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case 450 dozer suction problems or charge pump?


 
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spudhillboy
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Joined: 18 Jun 2009
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PostPosted: Fri Jun 19, 2009 9:17 am    Post subject: case 450 dozer suction problems or charge pump? Reply to specific post Reply with quote

Looking to buy a case 450 dozer about in the mid 70s. Owner says if you park nose up hill it will lose prime and if you working the dozer and warmed up(hydro oil)it will loose suction when you ideal it down. Is it just an suction problem, charge pump bad hoses tc or transmission? Any info would be great. Also is their any weak points I should look foron the dozer? Thanks Aaron
 
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mEl
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Joined: 28 Sep 1998
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PostPosted: Fri Jun 19, 2009 5:08 pm    Post subject: Re: case 450 dozer suction problems or charge pump? Reply to specific post Reply with quote

If in good condition they are a great small dozer. As with any crawler the undercarriage condition is a major factor to consider. You can put more into replacing worn undercarriage parts and trackssprockets and carrier rollers than the price of a cheap crawler. Unless you are expert at the condition of these components please for your own sake have someone who knows how to gage pin and bushing and rear sprocket wear to give you an opinion. There is nothing more aggravating than putting a jumped track back on in the middle of a mudhole. My thought has always been that unless one can afford the upkeep of a crawler they should pass on owning it. That being said, the charge pump will cause that problem as will a suction line leak anywhere between the trans suction tube and the pump. The suction screen screws on a threaded fitting on the firewall and I have seen them loosen up and cause a suction problem. The heat related problem leans it toward a weak pump. the pump is located under the Generator or alternator and is easily replaced. Do not attempt to rebuild it as when the body wears the pump cannot be restored to new effeciency and the cost to repair will exceed the new cost. mEl
 
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Roger (Mi)
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Joined: 06 Feb 2004
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PostPosted: Sun Jun 21, 2009 4:24 am    Post subject: mEl is totally correct. Reply to specific post Reply with quote

Many years ago, I owned a Case 1000 dozer. If parked up hill or sitting for a week or more, the oil in the hydraulic pump that activates the transmission clutch packs would lose its prime. Tired of the aggravation of removing the suction tube from the pump and dumping in oil, I replaced the pump. Wow! No more problems.
 
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george md
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Joined: 22 Oct 2001
Posts: 2133
Location: Whiteford , Md

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PostPosted: Sun Jun 21, 2009 10:12 am    Post subject: Re: mEl is totally correct. Reply to specific post Reply with quote


Roger,

I have several 1000's , and rather than
replace the pump I replace the double lip seal
on the pump shaft and the problem goes away .
Also seal is much cheaper than pump.

george
 
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Roger (Mi)
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PostPosted: Fri Jun 26, 2009 4:03 am    Post subject: Replaced the 1000 with an 1150 Reply to specific post Reply with quote

Greetings George.
The 1000 dozer is a good machine. The four cylinder Continental diesel works well, but getting parts for the 1000 can be a hassel. Sold it and purchased an 1150 with a Case 401 engine. It's rated at 104 horsepower. Its responsiveness and power is a dream come true. It's good to know that a few of those critters (1000) are still out there and working. Roger
 
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