CLANK,CLANK,CLANK=$$$$$$$

T

TX720

New User

• Mar 30, 2009

• #1

I was mowing yesterday with my 9n and after about twenty minutes i heard the worst sound ever.CLANK,CLANK,CLANK,comeing from the front of the motor.The engine never died but i shut it down asap.That CLANK,CLANK sure sounded exspensive.Oh well,guess i will found out pretty soon.I cant really complain about a tractor thats almost sixety years old though.On a good note at least the JD 720 is still ok.

 

T

Tramway Guy

Well-known Member

• Mar 30, 2009

• #1

Sounds like a fan blade hitting something, maybe?

 

J

Jason1Pa

Member

• Mar 30, 2009

• #1

Sure it just isn't the fan smacking the fan shroud? Water pump could be going causing the fan to have a lot of play.

 

showcrop

Well-known Member

• Mar 30, 2009

• #1

Don't assume it's something big until you find out what it is. When my 900 did that it was just because the cable ties holding the top of the Honda radiator broke and it went into the fan. Another Honda radiator was only $15.00.

 

K

Ken-Pa

Member

• Mar 30, 2009

• #1

Check to see if you have any wobble on the water pump shaft . Then see if the fan blade is hitting the shroud . Has your front axle bolster ever been rebuilt ? It may be time to remove the front axle assembly & do a rebuild , which isn't that hard of a job . Just make sure you have the motor blocked up safely before starting the disassembly . HTH ! God bless

 

OP

OP

T

TX720

New User

• Mar 30, 2009

• #1

I will check it out this week when i get a chance.I will let you know.Thanks for the input.

 

H

Howard H.

Well-known Member

• Mar 30, 2009

• #1

Did you notice if the oil pressure was fluctuating at the time??

Drain a little oil out of the pan - you'll be able to tell in a hurry (flakes in the oil) if you threw a rod or spun a main bearing...

HH

 

J

jack harmon

Member

• Mar 30, 2009

• #1

clank sounds expensive,a clunk on the other hand..LOL..check crankshaft pulley also.ive seen them come loose and do some serious noise making.

 

OP

OP

T

TX720

New User

• Mar 30, 2009

• #1

Oil pressure stayed constant.I looked at the gauge right before i shut it down.

 

P

paul

Well-known Member

• Mar 30, 2009

• #1

I was thinking fan also, most internal things sound different, & don't last long enough to shut it off......


--->Paul

 

H

Howard H.

Well-known Member

• Mar 30, 2009

• #1

Especially if the oil is clean, too, I'd guess your problem something less serious - like the fan or pulley problem suggested...

Also, I've had a push rod get out from under the rocker arm before on an engine (not a tractor), and THAT will make a lot of noise, too!!!

You might also check the spark plugs to make sure they aren't all bashed up... A chipped valve, etc, getting into a cylinder will make a lot of racket (more thumping/knocking than clanking), but your plugs will show that in a hurry!!

Howard

 

A

Anonymous-0

Well-known Member

• Mar 30, 2009

• #1

Rocker arms are pretty rare on a flathead.

 

Goose

Well-known Member

• Mar 30, 2009

• #1

I had a water pump once make a clatter EXACTLY like a spun rod bearing. Didn't even leak.

 

S

Shetland Sheepdog

Well-known Member

• Mar 30, 2009

• #1

I THINK I know what the problem might be! :shock: Tractor's almost SEVENTY years old, not sixty! :? Sorta the same age as me! :shock: I go CLANK,CLANK,CLANK sometimes too, but I don't got no $$$$$$$! :lol: :lol:
8)

 

A

Anonymous-0

Well-known Member

• Mar 30, 2009

• #1

I had a 9N once upon a time and it made a sound just like that while I was raking hay. It sucked a sleeve down into the crankcase. It cracked all the way around the rim at the top of the cylinder and the piston pulled the sleeve down around the connecting rod and smashed it (the sleeve) up into little pieces. Just one of a number of memorable moments from my "N" ownership experience. Hope you are luckier.

 

T

techted

New User

• Mar 30, 2009

• #1

I had a an old suburban make the same sort of noise. When I checked things out, it had thrown all the belts.

May not be as bad as it sounded.

 

G

Gene Dotson

Well-known Member

• Mar 30, 2009

• #1

TX
Pull the engine oil drain plug and look for the nicely rounded pieces from the cylinder. The thin cast sleeves in the 9N'S and early 8N'S were known to work loose and be drawn into the crankcase. Clatter will only last a few seconds till all the pieces have cleared the crankshaft... Gene

 

H

Howard H.

Well-known Member

• Mar 30, 2009

• #1

I never farmed with anything smaller than a 6030 JD, so I don't know much about the little tractors in specifics...

That is interesting that they'll suck a cylinder down...


HH

 

M

Mike (WA)

Well-known Member

• Mar 31, 2009

• #1

I believe a clunk is generally much more expensive than a clank, but your results may vary.

Some dis-assembly required. Ask your parents to help put it together.

For my two bits worth, I think it involves fan/ shroud/ water pump pulley, or some combination of the same. Could be "much aclatter about nothing."