DRMCo D562D Engine ID

[Phil_C]

Hello All
I just purchased a 1973 DRMCo D562D with a Cummins engine in it. According to the specs for the machine the engine is a H-743C but I can't find any information about this engine. The engine looks a lot like a NH-220 but mine has all three manifolds on the same side. Exhaust, intake and water. Both are listed as 5 1/8" bore.

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On the second page the engine shown looks a lot like mine except the injector pump control is different and there is a massive fuel filter where the spin on filter is shown.

There is a tag near the injector pump that has model H-743C145 manufactured 2-73 s.o. no. 28847 engine no. 10324077 cpl 034 del Aug 31, 1973.

Did Cummins engines have options for where the manifolds are located? Even though all manifolds are on the same side the intake has a pipe that goes over the top of the engine to the air cleaner that is on the opposite side of the machine. Engine is NA.

I don't know much about Cummins. Worked on a lot of Cat engines and Perkins engines and some Fords but never Cummins.

Regards

Phil

 

[JAJ]

Hi Phil congrats on your new purchase! You could always post a couple pictures of it.
I have one of these graders as well that has been a project for a long time and just never get around to finishing it. Mine spun a bearing in the original engine and destroyed the crank (long story). I am part way through swapping to a later series, turbo NH 855 Cummins.
What specifically do you want to know about the engine??

IIRC the H series was earlier and the NH series was the upgrade. H series had 2 valves per cylinder, NH had 4.
The model : H-743C145
Would be: H (engine series)-743(displacement in cubic inches) C (construction application) 145 (horse power rating it was spec’d with)

The “injector pump” is actually a pressure pump and there was different governor types depending on if it was an on road engine or industrial spec engine. The injectors are fired off a seperate cam lobe in the head. It’s a “Cummins PT fuel system” and I think is the first “Common Rail” style fuel system.
The Drmco’s had that big cartridge style fuel filter and the little tank with a float on it before that. Ours used to run the fuel back somehow and often needed the canister to be manually filled if it had sat a while.

Anyway hopefully this might spark someone else’s memory and they might be able to tell me if my memory is correct or not

Regards
JAJ

 

[JAJ]

Just had a good look at the linked parts manual and it mentions the 2 vs 4 valves so my memory might be accurate.

 

[oldtom]

Hello All
I just purchased a 1973 DRMCo D562D with a Cummins engine in it. According to the specs for the machine the engine is a H-743C but I can't find any information about this engine. The engine looks a lot like a NH-220 but mine has all three manifolds on the same side. Exhaust, intake and water. Both are listed as 5 1/8" bore.

Cummins H NH 5 1/8 BORE 743 ENGINE PARTS MANUAL CATALOG BOOK DIESEL LIST 967108A for sale online | eBay

Find many great new & used options and get the best deals for Cummins H NH 5 1/8 BORE 743 ENGINE PARTS MANUAL CATALOG BOOK DIESEL LIST 967108A at the best online prices at eBay! Free shipping for many products!

www.ebay.com

On the second page the engine shown looks a lot like mine except the injector pump control is different and there is a massive fuel filter where the spin on filter is shown.

There is a tag near the injector pump that has model H-743C145 manufactured 2-73 s.o. no. 28847 engine no. 10324077 cpl 034 del Aug 31, 1973.

Did Cummins engines have options for where the manifolds are located? Even though all manifolds are on the same side the intake has a pipe that goes over the top of the engine to the air cleaner that is on the opposite side of the machine. Engine is NA.

I don't know much about Cummins. Worked on a lot of Cat engines and Perkins engines and some Fords but never Cummins.

Regards

Phil

black wood hodge sold the Brisbane City council 20 of these in the 70 all cummins engine

 

[Phil_C]

Hello JAJ
Thanks for the info. I contacted Cummins and they said the following;
"This engine is known has an NT743, the 145 in "H-743-C 145" marketing model name suggests it may have been originally rated at approx. 145hp". I asked where I could get a parts manual and they sent me a digital copy of the one in the ebay auction.
The reason I wanted to correctly ID the engine is twofold. Firstly when I purchase a machine I have to find all parts, workshop and operators manuals for the machine. Secondly I needed to remove the exhaust manifold to get to the water manifold which had two rusted out tubes that I had to replace. I then found the exhaust gaskets are the wrong ones and had been leaking. JAJ is correct this is a two valve engine which has the intake and exhaust on the same side and they also share gaskets..

Grader itself has a lot of issues that I am going to work through.
Left blade lift cylinder has leaking o-rings around the heads as well as leaking rod seals.
Scarifier cylinder tie rods have rusted through and cylinder has fallen apart.
Left bogey front axle bearings have collapsed.
Left bogey rear drive chain is broken.
Clutch is slipping under load. Previous owner ran it out of oil and then put sump oil in it.
Front wheel leaning cylinder has an issue. Previous owner welded blocks of steel in to hold it upright.
No brakes.
Cab has a fair bit of rust in it.

I am currently working on the collapsed wheel bearing issue and brakes but I am having a lot of trouble getting the rims off the hubs so I can heat the hubs and pull them off the shaft.

 

[JAJ]

Ah well you have a good project on your hands then. The rod seals should be a gland packing type IIRC and you might be able to tighten the bolts on the packing a bit or add more packing perhaps.
The parts are a bit hard to get for the Drmco’s now but “Phil Hunt Parts” has a few wrecked machines with good used parts and they were getting parts made or making them in house I think. They have a huge collection of manuals for all sorts of older machines I am pretty sure Brendan Hunt was telling me also, so if you get stuck at all could be worth a call. I have delt with them a couple times and they seemed very helpful.

 

[JAJ]

black wood hodge sold the Brisbane City council 20 of these in the 70 all cummins engine

That’s interesting. Our one has old SA rego plates so might be from that way originally. I know of 4 or 5 other 562D’s around here and one 600 I think it is.

 

[JaredV]

I am currently working on the collapsed wheel bearing issue and brakes but I am having a lot of trouble getting the rims off the hubs so I can heat the hubs and pull them off the shaft.

Someone on here ( can't remember who) has a neat method for getting hubs off. I don't know if I can remember the details, but it's something like you take a nut that fits the threads and weld a heavy chunk of steel to it that can take sledgehammer blows. Thread that onto the axle until the steel chunk comes tight on the end of it. Can't be touching the hub! Then start swinging a big hammer until the hub pops loose. Basically instead of pulling the hub, you're popping the axle out of it while the grader is holding everything for you.

 

[JaredV]

Found the thread.

https://www.heavyequipmentforums.com/threads/galion-brakedrum-removeal.32318/#post-1263868

 

[JAJ]

Well done on finding the thread!!
Sounds like a great idea, hopefully it helps OP out.

 

[Phil_C]

Hello All
Thanks for the replies and the method of hub removal.
After about six tries I finally got one off today. I tried a 30 ton puller with and without heat. I tried the method mentioned above both with and without heat and unfortunately it did not work. My 30ton cylinder is a hollow cylinder and today I made a shaft that goes through the cylinder and allowed me to give the end a hit with the sledge hammer. I assembled the puller on the hub pumped it up to 30ton and all it took was one hit with the sledge and off it came.