450E reverse HLR pressure seems low

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94cobra2615
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450E reverse HLR pressure seems low

Post by 94cobra2615 » Fri Dec 17, 2021 12:57 pm

I was having issues with the dozer not pushing when the oil got hot

Found out the adjuster nut in the bellhousing had vibrated loose and almost ready to fall off.
I adjusted the HLR pressure and the dozer seems to move good now.

1.) Shifting into reverse the pressure gauge reads a lot lower than the H and L forward speeds. It still functions good but I didn't want to keep using it if the low reverse pressure would create a problem eventually.

2.) Also, i was unclear on the instructions. It states to adjust the clutch pedal free travel (which I have done), but it is unclear after the pedal adjustment and you begin to adjust the nut in the bellhousing.......is the engine at idle or ? to properly adjust?

If its suppose to be at idle I dont get anywhere near 180 psi. It goes to about 68psi. If I put it at half throttle it goes to about 185.

I have a manual and it doesn't say what speed the engine should be at.

B Town
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Re: 450E reverse HLR pressure seems low

Post by B Town » Fri Dec 17, 2021 2:10 pm

Earlier series are at 1500 rpm. I can’t say for certain with your E series

Jim B
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Re: 450E reverse HLR pressure seems low

Post by Jim B » Fri Dec 17, 2021 4:53 pm

On your #2 item. I am understanding you are talking about adjusting the HLR clutch valve nut adjustment. What manual do you have? I looked at my 450E manual (TM1330OP) for the procedure. Step # 5 says "With both gear shift and H-L-R Levers in neutral and brakes locked, start engine and run at slow idle." In # 6 they don't specify a pressure they say turn the nut in until it reaches a maximum pressure and begins to drop off.

Here is a picture of the page from my manual. Is that the same as yours?
Jim

Image

94cobra2615
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Re: 450E reverse HLR pressure seems low

Post by 94cobra2615 » Fri Dec 17, 2021 10:01 pm

Ah, yes. That is the same manual I have.

I missed the part "slow idle"

I'll have to readjust it tomorrow and see how the pressures behave.

94cobra2615
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Re: 450E reverse HLR pressure seems low

Post by 94cobra2615 » Tue May 17, 2022 9:14 am

Weather is getting good and I need to use the dozer.

Reverse quits pulling or barely works when the trans starts to get warm

H and L work great and push loads no problem even when the trans warms up

Everything seems to be adjusted properly

I changed the filter and cleaned the screen in the trans. Has all new trans oil.

Is there anything I can check or do to isolate what the problem is before I pull the engine and tear it apart?

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