moe1965 752 #1 Posted June 11, 2024 I'm currently working on an 857 the drive belt calls for a 70 inch by half inch belt which is on the machine now it is a brand new belt it still seems to be quite sloppy first gear catches ok but 2 and third the belt slips and that takes off. I wonder if previous owner changed any of the pulleys the drive pulley is 4 inches across and the pulley on the engine is 2 1/2 in across the. Thanks in advance Share this post Link to post Share on other sites
rjg854 11,908 #2 Posted June 11, 2024 My first thought is what shape is the return spring in? Is it stretched out? Hooked up right? 1 Share this post Link to post Share on other sites
squonk 42,611 #3 Posted June 11, 2024 (edited) 1/2" X 70" is correct. What is you belt # ? If you got an A70 that belt is actually 72" long. I have an 857 and the belt that's on it is a 4L700 Edited June 11, 2024 by squonk 2 Share this post Link to post Share on other sites
hholmberg 1 #4 Posted January 10 1/2" x 70" did not work at all on my 857. I switched to a 1/2" x 69" and that solved my belt slipping issue. 1 Share this post Link to post Share on other sites
peter lena 9,095 #5 Posted January 10 @ rig854 , what a concept ? amazed to see reference to a related movement area , that is also connected to , rusty , connection areas . for me , # 1 is pulley upgrade , same type / size , with lubrication upgrade , first thing you want is wider bearing side grease shields , never replace with original failure type . also often pictures are looking at ONE STAGE OF THE FAILURE ISSUE , not the entire related MOVEMENT HAND OFF . DOES THAT MAKE SENSE ? my pto lever set up , does not scream or squeal , every related pulley / movement area , slides with ease . looks easy to me , detailing make a difference, pete Share this post Link to post Share on other sites
moe1965 752 #6 Posted January 10 It ended up being a somewhat bent belt guard not letting the idler pulley fully take out the slack. Share this post Link to post Share on other sites
hholmberg 1 #7 Posted January 10 9 minutes ago, moe1965 said: It ended up being a somewhat bent belt guard not letting the idler pulley fully take out the slack. I would think that would have been noisy. Share this post Link to post Share on other sites
