BEF275-1
Operating Manual
MAINTENANCE
Prior to any maintenance or adjustment, stop the engine.
After use:
Clean the machine to remove all build up of dust and surface residues. If using a hose
pipe or pressure washer take care that water is not directed onto the engine and switches.
Note:
Engine and switches are not waterproof
Drum removal:
Remove the bolts on the side plate and then screw two of the bolts back into the two tapped holes
in the side plate. Continue winding these bolts in and this will push the side plate off the dowel
pins. Remove the side plate. Pull out the cutting drum - the drive shaft may come out with the
drum assembly as this is only a push fit into the drive bush.
Fitting a new cutter drum is simply a reversal of the above procedure, a little care must be taken to
align the drive shaft, cutter drum and support end drive bush.
EXCESSIVE FORCE IS NOT NEEDED TO REFIT THE CUTTER DRUM.
Cutter Drum Maintenance:
When changing the cutter drum always check that the flail shafts are not worn with pronounced
grooves and also that the centres of cutters and spacers are not elongated and beginning to
"mushroom". The drum assembly is hitting concrete with great force at over 1,600 times every
minute! Expenditure on consumables must be expected and built into all job costing.
While changing the drum, the condition of the drive shaft and side plate bearings should be
checked. If any roughness, side play or leakage of grease is detected, then new bearings should
be fitted. Lightly oiling the drive shaft will prevent a build up of rust which could cause difficulty
when changing the drum. At the same time check the belt tension and condition, also checking
the pulley grooves are clean and undamaged.
The drive shaft is manufactured from high quality steel and then heat treated to produce the
special properties required. The shaft is extremely strong and virtually unbreakable when used as
intended. If, however, sideways pressure is exerted on the shaft while not supported at both ends
then it can be damaged.
With the drum removed, check that the vacuum port is free from blockages and that the dust skirt
is in good condition.
Remove all build up and deposits of material from the under side of the drum housing. On certain
applications, e.g. the removal of damp self levelling compounds, it may be necessary to clean
away deposits hourly! Failure to do so could result in overload of the drum assembly, engine and
the drive belts.
Cont’d ………
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