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Bobcat T300 Hydrostatic Pump Failure. New Pump Did not Fix It?

HowIDidIt

42,231 views

Bobcat T300 is hard to steer. The steering levers are stiff and hard to control. A rebuilt Hydrostatic pump and rebuilt drive motors were installed but did not fix the problem.

https://www.fridayparts.com/hydraulic...

https://www.4tetradgroup.com

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20 Comments

@ThatBobcatGuy1973 2 years ago

Long live the T250/T300 and T320’s

@Newarkz 2 years ago

Really nice machine. T300s were some of Bobcats best machines. I am glad I had the chance to meet you and happy to see you are doing well. Cheers!!

@sassyslevin 2 years ago

I was thinking the same thing, that the rebuilt pump wasn't any good. Unfortunately I find that new and rebuilt parts are often bad when I replace them on vehicles. Sad these things happen. Hope that guy is happy to have his machine back. Thank you for the video!

@davidjackson4112 2 years ago

Just to give you heads up, I’ve used Friday Parts to find parts for my T300. Thanks for sharing another great tip and excellent video.

@terraintactic 2 years ago

Sending good vibes to Tetrad Group, we appreciate your videos!

@dirtrider383 2 years ago

That’s an incredibly clean machine

@brianreese9318 2 years ago

I started to follow you few days back and because of you I figured out our s173 bobcat mega fuse was bad boss pulled battery and shorted the battery which blew fuse no power to cab thanks so much

@endoftheworldasweknowit139 2 years ago

Wow, another great video. Always learn something new in each of your videos. Keep them coming. Thank you!

@05_sprcrw16 2 years ago

Great video for what its worth on those bobcat t300 and s300's there is a simple lift bracket you can make that balances the whole pump and engine assembly really well and makes install/removal a breeze. The print for it is in the bobcat service manual and worth the small amount of steel to make, if you do a fair amount of those large frame machines with the Kubota.

@gnuse60 2 years ago

Great videos always waiting for new ones

@petrafarla5439 2 years ago

Always enjoy watching your videos ,as a mechanic myself. A person can learn a lot from your videos . Thanks for posting these interesting videos

@schnellgelb1746 1 year ago

Thank you for all your Bobcat videos. I'm a reasonably capable mechanic but little experience with Bobcats. Diagnosis is the big problem for me. The R&R is easy with your videos. I just had a failure with my T320 that I use for Forestry.Both steel(yes steel) tracks started juddering after heavy work climbing steep terrain heavily loaded. Lost power to both tracks. Added some fluid,let it cool down overnight.Now it works fine - for a while. The simple diagnostic tool that helped is a laser/digital thermometer. When the problem recurs,stop,lift the cab and find the hottest part of the hydrostatic drive system. That will be the closest to the component that has failed.(Pump?). Don't forget to confirm that the hydraulically driven cooling fan runs ! Next step, do a pressure test. Thanks for all your Bobcat videos !

@commenter5469 2 years ago

On the mechanical ( trunion style) hydrostat - the feedback is your pressure. Any damage to the rotational group of pumps would reduce the highest pressure it can reach, so it will reduce the feedback and machines performance.

Something happens in the undercarriage, it’s just induces more pressure in the pumps required to do the job, when you counter steer.

On the pilot controlled machine, the higher feedback and higher charge pressure - means check valves not holding.

@molobo1 2 years ago

Thanks for the great vids. Big fan. What do you recommend for hyd oil for bobcat T-190? Bobcat fluid got so expensive.

@hey_youtubeim_back2159 1 year ago

It would be awesome if you had videos of the Bobcat e35 45 or 50 Series excavators. I would imagine a lot of what you explain in your videos pertains or replies to excavators as well. I'm telling you what your channel is like a Technical Institute on my phone. I love the content

@sdrammm696969 1 year ago

That's a score!

@olegstavkovy7046 2 years ago

Excellent video always enjoy the details of the repair, I have a T300 with the exact symptoms as you were describing in this video how can I test the charge pressure ?

@kylejohnson7464 2 years ago

Another great video . Can you disclose how many hours are on that machine?

@dane9175 2 years ago

Thanks!

@kevincosgrove4147 2 years ago

I actually have one that when you try to make a right turn it has a loud noise and almost stalls the machine I opened up the chain case and the disc brakes were destroyed cleaned everything out replaced the disc brakes and still the same look at the right drive motor and metal particle’s were coming out so I changed the drive motor now you can turn right but noise and grinding still there i have to swap the hydrostatic pump waiting on one from bobcat itself