27
Satisfactory performance of a stationary
screw air compressor requires a good
preventive maintenance program.
The following information is provided as a
guide for such a program.
START UP
Daily start up may be accomplished as
follows:
1. Drain the condensate (water) from the
oil reservoir. Close the drain valve
securely when oil appears.
2. Check the compressor oil reservoir oil
level.
NOTICE
THE RESERVOIR IS FULL WHEN THE OIL
LEVEL REACHES THE BOTTOM OF THE
FILLER HOLE. IF OIL COVERS THE SIGHT
GAGE IT IS SAFE TO OPERATE THE
UNIT.
3. Operate the air receiver-oil reservoir
pressure relief valve manually to make
certain it will open.
4. Make certain adequate ventilation is
provided.
5. Open the service valve which connects
the unit to the system receiver
(distribution piping) and actuate the
START switch to start the unit.
6. Observe all indicators and gages for
proper reading. If the indicators read
normally, the unit may be continued in
service.
SHUT DOWN
1. Allow the unit to fully unload.
2. Push the stop switch to shut the unit
down.
PREVENTIVE MAINTENANCE
Regular testing of oil as specified in the
following maintenance guide is intended to
assist in establishing oil and oil filter change
intervals.
It is possible, however, to obtain information
about the wear characteristics of the machine
with continued oil testing. The oil test
performed should include analyzing the
particulate matter in the oil sample, as well
as testing for oxidation inhibitors and anti-rust
additives.
As an example, an increase in cast iron
particles in an oil sample may give advance
warning of excessive wear. This information
could possibly prevent damaging the entire
unit beyond repair, without periodic
disassembly and visual inspections.
Normally the oil analysis sheet will list the
results of the oil test, in addition to
recommendations of the analyzing laboratory
showing what maintenance is required.
The following information is furnished as a
guide to the critical limits of items which are
listed in an oil analysis sheet.
Viscosity increase.............10% over new oil
Neutral No. Increase.........0.5% over new oil
Total solids by weight .......................0.21%
Oxidation, by weight, oxidized material..11%
Sediment, by volume ........................0.21%
Water, by volume ...............................0.5%
DAILY
1. Check the air cleaner and service as
required.
NOTICE
ALWAYS DRAIN CONDENSATE AFTER
THE UNIT HAS BEEN SHUT DOWN FOR A
REASONABLE LENGTH OF TIME
(USUALLY OVER NIGHT) ALLOWING THE
WATER TO SETTLE.
2. Check the compressor oil reservoir oil
level. Add correct type of oil as required.
DO NOT OVER FILL.
NOTICE
SECTION V
OPERATION AND PREVENTIVE MAINTENANCE
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