McHale 991 High Speed Round Bale Wrapper
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10.7 Table drive roller shearbolt replacement
There is a shearbolt fitted to the driven table roller sprocket to prevent overloading of
the table rollers.
If it is broken, it may be replaced as follows:
1. Remove the two handwheels and chainguard over the table roller drive chain
2. Remove the broken parts of shearbolt and discard them safely
3. Line up the hole in the sprocket with hole in the drive flange
4. Fit the replacement M8 x 35 shearbolt (CFA00055) and nut (CFA00132). Do
not fit stronger bolts as replacements!
5. Replace the chain guard and the two handwheels
10.8 Gearbox cross shaft roll pin replacement
As a secondary overload protection device, the gearbox cross shaft is protected by roll
pins which will shear, when overloaded. This mainly applies to older machines as
newer machines have an additional keyway which prevents this from happening.
If this occurs, they may be replaced as follows:
1. Remove the 6 x setscrews holding on the cover of the gearbox. Remove the
cover and gasket.
2. Remove all broken parts of the roll pins
3. Ensure the hole in the table cross shaft and the hole in gearbox cross shaft line
up correctly
4. Fit new roll pins (CFA00006 & CFA00009). Do not fit anything other than these!
5. Replace the gearbox cover ensuring the gasket is serviceable. If not, replace
the gasket with a new part (CSE00006).
6. Replace the 6 x setscrews
Gearbox cross shaft pin replacement
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