450B shifting speed

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timmtnman
440 crawler
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450B shifting speed

Post by timmtnman » Mon Sep 14, 2020 5:15 pm

What is the easiest way to adjust the shifting speed on these. Shifts instantly now without any delay. To fast and hard on my neck. I have to use the clutch when going forward and backwards. From high to low isn't that bad.

Mikeforester
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Re: 450B shifting speed

Post by Mikeforester » Mon Sep 14, 2020 5:55 pm

Hi,

If you have the H-L-R transmission you need to adjust the main clutch free-play first (check your manual for proper spec), then adjust the shuttle shift. You will need a pressure gauge to tap into the pressure port under the transmission cover bung. Adjuster is on the top left side of transmission under the rubber plug (vertical bolt with a nut). You need the manual to adjust to specs. Don't make it too slow as you can overheat the clutch packs due to slipping. It should shift crisp and firm when correct. Good transmission when adjusted and working right, a nightmare to fix.

Mike

Jim B
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Re: 450B shifting speed

Post by Jim B » Mon Sep 14, 2020 5:55 pm

Do you have the Technical Manual TM1033 for your 450B? The adjustment procedure is in the manual and there are a couple others they say to do first. If you don't have a copy there is one on line you can download for free(one of very few). Here is a link to the site it is on. https://archive.org/details/John_Deere_Company . If the page opens the same for you, as it does for me, the manual is center, top row. Click on the manual and when that page loads scroll down a bit and on the right you will see several options of download formats you can chose from.

timmtnman
440 crawler
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Re: 450B shifting speed

Post by timmtnman » Tue Sep 15, 2020 3:00 pm

I do have a manual but have not looked at it yet. It does shift firm and crisp to me, it will jerk you around pretty good. It changes instantly when you shift it. Not sure if it is supposed to be like that or have a short pause in it. It is a HLR. Reverse neutral high then low.

Jim B
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Re: 450B shifting speed

Post by Jim B » Tue Sep 15, 2020 4:15 pm

It is worse for the transmission clutches for it to be too slow and soft. 1.5 second is the average time for a correct setting shown in the manual. Again there are a couple other adjustments they say to check before making the needle valve adjustment. The manual lays it all out.

Mikeforester
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Joined: Sun Sep 09, 2018 6:00 am
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Re: 450B shifting speed

Post by Mikeforester » Tue Sep 15, 2020 6:28 pm

Hi,

Jim's right with the shift time. It shouldn't be a violent shift (pop you out of the seat) , nor should it be lazy (waiting for seconds for the transmission to engage). When adjusted correctly (following the procedure set forth in the manual) it should shift smooth yet firm. There is a thread from years past on this site on how to do it correctly. You need the manual and a pressure gauge to adjust the H-L-R transmission correctly for your series machine.

Mike

timmtnman
440 crawler
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Joined: Sun May 15, 2016 3:44 pm
Location: Sylva NC

Re: 450B shifting speed

Post by timmtnman » Tue Sep 15, 2020 6:40 pm

Thanks for the help.

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DrLoch
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Re: 450B shifting speed

Post by DrLoch » Wed Sep 16, 2020 6:55 am

As others have suggested, you need to go through all the preliminary checks and adjustments prior to adjusting the needle valve that controls shifting speed. Optimum pressure for the HLR is about 180 PSI.
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timmtnman
440 crawler
440 crawler
Posts: 165
Joined: Sun May 15, 2016 3:44 pm
Location: Sylva NC

Re: 450B shifting speed

Post by timmtnman » Wed Sep 16, 2020 11:50 am

Okay, so am I supposed to loosen the linkage stop nut first before adjusting the free play in the pedal since I haven't had it apart.

Jim B
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Re: 450B shifting speed

Post by Jim B » Wed Sep 16, 2020 5:05 pm

Check, and adjust the clutch pedal free play before doing any thing to the valve stop nut. Once the free play is correct then do the valve stop nut adjustment.

timmtnman
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Re: 450B shifting speed

Post by timmtnman » Sun Sep 20, 2020 12:35 pm

I did the clutch adjustment today and what a big difference it made on the shifting speed. Really smooth now. It was way way off, I dont think it ever disengaged the clutch before. Biggest problem I had was understanding the free travel. After I figured that out everything else was simple. Thanks for the help.

timmtnman
440 crawler
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Posts: 165
Joined: Sun May 15, 2016 3:44 pm
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Re: 450B shifting speed

Post by timmtnman » Sun Sep 20, 2020 12:40 pm

This write up helped me understand the adjustment better than the book.
HLR adjustment nut should be somewhere midway from top to bottom of threads.. OK 1 last time..; first , adjust the clutch bolt to 3 and 3/4" "freeplay" from top of pedal to where you feel the fingers of the clutch contact the throw-out bearing..Back off the adjustmrnt inside the clutch housing rubber plug so the pressure drops off to about lets say 50 lbs. Turn the nut in and watch the pressure guage . It should go to it's maximum pressure then drop off slightly , without pulling the clutch pedal off it's stop.If it pulls the pedal off it's stop before it gets to it's maximum pressure , there's a problem in the HLR clutch operating shaft or roll pins..Once you have your max. pressure ,push in the clutch pedal about 1/2" the oil pressure should raise about 5-10 lbs..Now you're gonna have to fine tune that adjustment from there.The speed of shift shouldn't be so fast that you can't shift from reverse to forward at wide open throttle without using the clutch pedal..Optimum pressure for HLR is about 180 lbs operating pressure.

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