900 / 2440
Edition 47 12-39
12
On-Highway Trucks
Appendix G
●
CX31 Startability Reference Guide
CX31 Startability Reference Guide (for Common GVWR/GCCR and Axle Ratios)
Maximum Startability (% Grade) at given weight for the most common Axle Ratios: 4.56, 4.89, and 5.38
Tire Revs/Mile = 488
60,000 lb GVWR/GCCR 70,000 lb GVWR/GCCR 80,000 lb GVWR/GCCR 90,000 lb GVWR/GCCW
Engine HP/Torque
4.56 4.89 5.38 4.56 4.89 5.38 4.56 4.89 5.38 4.56 4.89 5.38
CT13 365/1250 22.9 24.8 27.5 19.5 21.0 23.3 16.9 18.2 20.2 14.9 16.1 17.7
CT13 370/1350 23.4 25.2 28.0 19.8 21.3 23.6 17.2 18.5 20.5 15.1 16.3 18.0
CT13 390/1450 24.0 25.9 28.8 20.3 21.9 24.3 17.6 19.0 21.0 15.6 16.8 18.5
CT13
410/1450 29.5 31.9 35.5 24.9 26.9 29.9 21.6 23.2 25.8 19.0 20.5 22.6
CT13 430/1550 30.7 33.2 37.0 25.9 27.9 31.1 22.4 24.2 26.8 19.7 21.3 23.5
CT13 475/1700 33.3 36.0 40.3 28.0 30.3 33.7 24.2 26.1 29.0 21.3 23.0 25.4
If your Truck is outside the weight or axle ratios specified above, please contact the Truck Coordinator at your Cat dealer for assistance. Other options are available.