Re: WD oil filtering

Posted by DanD. on July 20, 2005 at 10:04:09 from (4.143.183.176):

In Reply to: Re: WD oil filtering posted by don dittmar on July 20, 2005 at 04:32:04:

The WD engine is a 4" bore and a 4" stroke. THe WD45 and D17 also have a 4" bore and a 4.5" stroke giving the 226 cid. The oil pumps in all of these engines are driven by a gear off the middle of the camshaft and the oil pump is a gear type pump that sticks down into the oil pan. In the older bypass engines, the oil flows through a tube fom the pump and then into a passage in the block. From there, oil can flow two different routes. It can go to the oil filter(a little oil that goes this way is diverted to the rocker arms and governor and doesn"t reach the filter) and then immediately back into the pan or else it can flow to the cam bushings and cam shaft and from there to the main bearings and then to the rods. Early D17"s also had the bypass oil system until they were changed to the full flow system at serial number 24001. It is not practical to change form the bypass system to the full flow unless you happen to have a full flow D17 block lying in the junk pile and are looking for a project. I agree with the other post in that the amount of work any of these tractors sees today is miniscule compared to what they did in the past. Change the oil and filter once in a while and they will run another 50 or 60 years or 70 years.

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