CATERPILLAR® ENGINE SPECIFICATIONS

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Diesel Truck Engine 3126B 175-330 hp 420-860 lb-ft @ 1440 rpm Peak Torque CATERPILLAR® ENGINE SPECIFICATIONS 6-Cylinder, 4-Stroke-Cycle Diesel Bore — in (mm) . . . . . . . . . . . . . . . . . . . . . 4.33 (110) Stroke — in (mm) . . . . . . . . . . . . . . . . . . . . 5.0 (127) Displacement — cu in (L) . . . . . . . . . . . . . 439 (7.2) Aspiration . . . . . . . . . . . . . . . . . . . . . . . . . . . . ATAAC1 Compression Ratio 175-300 hp . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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  DieselTruckEngine CATERPILLAR ® ENGINE SPECIFICATIONS 6-Cylinder, 4-Stroke-Cycle DieselBore — in (mm).....................4.33 (110)Stroke — in (mm)....................5.0 (127)Displacement — cu in (L).............439 (7.2)Aspiration............................ATAAC 1 Compression Ratio175-300 hp.............................16:1Rotation (from flywheel end)..CounterclockwiseCooling System 2 —gal (L)............3.5 (13.2)Lube Oil System (refill) —gal (L)....4.75 (18.0) 3 Weight, Net Dry (approx) — lb (kg)Including Flywheel................1295 (588) 1 Air-to-Air AfterCooling 2 Engine Only. Capacity will vary with radiator size and useof cab heater. 3 Optional 28L (7.5 gal) oil pan also available in somechassis. ACCESSORY EQUIPMENT Air compressor: gear driven, 0.37 m 3  /min(13.2 cfm) or 0.46 m 3  /min(16.5 cfm)Air conditioner compressor mountingAir inlet elbowAuxiliary brake compatible (exhaust)Ether starting aid/adaptationFan drive mounting bracketFan driveFront engine supportFront PTO adapterJacket water heaterRear power take-offStarting motor: 12 V or 24 VTurbocharger compressor outlet elbowHydraulic pump drive, SAE A STANDARD EQUIPMENT Air inlet manifold heaterCooling: belt-driven jacket water pump,oil coolerCrankcase breatherElectronic Control Module (ECM)Electronic Data Link, SAE J1922, J1939,ATA J1587HEUI Fuel System (Hydraulically actuated,Electronically controlled Unit Injector)Flywheel and SAE No. 1 or SAE No. 2 housingFuel: spin-on secondary filter, transfer pump,hand priming pumpGovernor: full-range, electronically controlledLifting eyesLubrication: gear-driven pump, front or rearsump, full flow spin-on filter, left-hand sideoil level gauge (dipstick)TurbochargerVibration damper DIMENSIONS 3126B 175-330 hp 420-860 lb-ft @ 1440 rpm Peak Torque 42.5 in(1078 mm)31.4 in(798 mm)34.0 in(862 mm) Shown withOptional Equipment  PERFORMANCE DATAPERFORMANCE DATA Max hp (kW).............................175 (131)Advertised hp (kW).......................175 (131)Operating Range (rpm)............1440-2500 (1060)Maximum Engine rpm........................2640Governed Speed rpm.........................2500Peak Torque — lb-ft (Nãm).................420 (569)Peak Torque rpm.............................1440Torque Rise (%) (Gov. rpm)......................25Altitude Capability — ft (m)............10 000 (3050)Max hp (kW).............................207 (154)Advertised hp (kW).......................190 (142)Operating Range (rpm)............1440-2500 (1060)Maximum Engine rpm........................2640Governed Speed rpm.........................2500Peak Torque — lb-ft (Nãm).................520 (705)Peak Torque rpm.............................1440Torque Rise (%) (Gov. rpm)......................27Altitude Capability — ft (m)............10 000 (3050) 1700 1900 2100 2300 2500 Engine Speed rpm175 hp (131 kW) DM3276 80100    T  o  r  q  u  e   l   b  -   f   t   P  o  w  e  r   b   h  p 3502501504501601801201401500    T  o  r  q  u  e   l   b  -   f   t   P  o  w  e  r   b   h  p 1500 1700 1900 2100 2300 2500 Engine Speed rpm 150400430490460520210 190 hp (142 kW) DM4201 170190 PERFORMANCE CURVES 1500 1700 1900 2100 2300 2500 Engine Speed rpm210 AT* (156 kW) DM4202 140160    T  o  r  q  u  e   l   b  -   f   t   P  o  w  e  r   b   h  p 365425545485605220180200 * Approved for use with the AT 545 Transmission1500 1700 1900 2100 2300 2500 Engine Speed rpm210/210HT hp (156 kW) DM3278/DM3279 140160    T  o  r  q  u  e   l   b  -   f   t   P  o  w  e  r   b   h  p 365425545485605220180200 High TorqueStd. Torque 3126B T RUCK ENGINES – 175-330 hp PERFORMANCE CURVES Max hp (kW).............................216 (161)Advertised hp (kW).......................210 (156)Operating Range (rpm)............1440-2500 (1060)Maximum Engine rpm........................2640Governed Speed rpm.........................2500Peak Torque — lb-ft (Nãm).................520 (705)Peak Torque rpm.............................1440Torque Rise (%) (Gov. rpm)......................21Altitude Capability — ft (m)............10 000 (3050)Max hp (kW).............................210 (156)Advertised hp (kW).......................210 (156)Operating Range (rpm)............1440-2500 (1060)Maximum Engine rpm........................2640Governed Speed rpm.........................2500Peak Torque — lb-ft (Nãm).......520 (705)/605 (820)Peak Torque rpm.............................1440Torque Rise (%) (Gov. rpm)...................23/45Altitude Capability — ft (m)............10 000 (3050)  PERFORMANCE DATA    T  o  r  q  u  e   l   b  -   f   t   P  o  w  e  r   b   h  p 1500 1700 1900 2100 2300 2500 Engine Speed rpm 180600540480420660210220 230 hp (172 kW) DM3280 190200    T  o  r  q  u  e   l   b  -   f   t   P  o  w  e  r   b   h  p 1500 1700 1900 2100 2300 2500215800740680620560860275 275/275HT hp (205 kW) DM3283/DM3284 235255 Engine Speed rpmHigh TorqueStd. Torque    T  o  r  q  u  e   l   b  -   f   t   P  o  w  e  r   b   h  p 1500 1700 1900 2100 2300 2500220800740680620860280 300/300HT hp (224 kW) DM3285/DM3286 240260300 Engine Speed rpmHigh TorqueStd. Torque 3126B T RUCK ENGINES – 175-330 hp    T  o  r  q  u  e   l   b  -   f   t   P  o  w  e  r   b   h  p 1500 1700 1900 2100 2300 2500170740660620560500800230250 250/250HT hp (186 kW) DM3281/DM3282 190210 Engine Speed rpmHigh TorqueStd. Torque PERFORMANCE CURVESPERFORMANCE CURVESPERFORMANCE DATA Max hp (kW).............................230 (172)Advertised hp (kW).......................230 (172)Operating Range (rpm).............1440-2400 (960)Maximum Engine rpm........................2640Governed Speed rpm.........................2400Peak Torque — lb-ft (Nãm).................660 (895)Peak Torque rpm.............................1440Torque Rise (%) (Gov. rpm)......................37Altitude Capability — ft (m)............10 000 (3050)Max hp (kW).............................250 (186)Advertised hp (kW).......................250 (186)Operating Range (rpm).............1440-2400 (960)Maximum Engine rpm........................2640Governed Speed rpm.........................2400Peak Torque — lb-ft (Nãm)......660 (895)/800 (1085)Peak Torque rpm.............................1440Torque Rise (%) (Gov. rpm)...................26/52Altitude Capability — ft (m)............10 000 (3050)Max hp (kW).............................275 (205)Advertised hp (kW).......................275 (205)Operating Range (rpm).............1440-2400 (960)Maximum Engine rpm........................2640Governed Speed rpm.........................2400Peak Torque — lb-ft (Nãm).....800 (1085)/860 (1166)Peak Torque rpm.............................1440Torque Rise (%) (Gov. rpm)...................39/49Altitude Capability — ft (m)............10 000 (3050)Max hp (kW).............................300 (224)Advertised hp (kW).......................300 (224)Operating Range (rpm).............1440-2400 (960)Maximum Engine rpm........................2640Governed Speed rpm.........................2400Peak Torque — lb-ft (Nãm).....800 (1085)/860 (1166)Peak Torque rpm.............................1440Torque Rise (%) (Gov. rpm)...................27/37Altitude Capability — ft (m)............10 000 (3050)  3126B T RUCK ENGINES – 175-330 hp 170190150130110907050301100 1300 1500 1700 1900 2100 2300 2500 2700 2900 ENGINE SPEED – rpm    R   E   T   A   R   D   I   N   G   P   O   W   E   R  –   h  p Exhaust Brake Performance Three operational modes can be programmed:Coast, Latch, or Manual PERFORMANCE DATA    T  o  r  q  u  e   l   b  -   f   t   P  o  w  e  r   b   h  p 1500 1700 1900 2100 2300 2500 Engine Speed rpm 230830800770740860290310 330 hp (246 kW)* DM3287 250270330 * For RV and Fire Truck only PERFORMANCE CURVES Max hp (kW).............................330 (246)Advertised hp (kW).......................330 (246)Operating Range (rpm).............1440-2400 (960)Maximum Engine rpm........................2640Governed Speed rpm.........................2400Peak Torque — lb-ft (Nãm)...............860 (1166)Peak Torque rpm.............................1440Torque Rise (%) (Gov. rpm)......................19Altitude Capability — ft (m)............10 000 (3050)
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