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AC 25000MKII genset engine to truck |
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AC7060IL
Orange Level Joined: 19 Aug 2012 Location: central IL Points: 3340 |
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Posted: 17 Feb 2017 at 11:03am |
I got this home last night. The AC 25000 MKII engine has 860 hours on it. How many AC updates did this serial number receive or not receive? What all do I need to install this into a late 70s or early 80s Kenworth W900 - sae#1 bell housing, front engine mount, p-pump injection pump, different turbo, etc? Thanks in advance.
Edited by AC7060IL - 17 Feb 2017 at 11:36am |
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JohnCO
Orange Level Joined: 11 Sep 2009 Location: Niwot Colo Points: 8992 |
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Well first you've got to paint it purple!
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"If at first you don't succeed, get a bigger hammer"
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ACjack
Silver Level Joined: 13 Sep 2014 Location: Peoria, Arizona Points: 275 |
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Don't quote me on this but, it looks to me like it's pre 1974 cause that's when I became the inspector for the department that built the gen sets and other power units and there are a few things that are different. The reason I say that is it has the small luber finer bypass oil filter mounted on the front of the intercooler and I don't recall seeing those on the later units although it could have been an option. Check the option data plate that's on the block just above the oil pan rail. It lists all of the option/equipment groups that it was built with. Another item that makes me think it's an earlier unit is that the injection pump looks like a American Bosch pump and not a Robert Bosch pump that all of the latter 16000/25000 engines used.
As to truck use check for the 12 counter weight crankshaft that was used in the earlier truck engines. That crank was American made and some of the gen set engines (latter ones all got the 6 weight Japanese cranks). Seen an awful lot of the latter truck engines with the 6 weight cranks come back under warranty with busted crankshafts. Another difference between engines was the oil pans. Externally they may look the same but, internally they are baffled differently also they used cast iron and aluminum depending on use; get set, bulldozer, truck etc. And while on the subject of oil pans the one that's on your unit looks a bit odd in that it has what looks to be a pipe plug in the side up high by the front. Maybe another indicator that it's an earlier unit. Its been quite awhile since I looked at those things on a daily basis. |
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DougG
Orange Level Joined: 20 Sep 2009 Location: Mo Points: 8106 |
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[Those bastards are heavy ain't they! I got one I'm putting in a Dodge Bighorn,, need a few heavier lifting devises! Does yours have the liquid cooled exhaust manifold?
Edited by DougG - 17 Feb 2017 at 5:48pm |
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Acdiesel
Orange Level Joined: 15 Jun 2012 Location: Rochester Ohio Points: 2546 |
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looks like its going to be an awesome project.
dan
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D19 diesel,D17 diesel SER.3 D14 NF,D14 WF, D15 SER.II wf
D15 SER.2 DIESEL,D15 ser.II nf D12 SER.I, D10 Ser.II 2-720'S Gmc,caterpillar I'm a pharmacist (farm assist) with a PHD (post hole digger) |
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LeonR2013
Orange Level Joined: 01 Jan 2013 Location: Fulton, Mo Points: 3500 |
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Didn't they also have a lot of injector trouble at the start because of the variable RPM in truck use? But, once right they were a bear.
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ACjack
Silver Level Joined: 13 Sep 2014 Location: Peoria, Arizona Points: 275 |
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To the OP; could you post a few more pictures? Such as the option build data plate and the other side of the unit.
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AC7060IL
Orange Level Joined: 19 Aug 2012 Location: central IL Points: 3340 |
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Thank you all for your comments.
John(CO), Yes, it will be sharp looking painted Purple. DougG, Yes, it is extremely heavy as a genset unit. I hired a semi-truck wrecker to boom it up onto my trailer. My AC706B forklift (6000 lb capacity) could lift up one end, pull it on it's skids, tilt it with it's forks, but would not lift it vertically. Serious weight! Acdiesel, Yes, I'm very excited for this project to be going forward. LeonR2013, I'll need to research the injectors further. I'm assuming much of it's fuel system is limited base on the genset's constant run application?? ACjack, Here are the photos you requested. |
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AC7060IL
Orange Level Joined: 19 Aug 2012 Location: central IL Points: 3340 |
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This is the fuel injection pump ID tag.
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AC7060IL
Orange Level Joined: 19 Aug 2012 Location: central IL Points: 3340 |
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This is the Oil Pan's decal.
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AC7060IL
Orange Level Joined: 19 Aug 2012 Location: central IL Points: 3340 |
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This is a photo of it's right side.
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AC7060IL
Orange Level Joined: 19 Aug 2012 Location: central IL Points: 3340 |
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DougG, I don't think it has an exhaust manifold cooling, but I'm still learning - so please advise. It's coolant housing comes up from it's water pump and runs back the right side of the engine block just under the exhaust manifold. I take it that it is plumbed into the side of the engine block only (sleeve/pistion part of block)? Maybe it is plumbed into the heads?? I'll need to examine it closer. Maybe you can tell from photos? It also is plumbed into the oil cooler.
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darrel in ND
Orange Level Joined: 22 Nov 2009 Location: Hebron, ND Points: 8633 |
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Wow, neat project going on here! I love it. Darrel
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AC7060IL
Orange Level Joined: 19 Aug 2012 Location: central IL Points: 3340 |
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Here is my AC706B forklift, set to try and lift it vertically - RIGHT. Man, was I dreaming.
Prior to transport, I tried to research online the weight of the genset unit. There is not much info available for this older stuff. I did find some pdf of Onan/Allis 516 or 685 weighing around 5100 lbs dated 1979, and then Onan/Cummins 855 weighing 6100lbs dated in the 1980s. Anyway, I finally phoned Gateway Industrial (the company that initially sold it) and they could not put their hands on specs sheet because of it's age. Said they'd have to search archives. They told me the Onan generator is a 250KW level and to figure maybe 12,000 lbs. I think thats high cause my AC706B would probably not been able to lift one end much less drag it across the rock lot on its skids. The seller of the genset was impressed that my AC706B had a hydraulic safe limit so it would not lift something bigger than it could stabilize. Hats off to AC for doing a great job building safety into it's equipment. |
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ACjack
Silver Level Joined: 13 Sep 2014 Location: Peoria, Arizona Points: 275 |
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darrel in ND
Orange Level Joined: 22 Nov 2009 Location: Hebron, ND Points: 8633 |
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When I worked at an implement dealership, there were two 706 Bs for use around the lot and in the shop. Never have seen anything as used and abused as those two forklifts, and still hold together and do what was asked of them. Tough built units. Darrel
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ACjack
Silver Level Joined: 13 Sep 2014 Location: Peoria, Arizona Points: 275 |
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ACjack
Silver Level Joined: 13 Sep 2014 Location: Peoria, Arizona Points: 275 |
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ACjack
Silver Level Joined: 13 Sep 2014 Location: Peoria, Arizona Points: 275 |
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AC7060IL
Orange Level Joined: 19 Aug 2012 Location: central IL Points: 3340 |
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ACjack - Yes, a magnet sticks to the oil pan. Would any of the catalog numbers on the Order ID tag tell if it has the 12 weight crankshaft?
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ACjack
Silver Level Joined: 13 Sep 2014 Location: Peoria, Arizona Points: 275 |
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Yes, and here's how we'd go about getting the crankshaft part number in the master catalog that I mentioned. 1st we'd look up the catalog number for the engine (4390848); and on that page it would list the group numbers for all of the sub assemblies that make up the 4390848 engine assembly. We'd then take the group number for the crankshaft assembly and then go to that page and on that page you'd find a list for all of the parts that make up the crankshaft assembly "IE" part numbers for the bearings, any plugs, dowel pins, gears and the part number for the crankshaft. It wouldn't give you a description of the crankshaft. although at the time they were only using 2 kinds of crankshafts, the 12 counter weigh US made crank and the 6 counter weight Japanese crank. If my memory is correct the 6 weight crank went into the lower HP engines 16,000-21000 series and at some point (later build) I believe the 25000 series gen sets also got the 6 weight cranks. The catalog and group numbers were all listed consecutively so it was possible to move several feet either right or left along that 8 foot "book" to find the info that you needed. Computers, who needs them |
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LeonR2013
Orange Level Joined: 01 Jan 2013 Location: Fulton, Mo Points: 3500 |
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I believe, but not sure, that when we were looking to buy a couple of new trucks with this engine they told us dry weight was 3460# or somewhere in that neighborhood. And I think a 350 Cummins was around 2800. Quite a bit of difference.
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Jim Hancock
Orange Level Joined: 11 Sep 2009 Location: EL Reno, Ok. Points: 1112 |
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AC7060,
What was this used to power when needed? A hospital?
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How blessed we are by HIS GRACE!
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DMiller
Orange Level Access Joined: 14 Sep 2009 Location: Hermann, Mo Points: 31058 |
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Your biggest problem will be bellhousing/flywheel which are for industrial app not truck. The SAE truck bell housing would be tough to locate.
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AC7060IL
Orange Level Joined: 19 Aug 2012 Location: central IL Points: 3340 |
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Hospital |
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gemdozer
Orange Level Joined: 17 Sep 2009 Points: 987 |
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I had 2- 25000 motors and am still have a couple pieces like a turbo,fuel pump and more
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AC7060IL
Orange Level Joined: 19 Aug 2012 Location: central IL Points: 3340 |
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