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Author Topic: D37e-2 bevel gear shaft  (Read 782 times)

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Offline Jkauffman

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D37e-2 bevel gear shaft
« on: October 12, 2021, 09:03:06 PM »
Ok so I’ve got a komatsu d37e-2 dozer that I’ve been redoing the steering clutches and brake bands on,and finally have all the parts and the time to reassemble.The first thing I noticed when starting to put it together is that the plate in the bevel gear shaft has a lot of slop in it. ::)(in other words the bevel gear shaft bearings are bad).Has anyone changed these?I have a manual but it has old black and white picks and is kinda a pain.I still have clutches out so I might as well fix it now.I don’t know much about dozers Lol as this is my first one maybe I should just get someone to fix it.Thanks for any advice

I should say I have a fair amount of mechanical experience and ain’t scared to tear into something(not enough anyways)and think I could fix it but just don’t know much about setting the bearing preload and gear wear patterns

Online mike_belben

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Re: D37e-2 bevel gear shaft
« Reply #1 on: October 12, 2021, 10:31:49 PM »
id like to help but i dont have the experience with them.  Try youtube?
Isaiah 63:10

Offline Jkauffman

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Re: D37e-2 bevel gear shaft
« Reply #2 on: October 13, 2021, 06:30:57 PM »
I know this is a vain hope but if the clutches where in it couldnt move near so much but Im sure it aint normal.
Some how I have to make a puller that can pull up to 12 ton to pull the plate off the end because theyre pressed on.Dont know why they have to make it that hard 

Offline Gary_C

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Re: D37e-2 bevel gear shaft
« Reply #3 on: October 13, 2021, 06:46:07 PM »
Got any pictures or parts diagrams?
Never take life seriously. Nobody gets out alive anyway.

Offline Jkauffman

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Re: D37e-2 bevel gear shaft
« Reply #4 on: October 13, 2021, 07:26:36 PM »
 

 The one picture is of the clutch housing you can see the plate on the left that will need to come off,than the other picture is of course the bevel gear itself and the other clutch is just outside to the left.Dont really have any parts diagrams 

Online mike_belben

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Re: D37e-2 bevel gear shaft
« Reply #5 on: October 13, 2021, 10:57:25 PM »
I dont think we got all the pics you intended for
Isaiah 63:10

Offline Gary_C

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Re: D37e-2 bevel gear shaft
« Reply #6 on: October 14, 2021, 12:33:09 AM »

Here is the other picture in OP's gallery. Doesn't help me much. 

Never take life seriously. Nobody gets out alive anyway.

Offline Jkauffman

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Re: D37e-2 bevel gear shaft
« Reply #7 on: January 01, 2022, 10:00:10 PM »
Same dozer different question ::).I finally took it for a drive for the first time today.As I was turning on gravel,it sounded like the sprocket slipped in the right track and i was just wondering on how to set track tension as my manual doesnt tell me.The sprockets I havent measured but they are far from worn out.Also I know absolutely nothing about running a dozer so is it normal for it to bog slightly as you apply brake for turning?I have them set to exactly komatsu specs but as I push full pedal it will bog slightly as its turning.Sorry for the ramble but any advice is appreciated 

Offline Jkauffman

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Re: D37e-2 bevel gear shaft
« Reply #8 on: January 01, 2022, 10:07:37 PM »
And I shoulda said I know the clutches are at least releasing some because if I just push the pedal in a little bit it will turn but to when I push it farther in to engage the brake it will bog down

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Re: D37e-2 bevel gear shaft
« Reply #9 on: January 01, 2022, 10:20:23 PM »
the drive power to the track you are braking is not fully uncoupled.  The komatsus i am familiar with (D31P-18 in my case.. 1990ish wet clutch) apply pressure to clamp the drive clutches and transmit power all the time unless you push the pedal and bleed the pressure back to tank.  The friction coupling (clutch) will then slip.  

If on the very back top rear of the machine under the batteries has a valve block with two spools facing forward and cam follower linkages and rollers to push the spools then yours is the same.  They get flat spots on the roller and the pins thru the roller wear in half so you can never have correct adjustment.  Basically your brake should not begin to come on until your clutch is all the way bled down in pressure.  If the brake comes on while still coupled the engine sees a load and chugs down to pull it.  It is driving thru the brakes.  

Stomp your steer pedal to the floor a few times.. I mean stab the heck out of it, mash as hard and fast as you can.. See if it will feel right even just once.  I had to redrill all my little linkages under the seat and put SAE bolts to replsce the shot pins.  With a half worn pin one side is normal and the other is worn flat.  The pin revolves in the yoke and sometimes youre too loose, sometimes too tight but you can never have it work right with that shot pin collection.  


Physically remove every pin from foot pedal to hydraulic spool and look because you cant feel a bad one most of the time.  Grease it up good for reassembly since there are no zerks.

Dont run it like that or your brakes will get ate up
Isaiah 63:10

Offline Jkauffman

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Re: D37e-2 bevel gear shaft
« Reply #10 on: January 01, 2022, 10:59:11 PM »
I actually have gone over my linkages already,they where terrible.Some pins were wore half the way thru.Both clutches are rebuilt and both brake bands relined 

Online mike_belben

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Re: D37e-2 bevel gear shaft
« Reply #11 on: January 01, 2022, 11:38:47 PM »
Okay good then just back off your brake adjustments so you can fully clutch before the brake starts engaging. The brakes are coming in too soon and need slack is what it sounds like to me.  You can back them way off until theyre gone to verify that the lugging clears up. You can drive it with the adjustment covers off. 
Isaiah 63:10

Offline Jkauffman

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Re: D37e-2 bevel gear shaft
« Reply #12 on: January 02, 2022, 08:33:51 AM »
Thanks Ill try that.Its amazing how bad the linkages where when I got it.The brake shaft that went through the top of the clutch housing had a bad bearing and lots of play with deep grooves worn in the shaft.I had that welded and turned with new bearings on both sides and new pins and bolts everywhere,and I also drilled out and installed bushings in some of the shifter linkages.This should be a good machine now :-\it has a rebuilt motor,rebuilt steering clutches,relined brake bands,new bearings on the bevel gear shaft and new fluids all the way through.Im also putting a winch on it

Online mike_belben

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Re: D37e-2 bevel gear shaft
« Reply #13 on: January 02, 2022, 08:41:40 AM »
I think highly of my d31 and dont think i will part with it.  Ive not had an easier starting diesel. It can sit 6 months and fire like its still warm. 


I take that back.  My 350 small cam can sit for 6 years and fire on the first revolution. Another one thats as basic as me. 
Isaiah 63:10

Offline barbender

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Re: D37e-2 bevel gear shaft
« Reply #14 on: January 02, 2022, 01:00:01 PM »
BAB- Basic as Belben👍🏻😁
Too many irons in the fire

Offline Jkauffman

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Re: D37e-2 bevel gear shaft
« Reply #15 on: January 03, 2022, 10:59:14 PM »
Has anyone ever heard of oil levels in the transmission and steering clutch cases fluctuating?I can easy see it happening in the bevel gear case but steering clutch case??It maybe could come in the steering booster cylinders but how would it get out?Beats me Im sick of this dozer and wanna push it over the hill now :o.I know all machines break but man I wish itd give me a break

Offline Jkauffman

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Re: D37e-2 bevel gear shaft
« Reply #16 on: January 03, 2022, 11:26:09 PM »
Hey I actually think I found my problem!(suprisesuprise)I found on another forum of a fellow with a bigger komatsu that was doing the same thing.It turned out to be the input shaft seal on the transmission pump.And mine is most definitely bad its leakin oil everywhere.Maybe there is hope 8)
Im still just a kid workin on very limited finances so every new problem is discouraging but if this is the problem it wont be to bad

Online mike_belben

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Re: D37e-2 bevel gear shaft
« Reply #17 on: January 04, 2022, 12:24:50 AM »
Keep it up and youll be a wise old man eventually. 


I hear ya on gettin discouraged.  I bite off more than i can chew all the time and something seems to break daily. Havent had $ in years. 
Isaiah 63:10

Offline stavebuyer

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Re: D37e-2 bevel gear shaft
« Reply #18 on: January 04, 2022, 03:02:19 AM »
Has anyone ever heard of oil levels in the transmission and steering clutch cases fluctuating?I can easy see it happening in the bevel gear case but steering clutch case??It maybe could come in the steering booster cylinders but how would it get out?Beats me Im sick of this dozer and wanna push it over the hill now :o.I know all machines break but man I wish itd give me a break
I have no explanation as to why, but it seems to affect dozers more than any other type of machine. They do so much when they are working that they entrap you. I will chalk up my first episode to inexperience. The second to bad luck. The third to being hard-headed and the fourth I can't excuse but hopefully was enough to break me of the habit.  :D

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Re: D37e-2 bevel gear shaft
« Reply #19 on: January 04, 2022, 09:12:09 AM »
It is so valuable to me i try not to use it.. Or at least minimize its tasks to those only the dozer can do.  

I mentioned trading it for another machine the other day and even my wife, who hated it for the longest time, said dont you dare. 

You know its a good machine when the spouse says it stays. 
Isaiah 63:10


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