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Go Back   Only Cub Cadets > Cub Cadets > CCC/MTD Cub Cadet built Tractors (GT)

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  #1  
Old 11-02-2022, 07:47 PM
Lincolnmania Lincolnmania is offline
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Default 680 Won't start.

The 680 I got for my friend won't start today. I thought the battery was weak so charged it and came back and still no start.
The driveshaft is very hard to turn. Could one of the hydro relief valves be stuck?
I drove this tractor off the truck a week ago.
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  #2  
Old 11-03-2022, 08:09 AM
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1711Cub 1711Cub is offline
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So I take it that i just won't turn over with the starter, even with a jump? If you suspect the hydro, quickly disconnect the driveshaft from the hydro charge pump end and see if cranking improves. If not, you could still have such a weak battery that even with a jump pack or cables, it won't crank the engine over. Could also be a weak starter.
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  #3  
Old 11-03-2022, 12:27 PM
Lincolnmania Lincolnmania is offline
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Default

Quote:
Originally Posted by 1711Cub View Post
So I take it that i just won't turn over with the starter, even with a jump? If you suspect the hydro, quickly disconnect the driveshaft from the hydro charge pump end and see if cranking improves. If not, you could still have such a weak battery that even with a jump pack or cables, it won't crank the engine over. Could also be a weak starter.
I cannot turn the driveshaft by hand
Battery was charged and tested.
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cub cadet 71 that my pop pop got new and gave me in 85......restoration just started
cub cadet 100......was a friends grandfathers, given to me in 93.. restoration almost finished
cub cadet 72, 150 dollar craigslist find, 38" deck, worker
cub cadet 127 basketcase, my dad bought in 84
cub cadet 71 beauty (formerly johncub7172's)
cub cadet 123, craigslist find

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  #4  
Old 11-03-2022, 12:36 PM
R Bedell R Bedell is offline
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Quote:
I cannot turn the driveshaft by hand
ALL, my Hydro Tractors are hard to roll the engine over, by hand.
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  #5  
Old 11-03-2022, 12:48 PM
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Starter gear is prolly engaged on the flywheel, turn the shaft anti clockwise and it should let the gear retract from the flywheel, if not you may have a mouse nest in there.
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Cub Cadet is a premium line of outdoor power equipment, established in 1961 as part of International Harvester. During the 1960s, IH initiated an entirely new line of lawn and garden equipment aimed at the owners rural homes with large yards and private gardens. There were a wide variety of Cub Cadet branded and after-market attachments available; including mowers, blades, snow blowers, front loaders, plows, carts, etc. Cub Cadet advertising at that time harped on their thorough testing by "boys - acknowledged by many as the world's worst destructive force!". Cub Cadets became known for their dependability and rugged construction.

MTD Products, Inc. of Cleveland, Ohio purchased the Cub Cadet brand from International Harvester in 1981. Cub Cadet was held as a wholly owned subsidiary for many years following this acquisition, which allowed them to operate independently. Recently, MTD has taken a more aggressive role and integrated Cub Cadet into its other lines of power equipment.

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