acmoc

ACMOC Membership Benefits

  • FREE quarterly magazine filled with content about antique Caterpillar machines
  • FREE classified listings
  • ACMOC store discounts and specials
  • Full Bulletin Board Access
    • Marketplace (For Sale/Wanted)
    • Technical Library
    • Post attachments

$44 /year ELECTRONIC

$60 /year USA

$77 /year International

D4D STATUS.

More
3 years 7 months ago #221737 by rehpig
Going to look at a stuck D4D 78AXXXX. Head is off. All cylinders are on the bottom of the stroke. No signs of water in oil pan. Major crank failure???? Availability of parts ok? Said to have good undercarriage. Any advice would be greatly appreciated. This winter project. What engine would be in this machine? Does roll.

Please Log in or Create an account to join the conversation.

More
3 years 7 months ago #221741 by JackD6-5R
Replied by JackD6-5R on topic D4D STATUS.
I have had an early D4D 78AXXX for about 10 or12 years. Not sure about parts avalability , I haven't needed anything but filters. I don't use it very much, easy tractor to run, would buy it again. Allmost forgot ,broken rods or crank pistons should not all be at bottom.

D4D D65R D73T 933C HT4 955H Gardner Denver comp.318 Cat.

Please Log in or Create an account to join the conversation.

More
3 years 7 months ago #221742 by Old Magnet
Replied by Old Magnet on topic D4D STATUS.
Evolution of the 78A.....
Attachments:

Please Log in or Create an account to join the conversation.

More
3 years 7 months ago #221836 by rehpig
Replied by rehpig on topic D4D STATUS.
Looked it over. Looks like a new set of tracks and chain would be in order. Does appear to have the forward and reverse lever on far right of cab. That does not seem to move. (Don’t know about this so maybe it has to be running. Right brake froze. Steering clutches do actuate and all linkages move. Left brake moves but doesn’t spring back. Transmission group number is 4k503. Serial number is 78a5673. Transmission does shift as it should in the center and right quadrant. Far left quadrant I could not get it to go into gear without pushing harder...which I did not do. Head is off. Cylinder 4 seams to have metal on sleeve... I could not scrape it off with my finger nail. Other three sleeves seem reasonable and have pb blaster sitting in them. Here is a pic of the head

Please Log in or Create an account to join the conversation.

More
3 years 7 months ago #221844 by Old Magnet
Replied by Old Magnet on topic D4D STATUS.
What does the rest of the machine look like? Engine is a D330A - 4-1/2" bore. Why was it torn down?
If machine appears beat up check for cracks in the main frame to steering clutch case mounting, otherwise doesn't seem too far gone. If it needs undercarriage scrap price less transport cost would be in order.

Please Log in or Create an account to join the conversation.

More
3 years 7 months ago #221847 by rehpig
Replied by rehpig on topic D4D STATUS.
Machine not too bad looking. Motor was stuck. Head removed. Other than tracks most of tractor has good original paint. Will check if cracks exist. Offered $750

Please Log in or Create an account to join the conversation.

More
3 years 7 months ago #221854 by SteveBudke
Replied by SteveBudke on topic D330A engine
I have a D330A industrial engine, complete, running take-out best I remember. Just barred it over freely.
s/n 56B1838. Set up for marine generator Cylinder block casting #7M4300. Located near Cincinnati Ohio
Priced VERY affordable. Steve 513 325-6934 or <a href="This email address is being protected from spambots. You need JavaScript enabled to view it." target="_blank">This email address is being protected from spambots. You need JavaScript enabled to view it.

Please Log in or Create an account to join the conversation.

More
3 years 6 months ago #221936 by rehpig
Replied by rehpig on topic D4D STATUS.
Is it “NORMAL” to get your engine before the dozer? Here it is cleaned up and sitting in my semi cleaned shop. Thank you Steve Budke! I am picking up the dozer Tuesday morning!
Lots of questions still left to be answered. When the D4D arrives I’ll drop the pan and see what I have to work with. If the pistons are just stuck is there a problem with just removing the sleeve/piston/rod assembly? It’s surely still possible that an inframe would be my best route.
Then there is the new engine...marine generator engine. Hours meter showed 17844
Is this 1784.4 or 17844. Don’t know the maintenance history on it. Since it is out and sitting in my shop. Should I partially disassemble it and verify wear on mains/rods. Should I remove the head and have the valves done and resurfaced? This engine has a turbo. Should I consider using it on the dozer? Will it fit?
Like I said LOTS of unanswered questions. . it’s going to be a fun project!!
Attachments:

Please Log in or Create an account to join the conversation.

More
3 years 6 months ago #221937 by gauntjoh
Replied by gauntjoh on topic D4D STATUS.

All cylinders are on the bottom of the stroke. No signs of water in oil pan. Major crank failure???? Availability of parts ok?.


Are you sure all pistons are on the bottom of the stroke? It looks to me that two maybe going down and two coming up and they are at the crossover point.

John Gaunt, ACMOC Director, UK

Please Log in or Create an account to join the conversation.

More
3 years 6 months ago #221938 by rehpig
Replied by rehpig on topic D4D STATUS.

Are you sure all pistons are on the bottom of the stroke? It looks to me that two maybe going down and two coming up and they are at the crossover point.


That I need to verify but that’s what I’m now thinking

Please Log in or Create an account to join the conversation.

Time to create page: 0.224 seconds
Go to top