Jacka Posted January 11 Posted January 11 I have a 1026.I was curious if the engine in it is exactly the same internally as a 1456.Both are 407s,both turbo charged.Other than the injection pump setting just wondering if they are the same. Quote
brahamfireman Posted January 11 Posted January 11 Internals should be the same. Pump on a 14 is 4 roller, all others were 2 Quote
snoshoe Posted January 11 Posted January 11 Air flow on the 14 head is different. 4 plunger pump injects fuel in shorter time span. Quote
Nebraska1206 Posted January 11 Posted January 11 A 1456's 407 has the 1.625" diameter wrist pin connecting rods, to go along w/ the four roller Roosamaster injection pump. A 1026's 407 should have the more common 1.5" diameter wrist pin connecting rods & two roller Roosamaster injection pump. 1 Quote
Jacka Posted January 11 Author Posted January 11 22 minutes ago, snoshoe said: Air flow on the 14 head is different. 4 plunger pump injects fuel in shorter time span. So is the timing different or does the engine generally run at a higher rpm at full throttle Quote
brahamfireman Posted January 11 Posted January 11 3 hours ago, snoshoe said: Air flow on the 14 head is different. Can you post the different part numbers? Quote
brahamfireman Posted January 11 Posted January 11 2 hours ago, Jacka said: So is the timing different or does the engine generally run at a higher rpm at full throttle Same rpm, pump timing is different. I think a 14 is actually 2 degrees ATDC. Vs all others being BTDC. Quote
Injpumped Posted January 11 Posted January 11 To clear up much confusion on pump timing, those are just where the marks in the pump line up, it is not injecting fuel 2* after lol! The IH Roosa pumps are marked for end of injection, this is the case when an engine is timed near TDC. Quote
snoshoe Posted January 11 Posted January 11 51 minutes ago, brahamfireman said: Can you post the different part numbers? I can not. I have no doubt replacement part numbers are probably the same for all 407s. Am sure the production heads for 1456s were different. It was with intake airflow. I could not look at a head today and point out what. Quote
snoshoe Posted January 11 Posted January 11 3 hours ago, Jacka said: So is the timing different or does the engine generally run at a higher rpm at full throttle Start of injection varies by how far out the plungers move (how much fuel you are injecting). With 4 plungers taking shorter strokes. Start of injection is automatically retarded. I do not remember specs but advance may have changed too Quote
Long Farms Posted January 11 Posted January 11 5 hours ago, Nebraska1206 said: A 1456's 407 has the 1.625" diameter wrist pin connecting rods, to go along w/ the four roller Roosamaster injection pump. A 1026's 407 should have the more common 1.5" diameter wrist pin connecting rods & two roller Roosamaster injection pump. TT407s in 1026s have the 1-5/8" wrist pin too. Quote
7and8and1456 Posted January 14 Posted January 14 On 1/11/2026 at 6:10 PM, Long Farms said: TT407s in 1026s have the 1-5/8" wrist pin too. My 407 Engine parts book shows 1456 has a different part number for piston, piston pin, piston pin retaining ring and piston pin bushing than engines for 1026, 1256 and 856. Quote
brahamfireman Posted January 14 Posted January 14 21 hours ago, 7and8and1456 said: My 407 Engine parts book shows 1456 has a different part number for piston, piston pin, piston pin retaining ring and piston pin bushing than engines for 1026, 1256 and 856. The rods are the same? Quote
7and8and1456 Posted January 15 Posted January 15 31 minutes ago, brahamfireman said: The rods are the same? I missed checking on the rods. The rods are different also. Quote
Dirt_Floor_Poor Posted January 15 Posted January 15 I wonder how many 915 combines are still out in the wild with 407 engines that are any good. 1 Quote
Diesel Doctor Posted January 15 Posted January 15 On 1/11/2026 at 11:37 AM, Jacka said: So is the timing different or does the engine generally run at a higher rpm at full throttle The 1456 is timed 1 degree after top dead center. Must be the four roller pump that causes this. All others, that I remember, are timed before top dead center. Quote
Nebraska1206 Posted January 15 Posted January 15 14 hours ago, Dirt_Floor_Poor said: I wonder how many 915 combines are still out in the wild with 407 engines that are any good. I have not seen it myself, but I have a customer at the dealership here that has a 915 w/ a 407 sitting in the shed. Should really try to keep tabs on that machine. 3 Quote
Jacka Posted January 16 Author Posted January 16 19 hours ago, Nebraska1206 said: I have not seen it myself, but I have a customer at the dealership here that has a 915 w/ a 407 sitting in the shed. Should really try to keep tabs on that machine. Thats the best info ever.I never owned or ran a 915,I had no idea that's what they put in them.I figured it would have had 400 series engine in it.I am now going to keep my eye open for one at auction but haven't seen one for years here on the east coast.A good 407 is valuable. I imagine that with the other talk when it goes to taking combine engines and putting them in a tractor they would need modification.I never did the switch from a combine to a tractor. Quote
IHandJDman Posted January 16 Posted January 16 2 hours ago, Jacka said: Thats the best info ever.I never owned or ran a 915,I had no idea that's what they put in them.I figured it would have had 400 series engine in it.I am now going to keep my eye open for one at auction but haven't seen one for years here on the east coast.A good 407 is valuable. I imagine that with the other talk when it goes to taking combine engines and putting them in a tractor they would need modification.I never did the switch from a combine to a tractor. Early 915s had 407s, later "low-profile" ones did not. They had dt414s. Quote
Nebraska1206 Posted January 16 Posted January 16 56 minutes ago, IHandJDman said: Early 915s had 407s, later "low-profile" ones did not. They had dt414s. The change from 407's to 414's was actually done during early 815 & 915 "High Profile" production. According to parts books for a 915, s/n 2349 & below could have a 407, s/n 2350 & above were 414's. So there really weren't too many of them, considering there were gas-powered units in that mix as well. 2 Quote
7and8and1456 Posted January 16 Posted January 16 Some Galion motor graders from the late 1960's -early 1970's had Turbo 407 engines in them. A friend 3 miles from here has an engine that was removed from a Galion. 1 Quote
FarmerFixEmUp Posted January 17 Posted January 17 I seem to remember one in a Hough payloader at one time? Also found this video. Some things they say and pictures aren't very accurate. Quote
7and8and1456 Posted January 17 Posted January 17 "Also found this video. Some things they say and pictures aren't very accurate." Lot of stuff shown and said is not accurate !!!! This is what can be expected from A . I. (artificial intelligence. 1 Quote
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