Not sure I understand the question. You may notice that IH listed both types of hydraulic for a SM as a attachment. Some customers probably ordered what they wanted and maybe dealers ordered what they wanted on tractors to put on the lot to sell. Just guessing on that last. Anyway after the serial break for type 2 SM all tractors recieved the chassis changes to accommodate the engine driven pump system whether equiped with the live pump, belley pump or no hydraulics. Some changes were battery box and seat, gear shifter to clear box, steering post with holes to mount voltage regulator to, Starter switch rod added, different support for starter, choke and belt pulley rods. Starter and clutch housing changed, belt pulley gear box lever changed, ignition switch put in gauge box, pto rod and bracket changed, rear light support moved to left side of battery box, electrical wiring changed for items in new locations, light bar changed to give more room to mount the liftall operating rod brackets, transmission top cover has another hole drilled to mount a breakaway coupling. Instead of the drive dog and seal on the front of transmission counter shaft for the belley pump drive a jam nut and washer was used along with a cover. No seal was used the cover blocked oil from escaping. IH started including the drive dog, seal and retainer in the transmission driven liftall attachments after stage 2 SM tractors started production. Since a reservoir was installed under the fuel tank and supported the rear of tank on live hydraulic equiped SM, the stage 1 foot starter switch was eliminated and the switch was mounted direct to starter and operated by a pull rod on stage 2 tractors. Probably missed something. Over on the red power site, you may notice 53 super M posting a picture with starter trouble. He has a modified tractor with some stage 2 parts added, live hydraulic added and a pull rod switch starter with 2 bolt nose installed on a 2 bolt clutch housing with a tractor serial # of 12xxx something I think
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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