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Mtd 990? Need Another Set Of Eyes, Please.


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#46 Sawdust OFFLINE  

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Posted October 08, 2014 - 10:05 PM

Awesome makes me drool. I think the grilles on these are the best. Did your headlight plate have a decal in the middle. I never had one but I bought one off of ebay. It has a white MTD in the middle. I think my Turf Trac was just black like your's. I'M debating wether to re do it or paint it black. I like your starter pulley yellow.
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#47 Texas Deere and Horse OFFLINE  

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Posted October 08, 2014 - 10:07 PM

I think it looks great. Can't wait to see it finished.
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#48 KennyP ONLINE  

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Posted October 09, 2014 - 04:26 AM

Looks good!


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#49 dave8338 OFFLINE  

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Posted October 10, 2014 - 09:39 AM

Fantastic work on the machine.  Love the color combo.  The Bumble Bee, indeed !   :thumbs:


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#50 Moosetales OFFLINE  

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Posted October 10, 2014 - 06:22 PM

Ugh. I've been hard at the task of replacing the fan for the transmission and I have been as of yet unsuccessful at getting the yoke free. I've tried heat and PB Blaster and then heat again. I fear I may break something if I keep attempting to break it free.

20140917_222413.jpg

Any ideas before I move to using a bigger hammer (J/K). Thanks.

Edited by Moosetales, October 10, 2014 - 07:20 PM.


#51 Moosetales OFFLINE  

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Posted October 10, 2014 - 07:21 PM

Awesome makes me drool. I think the grilles on these are the best. Did your headlight plate have a decal in the middle. I never had one but I bought one off of ebay. It has a white MTD in the middle. I think my Turf Trac was just black like your's. I'M debating wether to re do it or paint it black. I like your starter pulley yellow.


There was no trace of a decal. I like the decal and may pick one up at some point.
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#52 Sawdust OFFLINE  

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Posted October 10, 2014 - 08:27 PM

Ugh. I've been hard at the task of replacing the fan for the transmission and I have been as of yet unsuccessful at getting the yoke free. I've tried heat and PB Blaster and then heat again. I fear I may break something if I keep attempting to break it free.

attachicon.gif20140917_222413.jpg

Any ideas before I move to using a bigger hammer (J/K). Thanks.

 

 

Here is the link on my rebuild. I soaked, heated & tapped for days before I got mine off. When I used the ball joint fork with a few light taps between the yoke & housing it popped right off. Hope this helps. Page #105

http://gardentractor...-mtd-990/page-7

 

Edited by Sawdust, October 11, 2014 - 12:09 AM.

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#53 VTXrider ONLINE  

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Posted October 11, 2014 - 06:02 AM

From behind the transmission, I drove it off with a pry bar. Place the end of the bar into the yoke or between the pump and the yoke if there is space. A heavy hammer with light taps to start with. It took a fairly heavy hit before mine started to move. Rotate the fan and use the broken blade space to get a good place in the yoke to put the pry bar end.

 

The ball joint fork is a very good idea and maybe a couple more heating cycles will break the rust more.


Edited by VTXrider, October 11, 2014 - 06:42 AM.

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#54 Moosetales OFFLINE  

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Posted October 15, 2014 - 05:54 AM

SUCCESS, at a price I fear.

20141015_064457.jpg

Here's my crude ball joint remover tool II crafted to do the job and it worked great.

20141014_202219.jpg

To my untrained ear I believe all my banging has jarred a ball bearing (or something) lose in the hydraulic pump. What do you think?

Here's a short video clip where you can hear the sound I'm referencing.

YouTube
Rattle in the MTD 990 Transmission:

Here's to hoping it's a relatively quick fix.

Edited by Moosetales, October 15, 2014 - 07:34 AM.

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#55 VTXrider ONLINE  

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Posted October 15, 2014 - 09:12 AM

There are not many parts in the pump. Remove the pump and take a look. There are rollers that sit in the spider. May have broken a spider leg. This picture is from the manual of a 1980 990.

 

Good work on the fork tool  :thumbs:

Attached Thumbnails

  • pump.jpg

Edited by VTXrider, October 15, 2014 - 09:18 AM.

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#56 Sawdust OFFLINE  

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Posted October 15, 2014 - 01:05 PM

That doesn't sound good but like VTXrider mentioned I would take it apart to inspect. Good job improvising on the fork tool. Hope it goes well for you. I just went out & checked mine & it doesn't do what yours is doing....you had me worried :D


Edited by Sawdust, October 15, 2014 - 01:17 PM.

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#57 Moosetales OFFLINE  

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Posted October 15, 2014 - 02:11 PM

Thanks guys. I can't tell in the diagram whether or not there is a seal or gasket between the sections of the pump housing? Thanks.

 

Matthew



#58 Lost Pup OFFLINE  

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Posted October 15, 2014 - 02:28 PM

If the pump is dry you will hear the carrier pins as you spin the shaft.

 

MTD122.jpg


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#59 Lost Pup OFFLINE  

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Posted October 15, 2014 - 02:30 PM

Thanks guys. I can't tell in the diagram whether or not there is a seal or gasket between the sections of the pump housing? Thanks.

 

Matthew

No gasket that I remember.


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#60 Moosetales OFFLINE  

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Posted October 15, 2014 - 10:08 PM

Well, it appears I need to go deeper. All looks to be intact



20141015_212210.jpg

I'll start digging into the rest of the hydraulic pump tomorrow to see what's making the racket. I'd welcome any feedback or precautions for this next layer of investigation if anyone's inclined. Thanks.

Matthew




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