BX 1850 Mid Mount Mower blade pulley bolts

   / BX 1850 Mid Mount Mower blade pulley bolts #1  

montelatici

Platinum Member
Joined
Apr 5, 2007
Messages
630
Location
Croom, Maryland
Tractor
Kubota B2601 and L3560 HSTC LE
If you start hearing rattling from your MMM, remove the blade pulley covers. The 4 bolts that hold the pulley together come loose, perhaps they did not torque them down correctly at the factory. I heard the rattling and smelled burnt rubber . Stopped the mower and removed the pulley cover on the left side and sure enough, only one bolt was still attached and it was loose.

It is not a tragedy, luckily. While it looks impossible, you can actually insert new bolts up from the bottom of the pulley without removing the pulley. Repair process:

1. Lower MMM to bottom with height set to zero.
2. Remove plastic pulley cover. (two knobs)
3. Unhook tension spring on port (left) side of mower deck. I used a 2 foot crow bar and a 3 foot piece of 2x4 set against the wheel and the drive pulley for levearge.
4. The belt comes off easily.
5. Align the pulley holders 4 holes with the holes in the pulley.
6. Take a new M8 (1.25 thread) bolt (same length as the original) and carefully try to insert it in one of the four holes underneath the pulley. I have big hands and fingers and I could do it, though it seems hopeless at first. Put a lock washer on the bolt and loosely screw an M8 nut on the end.
7. Do this for all four holes.
8. Block the blade with a piece of wood.
9. Carefully use an open end wrench to hold the head of the bolt from underneath the pulley. It is difficult but an open end wrench works. A crow's foot might be easier but i don't have crow's foot wrenches.
10. Tighten the nuts as tight as you can with a ratchet wrench.
 
 
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