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Garden Tractors Discussion Forum

Re: CC 1320 engine mount bolts lost out

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Bret4207

07-15-2014 04:57:29
64.19.90.196



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Pull the engine. Sorry, but trying to drill out a semi hard bolt from underneath...not going to end well. You need to accurately center punch the stub and drill with a sharp bit. EZ Outs might work, or not. If not it might be best to find a machine shop to get then out with EDM or something. The engine costs a lot more than the bill for getting them out.

I'd be looking to find out why they broke in the first place.

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Greenfrog

07-15-2014 20:45:03
75.98.177.35



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 Re: CC 1320 engine mount bolts lost out in reply to Bret4207, 07-15-2014 04:57:29  
My local CC dealer (CASE-IH) said to hoist up the front of the tractor...practically sitting it on end...they do in the shop...so that I can comfortably get to it... that works well.
Can see, drill, .....



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Greenfrog

07-15-2014 20:48:59
75.98.177.35



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 Re: CC 1320 engine mount bolts lost out in reply to Greenfrog, 07-15-2014 20:45:03  
I meant to add..the CC mechanic said that there is something strange going on here in terms of vibration. said to run it without the mower deck on and see if notice anything. Deck is already off...

Thanks all you guys for your thoughts and input .........



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Greenfrog

07-15-2014 10:08:30
75.98.177.35



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 Re: CC 1320 engine mount bolts lost out in reply to Bret4207, 07-15-2014 04:57:29  
Sorry. but educate me here. What is EDM?>



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joe csuti

07-15-2014 13:59:47
72.251.71.253



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 Re: CC 1320 engine mount bolts lost out in reply to Greenfrog, 07-15-2014 10:08:30  
I agree with bret about pulling eng,in addition I would NOT use loctite on bolts as from what you say it appears bolts go into tapped/blind holes in oil pan,if you use loctite on bolts & they break again you're going to have a heck of a job removing them from block,a better way is use a flat washer & lockwasher under bolt head.

Pulling eng may also work to your advantage as to possibe cause of bolts breaking as I can think of 3 possible reasons in addition to possible vibration from mower deck.

1-orig/replacement bolts were a little too long & needed a flat washer or two on each bolt & bolt was bottoming out in hole before bolt fully tight against chassis.

2-oil pan casting slightly warped & requires shimming at each mounting bolt.

3-warped chassis,at the factory chassis pan is probably stamped out of one piece of sheetmetal,this can be done in a press with a one shot die,progressive die,automated stamping machine or done in 2-4 operations in seperate presses/dies,I don't know how mtd does it.Looking at assembly drawing/parts list for tractor there appears to be a large clearance hole in chassis pan so eng can be installed/removed with drive pulley installed on eng,if setup man/press operator was a little sloppy in setting up die in press or punches in die were dull/needed replacement when the die opened after punching pan the metal may pull slightly as die opens & punches retract into die,this can cause pan to dome,cup or twist slightly,you might want to use a straight edge & go diagionally across pulley clearance hole & eng mounting bolt holes & check flatness of chassis pan,you might have to use shim stock/washers to level eng on chassis pan.

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Greenfrog

07-15-2014 20:41:46
75.98.177.35



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 Re: CC 1320 engine mount bolts lost out in reply to joe csuti, 07-15-2014 13:59:47  
Yes, the original bolts had flat and lock washers under the head.
You shed some new light on this. Seee my new post at the top...I broke an EZS out....



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