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Garden Tractors Discussion Forum

Re: CC 1320 engine mount bolts lost out

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Author  [Modern View]

07-15-2014 10:08:30

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Sorry. but educate me here. What is EDM?>

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joe csuti

07-15-2014 13:59:47

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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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07-15-2014 20:41:46

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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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