Place of Origin:
China
Brand Name:
Cum-mins
Model Number:
QST30
Complete engine assembly for the Cummins QST30 and QST30-C1050, quoted through assembly number 4067896. Published sheets give a cast iron 50 degree V12 of 30.48 L on a 140 mm bore by 165 mm stroke, compression ratio 14 to 1, turbocharged and aftercooled, at 3328 kg. The same 140 mm by 165 mm twelve cylinder size is designated SAA12V140E-3 for Komatsu PC2000-8 and HD785-7 machines, so both brand names appear on one engine and each needs its own qualifier.
| Item | Specification |
|---|---|
| Product Name | Complete Engine Assembly |
| Engine Designation | QST30; QST30-C; QST30-C1050; QST30-G3; QST30-G4; QST30-G5 |
| Assembly Number | 4067896 |
| Component Numbers | 4068673 cylinder head assembly; 3093283 injector; 2881956 and 2843823 and 2837146 HX80 turbocharger |
| Second Designation | SAA12V140E-3; SAA12V140E-3B; SAA12V140E-7; SA12V140-1 |
| Configuration | Cast iron, 50 degree V, twelve cylinder, four cycle |
| Displacement | 30.48 L, 1860 cubic inch |
| Bore and Stroke | 140 mm by 165 mm |
| Compression Ratio | 14 to 1 |
| Aspiration | Turbocharged and aftercooled; twin turbocharged on the C1050 build |
| Published Ratings | 680 kW prime and 750 kW standby on the genset sheets; 783 kW at 2100 rpm on the C1050 build |
| Weight | 3328 kg |
| Applications | Mining haul truck; large excavator; generator set; industrial power unit |
| Condition | New, rebuilt and used assemblies are all traded |
| Packaging | Heavy steel skid, ports capped, moisture barrier, export crate |
| Category | Replaceable Part Numbers & Compatible Models |
|---|---|
| Engine Designation | QST30; QST30-C; QST30-C1050 |
| Genset Builds | QST30-G3; QST30-G4; QST30-G5 |
| Second Designation | SAA12V140E-3; SAA12V140E-3B; SAA12V140E-7; SA12V140-1 |
| Part Numbers | 4067896 assembly; 4068673 cylinder head assembly; 3093283 injector; 2881956; 2843823; 2837146 |
| Compatible Machines | Komatsu PC2000-8, HD785-7 and D475A-5E0; SANY SRT33 and SRT95C; mining haul trucks; generator sets; industrial units |
Published sheets give the QST30 as a 140 mm by 165 mm twelve cylinder of 30.48 L, and published sheets give the SAA12V140E-3 as a 140 mm by 165 mm twelve cylinder for HD785-7 and PC2000-8, and market entries sell the two names as one assembly. Where both names appear, each brand name has to carry its own qualifier rather than sharing one.
Numbers such as 37259049, 37284966 and 37288101 are quoted next to the letters ESN, which marks them as engine serial numbers rather than spare part numbers. One listing places such a number in the headline as if it identified the assembly, so the two kinds of number should be kept apart.
The genset sheets give 680 kW prime and 750 kW standby at 60 Hz, while the machine build is quoted at 783 kW at 2100 rpm, and further listings reach 895 kW or describe a range from 760 to 1500 hp. The duty and the speed belong to the build, so the rating has to be agreed.
Advertised figures fall into one group between about USD 3,100 and 30,000 and a second between about 74,000 and 235,000, and one entry spans 94,366 to 194,366 on its own. Units are quoted per piece, per unit, per ten pieces, per one thousand units and once per acre, so one delivered price per engine has to be obtained.
Titles in this search name QSX15, QST30, QSK50, QSK60-C, QSK78 and QSK95 in one line, and another names QST30, ISX15, QSX15, ISM11, QSM11, KTA19, NTA855 and KTA50-C1600 together. A further title carries the engine code S6K, which belongs to a different maker. The plate, not the title, decides.
Cylinder head assembly 4068673; cylinder head gasket; piston and liner kit; injector 3093283; fuel lift pump; overhaul gasket kit; crankshaft and bearing set; HX80 turbocharger 2881956 and 2843823 and 2837146; oil pump; water pump and thermostat; starter motor and alternator; flywheel housing; engine mounting.
A complete V12 engine assembly for the QST30 and QST30-C1050, quoted as 4067896.
30.48 L, twelve cylinders in a 50 degree V, 140 mm bore by 165 mm stroke, compression ratio 14 to 1, turbocharged and aftercooled, 3328 kg.
Mining haul trucks, large excavators and generator sets.
No, it is a larger engine.
No, each build has its own rating.
The engine data plate, the build code and the machine model and serial.
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