Bobcat Hydrostatic Pump, Everything you need to know.

We tear down a Bobcat Hydrostatic manual drive pump, identify all the components and inspect for damage.
www.4tetradgro...
Tools We Use:
Hydraulic Cylinder Spanner amzn.to/3SAlHYw
Another Spanner Option amzn.to/3LR1JFb
Hydraulic Seal Clasper www.4tetradgro...
Hydraulic Seal Stretcher www.4tetradgro...
Injector Block Off Cap www.4tetradgro...
Bobcat Fuel Filter Bowl Wrench www.4tetradgro...
Wrench Extender amzn.to/3Yt2yvl
Spring Compressor Tool amzn.to/4fA030n
Hydraulic Seal Installation Kit amzn.to/3Yrs6sV
Hand Impact Tool amzn.to/3Sz0yOk
Common Rail Fuel Injector Test Kit amzn.to/4dasD6T
Injector Leak Back Test Kit amzn.to/46Btf3i
Electrical Supplies:
Milwaukee Solder Iron amzn.to/4dpp0cY
Tesa Harness Tape amzn.to/3SAdG60
X Fasten Harness Tape amzn.to/4cbItNA
Non-Insulated Terminals amzn.to/4dp18XH
Short / Open Tester Power Probe amzn.to/3WRdrpu
Power Probe Master Kit amzn.to/3WPETUR
Shop Supplies:
Gloveworks Nitrile Gloves amzn.to/3WADdwW
Oil Absorbent Pads amzn.to/4ckYq48
Absorbent Pads amzn.to/3WOX64P
Brake Cleaner (Its Really Good) amzn.to/3yse3sA

[@nathandemoranville7912]

I always enjoy watching and learning from your content. I work for a rental fleet that’s Primarily Bobcat equipment, I’ve referenced serval of your videos while diaging equipment. Just wanted to say thanks and I’m always looking forward to the next video!

[@jl5728]

Same when I used to work at Synergy equipment

[@cheebiewonder5817]

Great video as usual. You are the go to guy! I noticed in the video where you went thru the pressure relief/replenishing valves that large, top most o-ring was missing. Are these not necessary? With it on it seems impossible to get the valve back in! The pump is still in my 883 and it was miserable getting it out also! Im hoping this bigger oring is just for keeping dirt out.

[@vanceplace1349]

I love how these companies work, they make it too expensive to fix your own bought and owned property yourself. Pump needs a few parts and you might as well buy a whole new pump. Ridiculous. Someday the only people who will be able to afford equipment at all will be huge companies.

[@MHolt3573]

I work at a lawn mower shop, we run into this with the hydrostatic drives on them. The manufacturer tells you to tear it down amd see what's wrong with it but then you can't get parts to fix it, so you have to replace the unit.

[@mitchelldake7203]

In fairness, bobcat doesn't have a lot of say in this. Sauer Dan Foss makes the pump, Bobcat is just buying complete units themselves. If Sauer won't sell individual parts, Bobcat can't sell them either.

[@philliphall5198]

It’s all ready that way to put small businesses out of business 😢😢😢

[@mannycalavera121]

​@@MHolt3573 benefits being a machinist, make my own

[@destro513]

So i dont have these parts in my hand but as a toolmaker I would hope that some, maybe all of these wear parts could be made. Some tools beyond a mill and lathe you may need are an id od grinder and tools to measure a high resolution of tolerance. You may also need to farm out some edm or wire work for the hardened parts and heat treat will need to be outfitted or farmed out

[@wadebeauchaine1297]

Lucky me, I got to rebuild my Hydrostatic Pump over the winter of 2022-2023 off my T320. The right side was trashed from running with no oil due to a blown O-ring on the gear pump face. Expensive rebuild, but still cheaper than buying a new or rebuilt pump. So while this video came out after I was done, this was exactly what you do.

[@brandnand4577]

What wss the symptoms of the blown oring

[@wadebeauchaine1297]

First clue was things started to not work properly then the smoke as the oil was hitting the exhaust was everywhere. I had to throughly wash the engine bay before I found the leak.

[@erikpacheco9610]

Very helpful and educational video 2👍🏼👍🏼

[@scironworks]

Please do a video on the M46 servo assist hydrostatic pump. A bunch of us still rock the older iron like the 873 C and F series

[@philliphall5198]

I’ve put silicone over the high pressure relief valve plug to keep it from rusting 😊😊

[@dubvmountaineer]

I have hydraulic fluid pushing out of a green cap on the drivers right side of the machine. Can’t seem to find what this pump is called and a video on replacing it/rebuilding it. I have a picture but can’t send it on here.

[@zoharflax6363]

Hi, I really appreciate your videos. I have a Bobcat 753 that I got used and it looks like it rolled down a mountain but functions relatively. One issue is that the hydraulics are choppy, like when turning it is not smooth, but jerky, also sometimes the auxiliary buttons stick. Is a pump rebuild like in this video what you would recommend as a starting point? Do you have any other advice to make it run smoothly? Thanks so much if you respond!

[@williamdowey3117]

Would like to see a tear down of an R series manual control machine. Haven’t had to do one yet. Just had to do one on an SJC R series machine. Assume it’s not too much different.

[@scothubbard5323]

HAVE YOU EVER REBUILT ONE OF THOSE? CAN THEY BE REBUILT OR IS IT A PUMP YOU SIMPLY REPLACE WHEN IT GIVES TEOUBLE?

[@wadebeauchaine1297]

Depending on how bad the damage is, they can be rebuilt if the parts are available. I waited 3 months on back ordered parts. This wasn't a problem for me as mine is not a business machine.

[@Mickjd82]

Brilliant videos i have a 553 2006 model its split the casting on the hydraulic pump tonight i thought id blew a pipe under the seat but thats whats happened why would this happen has me totally confused

[@TYavuncu1]

Sir where are you located at? I love to have an expert mechanic for my bobcat for repairs. I am at Atlanta. And how do I find independent people like you in my area? It would be great help for your subscribers in desperate need of getting out of the chokehold of dealers. Your response very much appreciated. Another suggestion is there is really no real guidance online for repair places, people and prices for reference. Your channel would get a great boost if you can provide that.

[@TheStevo420]

Surgery here guys so clean

[@timbo1961]

Useful!

[@onemessedupfarmer]

Good content but in reality those slippers on the pistons could be lapped, same with the pistons and the cylinder and the valve plate. Effectively putting the pump back to good working condition for far less than a rebuild pump.

[@frankk9742]

I have a small bobcat loader S70 it seems to be very slow lifting or tilting the bucket and also weak struggles to lift half a bucket of dirt, however driving forward or backward it is strong and quick no issues at all, would this be a problem with the pump or maybe hydraulic control valve looking for some help thanks Frank

[@wadebeauchaine1297]

The problem could be in the gear pump and related relief valves or in the spool valve . Bit since it's both lift and tilt I would check the output pressure of the gear pump.

[@granthutter5787]

Well timed video for me as my right side drive is seemingly losing strength. I can direct my mechanic to this video as a baseline; and possibly have him at least check the Hydraulic Pressure relief valves and for wear on the valve plate and swash plates. S185

[@wadebeauchaine1297]

Or the brake isn't releasing fully on that side.

[@andremachadoabreu2601]

Parabéns pelo trabalho 🇧🇷

[@ShoetubeTV]

I have that same unit and it leaks from the Bottom “where you can see of course “ when it warms up. Everything works fine , I just keeps adding fluid. Getting bad. What’s the first thing I should look at? With a scope, it looks like it’s coming from the very center of the unit, between the right and left pump. Any advice would be awesome love the video, thanks

[@wadebeauchaine1297]

Sounds like the o-ring is leaking. The only way to fix it is removing the engine/pump assembly.

[@gregrupar135]

Looks like I’m leaking out of the top of the left side of the machine pump. Can I just replace the seal while in the machine?

[@dane9175]

Thanks!

[@tetradgroup]

Thanks Again!

[@lukemorley7481]

Very good

[@TheZigZiggy]

Can you flip that thin swash plate and use the other side?

[@kenh9508]

Thats what I was wondering also.

[@Ash-uy6ii]

Me too

[@wadebeauchaine1297]

I would say it depends on how badly worn the other side is. Minor damage you could probably get away with flipping it. Mine was totaled, so it had to be replaced.

[@scothubbard5323]

If these pumps drive your wheels? What supplies pressure to your axillary lines? Example., What pumps pressure to spin the blades of a rotary cutter / Brush cutter? (Bobcat 863G)

[@Ash-uy6ii]

There it’s a 3er pump

[@wadebeauchaine1297]

The gear pump on the outboard end of the hydrostatic pump

[@bjarnevarme9830]

Tack!

[@tetradgroup]

Thanks so much for the support!

[@lukemorley7481]

Very smart

[@zetamale7952]

Nice instruction video. Subbed. Bobcat 753 C series here. Personal use, not business.

[@tetradgroup]

Thanks for the sub!

[@MelchorMolina-dm6lm]

I have a Bobcat T190 when I open the 4 in 1 bucket it starts to close by itself what could be the problem

[@ellkir1521]

Thank you so much for a excellent video. I have an old JD 125H I'm about to tear into. I'm worried about parts for it because it's so old. If the trust plate washer is worn on one side, can it be flipped to the other side if no parts available for it?

[@andrewarmstrong9194]

Did you get an answer on flipping it, or did you do it to see what happened? I'm thinking the same thing

[@Ash-uy6ii]

I have the same question

[@Theworsthunter]

Can the pump shaft be removed while still attached in the machine? I recently changed the shaft seal in my t300 while everything still in the machine. After getting it all back together and running it, 3 hours later it started leaking again. I’m wondering if my shaft where the seal goes is possibly worn down causing an oem seal to not actually seal

[@wadebeauchaine1297]

Short answer would be no. Pump has to come apart.

[@michaelduran8392]

I am getting a mid tone whining sound from my hydrostatic pump could this mean there is air in the line? I have a Bobcat 440b

[@SteveXNYC]

That look like a Hydraulic travis/travel drive.

[@purushothprabhu8999]

One doubt how to check hydrostatic pump pressure pls help me

[@philliphall5198]

They don’t want us rebuilding anything these days 😢😢😢

[@andrewarmstrong9194]

When you have to watch a bobcat tech tear apart pumps and motors to see how they work and come apart to try and figure out how to fix a jcb( which the pumps and motors look almost identical btw) because there is no videos on a jcb

[@sjair6526]

Is there a way to fill or prime the pump after install so it doesn’t start dry?

[@jason-things_to_do]

Ya, the cartridge filter usually behind the seat has a large rubber hose to the pump.Remove the house going to the pump and dump a couple of quarts and you should be good.

[@bignewtv]

Can someone please answer a question for me? I took the tandem hydrostatic pump off my 1993 bobcat 853 to have it looked at because it was leaking really bad at a factory seam on the front left side. I dropped it off an all I wanted them to do is tell me if was fixable or not. They stripped it all the way down to the very last bolt without my permission took them about an hour to do so, at 150 an hour. Now they wanna charge 600 to 800 to put it all back together (WITHOUT FIXING IT) Now I'm stuck with 3 full boxes of hydraulic pump parts that I don't know W.T.F. to do with. or even where to start to put it back together. I'm pissed as hell they automatically assumed I was gonna have them fix it. Any suggestions about what I should do cause it will cost at least 5k for a remanded one. I don't have that kind of money. Should I sue them in small claims court? All I want them to do is fix it and put it all back together at no cost to me. I don't want to get any money from them. I just want it put together an that would be good enough for me. They also told me it was done when I called. An fixed on the phone when it wasn't. So now I'm stuck with a bobcat that has no motor in it because I had to pull it all the way out just to get to the pump. So I have no bobcat an 3 boxes of hydraulic parts. Did they really have to tare it all the way done like that? Or are they being ASSHOLES? feels like entrapment...

[@wadebeauchaine1297]

I will not advise you on legal issues with that. But on the mechanical issue they probably tore it down completely to see what all may have to be done for them to rebuild it. I took mine apart and reassembled it with the Bobcat manual for my machine and I had never seen a hydrostatic pump before. I 3rd party sourced the bearings but purchased seals and parts from bobcat.

[@scothubbard5323]

LOL, SMH... "All I want them to do is fix it and put it all back together at no cost to me." Please explain why you feel they should do that? It sounds a lot like you're trying to get them to fix it for free??? "you want them to fix it at no cost to you!!! " I'm sure you do! everyone would like that! not happening though. They wouldn't be in business very long if they worked that way. I wanted my surgeon to fix my neck at no cost to me! He didn't do it though, He charged me a little over $96,000 to fix me and put me back together!

[@muchemimu]

Where in Kenya do I get parts?

[@frankcooper6911]

👍

[@TheStevo420]

How can I become your apprentice?, will move from Canada

[@gerenciarecrutamento]

Pode me passar en português

[@jimmycorona7217]

How to remove it??

[@ИсаАхаев-д5р]

Спасибо большое.если можно зделай видео про хайфловый насосс