kylemorley
Member
Can a loose crankkshaft pulley imitate bad main or rod bearings? My 8n has been making a hollow tap tap tap noise on starting which then quiets though seems to be getting worse. I have been assuming was bad bearings, but I disconnected the fan belt and found the noise went away - almost completely. Poking around I notice that the crank pulley is loose, with maybe 1/6" back and forth, and a degree or two of rotation. Could that be the trouble?
Interestingly enough, for a tractor that would foul amost immediately if it didn't catch right away. thatI thought was due for a new top end several years ago, itcompression is now up to 135 psi wet/140 dry and burns negligable oil. Oil pressure goes up to 20 almost immediately upon catching, then continues up to 40, settling down to 35 or so at fast idle once it warms up.
Oh, any tricks on tightening the crank pulley? mine doesn't have the ratchet and is just a bolt though with a slot in the bolt head to engage a drag link-type big screwdriver blade, but it doesn';t seem to want to turn either way either.
Interestingly enough, for a tractor that would foul amost immediately if it didn't catch right away. thatI thought was due for a new top end several years ago, itcompression is now up to 135 psi wet/140 dry and burns negligable oil. Oil pressure goes up to 20 almost immediately upon catching, then continues up to 40, settling down to 35 or so at fast idle once it warms up.
Oh, any tricks on tightening the crank pulley? mine doesn't have the ratchet and is just a bolt though with a slot in the bolt head to engage a drag link-type big screwdriver blade, but it doesn';t seem to want to turn either way either.
