Goff 2460, Operation And Maintenance Manual

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13. This will allow access to the back side to remove the sixteen socket cap screws (Items 37 &
39) holding the blade blocks (Item 19).
14.
Hold one of the blade blocks (Item 19) from inside the housing and remove the socket head
screw attaching it to the bare wheel. These screws are located on the inner bolt circle.
Remove each of the remaining blade blocks in the same manner.
15. After all eight blade blocks have been removed; the bare wheel (Item 3) will be free to fall
away from the hub (Item 2). Tilt the bare wheel forward and remove it through the top of the
housing.
16. Remove the two socket set screws in the taper lock bushing. Lightly oil one of the screws
and re-install it in the third hole on the bushing. Be sure the hole is free of abrasive. This
hole is threaded only on the bushing side, the side nearest the motor shaft. Tighten this
screw until the hub releases from the taper lock bushing.
If
the hub does not release, tap the
face of the hub using a bronze drift and tighten the screw again. When the hub is loose on
the bushing, slide the taper lock assembly off the end of the motor shaft.
17. Remove the hub and key from the motor shaft.
18. Clean the motor shaft and all blast wheel components. Inspect the keyway in the motor shaft
and the key for wear. Check the motor shaft for end play.
19.
Inspect front and back side liners (Item 16) for wear.
If
liners are worn to one half their
original thicknesses, they should be replaced. Remove the retaining bolts holding the front
side liner and remove. Repeat this step on the back side liner. The side liners must be
removed through the bottom of the blast housing.
20.
If
the blast wheel motor runs smoothly, the blast wheel can be re-assembled. All badly worn
parts should be replaced to assure a smooth running final assembly. If vibration still exists,
the motor may need to be repaired or replaced. Be sure all motor or electrical repairs or
replacements are done by a qualified electrician or serviceperson.
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