They "Respline" Crankshafts

They "Respline" Crankshafts SPECIALTY/SERVICES Specialty/Services 27-5-38 If you've got a Deere 70, 720 or 730 tractor equipped with a diesel engine - or another Deere 2-cyl. model - you'll be interested in this ad we saw in a recent issue of Green magazine. Renaissance Tractor of Chehalis, Wash., has come up with a new process to repair damaged splines and adjust the nut threads on the crankshafts on Deere 70, 720 and 730 diesel tractors. "We do a lot of engine work in these tractors and have found they often have damaged splines. However, the journals and bearings are still good," says owner Albert Ulrich. "What we do isn't rocket science but it works. First we magnuflux the crankshaft to make sure there are no cracks in it. Then we use a lathe to turn down any bad spots before welding it back up. If there are cracks in the splined area we can often grind the cracks down and then weld on new material to build the damaged area up again. The lathe is then used to turn down the welded-on material so that it's round again. The final step is to cut in new splines." Ulrich says it typically costs about $500 to respline the crankshaft on a Deere 730. "A new crankshaft for this model costs about $1,300 so you can save a lot of money." According to Ulrich, Deere used this shaft design on a number of different models so the tooling and procedure they use can be applied to a wide vareity of Deere 2-cyl. tractors. He says they may be able to respline crankshafts on other tractors on a case by case basis. Contact: FARM SHOW Followup, Albert Ulrich, 120 Cabe Road, Chehalis, Wash. 98532 (ph 360 748-0026; email: Albert@renaissancetractor).

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