Mandrel Assembly 587820301

Took the deck off of the mower,removed the blade assembly, removed the mandrel cover, Removed the nut above the mandrel pulley, and removed the pulley. Removed the four bolts holding the mandrel to the deck. Removed the broken mandrel assembly. Placed the new mandrel in place, used the four self tapping bolts to attach the new mandrel. Placed the washer and the new mandrel pulley and secured them with the nut. Replaced the mandrel cover. Attached the blade assembly. Then installed the deck back on the mower. Make sure you take a picture of make a note how the belt was routed.

The parts I ordered were not overly expensive, arrived at my house quickly and were correct. The repair project was easier than I expected due to the good service from the parts vendor.

Remove the drive belt and drop and remove the mower deck per owner's manual.
Use the 2x4 to wedge the affected blade and use the socket wrench to remove the blade.
Remove the four bolts holding the mandrel assembly to the mower deck.
Discard the broken mandrel assembly.
Install the replacement mandrel assembly using the four bolts.
Using the 2x4, replace the blade.
Install the mower deck onto the lawn tractor. Reinstall the drive belt. Done.
Do NOT try to repair the mandrel assembly. Components are pressed in. Buy the whole assembly. It's worth it. Especially at the price eReplacementParts charges. No one is cheaper.
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1. Removed the mower deck.
2. Unbolted the broken mandrel.
3. Removed the pulley.
4. Cleaned the part, found the part number.
5. Ordered the part from ereplacementpart.com
6. Waited 2 days.
7. Received the correct part and installed.
Completely satisfied. Thank you!

1. Removed mandrel cover.
2. Removed large nut on top to remove pulley.
3. Removed 4 bolts holding mandrel and dropped mandrel and blade through deck.
4.Install blade on new mandrel. New mandrel is not threaded where mounting bolts go. Best thing is to thread mounting holes with existing bolts before mounting mandrel to the deck, easier than trying to thread them while holding it in place.
5. Install mandrel. Put pulley back on top, install large nut, make sure to hold blade from the bottom to get a good seat on large nut. Put belt back on.
6. Put cover on, put everything back in place.
7. Started mower. Everything works great!

Removed deck and removed blade, then the mandrel pulley and spindle, replaced with new parts and back in service. The new mandrel is not threaded for the bolts connecting it to the deck, but the bolts are self tapping.

received new mandrel and after trying to install the four screws/bolts that were shipped with it and having no success, I used a magnifying glass to check the holes in the mandrel. NO Threads!
I had to tap four holes with a 5/16 NC tap which took a while. Then everything worked perfectly.

1. Removed mower deck.
2. Removed broken mandrel and mower blades.
3. Installed new mandrel and blades.
4. Mounted mower deck on the tractor and re-installed the drive belt on the mower.

Removed deck from the tractor. Raised the deck up by rope to garage door rail to expose both the top and bottom side. Two of the three mandrels had a grinding noise.
Clamped the blade tip with vice grips to prevent spinning.
Removed top nut and pulley. Removed bottom nut and blade. Removed two of three mandrels. Threaded the mounting holes in the new mandrels. (That's how to tell they are new) Mounted the two new mandrels. Sharpened all three blades.
Place blade in position and tighten the bolt. Clamp vice grip to blade end to prevent spinning.
Mount pulley and tighten top and bottom bolt and nut. Lower the deck and remount it to the tractor.
Grinding noise GONE!

Removed mower deck from tractor
Took off drive belt
unbolted cutting blade
unbolted pulley
bolted in new mandrel
reassembled mower deck
reinstalled mower deck on tractor

1 removed mower deck
2. Removed belt
3. Unbolted old mandrel
4. Installed and bolted in new mandrel.pulley assy.
5. Reinstalled belt
6. reinstalled mower deck