TRUCK SERVICE MANUAL
a. Altitude or Elevation Conversion
100 feet = 30.48 meters
b. Barometric Pressure Conversion
1 inch Hg. = 25.4 millimeters Hg.
c. Temperature Conversion
F = 9/5 x C + 32
C=F -32 x 5/9
d. Horsepower Conversion
Mkg./Sec. x 7.233 = Ft. Lb./Sec.
Ft. Lbs./Sec. -. .13825 = Mkg./Sec.
Fig. 5-1-2, F5163. Cummins ST-755 Fuel pump test
strand
Fig. 5-1-3, F5164. Cummins ST-445 Fuel pump test
strand
Table 5-1-1: Test Standards For Conversions
Altitude or Elevation
Barometric Pressure
Degrees Temperature and Humidity
Measurement
Relative
System
Feet
Meters
In. Hg.
Mm. Hg.
Fahrenheit
Centigrade
Humidity
Mkg./Sec
Ft.Lb./Sec.
30%
76.04
550.0
Cummins
500
152.4
29.38
746.25
85
29.4
50%
76.04
550.0
SAE
500
152.4
29.38
746.25
85
29.4
50/%
76.04
550.0
British
500
152.4
29.38
746.25
85
29.4
60%
75.00
542.5
Din (Germany)
984
300.0
28.88
733.55
68
20.0
60%
75.00
542.5
Metric
984
300.0
28.88
733.55
68
20.0
Dry Air
*76.04
*550.0
Sea Level
Sea
Sea Level
29.92
759.97
60
15.55
Level
Horsepower for Metric or Din will be 75.00 Mkg/Second or 542.5 Ft.Lb./Sec.
Calibration Instructions
Note: To obtain the 1/16 inch clearance, it may be
necessary to adjust the test stand coupling.
Pump Hookup
4. Squirt some clean test oil into the gear pump inlet
1. Install the proper drive coupling to test stand, which
hole, so pump will pick up faster, then connect suction
matches pump drive shaft coupling, so pump being
line. Fig. 5-1-6.
tested may be driven. See Fig. 5-1-4 and 5-1-5.
5. Fill fuel pump housing with clean test fuel through the
2. Before mounting fuel pump, check the location of the
plug hole on top of pump (fuel inlet fitting on V6-140/V8-
mounting holes; it may be 'necessary to change the test
185 engines). Reinstall plug or fitting.
stand adapter plate.
6. Connect line to fuel pump shut-down valve.
3. Mount fuel pump on the test stand mounting bracket
leaving about 1/16 inch [0.0625 mm] between fuel pump
7. Connect a No. 4 hose to the cooling bleed check
coupling and test stand drive coupling.
valve on
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