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Garden Tractors Discussion Forum

Re: CC 1320 engine mount bolts lost out

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joe csuti

07-14-2014 06:45:24

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The best way to find out bolt size/pitch is remove existing bolt & measure dia/pitch & length or if eng mounting pads not threaded & just a clearance hole see what size bolts will fit in hole(standard sae nc/nf thread & 3/8"-7'16" diam)if mounting pads threaded then you have to check existing bolt as to weather sae or metric,some mfg have gone to metric.

As far as locking nut/bolt after finding out length of bolt,diam & thread pitch use a nut & lockwasher that match bolt & use BLUE loctite or use an elastic locking nut & lockwasher in place of loctite,if you've lost bolts before this would indicate a hi level of vibration on mower possibly caused by bent blade spindles,out of balance blades,bad spindle bearings or some other mech problem on mower,try to locate source of vibration if possible.

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07-14-2014 19:42:39

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 Re: CC 1320 engine mount bolts lost out in reply to joe csuti, 07-14-2014 06:45:24  
Thank you for you valuable information. I worked on the tractor this evening. I happen to find the head of a broken off bolt laying on the mower deck. 5/16 fine thread. I hoisted the mower up chain hoist) got under it and saw that two of the bolts have broken off... ends still up in the engine housing. These would be stub bolts. I managed to get another bold into the remaining hole.... have two bolts in now. The bolt that broke off according to the markings for machine bolts, this is a no. 5 hard bolt!!!!!
How do I get the broken stubs out? Screw extractors? I hav them... but drilling from under the mower, on my back now, and then trying to do that. Yuk. any ideas ???
True , there must be some vibration here, although I don"t really notice much. but must be if it broke two hard bolts. !!!!

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