder replacement - Magister Hydraulics - YouTube
I have bought 4 cylinders off of Amazon made by Mighty Cylinders, well built and affordable.
Welded Cylinder - Tube Cross >> CompanyName.com - Super Slogan
Just out of curiousity, when did you last speak with terramite?
Easy to do and will answer all of your questions.
How to measure a hydraulic cylinder replacement - Magister Hydraulics - YouTube
I have bought 4 cylinders off of Amazon made by Mighty Cylinders, well built and affordable.
Welded Cylinder - Tube Cross >> CompanyName.com - Super Slogan
Just out of curiousity, when did you last speak with terramite?
I spoke with them 2 days ago and asked if they're gonna stay in business and they told me yes. The problem I have is I dont have the original cylinder. I may just have to measure the leaky one after all. Thanks for the info.
DoubleO
Member
Just because a cylinder is leaking doesn't mean you have to replace it. Do some research on how to disassemble and rebuild them, it's all on the internet and youtube. It isn't too difficult and will save you $$.
Or take the cylinder off and bring it to a local hydraulic shop or even a local tractor dealer. If you do take it apart and need to order seals but can't figure the seal sizes, mail the seals to a hydraulic shop and have them match them up.
I walked into Devine Hydraulics here in CT with a handful of seals and they measured them and matched them up.
Below is a previous post about this subject.
https://www.tractorbynet.com/forums/hydraulics/219063-finding-seals-unknown-hydraulic-cylinders.html
Or take the cylinder off and bring it to a local hydraulic shop or even a local tractor dealer. If you do take it apart and need to order seals but can't figure the seal sizes, mail the seals to a hydraulic shop and have them match them up.
I walked into Devine Hydraulics here in CT with a handful of seals and they measured them and matched them up.
Below is a previous post about this subject.
https://www.tractorbynet.com/forums/hydraulics/219063-finding-seals-unknown-hydraulic-cylinders.html
stendek
New member
I had good success replacing cylinders with generic ones from surplus center. I’d measure your existing and just order a replacement and or take yours apart and see if you can get seals. Only caveat is almost all the replacement cylinders uses different connects than the npt threaded ones terramite uses. Luckily they make adapters for everything. There is a previous thread with all the stock measurements that might help.
The crowd and the boom cylinders are the same. Your T7 uses the same as my T6. Should be part #81027. 3" bore, 1 1/2" rod, 24" pin centers closed, 40" extended. Cross tubes are 1 1/4" bore, butt end 3 1/2" long, rod end 3". Hope this helps.
AllDodge
Platinum Member
- Joined
- Apr 28, 2017
- Messages
- 515
- Location
- S, Central, KY
- Tractor
- Terramite T5C, Kubota M9540HDC24, F3990, RTV1100, Cat 416C, D3B, 955L
Don't know about the T7 but I replaced all the seals on every cylinder on my T5 and for the most part was easy enough. The seal kits cost around 50 each from Terramite, or a hydraulic shop would know what to use
stendek
New member
I’d be interested if someone could post seal part numbers for the different cylinders or at least measurements so people could order them from somewhere other Terraquip. There are about $10 in seals in each cylinder so paying $50+s&h hurts. I plan to do this as I take cylinders apart but haven’t gotten around to doing it yet.
Terry's Terramite says the correct part# is #81190.Which doesn't help me any since I dont wanna pay $800.00+.I need to find the correct dimensions of the original cylinder so I can find one off brand,that is my problem.Its always something.I tried to get someone to straighten the bend in the piston rod so I could measure the stroke in the one I took off but nobody wants to do that.They all want to sell me a new cylinder! One guy says it'd take a week to get to it and then he could give me an estimate to straighten it.I told him I dont care if it gets dinged up as Im not using it again,it's just for measurement purposes. Then he says we've got a $100.00 minimum shop charge."WHAT??? All ya gotta do is put it in a press and squeeze it down" I thought to myself. "What ,maybe 15 minutes of work?" So,I didn't go there. Im still looking. I was tempted to buy one of those HF presses but ya gotta get on your knees to use them and they just dont look safe enough to me to risk 12 -20 tons of pressure to send a hunk of steel hurtling towards my forehead.
I buy quite a few of HF tools but nothing that'll kill or maim me!
I buy quite a few of HF tools but nothing that'll kill or maim me!
If you go to the Terramite website you can download the T7 parts book. On page 2.41 it lists 81027 as the number for the boom and the crowd cylinders. My T6 book lists the same number and the dimensions I gave were measured off my cylinders that I just finished repacking. If you look in the parts book you have to be careful because that book also lists cylinders for T5's. If you don't want to believe me then measure your boom cylinder it's the same as used on the crowd.
AllDodge
Platinum Member
- Joined
- Apr 28, 2017
- Messages
- 515
- Location
- S, Central, KY
- Tractor
- Terramite T5C, Kubota M9540HDC24, F3990, RTV1100, Cat 416C, D3B, 955L
There was probably a part number change, so the cylinder old number was 81027 and the replacement is 81149. If the seal kit was needed then it would be matched up to the old number, but looking for the entire cylinder, then it list 81149
There can also be serial number changes which would change the part number again like the 81190 number. Cab also be an issue with the person looking up the numbers
When replacing my seals, they asked for the serial number, but I had to measure the boom cyl because there were 2 different ones used during the year mine was built.
DoubleO
Member
The manual says 81190 for machines prior to 1-1-01 for both the boom and crowd. After that date it would be 81222 for the boom, where your machine falls in. With that in mind, take a good look at the boom cylinder, it might be the same as what you need for the crowd. Not knowing, the difference could just be the cylinder rod diameter. Now with that info, you might be able to find it at Surplus Center.
Dart1917 gave you the dimensions you need. 3" bore, 1 1/2" rod, 24" pin centers closed, 40" extended. Cross tubes are 1 1/4" bore, butt end 3 1/2" long, rod end 3". These should match you boom and be very close to the crowd cylinder size since it was replaced.
I'm curious, How do you bend a Crowd cylinder rod?
Dart1917 gave you the dimensions you need. 3" bore, 1 1/2" rod, 24" pin centers closed, 40" extended. Cross tubes are 1 1/4" bore, butt end 3 1/2" long, rod end 3". These should match you boom and be very close to the crowd cylinder size since it was replaced.
I'm curious, How do you bend a Crowd cylinder rod?
Good question my friend.I loaned it out and that's how it came back.My kid toppled it into a creek bed awhile before but that didn't cause any damage.It worked fine so Im dumbfounded.Ill tell ya what tho.I wont be loaning anything else out again.Lesson learned.
Ok guys,here's the measurements I was able to get off of the bad cylinder with my caliper. The bore is 2.538",the rod diameter is 1.475",Fully extended is 52",fully retracted is 31.5"the cross tubes are 1" pins but the cross tubes on this cylinder were too big so they had to put spacers in to make up the diff. I had taken it in yesterday to try and get straightened out so I could get more accurate measurements but it cracked on the hyd press soooo,I pulled the rod out of the cylinder and made up a wooden stick the same length and included all the parts from the rod onto the stick copy.and wrote all the measurements down(piston,mounts,yada yada yada) and took the measurement extended and retracted.Allowing for the length the cap extended into the cylinder and such. I sure hope I did it right.I got a new quote from terramite for $400.00 now instead of $600.00.Im tempted to just say the **** with it and go that route.It'll cost more but I know Ill have the right part then.I dont really want to but....
DoubleO
Member
I'm no expert but 1" Pins don't sound right. Are they the same in the boom cylinder? Make sure that if you order from Terramite, you let them verify the correct pin size (maybe the rest of the dimensions also) or you might be in for more problems.
JonnyRed
Silver Member
I spent a bit of time trying to find aftermarket cylinders with the exact dimensions that Dart posted above and was unsuccessful. The biggest hurdle being the pin diameter of 1.25 with a 3" bore. If you got a bit creative you could go with the cylinders I am linking below by installing a bushing that reduced the pin size from 1.25" to 1.00" and adding sleeves or large washers to make up the slack in the rod end widths, you would need to grind off at least an 1/8 " of off each end of the base end. Simply cut the 1.25 pins off of your existing pin mounts and have 1" pins welded on in their place.
https://www.amazon.com/Mighty-Double-Acting-Hydraulic-Cylinder/dp/B009OM5BIG
1.25 To 1 x 1 Cylinder Pin Hole Bushing | Cylinder Pins & Bushings | Parts and Accessories for Hydraulic Cylinders | Hydraulic Cylinders | Hydraulics | www.surpluscenter.com
Speedy Metals 1-1/4" OD x 1.1" ID x .12" Wall Other Steel Round Tube
$139.00 for the cylinder
$30.00 or so for reducer bushing material
$20.00 for SAE M to NPT F adapters
$ unknown cost of 1" pins welded to your existing pin mounts
Just some food for thought, I may be way off in my thinking.
I would guess that the whole job is complete for under $300.00 and you now have a cylinder that is easily replacable versus a possible "one off" size.
https://www.amazon.com/Mighty-Double-Acting-Hydraulic-Cylinder/dp/B009OM5BIG
1.25 To 1 x 1 Cylinder Pin Hole Bushing | Cylinder Pins & Bushings | Parts and Accessories for Hydraulic Cylinders | Hydraulic Cylinders | Hydraulics | www.surpluscenter.com
Speedy Metals 1-1/4" OD x 1.1" ID x .12" Wall Other Steel Round Tube
$139.00 for the cylinder
$30.00 or so for reducer bushing material
$20.00 for SAE M to NPT F adapters
$ unknown cost of 1" pins welded to your existing pin mounts
Just some food for thought, I may be way off in my thinking.
I would guess that the whole job is complete for under $300.00 and you now have a cylinder that is easily replacable versus a possible "one off" size.
