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SD1500 starting problems

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kathol233
Join Date: Aug 2008
Posts: 11 nebraska
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster

2008-10-14          157245


I'm trying to find engine specs for a SD1500.
Mine starts really hard. I've removed the glow plugs, cleaned them and tested them and they are working. I've taken a compression test on the cylinders and they read 180 & 185. i installed a new 800 cranking amps battery but it still starts very hard. I have to glow plug it and try to start, reglow plug it and try and start again, and continue this until after about 10 tries it will start. Each time I try to start it it acts as if it will start and then it doesn't.

Any ideas!!! Someone told me that maybe the valves need adjusting.




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SD1500 starting problems

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candoarms
Join Date: Mar 2007
Posts: 1932 North Dakota
TractorPoint Premium Member -- 5 Tractors = Very Frequent Poster  View my Photos  Pics

2008-10-15          157258


Kathol233,

Do you have any idea what the compression test readings should indicate? Do you have a manual that tells you what to look for?

The reason I ask is because 180 to 185 lbs of compression seems quite low to me.

For many diesel engines (not sure about yours), the compression test should indicate somewhere in the neighborhood of 350 psi per cylinder, with no more than 25% difference between the highest and lowest readings.

In order to perform a compression check on a diesel engine, the injectors must be removed. Some manufacturers also recommend removing the glow plugs and plugging those ports.

With a proper diesel compression tester (up to 600 psi), you should then crank the engine over at least 5 revolutions, and then use the average of the 5 pressure readings.

Repeat this step for each cylinder. You may need to hook up a set of jumper cables to another vehicle, or a battery charger, as this test will sometimes drain a battery.

180 lbs of compression seem awfully low to me.

You can also perform another compression test using compressed air from an air compressor. Depending on the compressor you'll get about 120-200 pounds of air for this test.

WARNING.....

Injecting high pressure air into an engine can cause it to turn over. Disconnect all fuel lines, and keep your fingers and hands away from any and all moving parts. You'll also have to lock the engine's crank shaft so that it can't turn. Remove the radiator cap also.

Inject air from an air compressor into each cylinder. (one at a time) Do this only when each piston is at top dead center (TDC) on the compression stroke.

If you have a blown head gasket, you'll hear air leaking from around the top of the engine, or even see bubbles in your radiator.

If you have a bad exhaust valve, you'll hear air leaking from the exhaust pipe.

If you have a bad intake valve, you'll hear escaping from the air cleaner.

Hope this helps.

Joel ....


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