Doosan P185WJD-D75, Operating & Maintenance Manual

Page: 47 / 64

MAINTENANCE Operating & Maintenance Manual
Book: 46490694 (03-2010) Rev A 45
Receiver-Separator Systems
WARNING
!
High pressure air can cause severe injury or death from hot oil and flying
parts. Always relieve pressure before removing caps, plugs, covers or
other parts from pressurized air system.
• Open service valve at end of machine.
• Ensure pressure is relieved, with BOTH:
— Discharge air pressure gauge reads zero (0).
— No air discharging from service valve.
Remove plug on fitting in bottom of separator tank to drain compressor oil.
When adding oil, remove and replace (make tight) plug on side of separator tank.
In the compressor lubricating and cooling system, separation of the oil from the compressed
air takes place in the receiver-separator tank. As the compressed air enters the tank, the
change in velocity and direction drop out most of the oil from the air.
Additional separation takes place in the oil separator element which is located in the top
separator element head.
Any oil accumulation in this separator element is continuously drained off by means of a
scavenge system which returns the accumulated oil to the oil circuit.
The life of the oil separator element is dependent upon the operating environment (soot, dust,
etc.) and should be replaced every twelve months or 1000 hours. To replace the element
proceed as follows:
• Ensure the tank pressure is zero.
• Unscrew separator element from manifold.
• Lubricate gasket with compressor oil. Install new element.