Cummins QSB6.7-C260 Industrial Diesel Engine

The QSB6.7-C260 is Dongfeng Cummins' top-output variant in the QSB6.7 series, delivering 260HP with a 990 N.m torque peak at 1500 RPM — optimised for hydraulic-intensive construction equipment where low-RPM torque density is the primary selection criterion. It is powered by a High Pressure Common Rail fuel system with DCEC proprietary ECM control, and certified to Tier 3 / EU Stage IIIA for international project compliance. Primary applications include excavators, cranes, loaders, bulldozers, drill rigs and road rollers.

Technical Specs

General Data

Power & Performance

Physical Data

Series Comparison

All QSB6.7 variants share the same 6.7L, 107×124mm, 6-cylinder in-line architecture. Selection is determined by required power output and emission tier.

Selection note: The C260 is the only QSB6.7 variant combining HPCR fuel system with Air-Air intercooling at the 2200 RPM rated speed point. If your application requires less than 220HP, the C190 or C220 with Bosch Electronic system may offer a cost advantage. Confirm equipment OEM's approved engine list before substitution.

Replacement Compatibility

The QSB6.7-C260 is a direct replacement candidate for earlier QSB6.7 series engines sharing the same block architecture (107×124mm bore/stroke, 6.7L displacement). Verify compatibility against the following before ordering:

Dimensional check: Engine envelope 1111×716×960mm — confirm chassis clearance and mount point alignment with existing installation.

Interface check: SAE flywheel housing and bell housing ratings must match the driven equipment's transmission or hydraulic pump interface.

Electrical check: Confirm ECM wiring harness connector compatibility; 24V systems require 24V/750A starter, 12V systems require 12V/500A starter.

Emission check: The QSB6.7-C260 is certified Tier 3 / Stage IIIA. Verify the destination country's in-use emission regulations before replacement — Stage IV/V variants exist for markets requiring higher compliance.

CPL verification: Provide your existing engine's ESN (Engine Serial Number) or nameplate CPL code when requesting a quote to confirm exact configuration match.

Parts & Service

Genuine DCEC Cummins parts are stocked and available for the full QSB6.7-C260 service lifecycle. High-consumption parts categories:

· Filters — Fuel filter (three-stage), oil filter, air filter element
· Fuel system — HPCR injectors, fuel pump assembly, fuel pump repair kit
· Turbocharger — Holset wastegate turbo assembly, turbo repair kit
· Overhaul kits — Top-end kit, in-frame kit, complete overhaul kit (by CPL)
· Seals & gaskets — Full gasket sets, crankshaft seal, cylinder head gasket
· Electrical — ECM unit, sensors, wiring harness connectors

Parts orders accepted alongside engine orders or independently. Provide ESN or CPL code for accurate part number confirmation. Technical support available for parts identification and installation guidance.

Procurement & Logistics

Lead time: 15 working days from order confirmation
Port of loading: FOB Shenzhen; other China ports available on request
Trade terms: FOB / CIF / CNF
Transport: Sea freight (standard) or air freight (available)
Packing: Export wooden crate — 1250×910×1050mm, gross weight 600kg
Documentation: Commercial invoice, packing list, bill of lading, certificate of origin; form E (ASEAN), EUR.1 and other preferential certificates arranged on request
Minimum order: Single unit orders accepted; volume pricing available from 3 units

Warranty & After-Sales

· Warranty period: 12 months or 1,500 operating hours, whichever comes first
· Coverage: Manufacturing defects under normal operating conditions; full terms provided at order confirmation
· Claim process: Submit ESN, fault description and operating hours via email or WhatsApp; technical team responds within 24 hours
· On-site support: Available for installation, commissioning and troubleshooting in select regions — confirm availability at inquiry stage
· Training: Operator and maintenance training documentation supplied with each engine; on-site training available on request
· Overhaul support: Full lifecycle technical support from installation through to major overhaul

Wholesale & Distribution

The QSB6.7-C260 is available for wholesale supply to equipment manufacturers, machinery traders, construction contractors and regional distributors. Supply terms are assessed on a case-by-case basis.

· Volume pricing: Tiered pricing from 3 units; contact for current schedule
· OEM supply: Configuration customisation (starting voltage, emission tier, auxiliary systems) available for OEM build programmes
· Supply stability: In-stock inventory maintained; forward-order scheduling available for large-volume programmes
· Export documentation: Full export package including manufacturer certificate, test report and customs clearance support provided as standard
· Authorised supply: Sourced directly through DCEC distribution channels; engine serial numbers verifiable via Cummins QuickServe

FAQ

Q1: What is the difference between QSB6.7-C260 and QSB6.7-C260-30?

The C260-30 is a sub-variant designation used by some DCEC suppliers to indicate a specific configuration batch; core specifications (260HP, 990 N.m, 6.7L) are identical. Confirm the configuration code (D313013CX03) and CPL at order stage.

Q2: Is the QSB6.7-C260 a direct replacement for my existing QSB6.7 engine?

All QSB6.7 variants share the same block architecture, but ECM calibration, fuel system type and emission certification differ by variant. Provide your ESN or CPL code for a confirmed compatibility check before ordering.

Q3: What emission standard does the QSB6.7-C260 meet?

The QSB6.7-C260 is certified to Tier 3 / EU Stage IIIA / China NS III. Stage IV/V variants exist for markets with stricter requirements — confirm destination country regulations before purchase.

Q4: Can this engine start in cold weather without auxiliary equipment?

The QSB6.7-C260 starts unaided at –12 °C; with an auxiliary pre-heating system, reliable cold start is rated to –24 °C.

Q5: What is the fuel system type — HPCR or Bosch electronic?

The C260 uses a High Pressure Common Rail (HPCR) system with DCEC ECM control. Lower-output QSB6.7 variants (C133–C220) use Bosch Electronic systems — these fuel systems are not interchangeable.

Q6: How long does delivery take and what are the payment terms?

Standard lead time is 15 working days FOB Shenzhen. Payment is accepted by T/T or L/C; trade terms FOB, CIF and CNF are all available.

Q7: Are genuine Cummins spare parts available for the QSB6.7-C260?

Yes — genuine DCEC Cummins parts are stocked for the full service lifecycle. Provide your ESN or CPL code to ensure correct part number matching across injectors, turbo, overhaul kits and filters.

Contact & Inquiry

To receive pricing, confirm stock availability or discuss volume supply for the Cummins QSB6.7-C260, provide the following in your inquiry:

· Required quantity
· Destination port / country
· Preferred trade term (FOB / CIF / CNF)
· Existing engine ESN or CPL code (if ordering as replacement)
· Any specific configuration requirements (voltage, emission tier, auxiliary systems)

Response within 24 hours. Parts inquiries accepted alongside engine orders. Contact us!

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