deere 450 b left steering clutch sticks in reverse only?

vault · Dec 29, 2014

Was looking at buying a 450b with 6way blade. It steers fine in forward both left and right. I reverse however it will steer to the right but when I pull the left lever it shutters, bogs the engine and slowly turns (doesn't bring the left track to a stop like it does in forward). The seller said it was from sitting and may need a little adjustment :roll: but for the life of me researching this I can't come up with a logical reason why it would act this way only in reverse and perfectly fine in forward. The undercarriage was redone to some extent recently. owner said the final drive was redone and I can see the drive chain was redone as the measurement across 4 links is at 100% where the right side is -120%

Another question is with the blade raised up it will fall 3-4" in a couple of minutes with the machine running...is that a sign of any hydraulic issues??

Looking for any ideas as to what the cause might be.

JDemaris · Dec 29, 2014

I don't know why it's different in one
direction over the other. Maybe the brake band
has more self-energizing effect in one
direction. As far as the engine laboring does?
That's from the clutch not being fully
disengaged before the brake grabs. I'd pull off
the inspection cover and look inside. Make sure
it's not full of rust or oil. Also do some
adjustments.

Blade settling down is always a hydraulic
problem. Even leakage in the cylinders or in
the control valve. Minor leakage is a minor
issue.

Roy Suomi · Dec 29, 2014

The shuttering in the lever is normal if it has power steering.. There might be return springs off the brake band.. I've seen them act like that if the springs don't position the brake band correctly on the brake drum.. One right on the bottom and one hooked into the top cover..

vault · Dec 30, 2014

Thanks for the responses.
Sounds like the steering is:

worst case new clutch assembley.
Best case some rust that some use and adjustment can fix.Or due you think that the clutch not fully disengaging is pretty much a replacement issue. I just don't know why it disengages and turns fine in forward with no laboring of the engine or shuttering.

would you consider blade drift at the rate I described as a minor or major issue? I have a PC50 excavator that has some drift if it is not moving but it is constantly moving when in use. It seems to me that a dozer blade this would be more a issue because you want to set blade depth and angle and have it hold steady? Or am I not thinking of it right.

ET · Dec 30, 2014

The first thing I would do is run through the basic steering clutch and brake ajustment as outlined in the operators manuel. The clutch has to release before the brake starts grabing.

JDemaris · Dec 30, 2014

You need to determine if the steering clutches
EVER disengage. You say it works OK forward
but is that because the clutches slip or the
brakes aren't grabbing too soon?

Just put it in 2nd or 3rd gear, HL-R in H or L
and do this. Hold the clutch pedal down with
left foot and brake pedal down with right foot.
Then both steering clutch levers back. Then let
the foot clutch up. The engine should not be
laboring. If that goes OK then - with your
right foot still on the brake - slowly release
the steering clutch levers and see if the
engine starts to stall (assuming the brakes
hold). If not, the steering clutches are
slipping. If the brakes won't hold - test it in
a higher gear.

Now for a brake-timing test - do this. Park on
a steep hill facing up. Trans and HL-R in
forward. While climbing the hill, slowly pull
back both levers. There should be a point where
the clutches are disengaged, but brakes not
grabbing yet - and the machine will roll
backwards.

vault · Dec 30, 2014

ET- thanks for the response and I would absolutely do that if I owned the machine. but I'm looking at buying it and trying to determine what needs to fixed.

jdemaris- Thanks, I think that is a procedure I can do looking at the machine and will help me determine if it is out of adjustment or clutches failing and adjust my offer accordingly.

what about the blade drift as I described- blade raised up it will fall 3-4" in a couple of minutes with the machine running.

Is that a must fix to use the machine for grading a road and concrete pad foundations. My excavator has this drift but it doesn't effect the usefulness of the machine b/c the bucket is never held stationary. But I think it might be more a problem with a bulldozer b/c don't you want the blade to hold stationary to maintain grade? or are you constantly adjusting it anyway?

ET · Dec 30, 2014

There are most likely worn cylinder packing's so an
internal leak allows the blade to settle.

deere 450 b left steering clutch sticks in reverse only?

vault

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JDemaris

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Roy Suomi

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vault

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ET

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JDemaris

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vault

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ET

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