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Working on an older 60" mower. I'm guessing its a model 31229. The center spindle was complete toast. I was able after a couple months to find replacement parts that did not drain my bank account. How are the bearings set or pre-loaded? The OM states the blades have a torque. I can think the outer spindles could be adjusted by the top nut. But what about the center spindle with the thin head bolt? I see no shims in the IPL, I can't imagine the bolt is just tightened and the pre-load is correct. Also the lift assist springs are missing. I'm guessing they are different than the ones used with the 50" deck or lift assist by the different part# Is there a way to ID the springs? Length, # of coils ect.
 

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Discussion Starter #3
No mine is older that that. It does look like the center spindle is the same. Mine has side plates that adjust the cutting height add the four wheels are mounted on L shape shafts that also adjust the cutting height. I should get the drive pulley soon then be able to figure it out. Thanks
 

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Here is the IPL for your deck:

https://www.gravelymanuals.com/pdf/60_Inch_Rotary_Mower_Op_Man_0579.pdf

Contrary to your thinking, there is no "adjustment" from the factory on those bearings, they get tightened all the way down. Otherwise they will come loose.

If, you assemble them and they are too tight, you need new shafts or shims between the bearing and the shaft to increase the distance between the two bearings.

The factory never provided shims because they never used them.

Places like McMaster Carr will have shims that will work.

They should turn free but have no noticeable play.

GRAVELY still sells the correct lift assist spring:

https://www.jackssmallengines.com/jacks-parts-lookup/part/gravely/08330800

Sheldon
 
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