Newholland 638 roundbaler pto shear bolt

rick n ohio · Jun 30, 2019

Does anyone know what size the pto shear bolt is for the 638 round baler.dealer is one and half hour away thought maybe I could get by with a bolt from the hardware store.it is just barely smaller than a 1/4 bolt grade 5 is what I'm looking for I think it's a metric bolt but not sure thanks.

GarryinNC · Jun 30, 2019

I worked on a 634 and I think it was a 6mm metric. That takes a 10mm wrench. Metric bolts that are stamped '8.8' on the head are the same as a SAE grade 5 in hardness.

Garry

rick n ohio · Jun 30, 2019

Thanks gary

JD Seller · Jun 30, 2019

There are 25.4 MM per inch. So 1/4/.250 x 25.4 =6.35. So Garry's is more than likely correct in it being a 6 MM.

rick n ohio · Jun 30, 2019

Thank you sir

Newholland 638 roundbaler pto shear bolt

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