Jump to content

Nominations for Tractor of the Month
Garden Tractors and Parts on eBay



Photo
- - - - -

Engine Pulley Install


  • Please log in to reply
14 replies to this topic

#1 BrokenTractor OFFLINE  

BrokenTractor
  • Member
  • Member No: 69513
  • 8 Thanks
  • 30 posts
  • Location: CT

Posted October 11, 2016 - 03:09 PM

Hello,

 

I am installing the engine pulley for my MTD tractor.

 

It is http://www.mtdparts....parts/756-0982b

 

The thing I don't get is there a large washer or ring that goes below the engine pulley and prevents the 7/16 x 20 1.5" hex bolt

from slipping? What I mean is even if I put the hex bolt in place you can pull the engine straight down towards the ground no?

 

I am enclosing a picture from the parts list below.eng-pulley.png

 

It seems to me the should be a large ring say 7/16" I.D. by say 2" O.D. that the hex bolt passes thru.

 

The PDF is 710-1011c.pdf and on page 24.

 

So if you are assembling this unit you would do the following I think:

1. 750-0956  goes first

2. Get the keyway to match and then the engine pulley goes next.

3. A small 7/16" lock washer 

4. Then the thing that is missing???

5. Then the hex bolt 7/16" x 20 x 1.5"

 

Thanks,

BrokenTractor

 



#2 boyscout862 ONLINE  

boyscout862
  • Senior Member
  • Member No: 8923
  • 9,743 Thanks
  • 7,516 posts
  • Location: N.E. Connecticut

Posted October 11, 2016 - 03:17 PM

Post some pics.

#3 BrokenTractor OFFLINE  

BrokenTractor
  • Member
  • Member No: 69513
  • 8 Thanks
  • 30 posts
  • Location: CT

Posted October 11, 2016 - 03:27 PM

Hi BoyScout862,

 

I only have the pic of the engine pulley right now. But I can't figure out how to include it in this message.



#4 BrokenTractor OFFLINE  

BrokenTractor
  • Member
  • Member No: 69513
  • 8 Thanks
  • 30 posts
  • Location: CT

Posted October 11, 2016 - 03:30 PM

1011161535a

 

 

I think this should be an image of the engine pulley where the top view is actually the part closest to the ground.



#5 BrokenTractor OFFLINE  

BrokenTractor
  • Member
  • Member No: 69513
  • 8 Thanks
  • 30 posts
  • Location: CT

Posted October 11, 2016 - 03:32 PM

So notice how big that center holes is? Do I need a large ring on top of that before I put the hex bolt ( 7/16" 20 x 1.5" ) in place.



#6 BrokenTractor OFFLINE  

BrokenTractor
  • Member
  • Member No: 69513
  • 8 Thanks
  • 30 posts
  • Location: CT

Posted October 11, 2016 - 03:40 PM

Maybe I should ask it this way as well. 

 

Is the 7/16" 20 x 1.5" being threaded onto the engine drive shaft. Does that cause the expansion needed so the engine pulley does not fall to the ground?

 

I ask this since maybe no large bottom washer is needed at all. I don't know because somehow the hex bolt fell out during usage. I did not take it apart so I really do not what was there.



#7 KennyP ONLINE  

KennyP

    FORDoholic

  • Super Moderator
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 2253
  • 28,355 Thanks
  • 39,630 posts
  • Location: Collinsville, Oklahoma

Posted October 11, 2016 - 03:56 PM

I'm thinking #38 above is a very large washer that holds it all up there!


  • boyscout862 said thank you

#8 WNYTractorTinkerer ONLINE  

WNYTractorTinkerer

    Tinker Master

  • Senior Member
  • -GTt Supporter-
  • Member No: 10789
  • 8,295 Thanks
  • 4,656 posts
  • Location: Avon, NY

Posted October 11, 2016 - 04:09 PM

I'm thinking #38 above is a very large washer that holds it all up there!

I agree.  Sometimes pulleys like to stick onto the PTO end of the Crank..  PB blaster and heat..  Be careful not to pry against the the engine case..  Case iron don't hold up to pressure that well..  Keep a cup of water handy and beware the crank seal (don't melt it unless it's getting replaced.   **I would replace it since you are in there anyway)  JMO

 

Good Luck pilgrim!


Edited by WNYTractorTinkerer, October 11, 2016 - 04:10 PM.

  • boyscout862 said thank you

#9 glgrumpy ONLINE  

glgrumpy

    Getting Out!

  • Senior Member
  • -GTt Supporter-
  • Member No: 8360
  • 6,647 Thanks
  • 6,460 posts
  • Location: Huntington, IN 46750 North East in State

Posted October 11, 2016 - 04:16 PM

The bolt does NOT expand any metal to hold, just pushes on the BIG washer which you don't have and pushes the whole pulley up tight to the crank spacer or machined edge to make it tight. The KEY in shaft and pulley is what keeps it spinning when turning. Get a Big washer!  Any good hardware should have something. Try not to get too thin, yet not thick enough so bolt is short of going into threads of crank good.


  • boyscout862, BrokenTractor and Tecumseh power have said thanks

#10 BrokenTractor OFFLINE  

BrokenTractor
  • Member
  • Member No: 69513
  • 8 Thanks
  • 30 posts
  • Location: CT

Posted October 11, 2016 - 04:20 PM

Ok here is the problem and using the PDF part list as reference.

 

On page 24 the diagram is shown

On page 25 there is no #38 listed.

 

But assuming #38 is somewhere above or below the diagram here are my choices:

1. cotter pin

2. hex nut

3. hex bolt

 

This is where my confusion comes in and i can't figure out what #38 should be.

 

But I did find this:

 

** Ref. No. 32
736-0495 Thrust Wash. 5/8" I.D. x 1" O.D. x .025" Thk.
736-0336 Fl-Wash. 5/8" I.D. x 1" O.D. x .030" Thk.
736-0494 Thrust Wash. 5/8" I.D. x 1" O.D. x .035" Thk.
736-0337 Fl-Wash. 5/8" I.D. x 1" O.D. x .040" Thk.
**Ref. No. 37
736-0349 Fl-Wash. 5/8" I.D. x 1" O.D. x .020" Thk.
736-0336 Fl-Wash. 5/8" I.D. x 1" O.D. x .030" Thk.
736-0337 Fl-Wash. 5/8" I.D. x 1" O.D. x .040" Thk.
**Ref. No. 60
736-0492 Fl-Wash. .76" I.D. x 1.5" O.D. x .010" Thk.
736-0493 Fl-Wash. .76" I.D. x 1.5" O.D. x .020" Thk.
736-0351 Fl-Wash. .76" I.D. x 1.5" O.D. x .030" Thk.
736-0445 Fl-Wash. .76" I.D. x 1.5" O.D. x .060" Thk.

  • WNYTractorTinkerer said thank you

#11 BrokenTractor OFFLINE  

BrokenTractor
  • Member
  • Member No: 69513
  • 8 Thanks
  • 30 posts
  • Location: CT

Posted October 11, 2016 - 04:21 PM

The bolt does NOT expand any metal to hold, just pushes on the BIG washer which you don't have and pushes the whole pulley up tight to the crank spacer or machined edge to make it tight. The KEY in shaft and pulley is what keeps it spinning when turning. Get a Big washer!  Any good hardware should have something. Try not to get too thin, yet not thick enough so bolt is short of going into threads of crank good.

Maybe this is the answer will let you know if #38 can be identified from the parts list.


  • boyscout862 said thank you

#12 KennyP ONLINE  

KennyP

    FORDoholic

  • Super Moderator
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 2253
  • 28,355 Thanks
  • 39,630 posts
  • Location: Collinsville, Oklahoma

Posted October 11, 2016 - 04:42 PM

I finally looked at your original post and yes, you need a big thicker washer to hold that on. I have multiple MTD built LT's around here and they all had a big washer the sucked the pulleys up onto the shaft!


  • boyscout862 said thank you

#13 BrokenTractor OFFLINE  

BrokenTractor
  • Member
  • Member No: 69513
  • 8 Thanks
  • 30 posts
  • Location: CT

Posted October 11, 2016 - 04:50 PM

KennyP Thanks for the reply and the answer! I just wanted to make sure there was nothing special about it or if it was even needed. You folks made that clear it is needed.

 

So a thick washer ( not to thick cuz bolt is 1.5" long ) that has an inside dimension of 7/16" and at least 1.25" outside diameter ( more like 1.5" ) to cover the "hole" in the drive shaft pulley. That hole is about 1" across.

 

Thanks to all as well.

 

BrokenTractor



#14 MiCarl ONLINE  

MiCarl
  • Senior Member
  • Member No: 75926
  • 825 Thanks
  • 472 posts
  • Location: Livonia, MI

Posted October 11, 2016 - 04:57 PM

The washer will be fairly thick, about 1/8 or 3/16".  Should be easy to come by, they're used on almost every engine with a pulley.



#15 WNYTractorTinkerer ONLINE  

WNYTractorTinkerer

    Tinker Master

  • Senior Member
  • -GTt Supporter-
  • Member No: 10789
  • 8,295 Thanks
  • 4,656 posts
  • Location: Avon, NY

Posted October 12, 2016 - 11:57 AM

I finally looked at your original post and yes, you need a big thicker washer to hold that on. I have multiple MTD built LT's around here and they all had a big washer the sucked the pulleys up onto the shaft!

So... you need a HO-washer?!?!   :watching_you:  :tapping_fingers:


  • KennyP said thank you




Top