Possible HD16DP acquisition

Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic

   Greetings all. Who knew becoming a land developer would find me owning such a variety of heavy equipment but here I am again with my potential acquisition of an Allis Chalmers HD16DP-7748. I do not know for certain but I am going to put this around the 1967/68 vintage. It's certainly larger than my D6.

I went to check this bad boy out and it is in unbelievably great shape... everything works very well accept an issue with what I believe to be the transmission. The current owner explained that the unit would not move when he purchased it. Found the transmission dry... no fluid. They filled it up and that got it to moving. Over time it has retreated into a process of firing up the motor... than working the forward/reverse back and forth until the machine begins to move... initially it will move about 10 feet in both direction and then build up as you continue to cycle back and forth. Ultimately it will reach a point that it will move well for the day until such time you shut it down and let it sit. You then will have to repeat the process. I have ordered a complete set of manuals for it but do not have them yet. Thought I would look to see if there was an A-C old timer on here that could lend some pointers.
I have posted this info in other tractor sites and have others telling me to run... don't walk... away from this purchase.  Those that bother to explain why suggest parts are an issue.  I'm finding it hard to even walk away from this.  The unit is in very nice shape... all movements work very well accept the issue I spoke of above.  My primary purpose for purchasing is the monster rake on the back and a 4 way blade.  My current CAT D6 has neither and I am working a project that requires both.

Any comments?

Edited by hdokes - 21 Sep 2025 at 5:25pm

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
hdokes Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 21 Sep 2025 Location: Midwest Points: 2	Post Options Post Reply Quote hdokes Report Post Thanks(0) Quote Reply Topic: Possible HD16DP acquisition Posted: 21 Sep 2025 at 4:53pm
	Greetings all. Who knew becoming a land developer would find me owning such a variety of heavy equipment but here I am again with my potential acquisition of an Allis Chalmers HD16DP-7748. I do not know for certain but I am going to put this around the 1967/68 vintage. It's certainly larger than my D6. I went to check this bad boy out and it is in unbelievably great shape... everything works very well accept an issue with what I believe to be the transmission. The current owner explained that the unit would not move when he purchased it. Found the transmission dry... no fluid. They filled it up and that got it to moving. Over time it has retreated into a process of firing up the motor... than working the forward/reverse back and forth until the machine begins to move... initially it will move about 10 feet in both direction and then build up as you continue to cycle back and forth. Ultimately it will reach a point that it will move well for the day until such time you shut it down and let it sit. You then will have to repeat the process. I have ordered a complete set of manuals for it but do not have them yet. Thought I would look to see if there was an A-C old timer on here that could lend some pointers. I have posted this info in other tractor sites and have others telling me to run... don't walk... away from this purchase. Those that bother to explain why suggest parts are an issue. I'm finding it hard to even walk away from this. The unit is in very nice shape... all movements work very well accept the issue I spoke of above. My primary purpose for purchasing is the monster rake on the back and a 4 way blade. My current CAT D6 has neither and I am working a project that requires both. Any comments? Edited by hdokes - 21 Sep 2025 at 5:25pm

Sponsored Links

Eric B Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 09 Feb 2012 Location: British Columbi Points: 970	Post Options Post Reply Quote Eric B Report Post Thanks(0) Quote Reply Posted: 20 hours 1 minutes ago at 8:50pm
	It sounds to me that a screen for the oil pick-up is restricted and while the oil is cold and thicker it's short of oil to maintain pressure. As the oil starts warming up and gets thinner there is enough flow to keep everything working. I've never owned an HD16DP so I can't give any details but just sharing this principle because it has been the scenario with other equipment at times. Please let us know when you find the fix, thanks. I have owned 13 bulldozers over a few decades.
	Currently- WD,WC,3WF's,2 D14's B. Previously- I 600,TL745,200,FL9,FR12,H3,816 LBH. Earth has no sorrow that Heaven cannot heal!

HD6 Merv Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Access Joined: 03 Aug 2010 Location: New Zealand Points: 498	Post Options Post Reply Quote HD6 Merv Report Post Thanks(0) Quote Reply Posted: 5 hours 56 minutes ago at 10:55am
	Yes agree with previous poster; most transmission drive issues stem from transmission pump supply issues; and this applys to all crawlers and all makes. Blocked suction screens, collapsed suction hoses, suction air leaks etc. All just a prt of regular machine maintence. HD16DP was from all accounts a very good machine. Alot of parts as in all AC stuff 'can' be a issue; but alot of their engineering was standard SAE stuff too, not special just to 'me' stuff like cat can be at times. As in most machinery cases; alot of it depends on your/or your helpers, machinery 'nous' and abilitys
	tits tyres and tracks they all cost you money

Doughd16b Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 01 Sep 2022 Location: Nc Points: 32	Post Options Post Reply Quote Doughd16b Report Post Thanks(0) Quote Reply Posted: 3 hours 19 minutes ago at 1:32pm
	I can help you out sir, too much to type,252 916 2927 anytime

Doughd16b Members Profile Send Private Message Find Members Posts Add to Buddy List Bronze Level Joined: 01 Sep 2022 Location: Nc Points: 32	Post Options Post Reply Quote Doughd16b Report Post Thanks(0) Quote Reply Posted: 1 hour 7 minutes ago at 3:44pm
	Its a mid 1966 year model btw