Doosan 7/20, Руководство по эксплуатации и обслуживанию

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28 MAINTENANCE
7/20, P65
COMPRESSOR OIL FILTER
Refer to the MAINTENANCE SHEDULE in this section for the
recommended servicing intervals.
Removal
Clean the exterior of the filter housing and remove the spin-on element
by turning it in a counter-clockwise direction.
Inspection
Examine the filter element.
Reassembly
Clean the filter gasket contact area and install the new element by
screwing in a clockwise direction until the gasket makes contact with
the filter housing. Tighten a further
1
/
2
to
3
/
4
of a revolution.
COMPRESSOR OIL SEPARATOR ELEMENT
Normally the separator element will not require periodic maintenance
provided that the air and oil filter elements are correctly maintained.
If, however, the element has to be replaced, then proceed as follows:
Removal
Disconnect all hoses and tubes from the separator tank cover plate.
Remove the drop-tube from the separator tank cover plate and then
remove the cover plate. Remove the separator element.
Inspection
Examine the filter element. Examine all hoses and tubes, and replace
if necessary.
Reassembly
Thoroughly clean the orifice/drop tube and filter gasket contact area
before reassembly. Install the new element.
Reposition the cover plate, taking care not to damage the gasket, and
replace the cover plate screws tightening in a criss-cross pattern to the
recommended torque (refer to the
TORQUE SETTING TABLE later in
this section).
Engage the adaptor in the cover plate with the drop-tube integral with
the filter, reconnect all hoses and tubes to the separator tank cover
plate.
Replace the compressor oil (refer to LUBRICATION later in this
section).
COMPRESSOR OIL COOLER AND ENGINE RADIATOR
When grease, oil and dirt accumulate on the exterior surfaces of the oil
cooler and radiator, the efficiency is impaired. It is recommended that
each month the oil cooler and radiator be cleaned by directing a jet of
compressed air, (carrying if possible a non-flammable cleaning
solvent) over the exterior core of the cooler/radiator. This should
remove any accumulation of oil, grease and dirt from the exterior core
of the cooler so that the entire cooling area can radiate the heat of the
lubricating and cooling oil/coolant into the air stream.
AIR FILTER ELEMENTS
The air filter should be inspected regularly (refer to the
MAINTENANCE SHEDULE ) and the element replaced when the
restriction indicator shows red or every 6 Months (500 hours),
whichever comes first. The dust collector box(es) should be cleaned
daily (more frequently in dusty operating conditions) and not allowed to
become more than half full.
Removal
Clean the exterior of the filter housing and remove the filter element by
releasing the nut.
Inspection
Check for cracks, holes or any other damage to the element by holding
it up to a light source, or by passing a lamp inside.
Check the seal at the end of the element and replace if any sign of
damage is evident.
Reassembly
Assemble the new element into the filter housing ensuring that the seal
seats properly.
Reset the restriction indicator by depressing the rubber diaphragm.
Assemble the dust collector box parts, ensuring that they are correctly
positioned.
Before restarting the machine, check that all clamps are tight.
WARNING: Do not remove the filter(s) without first making sure
that the machine is stopped and the system has been
completely relieved of all air pressure. (Refer to
STOPPING THE
UNIT in the OPERATING INSTRUCTIONS section of this
manual).
CAUTION: If there is any indication of the formation of varnishes,
shellacs or lacquers on the filter element, it is a warning that the
compressor lubricating and cooling oil has deteriorated and that it
should be changed immediately. Refer to LUBRICATION later in this
section.
CAUTION: Start the machine (refer to PRIOR TO STARTING and
STARTING THE UNIT in the OPERATING INSTRUCTIONS section
of this manual) and check for leakage before the machine is put back
into service.
WARNING: Do not remove the filter(s) without first making sure
that the machine is stopped and the system has been
completely relieved of all air pressure. (Refer to
STOPPING THE
UNIT in the OPERATING INSTRUCTIONS section of this
manual).
WARNING: Do not remove the staple from the anti-static gasket
on the separator element since it serves to ground any possible
static build-up. Do not use gasket sealant since this will affect
electrical conductance.
CAUTION: Start the machine (refer to PRIOR TO STARTING and
STARTING THE UNIT in the OPERATING INSTRUCTIONS section
of this manual) and check for leakage before the machine is put back
into service.
WARNING: Hot engine coolant and steam can cause injury.
When adding coolant or antifreeze solution to the engine
radiator, stop the engine at least one minute prior to releasing
the radiator filler cap. Using a cloth to protect the hand, slowly
release the filler cap, absorbing any released fluid with the cloth.
Do not remove the filler cap until all excess fluid is released and
the engine cooling system fully depressurised.
WARNING: Follow the instructions provided by the antifreeze
supplier when adding or draining the antifreeze solution. It is
advisable to wear personal protective equipment to prevent skin
and eye contact with the antifreeze solution.
CAUTION: Never remove and replace element(s) when the machine
is running.