This model of Troybilt chipper/shreader has 2 blades.
http://www.ebay.com/itm/2-Blades-for-Troy-Bilt-Chipper-742-0544-942-0544-742-0544A-942-0544A-742-0653-/311506089083
This is from the Toro owners manual for SR4 euper recycler model 20058 serial number 250003464
The steps and picture are on page 18 of the manual 3352-864[1].pdf
You can enter those numbers on this page for a manual:
https://lookup3.toro.com/request/request.cfm
1. Disconnect the spark plug wire from the spark
plug. Refer to Preparing for Maintenance
2. Tip the mower onto its side with the air filter up.
3. Remove the
2 blade nuts (A)
and the
stiffener (B).
4. Remove the
blade (C).
5. Install the blade and the stiffener that you
removed in steps 3 and 4.
6. Install the blade bolts and torque them to 15 to
27 ft-lb (20 to 37 N?m).
The replacement blade part number is:
108-3762-03 (google / net search)
Thanks for choosing FixYa,
Kelly
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