OG6:13
RT655 Operator’s Guide
Johnston Sweepers Limited
Chapter - Routine Maintenance
Page Issue A
Filter Regulator Unit (E)
The filter regulator unit comprises a combined air filter/pressure regulator. The air filter can be
manually drained by pushing up the bowl drain tube. The air is isolated and drained by pressing
the red gate valve on the unit.
Air Cleaner Restriction Indicator (F)
A filter restriction indicator gives a positive indication of when the air cleaner
element needs attention and so eliminates haphazard servicing. It should be
remembered that the indicator does not show the amount of dust present in the
dust cap. When the air cleaner requires servicing the red warning indicator (A)
will lock up. After servicing the indicator should be reset by pressing button (B).
It will now show black.
B
A
RTOG. 023
Air Cleaner (G)
The air cleaner should only be serviced when the restriction indicator is showing red, the air cleaner
elements must be cleaned and replaced at the intervals given in the Maintenance Schedule.
D
A
B
C
RTOG. 019-1
Ensure that the elements, lid and clips are correctly fitted and that the air intake
pipe and clips to the engine are in good condition and fully sealed.
Safety Notice
Fuel Lift Pump (H)
The John Deer engine requires an additional electrical lift pump
for the fuel.
The lift pump is constantly self-priming, and has a non-return
valve fitted to stop dry priming. The pumps are voltage related,
12V (7031889) 24V (7044661). 12V shown.
When the chassis ignition is on, the pump will tick as it is
constantly pumping. If it is not ticking, turn the ignition off, wait 1
minute, and retry. If it is still silent, and the engine is not working,
the pump has failed. Replace the pump.
Lift the retaining clips (A) to remove the lid (B). Remove the main filter element (C) by first pushing
the filter down and tilting it towards the radiator and then lift it out. There is a small safety element
(D) within the main filter body, this should be replaced every third time the main element is changed.
Re-assemble the air cleaner ensuring all parts are correctly positioned and fitted. Refit plug (A)
ensuring a good seal against water ingress.