Harpkatt 1 #1 Posted June 7, 2022 Recently purchased a 310-8 w 42 deck, as bought everything worked but needed some help. the PTO belt to the mower deck barely existed,it was worn and tattered but it still cut. I needed to replace a spindle assembly and purchased a new belt at the same time. I installed the new belt and now the belt slips the second it touches the grass. I purchased the belt from a local agway but it definely isn't the best available. It's a little shorter than I believe it should be 100 inches in think it was. it is enough to allow me to use the idle pulley/tensioner,but no matter how I adjust it it slips. Do I simple need the longer belt? What other issue could this be? Share this post Link to post Share on other sites
8ntruck 6,993 #2 Posted June 7, 2022 to the forum. Plenty of help here. The belt you replaced is the one on the deck driving the spindles, or the one between the PTO and the deck? If it is the one between the PTO and deck, are you sure it is the belt that is slipping? It could be the PTO clutch that is slipping. Belt slipping goes down a different diagnostic path than slipping clutch does. Just to be sure, the belt driving the deck should be in the large diameter pulley groove on the PTO. Good luck. 1 Share this post Link to post Share on other sites
Harpkatt 1 #3 Posted June 7, 2022 The belt that is slipping is between the PTO and the deck. The PTO worked fine before I changed the belt,so I doubt it is the PTO clutch. I definitively have it in the wrong pulley if it's intended for the larger one. Any thoughts on what sized belt I would need to use the larger pulley? do the Two pulleys have different profiles? If so that could explain why the belt is slipping. I believe I recall it visually slipping. 1 Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,036 #4 Posted June 7, 2022 42" Side discharge drive belt Drive belt 102742 replaced by 94-2501 (1/2" x 103") 42" Rear discharge drive belt Drive belt 108834 (1/2" x 98") [Replaces 102741 as per PSB #272 in this application] 1 2 Share this post Link to post Share on other sites
953 nut 55,120 #5 Posted June 7, 2022 I see Garry has you covered on the belt needed. Once you get the correct length belt in place and the belt on the larger pulley of the PTO you should tighten the Mule Drive (counterclockwise) and then check the tension again after the first mowing. 1 Share this post Link to post Share on other sites
lynnmor 7,302 #6 Posted June 7, 2022 Yes, get the correct belt and install it on the correct pulley, then tension it as shown in the manual. Adjust the PTO clutch so that it won't slip, a slipping clutch can cause the belt to slip as the speed slows. Share this post Link to post Share on other sites
peter lena 8,589 #7 Posted June 7, 2022 @Harpkatt look up lubricating the needle bearing in that belt drive cone , carefully wipe out existing grease , use a small amount of hi temp lucas chassis grease , x tra heavy duty , 560 temp rated anti sling , just enough to lightly cover bearing , excess will get on clutch, avoid that . that bearing will now work as it should transferring that drive stress , much easier , lubricate all related , rusty areas , so it moves with ease , pete Share this post Link to post Share on other sites
Harpkatt 1 #8 Posted June 7, 2022 Belt drive cone? Is this part of the PTO or the idle pulley? Share this post Link to post Share on other sites
8ntruck 6,993 #10 Posted June 7, 2022 1 hour ago, Harpkatt said: Belt drive cone? Is this part of the PTO or the idle pulley? That is the part of the PTO with the pulley grooves. Also sometimes called the PTO bell. 1 Share this post Link to post Share on other sites
peter lena 8,589 #11 Posted June 7, 2022 @Harpkatt , sorry about the incorrect name I referred you to , most important about that service , thanks @8ntruck for correct name that its part of the pto belt drive system . often have people refer to a single trouble spot, when every one of these set ups has to function completely at every area , those bearings get quite hot , found if you service them all , with hi temp grease , the spin up and drive ease is very apparent . also forget , about being new at this , as you get familiar with repairs you will , fit right in . pete Share this post Link to post Share on other sites
Harpkatt 1 #12 Posted June 7, 2022 I appreciate the help so far. thanks all Share this post Link to post Share on other sites
Bill D 1,915 #13 Posted June 8, 2022 Welcome. Please post a picture of the PTO assembly and belt if you can. It will help us help you. Share this post Link to post Share on other sites
Harpkatt 1 #14 Posted June 9, 2022 I'll get one this weekend. It's not at my house. Share this post Link to post Share on other sites
