PREVOST X3-45 Multiplex User Manual

10
RPM., the time required to raise the reservoir(s) pressure
from 85 psi to 100 psi should not exceed 5 seconds. Dur-
ing this test, the compressor should be checked for gasket
leakage and noisy operation, as well as unloader opera-
tion and leakage. If the compressor functions as indicated
reinstall on the vehicle connecting all lines as marked in
the disassembly procedure.
BA-921 SPECIFICATIONS
Typical weight ....................................................... 28 lbs.
Number of cylinders ...................................................... 1
Bore Diameter ....................................... 92mm (3.622 in.)
Stroke ...................................................54 mm (2.125 in.)
Calculated displacement at 1250 RPM............. 15.8 CFM
Flow Capacity @ 1800 RPM & 120 PSI ............ 11.8 CFM
Flow Capacity @ 3000 RPM & 120 PSI ............ 18.0 CFM
Maximum recommended RPM ........................ 3000 RPM
Minimum coolant flow maximum RPM ...... 1.3 Gals./Min.
Approximate horsepower required:
Loaded 1800 RPM at 120 PSIG ........................... 4.5 HP
Unloaded 1800 RPM ............................................ 1.3 HP
Maximum inlet air temperature .............................. 250 F°
Maximum discharge air temperature ..................... 400 F°
Minimum oil pressure required at
engine idling speed ............................................... 15 PSI
Minimum oil pressure required at
maximum governed engine speed ......................... 15 PSI
Minimum oil-supply line size ............................. 3/16" I.D.
Minimum unloader-line size ............................... 3/16" I.D.
Minimum Governor Cutout Pressure .......................90 PSI
TORQUE SPECIFICATIONS
Assembly Torques in inch pounds (in. Ibs.)
M8x1.25-6g Cylinder Head .................................265 - 292
M5x0.75-6g Unloader Cap ..................................... 62 - 71
M8x1.25-6g Governor Adapter ............................133 - 142
M8x1.25-6g Rear End Cover ...............................195 - 213
M6x1.00-6g Crankcase Cover............................... 62 - 71
M20x2.50-6g Crankshaft Nut ......................... 1858 - 2567
Inlet Port Fittings
7/8"-12 UNF .......................................................221 - 248
3/4"-14 NPT .................................................... 2 - 3 TFFT
1
Discharge Port Fittings
7/8"-12 UNF .......................................................221 - 248
3/4"-14 NPT .................................................... 2 - 3 TFFT
1
Water Port Fittings
3/4"-16 UNF .......................................................221 - 248
3/8"-18 NPT .................................................... 2 - 3 TFFT
1
Unloader Port Fittings
1/8"-27 NPT .................................................... 2 - 3 TFFT
1
Safety Valve Port
3/4"-16 UNF .......................................................221 - 248
1/2"-14 NPT .................................................... 2 - 3 TFFT
1
Oil Port 7/16"-16 UNF ........................................177 - 204
1
Note: TFFT = Turns From Finger Tight

PREVOST X3-45 Multiplex Specifications

General

Length	45 ft
Width	102 in
Engine	Volvo D13
Horsepower	500 hp
GVWR	54, 000 lbs
Height	146 in
Sleeping Capacity	Varies based on floor plan
Water Capacity	Varies based on floor plan