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Difference between a Cat 12 9k and Cat 12 8t grader

Difference between a Cat 12 9k and Cat 12 8t grader

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Diggerdozer
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I have a Us 7 fleet Cat 12grader , serial number 535 which is pre 9k so I am lead to believe but looks the same.

Can someone help with the differences between the 9k and 1947 8t graders tandem drive.

wondering what parts would be the same?

thankyou
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Mon, Nov 18, 2013 4:08 PM
ccjersey
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About 25 les hp (D4600 engine 75 hp instead of the D318 @ 100 used in the 8T series)

Generally lower speeds in every gear with top speed being less than 16 mph vs a little less than 20 on the 8T.

There are probably other changes in parts between the two, but very similar graders. Most likely where there are differences in internal parts of a component like a gearbox for example, if you swap the whole box, you may be able to interchange. I don't have any parts books to compare directly though.
D2-5J's, D6-9U's, D318 and D333 power units, 12E-99E grader, 922B & 944A wheel loaders, D330C generator set, DW20 water tanker and a bunch of Jersey cows to take care of in my spare time😄
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Mon, Nov 18, 2013 7:46 PM
Old Magnet
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Reply to ccjersey:
About 25 les hp (D4600 engine 75 hp instead of the D318 @ 100 used in the 8T series)

Generally lower speeds in every gear with top speed being less than 16 mph vs a little less than 20 on the 8T.

There are probably other changes in parts between the two, but very similar graders. Most likely where there are differences in internal parts of a component like a gearbox for example, if you swap the whole box, you may be able to interchange. I don't have any parts books to compare directly though.
If it were pre 9K, tandem drive and diesel it would be #11 6K series with D6600 (3-cyl) engine.
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Mon, Nov 18, 2013 11:07 PM
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