Lane Ranger 10,968 #1 Posted April 5 My recycling mower quadrant broke from a rusty spot last week and I needed to mow again between all the rains we have been having. Put the 36 inch mower deck on my B-80 this am and after installing had a problem. My PTO would not engage and when moving the PTO rod forward to engage the tractor would die. Checked all the wiring on key switch, ammeter, rectifier and safety switches ( all mine are original) and did not find any issue. I removed the wiring connector to the PTO switch and everything looked good on wiring connector and back of switch. My Wheel Horse parts manual does not provide a part number for this PTO switch although it is noted in the wiring schematic. One other thing I had to do is hold the PTO engagement lever back in order to start the tractor. Anyone have a part number or information about a replacement switch? It could be something else but I am at a loss for figuring this problem out. I have a c-160 that has a loose PTO engagement switch but once you hold it back and start the tractor the tractor continues to run and the PTO engages the belt for the mower deck. Share this post Link to post Share on other sites
squonk 41,118 #2 Posted April 5 Parts tree list a Toro 101848 safety switch. doesn't say what it does but it is a different # than the clutch switch. Share this post Link to post Share on other sites
ebinmaine 67,508 #3 Posted April 5 5 minutes ago, squonk said: Parts tree list a Toro 101848 safety switch. doesn't say what it does but it is a different # than the clutch switch. I think the clutch switch on my mid 70s B & C Series is only a 2 terminal. @Lane Ranger I've read somewhere that some PTO switches have opposing circuits where one is Normally ON and one side is Normally OFF. When the switch is thrown the circuits reverse which is how the system is (dis)engaged. Only ONE of those circuits needs to be disabled/broken to prevent the switch operating properly. I believe if you have a continuity meter you can test your own switch. 1 Share this post Link to post Share on other sites
squonk 41,118 #4 Posted April 5 Judging by the high price, 101848 is probably the correct switch. Share this post Link to post Share on other sites
squonk 41,118 #5 Posted April 5 (edited) . Edited April 5 by squonk Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,045 #6 Posted April 5 Just a guess. Click on the picture for more Share this post Link to post Share on other sites
squonk 41,118 #7 Posted April 5 Parts tree lists the 104680 as a clutch switch for my C-160. I know my clutch switch doesn't look like that. Take all info for what it's worth. 1 Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,045 #8 Posted April 5 Don't see 101848 at Parts Tree Share this post Link to post Share on other sites
squonk 41,118 #9 Posted April 5 3 minutes ago, gwest_ca said: Don't see 101848 at Parts Tree Sorry. I made a typo. It was 101845 safety switch 104680 was listed as a clutch switch. I find that the 101845 is a ball switch so it looks like that isn't correct either. https://mpparts.com/part/toro-101845-safety-neutral-ball-switch-101845 Toro 104680 SWITCH-CLUTCH Toro 101845 SWITCH SAFETY Parts tree lists a lot of B-80 model #'s as B-60. The only one that would list it as a B-80 was 61-08K03 1976 1 Share this post Link to post Share on other sites
JoeM 7,874 #10 Posted April 5 (edited) Lane I have fixed those switches by removing the base from the housing and cleaning the contacts inside. just be careful small parts inside. Have to gently bend the circled tabs back. I believe one set of those contacts is for the seat start circuit ??? I have bought less expensive single pole switches for to stop the machine from starting with the pto on but not using the seat sw. Edited April 5 by JoeM 2 1 Share this post Link to post Share on other sites
Lane Ranger 10,968 #11 Posted April 5 2 hours ago, gwest_ca said: Just a guess. Click on the picture for more yes that is it! My B-80 is a 1975 . 1-0141 ., 149215 Share this post Link to post Share on other sites
squonk 41,118 #12 Posted April 5 (edited) Parts tree lists that as the clutch switch. See what I mean about listings? Picture in the parts breakdown looks right at least! Edited April 5 by squonk 1 Share this post Link to post Share on other sites
Ed Kennell 38,178 #13 Posted April 5 I guess by definition, the PTO is a clutch. 1 Share this post Link to post Share on other sites
Lane Ranger 10,968 #14 Posted April 5 (edited) thank you guys! I found a brand new old stock one! so I will replace! I guess I will have to use my self propelled push mower tomorrow! This photo shows how it was installed on my 1975 B-80. Edited April 5 by Lane Ranger 1 Share this post Link to post Share on other sites
Handy Don 12,232 #15 Posted April 6 16 hours ago, Lane Ranger said: self propelled push mower Hmmmm. 2 Share this post Link to post Share on other sites
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