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Diesel 188 push rods & valve seals

C

Cariboo4x4

Member
My mid 60's Case 530CK has the diesel 188. While inspecting the valve train I observed all the push rod ends do not have a tiny hole where oil leaks thru. You can see a iny spot in the center end of the push rod yet it's definitely not a hole. The service manual describes that oil travels through 1/8" hole in rocker arm to groove in adjustment screw and then through tiny hole in screw to lubricate top of push rod. I expect oil dribbles down outside of push rod to lubricate bottom end of push rod and lifter.

As for valve seals, Instead of an oil seal under keepers there is umbrella type valve seals under valve spring cap. I'll take a photo today and post it. I read a certain amount of oil should get into valve guide to lubricate valve stem so just want to be certain correct seals are in place.
 
Push rods upon closer inspection today have no holes in ends. The valve seal grommet that goes under the keepers in the service manual pictures or on the parts casece website parts diagrams definitely not in my valve spring caps. Instead I have these:



So I put in an order for the stock seals. Parts fellow said seals may not resemble pictures in manual or online.
 
In my service manual it states the gas engine only has a valve seal on intake valve so oil does not get sucked into combustion chamber. In the diesel engine section there is a valve seal on all intake and exhaust valves. In the trouble shooting section for diesel engine, under STICKING VALVES, under PROBABLE CAUSE, it says, "No lubrication of valve stems in guides", the SUGGESTED REMEDY it just says be certain oil is getting to rocker arms. I'm thinking the umbrella seals in the photo I posted above may limit the amount of oil to valve stems\guides. Possibly the small valve seal that fits in the valve spring retainer cap is meant to keep excessive oil from dribbling down valve stem. Anyone know what is best?
 
I been doing a lot of research tonight if I should even use valve seals\grommets on valves or just the intake valves. The Diesel 188 kits I find online, most do not even come with valve seals. Some say better to have no seals so more lube and put up with a bit of smoke. I'd have to extend my muffler cause I hate breathing in smoke!!
 
(quoted from post at 23:02:08 02/01/16) I been doing a lot of research tonight if I should even use valve sealsgrommets on valves or just the intake valves. The Diesel 188 kits I find online, most do not even come with valve seals. Some say better to have no seals so more lube and put up with a bit of smoke. I'd have to extend my muffler cause I hate breathing in smoke!!
Click to expand...

Heres the seals depicted in service manual: I'll take off the umbrella seals and use just these under the keepers
 

Well finally after getting all the wiring cleaned up and a bunch of other odds and ends completed on tractor I finally was able to fire it up. So far in the shop it runs really nice. Way better sounding with timing adjusted to spec. I'm sure the new valve springs are helping and the valve guides getting proper lubrication with correct valve seals. However my small shop quickly filled with exhaust smoke so hope to get it out tomorrow and see it come up to temperature. Oil pressure is very good. No leaks so far from rebuilt case-o-matic. Its been a year since tractor ran so was very ecstatic to hear it finally purr!

 
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