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Old 10-12-2015, 10:06 AM   #15
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You'd be surprised how often some mechanics (not usually Technicians) will miss a loose belt. When that happens the pump will keep up if demand or energy needed to do the turn is normal. When it gets harder to move, like in a sharper turn sometimes a loose belt will slip just enough to keep it from working as it should.

Years ago a similar thing happened to a friend. He only would charge when idling. If he drove he had a full charge from the alternator. So he drove from Detroit to CO by parking in a rest area for an hour to charge the battery. After he got back he determined that the alternator belt was loose. Two different mechanics looked at it and never fixed it.

If the DP does not work like a gas engine then this may not be it but worth a check.


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Old 10-12-2015, 05:50 PM   #16
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Test by trying to turn alternator on stopped engine by the alternator fan by hand.

If it slips it is loose

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Old 10-12-2015, 09:58 PM   #17
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Lock to lock

Thanks again for info I figured out mine is so hard to turn without rolling or jacking up it is almost impossible installed new pump do you guys think it might need bleeding as suggested thanks
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Old 10-12-2015, 10:18 PM   #18
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I had that happen on our 2000 DSDP on FL chassis. Turned out the hydraulic system needed flushing and new fluid installed. It quit in the middle of a turn off the freeway into city traffic. Had to steer the rig though a 90 turn in a tunnel. Used both lanes and car drivers weren't too happy about it. Finally found a wide spot to pull over but it was a bad 2+ mile drive in city traffic to get there!
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Old 10-13-2015, 10:32 AM   #19
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First. Check tire inflation (Scale first) and lubrication of front steering stuff.. Next, Make sure you have enough Power steering Fluid.

Now make sure the drive belt is working properly.

That's all the help I can give.

Home is where I park it!
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