Yes thats a D4400 from a 5T series D4, it would be a downgrade from the D315. I'd locate another 315
As Rome says, engine is a no go, but my understanding is the D4 5T shares basically the same transmission housing and final drives with the 6U / 7U, so if your machine might need back end parts too, that donor machine might be handy for things like sprockets or bottom rollers, bullgears or transmission gears.
For example I used the upper transmission shaft and later model helical cut crown wheel and pinion out of a D4 6U/7U to save a early D4 7J built in 1939 that has the D4400 engine, and straight cut crown and pinion gears.
The best way to be certain is to look at the Parts Number book for each model, and I think they will be found in the Technical Library in the forum though accessible only to ACMOC financial members, so think about joining ACMOC, its cheap relative to the cost of saving a dead Cat, maybe $30 or $40 a year, that wouldn't even buy you 10 minutes talking to a Cat Dealer Mechanic who probably has never worked on a early D4..........
As Rome says, engine is a no go, but my understanding is the D4 5T shares basically the same transmission housing and final drives with the 6U / 7U, so if your machine might need back end parts too, that donor machine might be handy for things like sprockets or bottom rollers, bullgears or transmission gears.
For example I used the upper transmission shaft and later model helical cut crown wheel and pinion out of a D4 6U/7U to save a early D4 7J built in 1939 that has the D4400 engine, and straight cut crown and pinion gears.
The best way to be certain is to look at the Parts Number book for each model, and I think they will be found in the Technical Library in the forum though accessible only to ACMOC financial members, so think about joining ACMOC, its cheap relative to the cost of saving a dead Cat, maybe $30 or $40 a year, that wouldn't even buy you 10 minutes talking to a Cat Dealer Mechanic who probably has never worked on a early D4..........
Been looking a little closer and find the D315 sears engine are not as interchangeable as I had thought.Though it can be done just keep an eye on clearances.
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