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Cat D6D

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Ron_NY

10-02-2002 05:00:57




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I am looking at buying a Cat model D6D, 1979-1980 vintage. It has 3200 hours on it, and has had the undercarriage rebuilt (currently rated at over 95%).

The only known problem is non-functional glow plugs. Current owner (5 years) bought it that way and never bothered troubleshooting the problem.

Is there anything special I should be looking at in this model? I would appreciate ballpark estimates of its value. Iron Planet site does not seem to have older models for sale/auction.

Thanks for your help and suggestions. Ron in Central New York

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ferrell freeman

10-03-2002 08:00:11




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 Re: Cat D6D in reply to Ron_NY, 10-02-2002 05:00:57  
Ron, you didnot say if mechine was a powershift or direct drive . If powershift would pull floor plates and check for hyd. leaks from torque converters . Would run the mechine for a hour or so under a load to make every works right .This will give all hyds. a chane to warm up work right and no leaks or wore out pumps or tran.,final drive ,steering clutch problems. Also on the driect drive mechine you are able to master clutch and oil supply pump are working when at operating tempature. The water pump ,fuel systems ,and electrical systems are working .Then check the oil to make sure no water in it ,also check the water for oil after running the mechine.

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John

10-03-2002 06:25:34




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 Re: Cat D6D in reply to Ron_NY, 10-02-2002 05:00:57  
First of all i find it hard to believe that there is a D6D out there with just 3,500 hrs. I have 2 D6D's 4X series with over 15,000 hrs each and are still considered low houred machines for their age. It depends on the working conditions of the machine but with 3,500 hrs on it it should still be running the original rollers, sprockets, idlers, rails. I'd be weary of those hour clocks, as they are just for service intervals and they do break. The glow plug problem i run into many times with those 3300 engines. On the back of the engine where the wire plugs into the glow plug tube; that connection is prone to corrosion or could possible have vibrated loose. I could talk about this all day, but i hope this helps some. John

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Robert

10-03-2002 09:01:57




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 Re: Re: Cat D6D in reply to John, 10-03-2002 06:25:34  
I agree with John about the hours on this machine. The undercarrige usually will go 3,000 hours before the pins and bushings are turned depanding on the operator habits and footing conditions. The clock is for service intervals, and are not for total hours. The clocks do quit working and are easily replacedwith a new colck with 0 hours. Does he have any records on major component repairs. The 3300 series of engines do develop cracks in the counterbore in high hour engines and when run hard will start blowing coolant out of tha radiator and overheat. I just had CAT rebuild a 3306 in a D7G 92V (which is the same engine in the D6D 4X)with hairline cracks in the counterbore which cost me $17,000. A D6D with unknown hours and no major component records is worth ~$25,000. If it has a straight blade with hyd. tilt and ripper, ROPS it may be worth a little more. Take a magnet and check finals, finals can be pricey.

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G-MAN

10-02-2002 07:40:15




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 Re: Cat D6D in reply to Ron_NY, 10-02-2002 05:00:57  
Ron, if you decide to purchase the dozer, the glow plugs shouldn't be much of a problem, just like Bob said. They screw into the precombustion chambers and if memory serves, they will have a 3/8 or 7/16 hex on them to screw them in and out (I can't remember the size for sure). Either way, they're easy to test and easy to replace. We just used a switch and two wires, with one hooked up to the spade and one just grounded to the plug itself. Turn on the juice and they should get hot real quick. When installing them, make sure to put a good coating of anti-sieze on them.

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Bob /Ont.

10-02-2002 06:25:38




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 Re: Cat D6D in reply to Ron_NY, 10-02-2002 05:00:57  
Ron the glow plugs work off of the HEAT/START switch. They should be powered when you turn the switch to heat/left and when you are cranking/right. The wiring is simple, look for a heavy purple wire pulled off the glowplug loom/assem. Each plug should draw 5 amps(30 amp on 6 cyl)any less and some aren't working. The plugs should be kept in good condition as they can breakup and go into the cyl.
Later Bob

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Half Track

10-02-2002 05:32:42




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 Re: Cat D6D in reply to Ron_NY, 10-02-2002 05:00:57  
Ron, you haven't listed enough info about the D6D to place a value. Like ORORS or EROPS, ripper or not, S-blade or angle. What is a rebuilt u/c? By this I ask what got worked on & maybe what didn't. A value, say $30 to $45,000.00. On the onset, the glow plugs is, to me, no big deal. Not much help I know, but you need to fill in the blanks, HT



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Ron_NY

10-02-2002 05:52:49




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 Re: Re: Cat D6D in reply to Half Track, 10-02-2002 05:32:42  
I am not sure about the acronyms ORORS or EROPS. The operator area has a covered cage, including rear screen. The rest of the unit has a cage around it. Undercarriage work included new pads, turned pins, etc.

I don't believe that the blade angles, let's assume it only operates as a straight blade.

There is no ripper, just a large connection for pin at rear.

I hope this fills in some of the blanks. Thanks for your help. Ron in Central New York

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AJ

10-05-2002 15:26:50




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 Re: Re: Re: Cat D6D in reply to Ron_NY, 10-02-2002 05:52:49  
You cannot go wrong with the D6D it is a great dozer capable of doing big work as well as small the blade may be a tilt blade,if it is it will not have a U frame but two straight push arms from each corner of the blade to the track frame in front of the sprockets.if it is an angle blade it will have a U frame and the blade will be mounted on to it with a pin in the centre and a swing arm on each corner with a three hole option to locate in the U frame to the angle required
Good luck
AJ

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