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Message: <blockquote data-quote="longeze" data-source="post: 47255" data-attributes="member: 6252"><p>Thanks Jerry. I found answers and am posting here in case someone else encounters the same issues. Regarding the 4way gearbox, the schematic in the L779 operators manual appears to be incorrect. A NewHolland rep advised that the L779 shares the same transmission and drive system configuration as the smaller L35. Pumps are incorporated into each wheel motor and driven through the 4way gearbox. The concentrically mounted pump on the end of the gearbox is for the loader functions only. As for the lack of exhaust valve guide seals on the Perkins 4.203.2 diesel engine, the Perkins parts rep told me that seals aren't used on the exhaust valve guides because unlike earlier models which used identical guides for both intake and exhaust valves, over the course of their production run Perkins switched to longer exhaust valve guides which left insufficient clearance for seals, which if used would cause the rocker arms to bind and break off the adjusting screw tips. Therefore, the exhaust valve guide seals are to be omitted. Thanks again to all who took the time to post.</p></blockquote><p></p>