Blue Diamond Drum Mulcher, Operation And Maintenance Manual, Page: 40 / 90

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Drum Mulcher Operation and Maintenance Manual
Maintenance
Sprocket
Removal
Figure 17
1. Remove the drive belt; see “Drive Belt” on
page 36 for belt removal and replacement
instructions.
2. Loosen and remove all taper lock mounting
screws.
3. Insert the screws into all jack screw holes
indicated by (•) [Figure 17] .
4. Remove the taper lock and key.
5. Loosen the bushing by alternately tightening
the screws in small but equal increments until
sprocket and bushing surfaces disengage.
6. Remove sprocket.
Installation
NOTE: Do not lubricate the bushing taper, hub
taper, bushing bore, or shaft. Doing so
could result in sprocket breakage.
1. Clean the sprocket of all oil paint and dirt.
2. File off any burrs.
3. Insert bushing into the sprocket hub. Match the
hole pattern, each complete hole will only be
threaded on one side.
4. Lightly oil the screws and thread them into the
half threaded holes indicated by (O) [Figure
17] .
5. Place the key in the shaft keyway, ensure it is
fully in the slot.
6. Position the assembly onto the shaft, allow for
small axial movement of the sprocket which will
occur during tightening process.
7. Insert a flat head screw driver in the gap of the
taper lock to widen and fit onto the shaft.
8. Alternately torque the screws until the sprocket
and bushing tapers are completely seated
together;
approximately half of the
recommended torque, see table below.
9. Check alignment of both upper and lower
sprockets; adjust as necessary.
10. Torque the screws alternately to the
recommended torque values.
11. Recheck all screw torque values after initial
drive run in.
Torque Specifications
34 Teeth
50Teeth
Bushing
Style
Bolts Torque
Qty Size ft-lb N•m
34 Teeth 2 1/2 x 13 x 1 35.8 49
50 Teeth 3 1/2 x 13 x 1 x 1/2 83.3 113