🙌 I cannot tell you how hard I looked for a video like this. I have an SRC 621 and could not find a video that explained it specific to that model until now! I just did this exact repair last weekend and have now run into a problem with my self propel function. Before replacing the belt, the mower was propetually stuck in 5th or 6th gear, it would never let me go below those gears. Fast forward, I replace the belt by taking off the blade adapter and lowering the swing arm (contrary to your method) and successfully replaced the belt. Put the idler pull back together and decently tightened it. Went back to Turn it on and realized the speed control cable was not seated in the wheel on the outside. So I fix that by reseating it and installing it back into the swing arm and now I barely have any tension on the drive cable at all, and the gear selector is still stuck. Once more, I tried to take a part the control box for the gear selector and drive handle and broke some of the screw holes. mowed the yard after all this just fine, but the self propel would not engage so I am panicking hoping I can open everything up again this weekend to fix the issue. From what I can tell, there is nothing providing pull tension to actively get the belt to engage with the pulley. Any good ideas where I should start? From the video, seems like adjusting the speed selector and drive engagement right off the bat might fix the issue. We will see. Still don’t know why the gear selector would be stuck though. I’m hoping some easing of the tension on the speed selector fix it, but I’ll have to start the process of elimination after that if it isn’t fixed with adjustment of the speed/drive cables. Thanks for the thorough video!!
Glad I could help! Almost sounds as if the gear selector is broken. If yours is the same as mine, it's a plastic assembly so something may have broken inside. If you're not already, check the movement when you're inspecting the underside with the covered off and the lawnmower not running.
@@homesforbeginners yes I believe something was already broken with the gears. I was fine with it being stuck in 5th or 6th gear. As I could at least still have propulsion. But now I can’t even use either of them so I think I’ve done something to the drive cable. When I pull, the cable is barely moving the transmission and pulley, not nearly enough for it to catch and engage with the motor and cause movement of the wheels. Idk how I would have broken that in changing the belt but I think I did something to somehow cause the back pulley (where the belt loops closest to the rear of the deck) to not be able to pull and tense up enough to actually engage. Going to look at it today and hope for a fix. I’ll let you know.
@@homesforbeginners Just spent two hours trying to fix it with no avail. Still having a hard time understanding what’s wrong. Any chance I can email you some video from my repair attempt to get your opinion?
Being that it's the same open/close pulley, it doesn't have gears. It works on a variable pulley drive, similar to a snowmobile. As the engine pulley changes in size, it'll change the ratio which affects the speed on the wheel gearbox. Feel free to upload the video to UA-cam and just share the link in the comments here.
🙌 I cannot tell you how hard I looked for a video like this. I have an SRC 621 and could not find a video that explained it specific to that model until now!
I just did this exact repair last weekend and have now run into a problem with my self propel function. Before replacing the belt, the mower was propetually stuck in 5th or 6th gear, it would never let me go below those gears.
Fast forward, I replace the belt by taking off the blade adapter and lowering the swing arm (contrary to your method) and successfully replaced the belt. Put the idler pull back together and decently tightened it. Went back to Turn it on and realized the speed control cable was not seated in the wheel on the outside. So I fix that by reseating it and installing it back into the swing arm and now I barely have any tension on the drive cable at all, and the gear selector is still stuck. Once more, I tried to take a part the control box for the gear selector and drive handle and broke some of the screw holes.
mowed the yard after all this just fine, but the self propel would not engage so I am panicking hoping I can open everything up again this weekend to fix the issue. From what I can tell, there is nothing providing pull tension to actively get the belt to engage with the pulley. Any good ideas where I should start?
From the video, seems like adjusting the speed selector and drive engagement right off the bat might fix the issue. We will see. Still don’t know why the gear selector would be stuck though. I’m hoping some easing of the tension on the speed selector fix it, but I’ll have to start the process of elimination after that if it isn’t fixed with adjustment of the speed/drive cables.
Thanks for the thorough video!!
Glad I could help! Almost sounds as if the gear selector is broken. If yours is the same as mine, it's a plastic assembly so something may have broken inside. If you're not already, check the movement when you're inspecting the underside with the covered off and the lawnmower not running.
@@homesforbeginners yes I believe something was already broken with the gears. I was fine with it being stuck in 5th or 6th gear. As I could at least still have propulsion. But now I can’t even use either of them so I think I’ve done something to the drive cable. When I pull, the cable is barely moving the transmission and pulley, not nearly enough for it to catch and engage with the motor and cause movement of the wheels. Idk how I would have broken that in changing the belt but I think I did something to somehow cause the back pulley (where the belt loops closest to the rear of the deck) to not be able to pull and tense up enough to actually engage. Going to look at it today and hope for a fix. I’ll let you know.
@@homesforbeginners Just spent two hours trying to fix it with no avail. Still having a hard time understanding what’s wrong. Any chance I can email you some video from my repair attempt to get your opinion?
Being that it's the same open/close pulley, it doesn't have gears. It works on a variable pulley drive, similar to a snowmobile. As the engine pulley changes in size, it'll change the ratio which affects the speed on the wheel gearbox. Feel free to upload the video to UA-cam and just share the link in the comments here.