The Case IH STX530QT Quadtrac tractor engine horsepower is 535 hp | 398.9 kW, PTO horsepower is 473 hp | 352.7 kW, and the drawbar horsepower is 406.28 hp | 303.0 kW.
Engine HP535 hp | 398.9 kW
PTO HP473 hp | 352.7 kW
Drawbar HP406.28 hp | 303.0 kW
PTO Transfer88.4%
Displacement912 ci | 14.9 L
Case IH STX530QT Quadtrac Horsepower Specs
Engine horsepower
535 hp | 398.9 kW
PTO horsepower claimed
473 hp | 352.7 kW
PTO horsepower tested
534.72 hp | 398.7 kW
Drawbar horsepower tested
406.28 hp | 303.0 kW
Case IH STX530QT Quadtrac Useful Horsepower Calculations
PTO-to-engine power transfer
88.4% of engine hp reaches the PTO
Drawbar-to-engine power transfer
75.9% of engine hp reaches the drawbar
Drawbar-to-PTO power ratio
85.9% drawbar hp vs PTO hp
Engine size per PTO horsepower
1.9 ci per PTO hp
PTO horsepower per liter
31.7 PTO hp per L
Engine size per engine horsepower
1.7 ci per engine hp
Engine horsepower per liter
35.9 engine hp per L
Rated speed per PTO horsepower
4.4 rpm per PTO hp
Case IH STX530QT Quadtrac Engine Specs
Engine type
turbocharged diesel
Displacement
912 ci | 14.9 L
Bore and stroke
5.394×6.654 inches | 137 x 169 mm
Compression
17:1
Rated RPM
2100
Case IH STX530QT Quadtrac Fuel, Cooling, Starting & Service Specs
Starter volts
24
Battery volts
12
Case IH STX530QT Quadtrac Horsepower Comparison Charts
Engine horsepower comparison
This model
535 hp
Average
210 hp
Low
120 hp
High
380 hp
PTO horsepower comparison
This model
473 hp
Average
175 hp
Low
100 hp
High
320 hp
Drawbar horsepower comparison
This model
406.3 hp
Average
150 hp
Low
85 hp
High
280 hp
Displacement comparison
This model
912 ci
Average
520 ci
Low
360 ci
High
750 ci
Rated RPM comparison
This model
2,100 rpm
Average
2,100 rpm
Low
1,600 rpm
High
2,500 rpm
Engine size per PTO HP
This model
1.9 ci/hp
Average
3.3 ci/hp
Low
2 ci/hp
High
5.2 ci/hp
Benchmarks use practical low, average and high ranges for the large ag tractor category. Use the operator manual and actual engine/tractor configuration before sizing implements or judging working power.
Case IH STX530QT Quadtrac Horsepower FAQ
How much horsepower does the Case IH STX530QT Quadtrac have?
The listed engine output is 535 hp, above the 210 hp benchmark average. That is a higher-power result, so ballast, tire setup and implement width matter if you want to use the full 535 hp.
How much PTO horsepower does the Case IH STX530QT Quadtrac have?
The listed PTO output is 473 hp, above the 175 hp benchmark average. That is the number to use for mowers, balers, augers, pumps and other PTO tools that need up to about 473 hp.
How much drawbar horsepower does the Case IH STX530QT Quadtrac have?
The listed drawbar output is 406.3 hp, above the 150 hp benchmark average. That makes the 406.3 hp drawbar number more useful than engine hp for tillage and heavy pulling.
How much engine power reaches the PTO on the Case IH STX530QT Quadtrac?
The PTO-to-engine transfer works out to 88.4%, from 535 engine hp to 473 PTO hp. That is a normal usable range for judging PTO implement fit.
How efficient is the Case IH STX530QT Quadtrac for pulling work?
The drawbar-to-engine transfer is about 75.9%, from 535 engine hp to 406.3 drawbar hp. That gives a more grounded pulling estimate than engine horsepower alone.
Is the Case IH STX530QT Quadtrac better judged by PTO hp or drawbar hp?
The drawbar output is about 85.9% of PTO output, comparing 406.3 drawbar hp with 473 PTO hp. That helps separate pulling ability from PTO implement ability.
How big is the Case IH STX530QT Quadtrac engine?
The engine displacement is 912 ci, above the 520 ci benchmark average. Bigger displacement can help low-rpm pull and load-holding feel.
Is the Case IH STX530QT Quadtrac engine stressed for its PTO horsepower?
The engine has about 1.9 cubic inches per PTO hp, using 912 ci and 473 PTO hp. That is a smaller-displacement, higher-output style result.
How much PTO horsepower per liter does the Case IH STX530QT Quadtrac make?
The output density is about 31.7 PTO hp per liter, using 473 PTO hp and 14.9 L of displacement. Higher hp/L means more output squeezed from each liter; lower hp/L usually means a more relaxed engine tune.
Official information note
Horsepower and engine specs can vary by year, market, engine option, fuel system, test standard and tractor configuration. Check the operator manual, spec plate, parts book and official caseih.com website before buying parts, sizing implements or making repair decisions.
