Ryan Petrolhead Posted July 28, 2019 Share Posted July 28, 2019 Hi I have got a perkins 4.236 diesel engine with LD start number which I believe was mainly used in massey ferguson tractors and other plant. I want to turn the engine over by hand to see if it is seized or not and was wondering does anybody know what size socket I need to turn the crankshaft over. I've read somewhere that people have tried to turn it over using the flywheel and pry bar but this could cause damage. Any suggestions please. Quote Link to comment Share on other sites More sharing options...
rtbarton Posted July 28, 2019 Share Posted July 28, 2019 Put a couple of bolts in diametrical opposite clutch cover holes in the flywheel and use a bar between them. Quote Link to comment Share on other sites More sharing options...
cackshifter Posted July 29, 2019 Share Posted July 29, 2019 Also used in the Dodge 50. Quote Link to comment Share on other sites More sharing options...
rtbarton Posted July 29, 2019 Share Posted July 29, 2019 Plus Coles Cranes and Commer Walk-Through vans Quote Link to comment Share on other sites More sharing options...
Ryan Petrolhead Posted July 29, 2019 Author Share Posted July 29, 2019 Thanks for your advice about the use of flywheel, could I ask you do I need to turn flywheel clockwise or anti clockwise looking from the flywheel end. Thanks Quote Link to comment Share on other sites More sharing options...
rtbarton Posted July 29, 2019 Share Posted July 29, 2019 Anti-clockwise looking at the flywheel (clockwise looking at the crankshaft pulley) Quote Link to comment Share on other sites More sharing options...
Ryan Petrolhead Posted July 29, 2019 Author Share Posted July 29, 2019 ok thanks i will try that tomorrow. Quote Link to comment Share on other sites More sharing options...
Jamie_grieve Posted July 29, 2019 Share Posted July 29, 2019 You'll be fine if you just apply some mechanical sympathy to whichever method you choose. A pry bar on the ring gear can apply a huge amount of torque. If it's been sat for a long time pull the injectors out after loosening the two nuts on each side and pour oil into the bores. Don't put the injectors back in at this point!! Don't turn the engine without lubricating the bores. If it turns OK then use the starter to blow any remaining oil out before putting the injectors back in. Disconnect the fuel pipes from the lift pump too and have fresh diesel handy for starting it. Do not attempt to start it with the old filters connected as you may cause irreparable damage to the fuel system components. It'll probably have old CAV filters. What application is the engine for? Here's some manuals which are worth a look. http://www.moteur-perkins.com/uploads/catalogue/lettre/notice/manuel-perkins-ld-4-236.pdf http://www.endeavourowners.com/dscsn/info/manuals/4236M Workshop Manual.pdf Have fun and good luck with your project!! Quote Link to comment Share on other sites More sharing options...
Ryan Petrolhead Posted July 29, 2019 Author Share Posted July 29, 2019 Thanks for your advice. I bought the engine to put into a boat but never got around to it. I believe it came in a plant unit. I just want to make sure the engine hasn't seized after sitting in the garage for some time. Thanks again Quote Link to comment Share on other sites More sharing options...
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