OG6:7
RT655 Operator’s Guide
Johnston Sweepers Limited
Chapter - Routine Maintenance
Page Issue A
The brush angle should be set using adjustment (C) and (D) so that only about 120
o
of the
circumference towards the front kerb is in contact with the road.
If a ‘light sweep’ brush pressure is set, then the brush may not position itself outwards. In this case
reset the ‘light sweep’ regulator for a lower pressure. The brush pressure can be adjusted by the
Variabrush feature (A) allowing the brush to be brought forward, (recommended for the off side
brush when deployed) or outwards to position the brush for its best sweeping position. This is a
very useful feature when sweeping between trees, driveways and other items, as you can move the
brush quickly in and out to any position, maintaining the chassis in a straight line.
The brushes have automatic ‘kick-back’ should they come into contact with an object during the
sweeping mode. The head does have a ‘dip angle’ to maintain optimum brush angle. This can be
adjusted as shown below.
Channel Brush Replacement
Ensure the auxiliary engine is not running and isolated before maintenance or
replacement is attempted.
Sharp objects warning - there can be a risk of injury from sharp objects such
as discarded hypodermic needles becoming lodged in the sweeping system.
The use of ‘needle stick gloves’ is recommended when changing brushes,
using the Wanderhose/Littasnatch and when cleaning out the machine.
Safety Notice
Isolate the chassis engine. Turn off the air at the filter regulation unit (item 2 on lubrication diagram).
Pull the channel brush arm out to the working position.
The brush segmented heads are held to the top plate by 2 off 5/8” bolts per segment (8 in total), or
4 off 3/8” bolts (16 in total). Loosen these bolts and remove each segment at a time, replacing with
new filled segments as you go.
In this way the brush top drive plate will remain level during the removal and refitting. Whilst refitting
the brush segments check to see that no wire or tine material has been caught up under the brush
top plate. Remove as required.
Good quality brush segments are recommended.
