Engine power packs
Engine power packs for your genset line
Sinospect supplies diesel engine power packs — engine, cooling group and complete governing, without the alternator — to genset assemblers and integrators. Batches are sourced through qualified Cummins-licensed and equivalent OEM channels in China, witnessed on the load stand before dispatch, and documented for the line they feed.
A rating list with duty basis and preferred engine classes is enough to start. Reference models are welcome but not required. Prefer a form? Download the engine-list template (XLSX).
Included in every power pack
Engine · radiator and cooling group · fan and guard · air cleaner · industrial silencer with flexible connection · starter motor and charging alternator · complete governing package · filters · mounting feet · documents.
Not included — your scope
Main alternator · genset controller · base fuel tank · canopy. System voltage, interface dimensions and any deviation are stated per line in the offer — nobody should have to infer what “power pack” means.
Assembly-line context
The engine is the long-lead item and the warranty item
A genset assembler lives and dies by its engine supply. The ratings are standard; the risk is everything around them — a reference model quietly superseded, a licensed line and a lookalike quoted as if they were the same thing, a flywheel housing that does not match the alternators already on the shelf, or a batch that ships with no independent test between the factory and the container.
Sinospect controls that work from inside China: the buying basis fixed per line, licensed and OEM channels compared in writing, every engine witnessed on the load stand before dispatch, and the document pack assembled against the order. The alternator, controller and canopy stay your scope — the engine arrives ready to couple, with its records.
Sinospect scope
Between your engine list and a tested batch
Sinospect does not replace your design office or your assembly line. The role is to control the factory-side work that creates configuration drift, untested dispatches and documentation gaps.
- 01
Input
Engine list received
Ratings in kVA at stated power factor, prime or standby basis, speed and frequency, governing type and reference models become the controlled buying basis for the batch.
- 02
Award gate
Channel qualified
Cummins-licensed production and equivalent OEM lines are compared in writing for each rating, with build source, warranty route and price band stated per line.
- 03
Factory gate
Witnessed load test
Every engine runs on the load stand before dispatch, witnessed against the agreed duty, with the serial number on the signed test record.
- 04
File gate
Documents closed
Test records, performance data for the offered configuration, conformity and origin evidence and the packing set are checked before release.
- 05
Delivery gate
Dispatch controlled
Packing and shipment are followed to the agreed point, with the SAE interface, spares basis and warranty responsibilities already in writing.
Start with the engine list you already have.
Ratings, duty basis and preferred engine classes are enough for an initial route. We will identify what must be fixed before channel comparison and what evidence should control factory release.
- Minimum input
- Ratings in kVA, prime or standby basis, governing type
- First response
- Channel routes, two-configuration basis and proposed test plan
- No call required
- The initial review can be completed in writing
Power classes
From 50 kVA nodes to large prime power
Ratings quoted at the declared duty basis, 1500 rpm / 50 Hz or 1800 rpm / 60 Hz, with the exact engine model and factory configuration stated per line in the offer.
50–100 kVA prime class
Four-cylinder families in the 3.9 and 4.5 litre classes, for compact single- and three-phase sets — the volume end of an assembly line.
- Mechanical or electronic governing specified per line, never assumed
- Radiator and cooling group matched to the enclosure the set will wear
- Typical class mappings confirmed per RFQ, with exact model and configuration stated in the offer
150–250 kVA prime class
Six-cylinder families in the 5.9 to 9.5 litre classes — the workhorse ratings of industrial and rental fleets.
- Reference-model and current-model options priced separately for the same prime output
- Electronic governor package itemised: actuator, speed pickup, controller, harness
- SAE housing and flywheel options listed per model before production release
250–400 kVA prime class
Heavy six-cylinder and 14-litre-class platforms for prime-rated industrial sets, where configuration selection decides deliverability.
- Exact factory configuration selected against the stated prime duty
- Performance data for the offered configuration included with the offer
- Witnessed load test at the works before any unit ships
400 kVA and above
K-series-class platforms for large prime and standby nodes, quoted with the same two-configuration logic and the same release discipline.
- Availability and build source confirmed in writing before commitment
- Load-test basis agreed against the destination duty
- Delivery schedule fixed per unit, not per catalogue
What a power pack includes
The supply scope is fixed so every offer compares like for like — an engine ready to couple to your alternator, not a bare block and a parts list.
- Identical scope on every offer line, so quotations compare like for like across channels and configurations
- The full included/excluded list is fixed and printed with every offer — no scope surprises between quotation and container
- System voltage, interface dimensions and any deviation stated per line in the offer
Reference to current model
Where the classic references stand today
Assemblers hold their lists in classic references; the works build the current generations. This is the indicative map between the two — the offer then fixes model, configuration and rating per line.
| Buyer's reference | Current factory model | Channel | Typical genset class* |
|---|---|---|---|
| 4BT3.9-G1 / G2 | 4BTA3.9-G2 / G11 | DCEC | 30–50 kVA |
| 6BT5.9-G1 / G2 | 6BTA5.9-G2 | DCEC | 75–100 kVA |
| 6BTA5.9-G2 | 6BTAA5.9-G12 | DCEC | 100–125 kVA |
| 6CTA8.3-G2 | 6CTAA8.3-G7 | DCEC | 125–165 kVA |
| 6LTAA8.9-G2 | 6LTAA8.9-G3 / 6LTAA9.5-G3 | DCEC | 200–250 kVA |
| NT855-GA / NTA855-G1A | NTA855-G4 | CCEC | 250–313 kVA |
| KTA19-G2 / G3 | KTA19-G4 | CCEC | 400–500 kVA |
| KTA38-G2 | KTA38-G5 | CCEC | 630–880 kVA |
* Indicative mapping at 1500 rpm / 50 Hz, prime basis at 0.8 power factor — the reference classes assemblers most commonly hold; 60 Hz equivalents are quoted on request. The exact model, factory configuration and rating are stated per line in the offer, never assumed from this table. Chinese OEM-equivalent lines exist for most of these classes and are quoted as the second channel where they qualify; a reference no longer in production is quoted against its nearest current build, with the differences declared.
Two configurations per rating
Your reference class, and the model sized to the rating
Engine families outlive their catalogues. A line built around a reference class should not discover at order time that the class has moved on — and a buyer holding an old reference should not overpay for nostalgia. Every rating is therefore quoted twice.
Configuration A — your reference class
Priced on the engine class your line is built around, so existing tooling, wiring looms and canopy designs carry over without rework.
Configuration B — sized to the rating
Priced on the factory-recommended current model for the same prime output, which is often the younger platform at a better price band.
Mixable line by line
The two configurations are quoted side by side for every rating and can be mixed across the batch, so reserve margin is decided against real numbers.
Source channel, named on every line
Each quoted line carries one controlled label — DCEC (Cummins joint-venture licensed production), CCEC (Cummins joint-venture production), or Chinese OEM equivalent— together with the warranty route that goes with that channel. Never an undefined “genuine Cummins China”.
Witnessed testing
No engine ships on a factory's word alone
Every engine in a batch runs a witnessed load test at the works before dispatch. The test basis is agreed in the order; instruments carry current calibration evidence; each recorded value is photographed as it is taken; and the serial number goes on the signed record. Deviations are corrected or carried as explicit release conditions — never discovered at incoming inspection on your side.
This is the same acceptance discipline Sinospect applies across witnessed factory acceptance testing — record sheets with no blank boxes, calibrated instruments, and a file the owner can examine years later.
See the artifact
A sample load-test record — the document every serial number ships with. Parameters are illustrative; the format is the one your batch receives.
Before you order
The six questions engine buyers actually ask
Duty basis, channel, interfaces, governing, testing and documents. Each needs a written answer before the deposit rather than after the container opens.
Prime or standby — on what basis are the ratings quoted?
Ratings are fixed in writing before quotation: kVA at the stated power factor, prime or standby duty, speed and frequency. Every line of the offer carries the same declared basis, so comparisons across suppliers and configurations stay honest.
Licensed production or OEM-equivalent — what is the difference?
Both channels are quoted where available, with the build source and warranty route stated per line and a meaningfully different price band between them. The choice is yours per rating; the offer keeps the two clearly separated rather than blending them.
Will the engines match my alternators?
SAE housing and flywheel options are listed per model in the offer. Your alternator interface dimensions are confirmed against the chosen configuration before production release, so the coupling question is closed on paper before it can become a workshop discovery.
Mechanical or electronic governing?
Governing is specified per line. Where electronic governing is required, the package is itemised — actuator, magnetic speed pickup, controller, wiring harness — and confirmed as approved for the offered configuration rather than assumed.
How is testing actually done?
Every engine runs a witnessed load test at the works before dispatch. The serial number goes on the signed test record, instruments carry current calibration evidence, and each recorded value is photographed as it is taken. The batch ships with its records, not ahead of them.
What documents come with a batch?
Signed test records, performance data for the offered configuration, conformity and origin evidence, and a packing set prepared for the destination. Documentation is assembled against the order, not compiled from whatever the factory issues by default.
Documentation discipline
Every batch ships with its records
An engine that is built and tested can still arrive as a stranger — no test record, no configuration data, no origin evidence. The document pack is assembled against the order before dispatch, not reconstructed afterwards by email.
Test records and performance data
Witnessed load-test records signed per serial number, with performance data for the offered configuration checked against the ordered basis.
Conformity and origin evidence
Certificates, declarations and origin documents assembled against the destination market's requirements for engines shipped as components.
Customs and shipping pack
Invoice, packing list and transport documents prepared so the batch clears and lands on your assembly schedule.
The batch dossier, item by item
Standard with every batch: order-to-serial cross-reference · nameplate photos per engine · signed load-test record per serial · instrument and calibration reference · model and configuration sheet · packing photos and packing list. By order or destination market: origin and export documents · conformity evidence · channel and warranty documents. Which items apply is stated in the offer, not discovered at dispatch.
Warranty and after-sales responsibilities
Warranty holder, spare-parts route and claim path are settled in writing per batch, because an engine warranty that cannot be executed across a border is a discount, not a warranty.
The mechanics are fixed before dispatch, not negotiated after a failure. Warranty term and coverage are stated per line, with the channel that backs them. A claim runs against the engine's own file — serial number, signed load-test record and nameplate photo identify the unit — with the evidence expected from your side (photographs, hour reading, the part held for inspection) listed in the batch documents. Where Sinospect is the contracting supplier, the claim comes to Sinospect and is pursued with the works; buyer-direct engagements name the works route and contact instead.
Client profile
Who buys engines this way
Buyers whose product is built on the engine — and who therefore need the engine controlled at its source rather than inspected at arrival.
Genset assemblers
Assembly lines buying engines in repeat batches, where a wrong configuration or a late container stalls the line rather than a single project.
Rental fleets and rebuilders
Operators repowering existing sets or standardising a mixed fleet, who need exact interface data and a test record per serial number.
Panel builders and integrators
Electrical integrators extending into genset assembly, who need a supply basis, documentation and interface discipline they can build a product on.
Operating position
Sinospect's role in an engine batch
- Operating offices in Hong Kong and Ningbo for factory follow-up and document coordination.
- Channel qualification across Cummins-licensed production and equivalent OEM lines, compared in writing per rating.
- Witnessed load testing with calibrated instruments and a signed record per serial number before dispatch.
- Delivery coordination from the works to the agreed point, with packing and marking checked before the container closes.
- Documentation issued in the language your line and your market require, structured for customs and owner examination.
- Supply against the buyer's engine list, not a single factory catalogue. Where Sinospect is the contracting supplier, any payment-linked factory release follows the acceptance criteria agreed in the order; buyer-direct engagements leave commercial release with the buyer.
Buying complete generating sets instead of engines? The wider power-equipment scope lives on the energy sector page, covering sets, transfer switching and distribution equipment.
Send your engine list
Initial review covering channel routes for each rating, the two-configuration basis, interface data to collect, and the witnessed test plan for the batch.
Or start from the engine-list template (XLSX).