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Crawlers, Dozers, Loaders & Backhoes Discussion Board

Re: New issue with my JD 450c


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Posted by jdemaris on April 11, 2014 at 04:47:05 from (70.194.10.202):

In Reply to: New issue with my JD 450c posted by njthor on April 11, 2014 at 04:19:25:

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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