OG6:11
RT655 Operator’s Guide
Johnston Sweepers Limited
Chapter - Routine Maintenance
Page Issue A
With the screen removed and the body raised and resting on its prop, clean out all debris from the
roof duct which runs along the top of the body, using a hose and broom. Care should be taken not
to get water in the fan case.
When refitting the screen, ensure it is a close fit against the mating faces. Adjustment is provided
so that debris is prevented from entering the fan. Replace the linch pin.
Water Filter - Cleaning
The water filter (Item 27, Fig. 1) for the low pressure pump is on the near side of the machine. The
filter is equipped with an integral shut off valve to prevent the water tank from draining should the
filter need dismantling for cleaning whilst there is still water in the tank.
1 Before dismantling the filter, activate the shut off valve
actuator (A) located on the bottom of the filter. It has
a bayonet type mechanism. Press up and turn anti-
clockwise to position (i) to shut the valve.
2 To access the filter element, unscrew securing ring (B)
and remove body section (C), complete with shut off
valve. The filter element (D) can now be withdrawn.
3 Clean the element by flushing with clean water or an
air line from the inside out. Visually inspect the element
for damage and replace if necessary.
4 When reassembling the filter, special care should
be taken to ensure that the filter element is correctly
(squarely) located in the filter body before tightening
the securing ring.
5 Refit the shut off valve actuator. Press up and turn
clockwise to position (ii) to open the valve ready for
use.
If Supawash is fitted there will be additional filter that feeds the Supawash pump.
Ensure the screen is lowered slowly. If the mesh is allowed to ‘free fall’ and
bounce off of the baffle, there is a possibility of it being dislodged
from the hinge point.
90
o
A
B
C
D
RTOG. 006-1
ii
i
