with oil FSN 9150-753-4667, and check the
a. Four-Hour Special Run.
operation of the compressor group for the
required values indicated in table 1.
(1)
Assemble the compressor group to the test
stand, fill the oil sump to the required level
Table I. Four-Hour Run-In Procedure.
Start
Speed
Back pressure
Blowby
Maximum oil
Oil
Change
time
(rpm)
(psig)
(cfm)
consumption
leakage
time
0
1500 - 2000
400 + 200
5
7 cc/hr
None
2:00
2:00
2500 100
1000 100
5
7 cc/hr
None
3:00
3:00
3600 100
2000 100
5
7 cc/hr
None
4:00
Note. This pump-up time procedure is accomplished
(2) Connect the aftercooler to the water
after all special runs.
separator or a suitable reservoir whose
b. Eight-Hour Special Run.
capacity is 208 3 cu. in. and determine
maximum pump-up time from 0 to 2000 psig
(1) Assemble the compressor group to the test
when operating at 3600 100 rpm. The
stand, fill the oil sump to the required level
maximum pump-up time is five minutes and
using oil FSN 9150753-4667 and check the
thirty seconds.
operation of the compressor group for the
required values indicated in table II.
Table II. Eight-Hour Run-In Procedure
Start
Speed
Sack pressure
Blowby
Maximum oil
Oil
Change
time
(rpm)
(psig)
(cfm)
consumption
leakage
time
0
1500 -2000
400 + 200
5
7 cc/hr
None
2:00
2:60
2500 100
1000 100
5
7 cc/hr
None
5:00
5:00
3600 100
2000 100
5
7 cc/hr
None
8:00
test stand, fill the oil sump to the required level with oil
(2) Check the pump-up time as indicated in the
FSN 9150-7534667, and check the operation of the
four-hour special run, (a (2) above).
compressor group for the required values indicated in
c. One-Hour Special Run.
table III.
(1) Assemble the compressor group to the
Table III. One-Hour Run-In Procedure
Start
Speed
Back pressure
Blowby
Maximum oil
Oil
Chan-e
time
(rpm)
(psig)
(cfm)
consumption
leakage
time
0
1500 - 2000
400 + 200
5
7 cc/hr
None
1:00
washers (1). Apply a torque between 8 to 9 pound-feet
(2) Check the pump-up time as indicated in the
to the four screws (2).
four-hour special run (a (2) above).
b. Replace the fan guard section (par. 25a) and
48. Installation (fig. 10)
intercooler and aftercooler section (par.).
a. Position the compressor group on the gasoline
engine and secure using the four bolts (2) and four
AGO 5548A
32