Doosan 7/73-10/53, Operation And Maintenance Manual

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MAINTENANCE 35
7/73 - 10/53
It is necessary to isolate the compressor package from the carrier base
with a flexible mounting system. Such a system must also prevent
detachment of the package from the carrier base in the event the
isolators fail.
Contact your Portable Power representative for flexible mounting kits.
Warranty does not cover failures attributable to mounting of the
compressor package to the carrier base unless it is a Portable Power
provided system.
SPEED AND PRESSURE REGULATION ADJUSTMENT
Normally, regulation requires no adjusting, but if correct adjustment is
lost, proceed as follows:
Before Starting
1. Select Low Pressure Mode by turning HI/LO Pressure Switch on
control panel.
2. At the Low Pressure Regulator (A), pull the plastic cap upwards to
unlock and turn counter clockwise until tension is relieved. Proceed
to turn the cap clockwise one full turn.
3. If high pressure regulation needs adjustment, repeat Step 2 at High
Pressure Regulator (B).
4. Close Service Valves.
After Starting Unit
5. Push the Service Air Button on the Control Panel. The unit should
speed up and then unload (and drop back to IDLE). With the unit
unloaded, turn the adjusting cap on the Low Pressure Regulator (A)
clockwise until the discharge pressure gauge indicates 8,6-9 bar.
Push the plastic cap downwards to lock.
6. To adjust the high pressure regulation, repeat Step 5 on High
Pressure Regulator (B) except adjust pressure at idle to 12,1-12,4
bar while in High Pressure Mode.
NOTE: The maintenance schedule in this manual describes the
service intervals that should be followed for “normal” applications of
this compressor. This page may be reproduced and used as a
checklist by service personnel.
In more severe applications such as sandblasting, quarry drilling, well
drilling, and oil and gas drilling, more frequent service intervals will be
required to ensure long component life.
Dust and dirt, high humidity, and high temperatures will affect
lubricant life and service intervals for components such as inlet air
filters, oil separation elements and oil filters.
NOTE: The High Pressure Regulator (B) must be set at a higher
pressure than the Low Pressure Regulator (A).