View Full Version : Cat Power Unit 4D1060

12-04-2006, 06:31 PM
I have this engine that is from a Cat 44 pull type grader and it runs!! It is a single cyl. gas engine with a magneto and is air cooled. Its a heavy beast as it weighs 325 lbs.

Does anyone have one of these out there anywhere? Is it rare? I'll try and post a picture or 2 of it.

12-04-2006, 07:18 PM
see attachment:

I have a better pic but this site asked me to reduce it to 800 x 1200 so this is the best I can do on short notice.


12-04-2006, 08:12 PM
Book shows the 4d---- as a power unit, used on the 66 and 77 grader.

12-04-2006, 08:48 PM
does your book give any specs such as HP, RPM, bore, stroke, etc. ?
also, anything on a governor, carb settings etc. Where can I find this info if not in your book?


bruce oz
12-04-2006, 10:02 PM
hello kellyb ,the motor fitted to the 44 single frame grader in 1937 was the g800.
bore=3''5/8 stroke= 4'' , hp =5.5 @ 1300 rpm ,sorry this is the only info i have ,hope it helps ,bruce oz

12-04-2006, 10:27 PM
Bruce oz, Information is the same as mine. The only thing I would add is at Sn. 4D1196 a further refinement had been made to the grader engine which would assist in preventing the entrance of dirt into the engine. A new cylinder assembly had been provided, which could be used on all graders that completely enclose the valve push rods. Hope this is a little more help. Maybe someone will show up with some more information.

12-05-2006, 07:06 AM
Kellyb, I've been told that the engine is indeed sought after, because it is missing on many of the surviving No. 66 pull graders. GWH

12-05-2006, 11:51 AM
to gw75 diesel,

I may be interested in selling it, yes, would the best way be to post it on this website?

or ebay it?


12-05-2006, 12:37 PM

12-05-2006, 03:14 PM
The maintenance instructions for the single cylinder G800 engine (the smallest gas engine built by Cat), are found in the Operation and Maintenance Instructions booklet for the Power-Controlled #66 and #77 pull graders.

The OMI form number for the Power Controlled #66 grader, S/N 5E1-up, is 3226 .. and form number for the P.C. #77 grader, 9C1-up is 1663.

12-05-2006, 03:45 PM
Bruce - The G800 is listed in the 1936 pull grader catalog as being 8HP, not 5.5HP .. and this catalog lists the #44 and #66 as being the only P.C. grader models available.

Despite the fact that G T Barnards Caterpillar Product Guide book states that the #77 pull grader was built until 1942 .. there is no mention in the comprehensive 1936 pull grader catalog, of the #77 pull grader.
The catalog lists only the #66, #44, #33, and #22 graders, plus the Trailer Patrol grader and terracers.


12-05-2006, 08:38 PM
Should I let you guys know if I list it on ebay, what would be a good reserve price?


12-07-2006, 04:39 PM
The Cat SNID book right from Cat lists a 77 Grader & has a SN of 2A & up & the starting production of it is listed as 1930. That,s all I have on it.