You pulled the clutch cover, broke the center bolt loose, backed it all the way out, and the primary clutch did not move. Then the temptation shows up: a couple of pry bars behind the sheave, a dead-blow hammer on the face, maybe a little heat. That is where a routine clutch job turns into an expensive one.
The Clutch Is Not Bolted On. It Is Wedged On.
The primary clutch does not slide onto a splined shaft the way a rear hub slides onto an axle. It sits on a tapered section of the crankshaft, and the center bolt does one job: it drives the clutch up that taper until the two matching cones lock together by friction. Once that happens, the clutch and the crank behave like a single piece of metal. Removing the bolt does not undo the wedge. It only takes away the thing that created it.
That is also why a clutch left in place for several seasons of heat cycles, moisture, and load can feel welded on. As far as hand tools are concerned, it basically is.
What Prying and Hammering Actually Cost You
Pry bars load the outer edge of the moveable sheave, which was never meant to be a structural surface. Bend it even slightly and you change the surface the belt rides against. You feel that later as vibration, uneven belt wear, and a machine that never quite engages the same way twice.
Hammering is worse. The crankshaft is supported by main bearings, and every hit you land on the end of it goes straight through those bearings. Heat is the third bad idea, because the aluminum clutch and the steel crank expand at different rates and you can gall the taper.
How a Real Puller Works
Polaris primaries use a threaded bore in the center of the clutch. A puller threads into that bore and bottoms against the end of the crankshaft, so as you tighten it, the tool pushes on the crank and pulls on the clutch at the same time. The load stays perfectly on axis, and the taper releases with a sharp crack rather than a fight.
The catch is that the threads in that bore are the only thing holding the clutch during removal. A puller that is undersized, off pitch, or made from soft material will start to strip them, and once those threads are chewed the clutch usually becomes scrap. This is why we make the Polaris 800/570 Primary Clutch Puller as a one-piece heat-treated steel tool with the thread form machined to match the clutch. It fits all years through 2022 on the Polaris Ranger 570 and 800, and all years of the Polaris RZR 570 and 800.
A Few Habits That Make It Easier
Thread the puller in by hand first. If it does not start smoothly, stop and clean the bore. Debris in those threads is a common cause of damage that gets blamed on the tool. Run the puller in until it is fully seated, then tighten with a wrench and let it work. Do not shock it with an impact gun.
Before the clutch goes back on, wipe the crank taper and the clutch bore clean and dry. Contamination on a taper is what keeps a clutch from seating fully, and a clutch that is not fully seated will loosen up on you later. Torque the center bolt to the factory spec with a torque wrench, and check the bolt again after the first few hours of riding.
The Bigger Picture
Most of the clutch damage we see come across the bench did not happen while the machine was running. It happened in somebody's shop, during removal, with the wrong tool. A puller is the cheapest part of a clutch service and it is the part that decides whether the clutch you take off is the clutch you put back on.