Cat 3535 problem???

[cap732000]

I just changed seals in my cat 3535 pump and after about 10 cars it already has water in oil everything appeared fine inside.... Any suggestions?????

 

[I.B. Washincars]

Which seals did you replace, the ones in the head/manifold, or the ones in the crankcase? The ones in the head aren't going to do much, if anything for water in the crankcase. I would be looking for a bad plunger bolt seal or a cracked plunger. Judging from the fact that the water got in there so fast, I would say you have a plunger issue and not the crankcase seals.

 

[cap732000]

Ok we changed all the head seals. My son and friend did most of the work I'm not sure about the crankcase seals do they come in the seal kit as we'll? If so then yes if not then they weren't replaced. If I remember correctly the only thing replaced on the crankcase was the rubber orings on the end of plunger I looked at all the plungers they appeared fine.

 

[I.B. Washincars]

IMO, if the crankcase seals were allowing water inside it should take a very long time to get a noticeable amount of water. I would think that I would leak some oil as well. I haven't done much work on a 3535 since they are so reliable, but don't think they are much different than the smaller pumps. Maybe someone with more experience with this particular pump will chime in soon.

 

[cantbreak80]

As evidenced by the lip and garter spring, the crankcase oil seals are intended to keep oil IN the crankcase, not keep water OUT.

Keeping water out of the crankcase is the responsibility of the low pressure seals, the V-packing, and the plunger O-rings and back-up rings.

Cracked plungers or improperly installed/damaged plunger o-rings allow high pressure water to be forced down the inside of the plunger. This hp water will easily lift the oil seal’s lip from the crosshead.

Because your issue occurred immediately after the service, I would suggest reexamining the plungers, their o-rings/backup rings and the proper orientation of the water seals.

 

[MEP001]

cantbreak80 is right, if there is water getting in the oil and you're not seeing water on the floor, it's probably leaking through the bolts on the plunger or through a cracked plunger. Pull up the service manual and order a spare plunger and all the hardware to replace the three bolts and seals on them.

 

[cap732000]

Ok sounds good thanks!

 

[cap732000]

We'll I think I found the culprit I watched my teenage son put the O rings on under the ceramics it appears he did not get it screwed back on tight it slid right off. I'm lucky it didn't break anything. I'll be more hands on training next time!

 

[cantbreak80]

Thanks for the update.
First time I've been right this year!