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 r ecommended discharge shut---
off valve and releasing all internal pressure from
compressor.
As you proceed in reading this section, it will be
easy to see that the Maintenance Program for the
aircompressorisquiteminimalyetimportant.See
instructions for each item in Section 6.6, Parts Re-
placement and Adjustment Procedures.
6.2 D AILY 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 ad-
dition of fluid becomes too frequent, a minor prob-
lem has developed which is causing this excessive
loss. See the Troubleshooting Section (6.7) under
Excessive 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 t o
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 r ecommended discharge shut---
off valve and releasing all internal pressure from
compressor.
See Table 1, Motor Bearing Lubrication Schedule. 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 a 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 is 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
motor 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,
Ta b l e 3 --- 1 i n S e c t i o n 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 r ecommended discharge shut---
off valve and releasing all internal pressure from
compressor.
STANDARD
CONDITIONS
(I)
SEVERE
CONDITIONS
(II)
EXTREME
CONDITIONS
(III)
MODEL
(I) Eight hours per day, normal or light loading, clean 38_Cmaximumambient.
(II) Twenty--- four hours per day operation or shock loadings, vibration, or in dirt or dust at 38_Cto66_Cambient.
(III) Heavy shock or vibration, dirt or dust at 38_Cto66_Cambient.
4 kw 3 years 1 year 6 months
5.5 kw 2 1/2 years 10 1/2 months 5 1/2 months
7.5 kw 2 1/2 years 10 1/2 months 5 1/2 months
Motors over
1800 RPM 6 months 3 months 3 months
Table 1 --- Motor Bearing Lubrication Schedule
To Next Page
Loading...
