Section 6
MAINTENANCE
17
6.1 GENERAL
WARNING
!
Before doing compressor maintenance, discon-
nect compressor from power source and lock out
power source. Isolate compressor from line pres-
sure by closing recommended discharge shut--
off valve and releasing all internal pressure from
compressor.
As youproceed in reading this section, it will be easy
to see that the Maintenance Program for the air
compressor is quite minimal yet important. See in-
s t r uc t ions for eac h item in Sec tion 6.6, Par t s R e-
plac ement and Adjus t ment Pr oc edur es .
6.2 DAILY OPERATION
Prior to starting the compressor, it is necessary to
check the fluid level in the sump. Should the level be
low, simply add the necessary amount. If the addi-
tion of fluid becomes too frequent, a minor problem
has developed which is causing this excessive loss.
See t he Tr oubles hooting Sec tion ( 6.7) under Ex c es -
sive Fluid Consumption for a probable cause and
remedy.
After a routine start has been made, a general check
of the overall compressor should be made to assure
that the compressor is running properly.
6.3 MOTOR BEARING LUBRICATION
WARNING
!
Before doing compressor maintenance, discon-
nect compressor from power source and lock out
power source. Isolate compressor from line pres-
sure by closing recommended discharge shut--
off valve and releasing all internal pressure from
compressor.
See Table 6- 1, Motor Bear ing Lubr ic ation Sc hedule.
If lubrication instructions are shown on the motor or
in a separately provided manual, they will super-
cede this general instruction.
1. Remove the fan guard by removing the four (4)
self--tapping screws holding the guard and fan
ring to the cooler.
2. Remove the 1/8” NPT plugs in the filler and drain
connection for both bearings.
3. Free drain hole of any hard grease (use piece of
wire if necessary).
4. Add grease
(I)
using a low pressure grease gun.
5. Wipe off any drained grease, and replace filler
and drain plugs.
6. Replace fan guard.
7. Motor i s now ready for operation.
(I)
Use Chevron SRI--2 grease when lubricating
motor bearings. Fill the cavity 1/3 to 1/2 full by
repacking or use a low pressure grease gun and
fill through the lubricating provisions on the mo-
tor end bell housing.
6.4 FLUID FILTER MAINTENANCE
WARNING
!
Fluid filter has internal bypass. DO NOT SUBSTI-
TUTE.
Replace the fluid filter element under any of the fol-
lowing conditions:
1. As recommended in the Lubrication Guide in
Section 3.
2. Every year.
3. Every fluid change.
6.5 COOLER MAINTENANCE
If cooler becomes restricted, use standard spray de-
greaser/cleaner and brush to clean cooler. Use air
pressure to blow cooler clean. Care must be taken
as not to damage cooler fins.
WARNING
!
Before doing compressor maintenance, discon-
nect compressor from power source and lock out
power source. Isolate compressor from line pres-
sure by closing recommended discharge shut--
off valve and releasing all internal pressure from
compressor.
STANDARD
CONDITIONS
(I)
SEVERE
CONDITIONS
(II)
EXTREME
CONDITIONS
(III)
5HP (4KW) 3 Years 1 Year 6 Months
7.5 and 10HP 2.5 Years 10 1/2Months 5 1/2 Months
(5.5 & 7.5KW)
All Motors
Over 1800 RPM 6 Months 3 Months 3 Months
MODEL
(I)
Eight hours per day, normal or light loading, clean 100
_
F(38
_
C) maximum ambient.
(II)
Twenty--four hours per day operation or shock loadings, vibration, or in dirt or dust at 100
_
F to 104
_
F(38
_
Cto
40
_
C) ambient.
(III)
Heavy shock or vibration, dirt or dust at 100
_
F to 104
_
F(38
_
Cto40
_
C) ambient.
Table 6-1- Motor Bearing Lubrication Schedule
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