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Discussion Forum

Friend haveing problems with bulldozer

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mack molyneux

11-10-1999 16:42:06

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My friend has an Allis-Chalmers 1954 HD5 loader. 2cyl 2cy series 71. The motor is getting oil into air chamber. He has taken head off and had it checked out. Replaced gaskets and piston rings. Problem persists. If you have any insights, or know someone or somewhere I could contact, help would be appreciated. Thanks, MACK

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koeckeritz exc

12-05-1999 10:44:27

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 Re: friend haveing problems with bulldozer in reply to mack molyneux, 11-10-1999 16:42:06  
Make sure drain is open in bottom of blower box .Make sure oil bath air cleaner is clean ,and right oil is in pan /scrape all the dirt out of cup. The end seals on the bearings could be leaking or rings passing that much oil ..when running there should be air flow from drain tube if not make sure it is open ...someone screwed a plug into the one i have ....coke in MN

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11-10-1999 20:30:52

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 Re: friend haveing problems with bulldozer in reply to mack molyneux, 11-10-1999 16:42:06  
Reread your post, on A 2-71 the air inlet is on top of the blower so you will have limited access to seeing both rotors, might be able to see the top one,however.

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11-10-1999 20:25:45

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 Re: friend haveing problems with bulldozer in reply to mack molyneux, 11-10-1999 16:42:06  
Sounds like the blower seals are leaking, you can check these seals with the engine running by taking off the air inlet housing and screen, run the engine and shine A good strong flash light into the blower, direct the light toward the ends of the blower rotors, if they are leaking you will see oil streaming from the seals,be very carefull and don't get anything into the blower!!! if it isn't runable check the end plates around the seals to see if they are washed clean from leaking oil. Bad rings can cause this also however you indicated the rings were OK.

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Chad Wink

11-10-1999 20:18:00

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 Re: friend haveing problems with bulldozer in reply to mack molyneux, 11-10-1999 16:42:06  
Its probably the blower.

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11-11-1999 18:07:55

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 Re: Re: friend haveing problems with bulldozer in reply to Chad Wink, 11-10-1999 20:18:00  
2 cycle GM diesels also get oil in the wind box from the rings scraping the oil from the cyl walls and out through the ports and thence out the wind box drains, that is why this engine always drips oil even when they are in good shape.
Frank's 2 cents

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doug connor

11-13-1999 12:25:27

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 Re: Re: Re: friend haveing problems with bulldozer in reply to Frank , 11-11-1999 18:07:55  
I'm sure that this hasn't been overlooked but one other thing can cause this problem. If you haven't already you should change the air filter as this will also cause the same type of suction that the blower does when the emergency flapper is set.

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