MURRAY 30/12HP (31621x66B DoM 3143)

Mike_Torello

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Hi, new here... just recently we purchased used Murray lawnmower which had Husqvarna badges on the side panels :S (originaly bought in Germany I think)

model No# is 31621x66B
date of manufacture: 3143 (so it should be 1993 right?)

long story short, mandrel housing (055962) was a toast, so it needs replacement... mandrel (091922MA) looks like it's altered something else and pulley (091951) rotten out...

So I wanted to order new parts, but have trouble finding manual for it...

on Murray web page I found closest manual for 31621x70G which lawnmower looks same on pictures as ours but it's 1996 and our mower should be 1993 by DoM... but I guessed because it's the identical on the pictures it should be it...

So i ordered parts by catalog No# in that manual... now it came by mail... housing is probably the same (not much left of the old one), but new ordered bearings are smaller in inner diameter, mandrel is thinner and 30mm shorter owerall... but I don't know are those I got with mower original 1993 or it broke down and someone made and fitted alternative...

So, how to be 100% shore that bought parts for 1996 year fit in 1993? Because if they don't fit I need to send them back for refund...

Thank you for understanding and quick answers
 

Fish

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Not sure about the Marrays sold outside of the US.
Take some pics and put up here, as well as measurements of your old stuff, and go to an aftermarket catalog like this one to find the parts you need.

murray 001.jpgmurray 002.jpg
 

bertsmobile1

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Considering that the mower is so old you might be better asking your question on the Murray Owners World group.
This is a good group of Murray fanatics
Murray made mowers for Husqvarna before Husqvarna bought AYP where their mowers are now made.
Murray also made mowers for Stihl & John Deere.
http://www.angelfire.com/music2/ULHONLINE/MOW.html
Last time I was there , they had parts books back to the 80's
 

Mike_Torello

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Not sure about the Marrays sold outside of the US.
Take some pics and put up here, as well as measurements of your old stuff, and go to an aftermarket catalog like this one to find the parts you need.
View attachment 45788View attachment 45789

on these pics you can see old mandrel looks nothing like new one but there is difference in length so I'm guessing that is something improvised by first owner... I don't have pics of full assembled mower, but it looks identical to one in the schematic picture... Parts I have with me now are new mandrel and mandrel housing with bearings... all other including mower are 120km away at my parents house.

New mandrel is 161mm long and 15,8mm thick where it goes in bearings... mandrel housing is 70mm tall...
 

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Mike_Torello

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Considering that the mower is so old you might be better asking your question on the Murray Owners World group.
This is a good group of Murray fanatics
Murray made mowers for Husqvarna before Husqvarna bought AYP where their mowers are now made.
Murray also made mowers for Stihl & John Deere.
http://www.angelfire.com/music2/ULHONLINE/MOW.html
Last time I was there , they had parts books back to the 80's

Thank you for help, will look in to it :D
 

Fish

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Here is what it likely looked like before all of the damage, we just need the length. You will need that spacer too.

arbre-de-palier-pour-murray-n-20616.jpg
 

Fish

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Any remains of the old pulley?
 

Mike_Torello

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Here is what it likely looked like before all of the damage, we just need the length. You will need that spacer too.
View attachment 45803

it was 190mm in total I guess +/-... endcap can't be pulled, looks like it was welded, spacer might be pulled if soaked in diesel or some release agent... but I don't believe it was that one... because this one has more coarser threading, splinter is actually material welded on it then filed, IDK about threading in the middle?!?!?!

pulley was cut in half because rotten at connection with shaft, it was 190,5 x 14.3mm (9/16" x 7 1/2")... I don't have it near to take pics :s
 

Fish

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I would say that the coarse spiral was from rotational metal/metal contact. The top piece is just the center of the pulley, It is a snug fit + a woodruff key. If you have the outer part of the pulley, we will need to measure the 0.d. of that as well.
 
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