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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

New OC-3 (picture) Plenty of Questions

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550Darrin

04-01-2007 14:22:41

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My apologies to those who have read this on the Oliver forum. Just trying to get a good sample of advice. . .

Well, I'm past the giddy stage of a new tractor aquistion and it is now time to see how much TLC this old girl will require.

Fluids: I pulled the plugs on the drifferentail/transmission and found 1.5 gallons of water (not milky oil - H2O) and a quart of sludge.

The manual calls for SAE 40 in the diff/trans - Is there a better choice 50+ years later?

Engine Oil: Same question, manual calls for SAE 30, anything better to use today?

Speaking of Engine Oil: Anyone have a Oil Filter brand/number that works?

Speaking of brand/part numbers: Anyone have a suggestted spark plug?

Final Drives: Manual calls for SAE 40. Oil of choice in 2007?

Lastly, does a guy need to watch out for detergent vs. non-detergent oils in any of these applications?

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550Darrin

04-01-2007 19:25:10

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Re: New OC-3 (picture) Plenty of Questions in reply to 550Darrin, 04-01-2007 14:22:41

Thanks for the reply jdemaris. Your advice and knowledge make a lot of sense. I will seek out some GL-1.

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jdemaris

04-01-2007 15:57:03

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Re: New OC-3 (picture) Plenty of Questions in reply to 550Darrin, 04-01-2007 14:22:41

The SAE 40 viscosity figure they are giving you is an engine-oil visc. spec. - not transmission. 40 weight engine oil equals 85-90 weight transmission oil - they are the exactly the same viscosity. The main thing is not the detergency, it's the EP additives. The oil you put into the transaxle cannot have any EP additives - so you cannot use modern GL-5 type gear-oil. GL1 is fine if you can find it, but straight 40 weight engine oil is often the easiest to locate - and if you get non-detergent it usually won't have any EP additives - such as zinc or phosphorous. The problem with the EP addivies is - your 3 speed transaxle is made by Clark Co. - model A-30 and uses brake-bands for steering. They control the differential just like a wheel tractor with a left and right brake pedal. EP additives plug up the brake-bands something awful and then it won't steer. 30W engine oil is fine for the engine - HD or non-detergent - however . . . if the engine seems to be real dirty inside - and perhaps hadn't been used in the past with high-detergent oil, then you might be better off sticking with non-detergent. Otherwise, you're going to have sludge coming loose, inside the engine, for a long time. I suspect you're going to discover the crawler is too fast in 1st gear for pushing dirt very well - that's the problem with HGs and OC3s unless they have the optional auxillary transmission. If you put a aux. in it, it will run much better and the engine will last much longer - since you won't have to lug it and/or slip the clutch. Spark plugs for the Hercules IXB3 engine are - if they are 14MM - a Champion J6 or J8 works fine. If the larger 7/8" plugs, takes a Champion W14. Engine oil filter - NAPA 31102 or Wix 51102.

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