Leaking Hydraulic Hose - Cat 943

electrical or duck tape is not pressure rated. if the hose let loose would you be injured? or someone else? is that a risk you want? Hydraulic fluid injection into skin or other body locations can kill you.

Be safe and replace the hose.

That said, the only way I would patch it would be wrap it. then take a larger hose with an i.d. of the o.d. of the hose leaking. Slit its length wise put is over the other with the slit on the back side of the leak. Then tape and use a hose clamps over the leak and close to either side of it provided the area does not move much. Now if the hose moves a lot this will not work it could cause the hose to break elsewhere with bad results.

Be safe on what ever you do.

The only way I would tolerate driving the CAT in it's current state is if I was SURE that the offending hose was a case drain (at nominally atmospheric pressure).

I doubt you would get any member of this forum to advocate a temp' repair however:- if the hose proved to be a pressure hose (not multi-spiral), the only repair you should consider is to cut the hose (in situ) then use two re-usable fittings to re-connect the hose.

If by gently flexing the hose (while the m/c is switched off) you feel slight creaking and cracking inside, this means that the internal reinforcing wire layers are breaking. If this is the case, there is no point in doing anything other than replacing the hose.

You should also be aware that hydraulic hoses are no longer allowed to pass through an area (like a cab) due to the possibility of high pressure oil injection to the operator.

If the hose lets rip while you are in the middle of a job, you will wish you had changed it out!

Have a good day by staying safe!

Beer after whiskey pretty risky

Prefab a hard line replacement asap, a half hour repair at your discretion or half day down time and new operator at burst time.

Whiskey after beer never fear

Absolutely do not attempt to patch a wire braid hose. A 943 Cat can have up to 5000 psi surge pressures in the hydrostat circuits and 4000 psi surges in the others. A pinhole leak with these pressures could kill or maim you. Replace the hose as soon as possible. Shut the machine off and manipulate all the functions. Then slowly remove the cap to relieve pressure in the system. If you can position the machine so whatever the hose services is below the leak it will alleviate the mess potential. Replace the cap and have appropriate size plugs handy to cap the holes when you remove the hose. If possible obtain a venturi cap to place on the tank. Once hooked to an air hose it keeps vacumn pressure on the tank and discourages it from flowing to the work circuits. If you are lucky, there will be a silver tag somewhere on that hose. Give the numbers to your Cat dealer and he can make you a new hose to have on hand to immediately swap in place when you take the old hose off. Remember, with hydraulics, cleanliness is godliness. Clean off everything and don't get dirt into the system. Check with your Cat dealer and put the proper fluid back in. There are some products that your bulk distributor will tell will interchange into your hydraulic system but will actually deteriorate your o-rings and seals. We've learned this lesson the hard way. Good luck and have some oil absorbent pads handy. You'll probably need them.

Hi all,

Excellent advice!

Yes, it is a pressurized hose leading to the cylinder that tips the bucket.

Felt the hose . . . it remains rigid and quite firm . . . minimal twist/movement during operation.

Have decided, based upon the advice to pull the hose, with the cylinder and have the cylinder rebuilt at the same time as the hose is replaced.

Yes . . . there will be a bit of transmission liquid on the ground (LOL).

Will be picking up several caps to close the outlets/inlets, prior to pulling the hose / cylinder.

This is the only hose exposed to the driver . . . and that is via a very small "window" in the metal guard shield . . . Just happens the "crows foot" is pointed right at the driver. Been able to watch this develop. Right now one or two drops form during a day's use, but it does indicate liquid is getting into the gap between the tube and the wrapping (seeking out the weakest point . . . the crow's foot).

Thanks again!

Yours,

Larry

Unless the cylinder is not delivering full performance, rebuilding it is an unnecessary and costly expense and will just provide more opportunities to contaminate your hydraulic system. Spend the money on something else the machine needs like worn ground engaging tools or perhaps a New Care machine inspection by your dealer. A qualified technician inspecting your machine may find something that needs attention and could save you money by avoiding a cost catastrophic failure.

Good luck

I have a quick fix for you

increase your ins policey

get a newspaper and look up help wanted

and apply for all jobs listed

never never never use chewing gum

its hard to rub it off your kidney

here is the thing

its broke fix it

that is what has to happen here

nothing more and nothing less

if the hose broke

would you be looking for electrical tape

YOU DRAW THE LINE AT THE BROKEN PART

here what is your answer to this

your on the railroad track the train is comming

your 57 chevey just painted and chromed is stuck

1) you put up your hand to stop the train

2) you lie across the track and hope its a christian engineer

2.5) you look at the moon and hope its not monday

2.6258) its your wife picking you up using a box car

with no wheels on the track and a flash light

makes you think its a train

and your new medications with its re adjusted qty

is having you day dream at night

your really feel your at the dentist office

having a wisdom tooth pulled

and your having 2nd thoughts

your dentist is dislexitc

and your not sure if

he is pulling the top or bottom tooth

what does it take to be safe

at what point do you stop fantize

and fix the problem

how come there is always time to do it wrong

but never enough time to do it right

we never read the road signs of ill fate

you get to think right once

and live the error many

think what is it worth to you

2.6258 b3 sect 4) question

I just have a curiose mind

after your drive this cat for a while

does your pants seam to give the ilusion of kidney problems

as you get up and walk away

were does the leak realy squirt on

me where

your friday nights may become a little more articluate

I rest my case