Bobcat Control Valve Leaking From Lift Spool, Why it leaks and how to fix it.

[@chrisowen9378]

Thanks wish you were around 20 years ago no one wanted to show me anyting. Made lots of mistakes but I'm a better man for it today !!!

[@endoftheworldasweknowit139]

Thank you for showing us (IN DETAIL) many of the important factors in doing your own repairs. THANK YOU!

[@watekacdc]

Huge help, thanks! After watching the video, I discovered that not all Bobcat lift spools will have on o-ring to remove after you get the plug out. My 853 from 1993 did not come with a o-ring in front of the plastic plug, and at first I thought I was either blind or there was a screwup at the factory. In looking at the parts manual for my model, the old plug was part number 6592752, and the parts manual picture does not show an o-ring. The final clue was that 6592752 has been superseded by 6596807 and the parts manual says to order o-ring 54K-20002 with the new part number. The plugs look different as well. The old plug did not have a male protrusion to hold the oring, which the new plug does have. Again, the video was a huge help - thanks.

[@tisch1235]

Thank you for this comment. Running into the same exact thing

[@BD-qq4fn]

Just resealed our Bobcat 753 Valve’s (Melroe, square lights)…..your posts were incredibly helpful! Getting those ball bearings back in was a NIGHTMARE (thank god I had a bunch of them). The plug trick worked like a charm (mistake I made was torquing down the set screw to much…..pushed the oring into the spool). Thank you again!

[@rss608]

Slicker than snot!!!! used a 7/64" ball head exactly as suggested, came right out... O-ring: black electrical tape over the holes but one, 120psi and the O-ring popped right out, done before lunch... a little grease and re-install... very cool... used some old small skinny HF cheapo lockjoint pliers, cut a grove with grinder in the tip, grease to hold ball in place and went in 2nd attempt.... I didn't even loose my balls.... here is the bad news, on my 753G 01 no way to get the spools out with out loosening the entire valve body and tipping it forward to about 30 degrees so there was enough clearance to get the extra long spool valves on my unit. the longest spool was 14" long OD..... I had to remove the fuel hose fill top and fold the fuel fill hose down underneath the hydraulic valve body..... thank you so much for these vid's.....

[@mies-bvd]

The thrick with the heater to remove the plastic plug is a lifesaver! 🎉

[@georgepranis5183]

Excellent tip to get the palstic plug out!

[@jessegeorge3793]

I just recently got a t750 and your videos have been a huge help, thanks for taking the time to teach us!!

[@TC-dz5df]

You give a lot of people hope working on these machines! I enjoy your informative and educational videos, they have really helped me a ton! Not sure if this has been asked but, what will cause the lift cylinders to drift after lifting the seat bar (when the lights go out on the panel)?

[@randyscrafts8575]

👍 Perfect. I have to do the lift and tilt seals (Bobcat 753) and I'm glad you pointed out this seal also. Your videos are very helpful and easy to follow instructons. Ordered seal kit yesterday. Last year it was leaking pretty good. This year it's worse.

[@annmarie511]

looking for parts to rebuild spool on a 331-bobcat excavator nice video !!!

[@terrylundquist2646]

Thanks again for taking the time to share your knowledge.👍

[@ΓιαννηςΚυριτσης-τ6ν]

εξαιρετικες πληροφορίες απο το βιντεο. πάρα πολλυ χρησιμο.

[@tetradgroup]

Ευχαριστώ πολύ

[@juanbarron6965]

This is a long shot but would you happen to have that video of the rebuilt of the control valve that you mentioned in this video, thanks for your help

[@shawnjackson9944]

I just did this repair last week on a 753, nice trick heating the Allen wrench, I drilled mine out. His way looks much easier😂

[@stevenalonge326]

What size allen key did you use to melt the plastic plug?

[@patrickherbst960]

Is there any way to adjust the pressure relief on the hydraulic pump on a t250

[@tetradgroup]

Yes, the pressure relief is on the bottom of the main control valve.

[@patrickherbst960]

@@tetradgroup would I be able to shim it or is there another way to increase the pressure

[@tetradgroup]

@@patrickherbst960 you would shim charge relief in hydrostatic pump for charge pressure, main relief in control valve is adjustable, loosen jam nut and use allen head to adjust, in to increase, out to decrease. Really should not have to adjust relief unless a new pump has been installed or a rebuild has been done. Have you checked the pressure yet?

[@patrickherbst960]

@@tetradgroup I get charge pressure alarm in the warmer temps and it shows around 300 psi but in the cold temps every thing is fine

[@patrickherbst960]

@@tetradgroup I have not brought it in to have it checked yet I was hoping that I could adjust the pressure my self and save some money🤷🏼‍♂️

[@RCAFpolarexpress]

Thank You Very Kindly for your OUTSTANDING Informative video Sire Cheers

[@burtlade1705]

Good job! Thanks for sharing that information.

[@streetglide187]

what would cause the lift to drop a little before going up. i have a bobcat s160 that drops when you hit the lift pedal if you barely press it but starts to go up if you press it harder.

[@jimmymcglamery4690]

Your videos are great help!!!! I have a 2014 Bobcat T770….Forward, reverse, turn all work great. The bucket tilts up n down fine bucket but is very so to lift….if you put any weight on the bucket it will not lift. We replaced seals in the lift arms thinking it was bypassing internally but did not help…..I’ve been told Joe this could be the release valve or lift control solenoid…..help please!!!

[@tetradgroup]

Id start by checking main system pressure at aux couplers. Could be bad gear pump

[@Rprecision]

Great information, thank you!

[@gregschmidt3620]

Great video, wondering if you can tell me what the correct orientation of the green seals ?? Does the small taper on the seal face toward the spool valve or the cap ? Thanks

[@tetradgroup]

Small end toward cap

[@gregschmidt3620]

Awesome. Great video, you helped me clarify the leak on the lift spool.

[@luigi90728]

Hello do know if a 2014 t550 has that seal, thanks.

[@jayrenner5055]

Can you remove the control valve lift spool while it’s in the machine or do you need to remove the whole assembly?

[@Watchout1010]

Dealer said spool seal lips go inward toward the spool,you put them on backwards according to dealer instructions?

[@justatool]

Do you have a part no for the two items?

[@jerryblankenship9908]

Bobcat 743B the spool with detent balls, the main shaft has the treaded hoie in the end, &my detent has 4 of them , Idon't now what to do

[@tetradgroup]

For more a more individual and detailed response, please visit our website to contact us. www.4tetradgroup.com

[@TheOldMachines]

My 853H has a new hydraulic pump. Drives and tilts fine (including lifting the machine). Loses lift power about a few minutes of running. Could it be the spool valve leaking by or something else in the system?

[@davychurch2792]

Excellent video

[@yeisonorozco6407]

Thank you so much very helpful.

[@johnjames7780]

Hi my bobcat 753 just started to labour for no reason and cut out it will start but stops straight away I was using a 4 in one bucket at the time can you help Regards John

[@eliast4780]

I have problem with a backhoe attachment bobcat 8811 When I'm using it , it makes a hissing noise I think it comes out of the valve spool body and one of the lines starts getting hot and if I use it for more than 10 minutes ,the oil gets so hot that it " kooks" seals from quick coupler and leaks hot oil... if you can help will appreciate . Thank you

[@aggalva238]

Hi I have a bobcat 773g and the lift arms goes down I already replaced the cylinders seals thanks to your video but still goes down the tilt Is ok the bucket stay in position any thoughts

[@tetradgroup]

Will they drop with machine turned off? You can schedule an appointment to talk at www,4tetradgroup.com

[@eddygoodwin7089]

Have you pulled these valves on a John Deere 240 skid steer? I have one ands it been a real bear to get out

[@mikebraaten170]

Great video! You wouldn’t happen to have the part number for the o-ring?

[@ericconstantine1]

54K20002

[@jerryblankenship9908]

My old Bobcat 843B Ireplaced the seals It looks like it is leaking where the control valve is bolted to the body , I need help

[@LarryHavel]

How many spools are in the control valve?

[@vilimyllykangas1027]

Hey! Ive got a bobcat L28 problem is that the loader falls down slowly even with the engine running, could it be a leaky valve or what??

[@tetradgroup]

I would test the cylinder first by capping it off and see if it will holld.

[@aaronbrewster9113]

Thanks So Much! God Bless.

[@wolfhillfarms1007]

Would this be the same as a 743?

[@johnjames2800]

Can I remove the spool the same way in a 753?

[@tetradgroup]

Yes you can

[@justinwolfe7061]

Thank you so much fir your video!! I have learned a lot watching everything you do. Just curious though how much different it is on my bobcat 773 g hand controls only… I was told there is no detent balls and spring. My spools are leaking. I’m just not sure how much different the process is on one with hand controls only ?

[@tetradgroup]

If you're hand only in the control valve is run by actuators you will not have the spring and balls. The actuator will hold the spool on the float position. Your spool will still be cross drilled like this one but other than that fairly easy job

[@justinwolfe7061]

Thank you so much!! Is it basically the same way to disassemble as the video of you disassembling the bobcat 773 spools with the foot controls ls? Just easier since there’s no detent balls and spring that you have to worry about falling off when removing the spools.

[@justinwolfe7061]

Or is there separate bolts that have to be removed to remove the actuators before removing the spools

[@tetradgroup]

@@justinwolfe7061 I have an actuator tips and tricks video as well that might help with removal of the actuators.

[@justinwolfe7061]

Okay sounds good I’ll take a look and see if I can find it. Thank you!!!!!

[@jimkline8080]

im went looking for a rebuilt 2203 from my dealer that you mentioned in a previous video and apparently there arent any available im wondering if this is a permanent situation or temporary im afraid to get one from a local rebuilder it may have been rebuilt many many times and of poor quality parts and ultimately taking out a better motor than putting in . Any info or suggestions?

[@anthonycecil8299]

You are great :-) an inspiration

[@chrisjennings5008]

I have a bobcat t300 and I am pretty sure this is what is leaking how ever rhe cap that covers the end of the spool has a hole right in the middle of it and fluid was coming out of it ...does this sound like the same deal.....

[@tetradgroup]

It does sound like the same issue, no oil should be under the cap so either spool seal or this plug in the lift spool, replace both and you should be good

[@pingobruto8893]

Hi i need The wiring diagram of a s150 2010 do you can help me here show UP a codé L7404

[@johnjames7780]

I replaced lift spool seals including small O ring on my 753 twice and I still haven’t fixed it what could it be?

[@tetradgroup]

Is the seal retainer installed correctly?

[@johnjames7780]

@@tetradgroup the seal and retainer are all assembled on the spool with the detent cap.. how would the retainer be fitted wrong?

[@johnjames7780]

I found the problem it wasn’t the lift spool it was a seal on the tilt spool the lip on the seal was damaged.

[@emiliocasarez407]

Hey man i know his is a long shot But I'm having trouble with a Bobcat T-650. the machine runs and drives But as soon as you go to pick up a load we cant get to lift nor tilt the load. We replaced the Hydro pump and I've checked every solenoid to make sure I'm getting the correct resistance on it. I've replaced the main relief valve thinking it was stuck open but replaced and the problem still hasn't gone away Just looking for some insight on the problem. Could a leaking spool valve seal cause this ?

[@tetradgroup]

Not that bad I wouldn't think. We could talk more about it if you want to schedule an appointment thru www.4tetradgroup.com

[@chrisjennings5008]

My t3oo only has one seal on the lift spool does anyone know if the tilt spool is different... maybe it's the one with the plug and o ring

[@tetradgroup]

The lift spool has the plug and o-ring and you should have a spool seal on either side of the spool (total of 2).

[@tetradgroup]

For personalized assistance, please visit www.4tetradgroup.com

[@andrewphillips9798]

I've just resealed my 773 Spools as one was leaking, using your videos as a guide. They were a great help. I bought the seals from Bobcat but they are the black ones, not green like the ones you are using. They said that they only supply the black ones now so thats what I installed. Leak has all stopped now, but I'm finding that both the tilt and lift controls don't alway find there neutral position properly, and if I'm not careful to position them back with my foot, can keep creeping. The detent is working fine once I move the pedal to neutral. Its like the seals are binding too muck onto the actual spool valve. What do you think? I've now ordered green seals from the states but have yet to fit them.

[@tetradgroup]

Not sure but let me know how it does after replacing the seals.

[@andrewphillips9798]

@@tetradgroup so I've changed the seals to the green ones and the spools now return to neutral every time. I'll be contacting my local Bobcat dealer and telling them about this and see what they say. The green ones felt a little softer but nothing really to talk about.

[@victorhernandez769]

Thank you for the video gracias...

[@DottieS-ne8sd]

Hydraulic lift and tilt works on start up, when fluid warms up stops working on 743B. Getting worse. Where do you suggest to look, have not been able to pin down problem. Your video gives me hope!

[@jasono2139]

If the plastic seal can fail... why is it removable at all?? A solid plug (either a BB or a brazed seal) could easily replace that seal and would have zero chance of failing.

[@sethlawrence8958]

Dry wall screw on as far as it goes by hand into the O ring. Grab end with players. Comes right out.

[@tetradgroup]

I will try that, thanks.

[@Thomas-sv6jr]

So I have some creep when I let go of my controls (it still keeps rolling slowly). Is that indicative of some bad control valves? Also I am curious about axillary controls, can you add more, and what can you add within flow limitations. I have a trigger and a thumb switch on a 863c, and two plug ins. I'd like to run a tilt and angle grader attachment and a cut and split firewood processor.

[@RizwanKala-m5i]

Sar my bobcat 753 I am wark boom up boom wark don

[@RizwanKala-m5i]

Hy

[@tomhogan5171]

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