Bendix Commercial Vehicle Systems BA-921 SMC COMPRESSOR - Manual (Page 13)

13
BA-921 ® COMPRESSOR SPECIFICATIONS (ALL)
Typical weight ......................................................................... 39 LBS
Number of cylinders ......................................................................... 1
Bore Diameter ....................................................... 3.622 in. (92 mm)
Stroke ................................................................... 2.126 in. (54 mm)
Calculated displacement at 1250 RPM .............................. 15.8 CFM
Flow Capacity @ 1800 RPM & 120 PSI ............................... 11.6 CFM
Flow Capacity @ 3000 RPM & 120 PSI ............................... 16.5 CFM
Approximate horsepower required:
Loaded 1800 RPM at 120 PSIG ............................................... 4.6 HP
Unloaded 1800 RPM ................................................................ 0.8 HP
Minimum coolant fl ow at maximum RPM ..................... 1.5 Gals./Min.
Maximum inlet air temperature ................................................. 170°F
Maximum discharge air temperature ........................................ 400°F
Minimum oil pressure required ................................................. 15 PSI
Minimum unloader-line size ................................................. 3/16" I.D.
Minimum Governor Cut-out Pressure ...................................... 120 PSI
TORQUE SPECIFICATIONS:
Assembly Torques in inch pounds (In. Lbs.)
M8x1.25-6g Cylinder Head ..............265 – 292 In. Lbs. (30 – 33 N•m)
M5x0.75-6g Unloader Cap ..................... 62 – 71 In. Lbs. (7 – 8 N•m)
M8x1.25-6g Governor Adapter ....... 195 – 213 In. Lbs. (22 – 24 N•m)
M10x1.5-6g Rear End Cover ...........195 – 213 In. Lbs. (22 – 24 N•m)
M6x1.00-6g Crankcase Cover ............... 62 – 71 In. Lbs. (7 – 8 N•m)
Inlet Port Fittings
M27x2-6g ..................................991 – 1089 In. Lbs. (112 – 123 N•m)
Discharge Port Fittings
M22x1.5-6H ……….. ......................814 – 912 In. Lbs. (92 – 103 N•m)
Water Port Fittings
M18x1.5-6H ....................................593 – 637 In. Lbs. (67 – 72 N•m)
Unloader Port Fittings
1/8"-27 NPT ...................................................................... 2 – 3 TFFT 1
Safety Valve Port
M16x1.5-6H .....................................230 – 257 In. Lbs. (26 – 29 N•m)
Oil Port
7/16"-16 UNF ..................................150 – 170 In. Lbs. (17 – 19 N•m)
1 Note: TFFT = Turns From Finger Tight
5, 11
1, 7
6, 12
4, 10
2, 8
3, 9
Sequence Torque
(N•m)
1 . . . . . . . . . . . 20
2 . . . . . . . . . . . 20
3 . . . . . . . . . . . 20
4 . . . . . . . . . . . 20
5 . . . . . . . . . . . 20
6 . . . . . . . . . . . 20 Sequence Torque
(N•m)
7 . . . . . . . . . . 31-34
8 . . . . . . . . . . 31-34
9 . . . . . . . . . . 31-34
10 . . . . . . . . . 31-34
11 . . . . . . . . . 31-34
12 . . . . . . . . . 31-34
FIGURE 11 - CLOSED ROOM COMPRESSOR HEAD BOLT
TORQUE SEQUENCE