Case cx130 replacing doughnut drive between hydraulic pump and engine .

Vinpetrol

Vinpetrol

Well-known member
Can I do this without dropping the hydraulic oil and removing the pump completely ? Also want to change the crank seal and hydraulic seal while I’m in about it . Any advice much appreciated
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
Can I do this without dropping the hydraulic oil and removing the pump completely ? Also want to change the crank seal and hydraulic seal while I’m in about it . Any advice much appreciated
the enormous supply pipe from tank to pump'll take some wrestling I'd've thought :unsure::oops:
is the crank seal lipped, requiring the rear bearing cap (and sometimes crank) removal / dropping :oops::oops::cry:
which hydraulic seal are you referring to Vin ?? front of the pump ?? (which'll still be full of oil? )
 
Vinpetrol

Vinpetrol

Well-known member
the enormous supply pipe from tank to pump'll take some wrestling I'd've thought :unsure::oops:
is the crank seal lipped, requiring the rear bearing cap (and sometimes crank) removal / dropping :oops::oops::cry:
which hydraulic seal are you referring to Vin ?? front of the pump ?? (which'll still be full of oil? )
Yes but I don’t actually need to change it as it’s engine oil I have a wee drip from the bell housing , that’s probably why the rubber has given up . I was only going to change hydraulic seal as I thought might be wise when I’m in there . Looks like a pump off job then buddy !
 
Vinpetrol

Vinpetrol

Well-known member
the enormous supply pipe from tank to pump'll take some wrestling I'd've thought :unsure::oops:
is the crank seal lipped, requiring the rear bearing cap (and sometimes crank) removal / dropping :oops::oops::cry:
which hydraulic seal are you referring to Vin ?? front of the pump ?? (which'll still be full of oil? )
I don’t think the crank case seal is a big job . I seem to remember the fitter damaging the one that’s in at the moment when we refitted the pump previously
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
Yes but I don’t actually need to change it as it’s engine oil I have a wee drip from the bell housing , that’s probably why the rubber has given up . I was only going to change hydraulic seal as I thought might be wise when I’m in there . Looks like a pump off job then buddy !
not necessarily Vin ... depends how long that supply python is and how much room you have to go wrestling it in -- gonna have to have enough room to withdraw the pump from the drive plate and if you have that you should be able to get at the crank seal with the bell housing/pump mount plate removed :rolleyes: .. but never looked in the guts 'cupboard' of a CX130 so simply guessing
 
Vinpetrol

Vinpetrol

Well-known member
I drained all the oil out and removed the pump then took the fly wheel out . The seal on the crankshaft looks fine so will be staying put . The rubber drive is well fecked though
IMG_6494.jpeg
IMG_6495.jpeg
IMG_6497.jpeg
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
so where the hell is the oil coming from? :unsure::unsure:
odd this is the only bolt with oil pooling in it ?
what's the back of the flywheel look like Vin ?
IMG_6495.jpg
 
Bri963

Bri963

Well-known member
Yes but I don’t actually need to change it as it’s engine oil I have a wee drip from the bell housing , that’s probably why the rubber has given up . I was only going to change hydraulic seal as I thought might be wise when I’m in there . Looks like a pump off job then buddy !
The oil will not have caused the coupling failure, for one thing there isn’t enough in there. I suspect, looking at the sealant round the rear crank seal, that the crank palm was worn when the new seal was fitted, or whoever worked on it bullied the new seal on and caused a bit of damage. Whatever, while it’s off I’d fit a new seal, but be a bit more careful than the last bloke. Without knowing the architecture, it might make fitting the seal a bit easier if you lower the sump a bit on its bolts. Be sequential or you’ll end up with another leak round the sump joint.

As for the coupling, the drive may not have been correctly positioned on the splines. Too far forward and it’ll take the end float out of the crankshaft and pump, too far back and the doughnut won’t drive across the full face and you’ll get premature wear. I worked on a Cat 315 that hadn’t been lined up properly (too far back on the splines) and the coupling was chewed up at under 1000 hrs. You need to do a bit of measuring and working out with a straight edge and steel ruler.
 
Vinpetrol

Vinpetrol

Well-known member
The fitter that done it first time round was a bit rough to say the least . Nothing got cleaned then and I think a lot of this residual oil is from prior to that seal change . The residue on the frame definitely has been there since then . What you’re seeing is as I started with a bit of brake cleaner before I remembered to take the pic🤦‍♂️ I will be cleaning it all up before refitting .
Still swithering about fitting the seal though 🤔
 
Vinpetrol

Vinpetrol

Well-known member
The oil will not have caused the coupling failure, for one thing there isn’t enough in there. I suspect, looking at the sealant round the rear crank seal, that the crank palm was worn when the new seal was fitted, or whoever worked on it bullied the new seal on and caused a bit of damage. Whatever, while it’s off I’d fit a new seal, but be a bit more careful than the last bloke. Without knowing the architecture, it might make fitting the seal a bit easier if you lower the sump a bit on its bolts. Be sequential or you’ll end up with another leak round the sump joint.

As for the coupling, the drive may not have been correctly positioned on the splines. Too far forward and it’ll take the end float out of the crankshaft and pump, too far back and the doughnut won’t drive across the full face and you’ll get premature wear. I worked on a Cat 315 that hadn’t been lined up properly (too far back on the splines) and the coupling was chewed up at under 1000 hrs. You need to do a bit of measuring and working out with a straight edge and steel ruler.
You’re right there Bri the oil definitley didn’t do for the donut . It was bone dry . I will defintley check the distances though as that’s a good shout . From memory I think the donut is more rounded edges on one side and I’m sure that would affect the contact .
 
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