SPE BEF200N, Руководство пользователя и каталог запасных частей, Страница: 9 / 32

BEF200N
PARTS BOOK
OIPB-S18001
9
CUTTER DRUM REMOVAL
1. Isolate the power supply and ensure the cutter drum has stopped rotating.
2. Raise the Quick-Lift lever so that the cutters are clear from the ground.
3. Loosen the four 8mm set screws and remove the side plate. This cover can stick
when brand new, so it may be necessary to lever off the plate with a screwdriver.
4. With the side plate removed the cutter drum will simply slide off the drive shaft.
5. Fitting a new cutter head is simply a reversal of the steps 1-4. Ensure that the four
8mm set screws are always tight.
CUTTER DRUM MAINTENANCE
When changing a cutter drum always check that the flail shafts are not excessively worn
with pronounced grooves and that the centres of cutters and spacers are not elongated or
beginning to mushroom. The screws which hold the drum end plates in position must be
tight and in good condition.
It is expensive and false economy to run the cutter drum components until they break. Try
to establish a routine for replacing wear parts before they cause problems. Remember that
the drum assembly is hitting concrete with great force 1,800 times every minute, therefore
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 there is any roughness, side-play, or leakage of grease is detected, 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.
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 it is not
supported by the side plate bearing, then it can be bent.
With the drum removed check that the vacuum port is free from blockages and that the dust
skirt is in good condition.