TC10284 109 #1 Posted June 18, 2018 Have a 520H model 3120OE01. I need to replace the fuel line but I'm not sure how difficult it is. It's cracked a few inches below the vacuum pump. It looks like it is routed under the gear shift plate. Does anyone have any steps or tips on replacing the fuel line? Share this post Link to post Share on other sites
EricF 589 #2 Posted June 18, 2018 Try removing the left-hand side cover. (The one just above the footboard) The parts diagram (pg.38) shows that it should be routed just behind this cover, so it's in front of the side plate for the tunnel where the lift mechanicals are. There is also a hold-down clamp on top of the transaxle housing or frame-to-transaxle mount plate; getting to that easily may require removing the fender pan. It is, however, a fairly straight run back to the tank. Note that the fuel line should form a low point toward the front of its run behind the side cover -- lower than the fuel pump inlet and lower than the rest of the mostly-level run back to the tank -- Toro's document shows it drops level with the bottom of one of the largest round holes punched in the inner plate that's below the dash tower. This drop in the line will help limit drain-back to the tank. In general, keep it nice and low before entering the pump to give gravity a chance to help with feeding fuel to the pump -- remember that the tank is lower than the carb, so anything that can help with the feed to the pump is good. You can find the parts diagram in the files section here on Red Square. Share this post Link to post Share on other sites
TC10284 109 #3 Posted June 18, 2018 15 hours ago, EricF said: Try removing the left-hand side cover. (The one just above the footboard) The parts diagram (pg.38) shows that it should be routed just behind this cover, so it's in front of the side plate for the tunnel where the lift mechanicals are. There is also a hold-down clamp on top of the transaxle housing or frame-to-transaxle mount plate; getting to that easily may require removing the fender pan. It is, however, a fairly straight run back to the tank. Note that the fuel line should form a low point toward the front of its run behind the side cover -- lower than the fuel pump inlet and lower than the rest of the mostly-level run back to the tank -- Toro's document shows it drops level with the bottom of one of the largest round holes punched in the inner plate that's below the dash tower. This drop in the line will help limit drain-back to the tank. In general, keep it nice and low before entering the pump to give gravity a chance to help with feeding fuel to the pump -- remember that the tank is lower than the carb, so anything that can help with the feed to the pump is good. You can find the parts diagram in the files section here on Red Square. Thanks! I'll look into this. Any idea how long of a fuel hose I'd need? Share this post Link to post Share on other sites
varosd 1,185 #4 Posted June 18, 2018 I think it’s 54 inches? always get longer than you need i just tape the old to the new and pull it through. Might have to thread it through in a couple spots but does work 1 Share this post Link to post Share on other sites
Kurt-NEPA 755 #5 Posted June 19, 2018 3 hours ago, varosd said: i just tape the old to the new and pull it through. Might have to thread it through in a couple spots but does work I did the same thing on my 1988 520H. Had to coax it a bit, but the hose came right through. Share this post Link to post Share on other sites
TC10284 109 #6 Posted June 24, 2018 Thanks guys! I got it replaced. Was pretty easy. 1 Share this post Link to post Share on other sites