37
HYDRAULIC SYSTEM
Oil supply
Check the oil level in the reservoir daily.
No fixed time period can be quoted for oil changes as operating conditions and maintenance
standards vary so widely. Burnt and scorched oil odours and the oil darkening and thickening
are all signs of oxidation and indicate the oil should be changed.
Moisture, which results from condensation, can become entrapped in the oil and cannot be
removed by filtration so that water contamination is progressive.
Contamination can be reduced by:
a)
Cleaning around the reservoir cap before removal, and keeping that area clean.
b)
Using clean containers when replenishing the system.
a) Regular servicing of the filtration system.
Filtration Maintenance
A 125-micron suction strainer and a low-pressure 10-micron full flow return line filter protect
the machine.
Suction strainer
The strainer is permanently fixed within the reservoir.
Should symptoms of pump cavitation or spongy intermittent operation occur the tank must be
drained and flushed out with a suitable cleaning agent e.g. clean diesel oil.
Return Line Filter
The elements should be changed after the first 50 hours and thereafter at 500-hour intervals. It
is important to note hours worked as if the filter becomes blocked an internal by-pass within the
canister will operate and no symptoms of filter malfunction will occur to jog your memory.
Summary of Contents for PA 48
Page 1: ...PA 48 HEDGE GRASS CUTTER Operator Manual Publication 469 December 2004 Part No 41570 69...
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Page 12: ...3...
Page 32: ...ELECTRIC MONOLEVER CONTROLS PROPORTIONAL ELECTRIC CONTROLS 23...
Page 41: ...ROLLER POSITION 32...
Page 42: ...HEDGE CUTTING SEQUENCE 33...
