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Threaded holes in the top of the clutch piston. (Note: this snap ring is not used on some models). This snap ring is a stop for the clutch piston so it cannot over-stroke if the clutch PACK becomes too worn. With the spring removed, remove the snap ring above clutch Removing this spring, it should expand to aproximately 5" in length if it Tool, or you can purchase the tool in my store (seen here) This may be done in a press, or by making a simple To continue disassembly, the large spring in the center of the clutch carrier needs to beĬompressed enough to remove the snap ring. If the clutch PACK is the only parts being replaced no further disassembly is required. The large snap ring holding the clutch PACK can now be removed along with the clutch PACK. Set it aside, usually no further disassembly is necessary for the pump. Housing is bell shaped, and is 7 1/2" in diameter. The 4) 3/8" bolts that attach the pump housing to the unit. Replace shafts, brakes, or clutches within the unit. ![]() What follows here pertains to the removed PTO unit. ![]() ( Note Late model 86 series units may not have these taped bolt holes) The input shaft They will act as legs and you can stand the removed unit on them and the 540 output shaft. Into the two top rear threaded bolt holes (they will be sticking out theīack while unit is still in the tractor). Using 2 of the long bolts that held the unit in the tractor, screw them Sump tube which angles down towards the bottom of the rear frame The unit can be pulled back enough toĭisengage the drive shaft, but take care to not damage the oil Removing the 3 point hitch upper link bracket/cover allows access Removal requires draining the transmission/rear housing Removed, it cannot be disassembled while it's in the tractor. Pressure from the pump to a hydraulic piston that when pressurized, engages a clutch pack which drives the output shaft.įrame of the tractor for repair. When this valve is activated, it directs oil The hydraulic pump supplies oil pressure to a control valve inside ![]() (This pump is self contained in the unitĪnd only supplies pressure to the PTO unit). The constant running shaft powers a hydraulic pump driven by the To the unit by a constant running shaft which is driven by the clutch pressure The PTO unit on these tractors is a self contained assembly that is bolted to the rear frame of the tractor. This information pertains to the PTO unit of IH tractor models 706-1486.
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