Can anyone tell me how old a 61g 1046 dozer would be. It has the 333 engine in it. I think it was used mainly as a ripper machine on hard material. What kind of hours would they have got out of the undercarraige. Hours on meter cant seem to be right.
All of the D7Fs I found were made in 1970-75, but I didn't see a 61g, maybe because it's military. I'll look in another book later.
Ritchie wiki says that the d7 f was made from 69 thru 74. They are a good source of info on dozers and such.
Hours could be right. Military buys tons of stuff that get little use. I did run a Cat dozer at FT Riley for a day, That was about 5 years ago. Don't know what model. It wasn't new, but appeared to have had an easy life.
I would not touch a 7F wit a 333 engine in it..... supposed to have an expensive/weak transmission..
A military D7F with a S/N of 61G1046 would have been built around 1971. The equivalent civilian D7F tractors to the military 61G S/No's are 94N1 to 94N5191. D7F tractor S/No's 94N1 to 94N5191 were produced from late 1969 to early 1972. There's no actual year-of-build record for these Cat military tractors, because they came off the production line along with the civilian D7F tractors. There are minimal differences between the 61G and the 94N series. The only major differences are standardised military filters, tie-down brackets and a few other military specification requirements, typically such as alternator type and lighting. 61G1046 is fitted with the 4.75" bore D333 engine, the predecessor to the 3306. The tractor is fitted with the "early type" D7E low-speed, high torque transmission. These planetary transmissions operate at low rotational speeds and carry high torque loads. As a result, these transmissions are not as reliable or cheap to run as the later D7F's (94N5192-up), that are fitted with the 2P series, high speed, low torque transmission, that is identical to the D6C transmission. When the D7F drivetrain was modified at S/N 94N5192, the D6C transmission was fitted, and the reduction gearing on the rear of the transmission housing was changed to allow the transmission to run at much higher rotational speeds. Despite the 2P transmission being smaller than the early type D7E transmission - because it rotates at high speeds with low torque loads, it is a far more reliable and cheaper-to-maintain transmission. The undercarriage on a D7F should provide around 5000-6000 hrs service before it is worn out and scrapped. Usually, dry pin and bushing life is around 1250-1500 hrs before they need to be turned - then a new set of pins and bushngs can usually be fitted at around 2500-3000 hrs. Undercarriage life depends on the soil types the tractor has been operating in, and how abusive the operators are. You cannot believe any military hour meter, the military swaps components in equipment about as often as you change your shirt. It's entirely likely the engine, the transmission and some of the other components are not original, and have come from other tractors. If a military tractor is working and develops a major problem, the military will pull an engine from a newer parked tractor to keep the other tractor going. Then the parked tractor will get a reconditioned engine as a replacement.