Quite a few people have brought to my attention that the front PTO motor mount bolts have been breaking off.... sometimes with BAD results... like messed up Drive clutches or bent PTO snouts.
The bolt in question is #19 in the Engine drawing below.
Here is an easy/inexpensive way to help make this area stronger and less prone to failures.
Many of you may chime in and say "I've never had a problem in 3700 miles with a turbo pulling big hills." .... this is a good thing..
And this inexpensive "upgrade" certainly can't hurt.
Polaris, by fixing the position of this front PTO mount, sure did NOT make it easy to align the clutches if they are off... lots of trial and error shimming if your alignment is off (like when you "find" a tree or rock).
And no, the torque stop is not an "Adjuster" to align the clutches. That thing is supposed to be sitting with clearance between it and the motor.
The front PTO mount on the 2007 Thru 2009 IQ RMK's is different than the other 3 in that it uses a bolt into the bulkhead through the isolation mount rather than a stud that is part of the isolation mount.
Most have not had a problem, but some have... it is a cheap fix to improve the strength of this bolt... and can be done by simply removing the primary clutch...
The bolt that Polaris uses is a grade 8 all-thread bolt with cut threads... not the best of quality and cut threads to the bottom of the head further weaken the bolt.
Last week when helping out with the updated piston and turbo install on EricW's Dragon 800 I had the chance to take some pix and put my hands on the parts.
The stock bolt shown in the pic as a gold-cad plated bolt next to a high strength ARP Stainless steel bolt.
The ARP has a significant shoulder as well as rolled threads and superior strength metal. 170,000 Psi tensile along with rolled threads and a substantial shoulder.
Grade 8 has a tensile strength of 150,000 psi... but that is reduced in shear by the cut threads and the fully threaded construction
Fastenall and McMaster Carr (as well as others) have Grade 9 [L9] bolts available as well which have a 180,000 psi rating ... the cost is lower than the ARP and come in a Gold-Cadmium coated finish.
www.mcmaster.com
Part number 90201A327 $8.00 for a 10 pack.
ARP part number 615-2500 $25 pack of 5 with washers. (stainless steel)
http://store.summitracing.com/partdetail.asp?autofilter=1&part=ARP%2D615%2D2500&N=700+0%2B115&autoview=sku
Install these with plenty of blue locktite when you install them.
Buy extras and treat your friends!!
