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Mtd 990? Need Another Set Of Eyes, Please.


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#91 Lost Pup OFFLINE  

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Posted October 19, 2014 - 10:16 PM

One from a older Bolens manual.
240 in lbs which is about 20 ft lbs.

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#92 Moosetales OFFLINE  

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Posted October 24, 2014 - 08:48 PM

The whole purpose of pulling the yoke off the hydro pump was to replace the fan. The fan that came off the tractor was made of metal. The only replacements I can find are plastic. Is it possible to even find metal replacement fans? Is there an advantage to going with the plastic replacement fans? I appreciate your feedback. Thanks.

 

Matthew



#93 Lost Pup OFFLINE  

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Posted October 25, 2014 - 03:43 AM

In my review of the older manuals with pics , I have never found a metal fan only plastic.
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#94 VTXrider OFFLINE  

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Posted October 25, 2014 - 03:50 AM

Never came across a metal fan. The plastic units are about $25 and the spring retaining ring is what holds it onto the yoke.


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#95 Moosetales OFFLINE  

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Posted October 25, 2014 - 06:08 AM

Now I'm intrigued as to what brand my metal fan came off of. The metal fan was held on by a small bolt which acted like a set screw. I've seen several fans with seemingly different set ups. Any chance you have a pic of what you are referring to when you say "retaining ring"? Thanks.

#96 Lost Pup OFFLINE  

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Posted October 25, 2014 - 07:03 AM

I have seen both styles.
Pics from the manuals below.

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#97 Lost Pup OFFLINE  

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Posted October 25, 2014 - 07:08 AM

The fan is fastened / held by compression by use of the retaining clip.
#105 in the third pic. I will search my actual pics to see if I have a clear one.
Of course it's not as secure as the bolt thru.
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#98 Lost Pup OFFLINE  

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Posted October 25, 2014 - 07:31 AM

Actual MTD 990 Pic

Needed a custom puller to remove the driveshaft yoke.

The other side of the fan is sectioned/divided so with the clip on it

compresses/holds it to the yoke to rotate.

 

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#99 Moosetales OFFLINE  

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Posted October 25, 2014 - 03:28 PM

Before I break something I thought I'd ask how you guys have gotten the bottom bracket bolt for the generator off without busting something?

Thanks.

#100 Sawdust ONLINE  

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Posted October 25, 2014 - 06:43 PM

Here's a pick of my plastic fan before I took it off. I don't remember having any problems with the S/G bracket. I do remember taking the S/G off first then the bracket. 

 

ref23.jpg

 

Here is the only pic I have of the S/G.

 

ref1.jpg


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#101 Moosetales OFFLINE  

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Posted October 25, 2014 - 07:34 PM

Here's the bolt I was referring too.

(Sorry the pic is turned. I am posting from my phone and nothing seems to be working as expected. Ugh.)

(after)

20141025_201414.jpg

(before)

20141025_161937.jpg

I solved the problem by removing all four motor mounts and sliding the motor far enough to where I could get a wrench on it.

With the removal of the engine mount bolts and a few more parts I am definitely going to need your help putting the 990 back together. I am doing well not to freak out about where all the parts will go.

Edited by Moosetales, October 25, 2014 - 07:38 PM.


#102 Sawdust ONLINE  

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Posted October 25, 2014 - 10:26 PM

Glad you got that off without any damage. My pics in sequence as I took things apart has helped me a great deal. Don't take too much apart without taking pics. Even though I bagged all the hardware & marked them I forgot some of my own terminology. The next time I'll mark things according to the manual.
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#103 VTXrider OFFLINE  

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Posted October 26, 2014 - 03:04 AM

It comes apart fast but going back together takes longer than my short memory. I know you don't have the option I did but having an assembled 990 to go look at, is how I remembered. If you need help, I can take pictures any time to post for you. I have quite a few pictures to refer back as does Lost Pup and Sawdust. Lost Pup's detailed rebuild has helped me in the past. 

 

I have been cleaning a lot of rusty tools and parts lately. I use white vinegar to soak them in for 24 hours. Rinsing and wipe the black coating off. Wire brush or use a green scrubbing pad if needed then coat with oil. Works good with bolts and nuts. All these tools were rusty and they turned out nice.

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Edited by VTXrider, October 26, 2014 - 03:12 AM.

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#104 Moosetales OFFLINE  

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Posted October 26, 2014 - 06:44 AM

It comes apart fast but going back together takes longer than my short memory. I know you don't have the option I did but having an assembled 990 to go look at, is how I remembered. If you need help, I can take pictures any time to post for you. I have quite a few pictures to refer back as does Lost Pup and Sawdust. Lost Pup's detailed rebuild has helped me in the past. 
 
I have been cleaning a lot of rusty tools and parts lately. I use white vinegar to soak them in for 24 hours. Rinsing and wipe the black coating off. Wire brush or use a green scrubbing pad if needed then coat with oil. Works good with bolts and nuts. All these tools were rusty and they turned out nice.


Looking great. Almost a black oxide appearance. I really like that gun metal Grey appearance.
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#105 Canawler OFFLINE  

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Posted October 26, 2014 - 06:08 PM

 I am doing well not to freak out about where all the parts will go.

 

Don't worry.  Rule of thumb is you can leave off / forget 5% of the parts before you will have any trouble. :thumbs:


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