Bobcat Drive Belt and Tensioner for 2014 and up Loaders with D24 and D34 Doosan engine.

How to change and adjust the hydraulic drive belt and tensioner on Bobcat loaders with the Doosan D24 and D34 engines. If you have a machine coding low hydraulic charge pressure and you have no hydraulic functions, check the drive belt.
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[@schnellgelb1746]

Great videos on fixing Bobcats -thank you. Just a note to those unfortunate T320 owners who have a completely different tensioner - a very long spring like a strut spring on a car. Problem- There is no hole for a ratchet in the tensioner relieve the tension on the belt. There is no convenient place I could find for a pry bar.There is a very small internal hex on the tensioner pulley but it seems too weak to withstand the force of a long breaker bar on a tiny Allen socket. The fastener on the lower end of the spring is a dowel with a circlip !! The bolt at the top of the spring is a tiny 1/4 internal hex that was far too tight for a 1/4 drive ratchet. I eventually used lots of liquid wrench and a giant Crescent wrench to start it .Then removed with a 1/4" angle impact and a pry bar. What a fight ! Now to get the new belt on. The part number for mine is 7138985. It is 2" wide,5 grooves and 72-1/2" long. Good Luck and I hope you find an easier way to do this job.The tensioner in this video looks way easier.

[@Lee-tj8bn]

Great video, man... no fluff, just what you need to know. Wish everyone did 'em like you. Thanks!!!

[@nealvaughn2340]

Just popped my belt on a 2014 T550. You just saved my life man. Great video and excellent presentation.

[@jamesstefanson652]

Thank you kindly. Went to look at a t650 and saw the tensioner bouncing back n forth and also bogged going into high speed, this was the exact video I was hoping to find!

[@shawncarmody8874]

Excellent video! Everything that's needed to know for the repair you covered perfectly. Good job👍

[@MrJesseforeman555]

Excellent video bud just got a new T770 and this is just what I need

[@tonygonzales1122]

Man ok! First time DIY'r! If it wasn't for your video I couldn't have done this! So thank you! It took me about 5 hours start to finish! That includes picking up the part. Issues I ran into. Washer for pulley goes on both insides lmao. My pulley was rubbing the arm at first and couldn't figure it out. But eventually did. Issue #2 with the motor inside it was almost Impossible to push the pulley tensioner mechanism back far enough to get the plate on. I almost quit. But I put the plate on and kept trying to line it up to get the arm to come through the tentionior plate if that makes since. Thank you thank you thank you! You are huge help to the world. How can I tip you.

[@tommyjarrell9788]

Great tutorial on how to change the drive belt

[@dgb5820]

You make the best information videos well done mate

[@arnoldcastillo7495]

Excellent video man!! You just make my day.. thanks a lot. Otherwise I will be paying thousand of dollars for a simple fix.. you are the man!!👍👍👍

[@advancednutritioninc908]

well done! clear and easy to understand.

[@scottmcmunn5369]

Thanks for adding the tourqu specs

[@dgb5820]

Fantastic video mate

[@checram6331]

Hi you didn’t mention the belt part numbers. That would be great information to know. If you could post thank you love your videos very detailed. You have better information than others keep up the good work

[@tommyk1073]

Great video!!

[@tonygonzales1122]

You are the man! Im gunna try and tackle my issue.

[@tetradgroup]

No problem

[@mollydoyle2455]

THANK YOU MISTER YOURE MY HERO

[@marshallbell9354]

Another two videos to the rescue! Changed out my tensioner pulley tonight. Thanks for all the fantastic content!! I'm inferring from a more recent video that b*bcat is trying limit your ability to make these videos - if that's true, what a shame as I think your content only improves the maintainability of their equipment and increases the brand appeal (at least for me)

[@pedal2dametal686]

100% agree

[@user-qc6gh1ep5j]

Thank you very much. We had a belt consistently coming loose and I figured I wasn't tensioning the belt correctly, yep.

[@rmejrstonemt]

Excellent and thank you!

[@neweracontracting8229]

You are a badass for this vid thanks man

[@baseball72]

Great help. Thanks alot!!

[@tetradgroup]

Glad it helped!

[@mikeboccasini4166]

Love the no baloney approach to your teaching method. Thank you for another terrific video. One question, I read about a lot of guys that will run their machines without brakes, if you are going down hill and this belt breaks, do you lose the ability to stop without brakes?

[@tetradgroup]

Excellent question, if the belt breaks you just lose hydraulic flow, if the sticks are returned to neutral the oil in the motors has nowhere to go and the machine should come to a stop. Some oil can leak thru the motor and allow it to slowly roll, hence the need for a brake.

[@victorhernandez769]

Thank you for the video gracias

[@omarcampos9461]

Great video man. What tool do you use if you have a slot? Not the 1/2 drive square hole? On the tensioner?

[@josemondragon7611]

Great Video, my issue is I have a bobcat T-190, and the hyd charge pressure in shut down mode. I started the engine and noticed the flywheel doing it job, but the hydraulic pump wasn't moving, the driver belt was not moving. then it moved for second, then the engine shut down. can you help me with my issue.

[@dorelpolo5535]

How do I adjust a used belt? I do have the same setup on my 2015 s650. It makes ratheling noise. Look like the tensioner slacks up and down creating noise. I think the belt is not adjusted properly or the tensioner is bad. Any advice will be appreciated. Thank you. Dorel

[@tetradgroup]

Take all the pressure off tensioner and check the idler pulley and make sure bearings are good, if it's good adjust like a new one

[@70below]

My T550 drive belt started smoking like a freight train, of course my luck 7257359 seems to be unobtanium locally, and not many selling it online even. I couldn't even find a temporary aftermarket cross to get back operating. Looks like I better order 2. I wonder if this is just an uncommon belt?

[@summervlogs828]

What tool did you use to remove the motor mount on the left side my view would be sitting inside the cab. On the t190 it’s a square bolt what tool would I use to remove that

[@tetradgroup]

That's actually a nut and is square so it will not spin. You remove the bolt from underneath with a 3/4.

[@hightechredneck_0566]

Super helpful videos. Thank you! Have you ever seen the sleeve bent? My brother jacked the tensioner up with a jack and we think it bent the tensioner sleeve that the tensioner slides onto.

[@tetradgroup]

I can't say I have ever seen one bent but I have had to replace them due to damage or wear. It is replaceable but can be difficult because it's press fit.

[@hightechredneck_0566]

@@tetradgroup thanks so much for the reply. It looks difficult, if not impossible to get the sleeve out of there with the engine still in the machine.

[@jamesmontes4438]

Hey man. Need some help with some torque spec for Bobcat T650 2018. Belt tensioner pully bolt and counterweight small bolt to arm. Does anyone have any torque specs?

[@rmejrstonemt]

What gear wrenches and torque wrenches do you recommend?

[@4ggranit]

My bobcat t590 threw and broke 3 of the 4 belts and had one left that was slipping providing no hydraulics. I replaced all four with single belts because that's how it came it didn't come with one and this is the first time I've replaced them. I put four new ones on it and two different times it through all four belts off. Do you have any ideas on what's going on? Thank you for the video it's perfect

[@tetradgroup]

There is only one belt, sounds like the pulley is siezed and shredded the belts. I would install a new tensioner arm, tensioner pulley, and new belt from Bobcat

[@billwhite9782]

Great Video Thanks I have a 2015 T590 and getting a M2302 code . If I keep trying to start it does after several tries . After looking at the manual seems like to me the signal comes from the starter R terminal is that correct ? Thanks

[@tetradgroup]

Yes that is the signal wire from the starter. First thing to try is swapping the start relay with another relay in the fuse panel.

[@billwhite9782]

@@tetradgroup Thanks so much for your reply . Hope you are having a great day . I have swapped relay and still the same . I have to cycle it several times and it starts , every time it starts beeps 3 times and shows M2302 After a few tries it stays running with no code .

[@billwhite9782]

Got it figured out . Removed wire from R terminal on starter and code went away . Starter was not disengaging quickly enough because it was worn . Put some lube on gear shaft and is working . Will replace starter .Thanks PS I enjoy your videos very much .

[@Jamestreeman]

Do you recommend changing these as they break or by the hours. I have broken them at 500 hours and I have had them go 2000 hours

[@tetradgroup]

Bobcat does not have a specific recommendation on when the drive belt should be changed however I personally recommend replacing at 1000 hours to minimize downtime. Belt and tensioner should be inspected and adjusted every 250 hours.

[@3Beehivesto300]

I notice that your videos have a lot of these motors. I don’t see much for the kuboda?

[@odgbdiaz2]

Great video i need to replace my tensioner do you happen to have any videos on that?

[@tetradgroup]

I don't have a full tensioner replacement video yet but will very soon.

[@williamwilson1706]

This video has helped me a lot.. I see that I need to change the tensioner... Is it complicated?

[@519trav]

Awesome video. Do you have a video of how to change the actual pulley tensioner?

[@tetradgroup]

Thanks, I don't have one of changing the tensioner yet but I should. Seems like I never have my camera with me when I do one.

[@519trav]

Thank you. Fairly easy to change?

[@tetradgroup]

@@519trav it's not bad, depends on serial number but sometimes hard to get main bolt out due to hitting tube lines and wiring harness on left side, just pry them out of the way. The spring can be tricky to get back under the roll pin when putting back together.

[@213eddy]

I HAVE THE t590 and my belt some how slid to the left 2 groove out of the 4

[@tetradgroup]

I would guess tensioner to loose or bad bearings in tensioner wheel.

[@jamesreddan8200]

Could u do a video of drive belt replacement on a 763

[@tetradgroup]

Absolutely, thanks for the suggestion. I'll have it up next week

[@engrchk]

Is it possible to disassemble the tensioner and replace the bearings?

[@tetradgroup]

It is possible, however I highly recommend just replacing the tensioner wheel assembly.

[@charlespenner1755]

Fuckin mint this helped soooo much

[@tetradgroup]

So glad it helped! Thanks for watching!

[@213eddy]

Hey so do I need to come back later and re torque the new belt or just stays at 40 pounds Thanks great video

[@tetradgroup]

Only the initial torque is necessary, spring will take over and it will be fine.

[@213eddy]

@@tetradgroup hey what about the actual tensioner when I be put the new one do I need to put a certain torque on it??

[@donaldschacht7719]

I really enjoy your videos, I have 10 Bobcats. On a T650 control valve there is a poppet and spring reference #’s 19 & 31 that are NLA per Bobcat technical information bulletin #463 can you tell us how to find out about this bulletin please, I can’t find it anywhere and I want to just remove them and throw them away.

[@tetradgroup]

I have a video that tells you to remove the parts and throw them away, spring and poppet not needed.

[@kennygroseclose8960]

Had a Question , This happened on The 770 I’m running Machine just Turned 500 Hours , Is this very Common Failure ? Basically man Want to make sure Its nothing im doing operating it to cause that belt failure ?

[@tetradgroup]

It's is a common failure, the harder you work it the more stress on the belt. The belt is the weak link between the engine and pump. All driven hydraulic systems have a weak link, could be a belt or a coupler but something needs to give before the pump or engine itself is damaged. I've seen machines run 3000 hours on the original belt and I've seen plenty of machines break a belt less than 1000 hours. Make sure the tensioner wheel bearings are good because the tensioner is also a cause of belt failure.

[@kennygroseclose8960]

Thank you Appreciate it

[@jessesutt854]

How much of a pain is it to pull one of these d34 engines out?

[@keithknudson908]

Great video. I took my belt off and see the tensioner pulley wobbles so assume bearings are shot. That is probably why the belt broke. How do I remove the tensioner pulley? There seems to be a lot of spring pressure so not sure I want to try to remove the whole assembly.

[@tetradgroup]

You will have to remove me a whole assembly. It can be a little tricky but not bad. Remove the center bolt and the tensioner lock down bolt and use a pry bar to pry it off. You shouldn't need a complete tensioner assembly just the roller hopefully. Pay attention to where the spring goes under a dowel pin on the belt housing itself. when you put it back together you'll have to use a pry bar to get that spring back under the dowel pin. Let me know if you have any issues and I'll try to walk you through it

[@mhazel9551]

Currently having the same problem and this is the only video on the internet with the same type of setup as my skid. Can you do a short video on removing the assembly?

[@tetradgroup]

@@mhazel9551 I definitely will, should have covered in this video, sorry about that

[@bryanriley1683]

Hey how do i get that tensioner sleeve out of the block? Thanks

[@tetradgroup]

Several options, weld a nut to it and use threaded rod as a pusher or use a air hammer with chisel bit

[@bryanriley1683]

@tetradgroup need to heat up the block iam assuming? And to put new one in can I seat it with the main bolt?

[@dalynborysiuk9916]

Does the tensioner pully spin?

[@tetradgroup]

Yes it does

[@xephael3485]

You must take a shower before filming all these videos 👍😂😜