mikekot3 93 #1 Posted November 15, 2020 Hello, I have a WH 416-8 that I replaced the PTO bearings and the clutch disc. What do I need to do to adjust the rod that is actuated when the PTO lever is engaged? Is there an air gap that I measure with feeler gauges perhaps between the clutch disc and the PTO hub? Please advise, Mike Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,444 #2 Posted November 15, 2020 That is a good question and one not easily answered. There is no specification. Have never had a new clutch disc to compare to used. The proper tension will not allow the clutch to slip but how do you tell if it is slipping? My used discs will utter a high pitched squeal when they slip. If a turn of the trunnion to tighten the linkage eliminates the squeal you will know it was the clutch and not a slipping belt. You do not want it tighter than necessary because that is hard on the crankshaft bearings and pto thrust bearing. When the pto handle is applied about 2/3 of the way increased pressure is felt in the handle and the last 1/3 goes over-center and the handle pressure decreases. The pressure at 2/3 is what keeps the pto engaged. Section 7-9 page 9-1 of this service manual describes the procedure. How to adjust the pto brake is there also. You can use a business card in place of a feeler gauge for the brake adjustment. Your 416-8 is the same as the C-series in the manual. Will guess the tension on a new disc is going to change for a while until it wears in so keep an eye on it. Garry 1 Share this post Link to post Share on other sites
wallfish 18,060 #3 Posted November 15, 2020 You want it tight enough so it doesn't slip but not so over tight that it puts extreme pressure on the crank shaft. One thing to add is resurfacing the hub. The flat side which makes contact with the new clutch disk. I use a belt sander but it can also be done by using sand paper on a flat surface and rub the surface in a circle on it. Maximum contact is achieved when both of those surfaces are flat and the clutch pad will last longer and not overheat from slipping. 1 Share this post Link to post Share on other sites
mikekot3 93 #4 Posted November 15, 2020 Thank for the help with my question. I had the pto surface resurfaced already. I will adjust the trunion gap as was suggested. Share this post Link to post Share on other sites
