Full Flow oil.

What year or at what ser # did the D17 go to the "Full Flow" oil system ?

190XT 2WD45 WF D15 D14 CA BIG10 302 & 303 bailers 77G rake 80R mower 6 plows and alot more

Effective on G-226 engine s/n of 17-19978 and up.

There was a point in time where the old style G-226 blocks were discontinued and the full-flow block was the only replacement.

If the block doesn't have a s/n behind the carb, it was a new block from the parts dept.

I'd bet most of them had spun the center main bearing, ruining the block at the center main area. The factory change to full flow did two things: kept engine oil CLEAN and increased oil pressure because the oil pump speed was increased. Just changing the block to the full-flow style got you cleaner oil. To increase the oil pressure required a new camshaft and an oil pump driven gear on top.

The Engineers made a mistake in the early G-226 engines in my opinion. They provided engine oil 100% of the time to the rod bearings. This was to increase rod bearing life with the increased compression/power pressure and RPM's of the new engine. On a W-201/W-226 the rod bearings were only oiled 1/6 or 1/3 of the time (don't remember which one). So, they soon found out that as the G-226 got some wear on the bearings(including cam brgs), they didn't carry any oil pressure. This was the reason for increasing the oil pump speed was to provide more volume (GPM's) to keep up with the demand of 100% rod bearing oiling. By the time they got to the Series 4 engine with the "Tufftrided" crankshaft journals, most of the time the crankshaft didn't even need to be reground at the first overhaul. Just slip in new main bearings (at -.001 under) and standard rod bearings and you were good to go. Now, if you had a Customer who was terrible on oil changes and regular maintenance, this might not be true.

Edited by DrAllis - 23 Dec 2018 at 3:56pm

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ctbowles58 Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 17 Jun 2011 Location: Clarksville, MO Points: 2249	Post Options Post Reply Quote ctbowles58 Report Post Thanks(0) Quote Reply Topic: Full Flow oil. Posted: 21 Dec 2018 at 8:41pm
	What year or at what ser # did the D17 go to the "Full Flow" oil system ?
	190XT 2WD45 WF D15 D14 CA BIG10 302 & 303 bailers 77G rake 80R mower 6 plows and alot more

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Kevin in WA Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 08 Feb 2010 Location: Lynden, WA Points: 612	Post Options Post Reply Quote Kevin in WA Report Post Thanks(0) Quote Reply Posted: 21 Dec 2018 at 8:48pm
	SN 24,000 and up had full flow, mid 59 or so, black bar grill tractors.

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21439	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 21 Dec 2018 at 10:25pm
	Effective on G-226 engine s/n of 17-19978 and up.

SteveM C/IL Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Shelbyville IL Points: 8509	Post Options Post Reply Quote SteveM C/IL Report Post Thanks(0) Quote Reply Posted: 22 Dec 2018 at 9:47am
	But over the years many mods happen so not unusual to find a full flow in an older one. Just look at system to identify when viewing tractors.

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21439	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 22 Dec 2018 at 4:24pm
	There was a point in time where the old style G-226 blocks were discontinued and the full-flow block was the only replacement.

SteveM C/IL Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Shelbyville IL Points: 8509	Post Options Post Reply Quote SteveM C/IL Report Post Thanks(0) Quote Reply Posted: 22 Dec 2018 at 11:22pm
	My cousin has a 57 or 8 that has a full flow in it.Bought used of course so don't know the history.

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21439	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 22 Dec 2018 at 11:45pm
	If the block doesn't have a s/n behind the carb, it was a new block from the parts dept.

Lonn Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 16 Sep 2009 Location: Назарово,Russia Points: 29792	Post Options Post Reply Quote Lonn Report Post Thanks(0) Quote Reply Posted: 23 Dec 2018 at 8:43am
	When I worked at the Allis dealership the older mechanics told me that they converted several early D17 engines over to full flow.
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DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21439	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 23 Dec 2018 at 8:46am
	I'd bet most of them had spun the center main bearing, ruining the block at the center main area. The factory change to full flow did two things: kept engine oil CLEAN and increased oil pressure because the oil pump speed was increased. Just changing the block to the full-flow style got you cleaner oil. To increase the oil pressure required a new camshaft and an oil pump driven gear on top.

Bill Deppe/AC Salvag Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Location: Maquoketa, Iowa Points: 973	Post Options Post Reply Quote Bill Deppe/AC Salvag Report Post Thanks(0) Quote Reply Posted: 23 Dec 2018 at 12:36pm
	Would another reason to increase more volume to the larger diameter mains?

DrAllis Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 12 Sep 2009 Points: 21439	Post Options Post Reply Quote DrAllis Report Post Thanks(0) Quote Reply Posted: 23 Dec 2018 at 3:52pm
	The Engineers made a mistake in the early G-226 engines in my opinion. They provided engine oil 100% of the time to the rod bearings. This was to increase rod bearing life with the increased compression/power pressure and RPM's of the new engine. On a W-201/W-226 the rod bearings were only oiled 1/6 or 1/3 of the time (don't remember which one). So, they soon found out that as the G-226 got some wear on the bearings(including cam brgs), they didn't carry any oil pressure. This was the reason for increasing the oil pump speed was to provide more volume (GPM's) to keep up with the demand of 100% rod bearing oiling. By the time they got to the Series 4 engine with the "Tufftrided" crankshaft journals, most of the time the crankshaft didn't even need to be reground at the first overhaul. Just slip in new main bearings (at -.001 under) and standard rod bearings and you were good to go. Now, if you had a Customer who was terrible on oil changes and regular maintenance, this might not be true. Edited by DrAllis - 23 Dec 2018 at 3:56pm