Brouwer RoboMax, Operator'S Manual

Page: 55 / 84

MAINTENANCE
Crankshaft Bearings and Sheave.
To remove the Crankshaft Bearings:
•
Remove the Connecting Rods. See page4-8.
•
Back-off the Lock-Collar Set Screw.
•
Use a suitable Drift or Punch to release the
Lock-Collar ‘ A ’.
NOTE
Lock-collars are ‘tightened’ in the direction of rotation,
and released in the opposite direction.
•
If the Crankshaft is to be re-used, carefully
clean-up the shaft ends, where the Connecting
Rod Bearings fit, and remove the Crankshaft
Bearings.
To remove/install the Crankshaft Sheave:
•
Remove the three Bushing Bolts ‘ B ’.
•
Fit three bolts into the threaded holes ‘ C ’
and tighten them ‘evenly’ to release the Taper
Lock Bushing ‘
D ’.
Remove the Sheave from the Shaft.
NOTE
Apply ‘Anti-Seize’ to the Crank Shaft when fitting the
Bearings and Sheave, to ease assembly and prevent
rust/corrosion forming.
When fitting a new Sheave, slide it onto the Shaft, but
do not tighten the Taper Lock Bushing Bolts, it will have
to be aligned with the Drive Motor Sheave when the
Crank-Shaft Assembly is installed in the frame.
IMPORTANT
If the Crankshaft Assembly is for a 24 inch machine
the Driven Sheave
must be fitted
with the Taper Lock
Bushing Facing as shown. This gives clearance from
the Counter Balance Weight ‘
E ’ and allows the Bushing
Bolts ‘ B ’, to be removed/replaced.
Also Shim Plates are fitted between the Bearings and
the Frame to prevent the Counter Balance Weights from
‘jamming’ against the frame.
See page 4-10 for removal of Counter-Balance Weights.
Fitting new Crankshaft Bearings:
•
Check that the Shaft is free of scratches, marks
or rust, that will hinder assembly.
•
Fit the Bearings onto the Shaft, with the Lock-
Collars ‘
F ’ facing ‘inwards’.
•
Position the Bearings as shown, with the face ‘ G ’
½ inch from the shoulder ‘ H ’ on the shaft.
Tighten the Lock-Collar ‘ A ’ and the Set Screw..
Fit the Connecting Rods, Washers and Retainer Bolts
onto the Crank-Shaft.
The assembly can now be installed into the frame.
4-09