What is a Cat D4D worth??

Sounds like a good one to take a look at, if it checks out to be in good shape, it could be worth top dollar for that era D4. Link attached for similar D4's up for sale, but the prices mean nothing, it's what your willing to pay for a tractor that should be close to field ready condition with a decent undercarriage, something you know you will get satisfactory hours of performance from. No gaurantee and it's smart to really check any type of crawler out thoroughly, you may be surprised at what you may find, contrary to what a seller describes.

You really should measure the undercarriage, check the sprockets and make sure they are tight on the dead axle, dip a magnet into the final case check for metal chunks or heavy concentration of metal particulates, make sure the motor is in good operating condition same with drive train, is it direct drive or powershift ? Run it for a few hours or demo it if at all possible, see what's what when it's up to operating temperature. Check fluid condition all around, coolant, oils etc. Look for cracks on the track frames or poor weld repairs etc. You may already know this, but they seem to bring a good dollar still, so best to really check it out first, hopefully it is as advertised, always liked that series, not aware of any model specific issues for those, maybe some one else has better knowledge on them mechanically.

• Machinery Trader

I have seen people spend ridiculous money on worn out tractors, that if they did check out thoroughly before making the deal, they might have walked away, hence my advice to check them out thoroughly and get information like what O.M. mentioned about the 78A series. Good to collaborate with someone who knows them well like a heavy equipment mechanic who has worked on them when possible.

Direct drive with oil bath type clutch, thought those were in the bullet proof category, if you are trying to make an offer, and need to come up with a decent figure see what others of the same years, condition, and serial numbers are listing for in as many places you can find them for sale and in the reference books for resale values.

It's hard to comment on a realistic price, without seeing and looking over the tractor in my opinion. Look at machinery trader with a grain of salt as privately held equipment like this can be worth a lot less to someone and or some of the asking prices for the real older tractors listed there appear to be ridiculous for the condition they are in.