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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Re: New issue with my JD 450c

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Author  [Modern View]

04-11-2014 04:47:05

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You need to explain the problem with more detail. When you say the left track "does not turn" . . . is that with the left lever fully engaged (take your hand off of it)? The left side has nothing to do with the right side. It sounds to be that your left track hardly has any power - ever. You don't notice it until you take the power off the right track. Also . . what does "not turn" mean to you? You can turn slowly by declutching, or turn fast by declutching AND braking. Need more description. Each side has a clutch and a brake. If the clutches are slipping - the wet disks are probably ruined but it won't hurt to check the pressure to them. If the brakes aren't working - they're either worn out or out of adjustment. The "C" series was the first to have self-adjusting brakes. They worked terrible and were often disabled. If you want to test . . do this. Put the machine in 3rd gear. Hold your foot on the brake hard or put the blade against a tree (so the crawler cannot move). Have the macine in 3rd gear, low range with both steering levers held all the way back. Let the left one out slowly. You should be able to stall the engine. If not, the left is slipping. Then do the same with the right. To test the brakes do this. Park on a steep hill facing up. Must be steep enough to the crawler wants to roll backwards in neutral. Let it roll as you apply each brake, one at a time. See if each track stops. You can also do the same test rolling forwards if you want. To test clutch/brake adjustment . . park on a steep hill again , facing up. 2nd gear, L. Hold both levers all the way back with your foot on the brake. Let both levers out (towards the front) slowly. There should be a narrow spot where the crawler starts to roll and then a little further, it goes forward. That narrow spot - with no brakes and no clutch must be there. If not the clutch power fights against the brakes whenever you use the levers.

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