The Perkins 4008-30TAG2 is a 30.561-litre, eight-cylinder diesel engine for 1500 rpm / 50 Hz generator sets operating in the 1 MVA power class. Its published ratings are 1010 kVA prime and 1125 kVA standby, corresponding to 808 kWe and 900 kWe at a stated power factor of 0.8.
This model belongs to the heavy-duty Perkins generator-drive engine range and uses turbocharging, air-to-air charge cooling, individual four-valve cylinder heads and unit fuel injectors. Correct selection depends on more than the advertised genset kVA: the exact Build List, ESN, package scope, alternator, cooling system and 50 Hz operating requirement must all be confirmed.
Define the Engine Before Comparing the kVA
The designation 4008-30TAG2 identifies a specific 30-litre engine generation. It should not be confused with the earlier 4008TAG2 or 4008TAG2A product line, which uses different ratings, Build Lists and parts references.
| Identification Point | 4008-30TAG2 Position |
|---|---|
| Engine Family | Perkins 4008-30TAG |
| Primary Build List | DGBH8673S |
| Updated Build List | DGB8673S |
| ESN Prefix | DGBH |
| Rated Speed | 1500 rpm |
| Generator Frequency | 50 Hz |
| Prime Output | 1010 kVA / 808 kWe |
| Standby Output | 1125 kVA / 900 kWe |
The DGBH prefix is particularly important because the adjacent 4008-30TAG3 family uses DGDH identification. A quotation or parts order based only on “Perkins 4008” creates a material risk of selecting components from the wrong engine generation.
1010 kVA Prime and 1125 kVA Standby
The engine has two published operating ratings at 1500 rpm. Prime and standby are duty classifications, not two interchangeable marketing labels.
| Duty | Gross Engine Power | Net Engine Power | Generator Output | Electrical Output |
|---|---|---|---|---|
| Prime | 901 kW (1208 hp) | 851 kW (1141 hp) | 1010 kVA | 808 kWe |
| Standby | 997 kW (1337 hp) | 947 kW (1270 hp) | 1125 kVA | 900 kWe |
Prime and Standby Describe Different Use Patterns
The prime rating applies to the approved prime or variable-load operating profile of the complete generator set. The standby rating is the higher emergency-power level and remains subject to the operating-hour and loading limits of the applicable standby classification.
A manufacturing plant, hospital or data centre that expects frequent generator operation should not size the project solely from the 1125 kVA standby figure. The annual operating hours, load variation, redundancy plan and largest load steps should be defined before the genset is selected.
Why Genset Suppliers May Advertise Different kVA Values
Generator-set manufacturers may advertise 1000 kVA, 1010 kVA, 1100 kVA or another nearby output for packages using the same base engine. This does not necessarily mean that the engine rating has changed.
| Reason for a Different Advertised Rating | What Should Be Checked |
|---|---|
| Alternator Selection | Alternator frame, efficiency, winding, temperature rise and excitation system |
| Power Factor | Whether the published kVA assumes 0.8 or another project value |
| Ambient Derating | Temperature, altitude, ventilation and enclosure airflow |
| Genset Manufacturer Margin | Whether the package is deliberately released below the maximum engine rating |
| Regional Rating Method | The duty definition and standard used on the genset data sheet |
| Accessory Loads | Fan, pumps and other parasitic loads included in the net package output |
When sourcing a replacement engine, the genset’s advertised kVA should not replace the engine nameplate. The Build List and complete ESN provide the more reliable basis for identifying the original engine specification.
A Dedicated 1500 rpm / 50 Hz Platform
The supplied product data identifies the 4008-30TAG2 as a 1500 rpm engine. No approved 1800 rpm output is provided, and the source explicitly states that this model is not offered as a 60 Hz version.
A project requiring 1800 rpm / 60 Hz should therefore use a separately approved engine configuration. The governed speed should not be changed in the field in an attempt to convert this engine to another frequency.
| Frequency Decision | Requirement |
|---|---|
| 50 Hz Project | Review the 1500 rpm DGBH8673S / DGB8673S configuration |
| 60 Hz Project | Select a separately documented 1800 rpm engine platform |
| Existing Engine Replacement | Confirm the original rated speed from the nameplate and genset documentation |
| Frequency Conversion | Do not approve from the model name or kVA rating alone |
Engine-Only, Electro Unit and ElectropaK Are Not the Same Scope
The supplied content refers to engine-only supply while the technical specification lists Electro unit / ElectropaK configurations. These descriptions should be treated as different commercial package scopes rather than assumed to contain identical equipment.
| Package Description | Quotation Check |
|---|---|
| Engine-Only | Confirm exactly which cooling, filtration, electrical and mounting components are excluded |
| Electro Unit | Confirm the included engine accessories and obtain the applicable dimensional drawing |
| ElectropaK | Confirm radiator, filtration, controls, mounts and other included package equipment |
| Customer-Specific Genset Package | Confirm alternator, base frame, controller, enclosure, breaker and fuel-system scope |
The published dimensions and dry weight on this page apply specifically to the ElectropaK configuration. They should not be presented as confirmed Electro unit dimensions because the source states that the Electro unit dimensional data remains pending.
Mechanical Scale Above the 1 MVA Threshold
The ElectropaK package has a stated dry weight of 4217 kg. At this scale, lifting, foundation loading, access routes, radiator airflow and service clearances become primary project decisions rather than secondary installation details.
| Mechanical Parameter | Specification |
|---|---|
| Configuration | Electro unit / ElectropaK |
| Cylinder Arrangement | 8 vertical cylinders in line |
| Displacement | 30.561 L (1856 in³) |
| Bore × Stroke | 160 × 190 mm (6.3 × 7.5 in) |
| Aspiration | Turbocharged, air-to-air charge cooled |
| Combustion System | Direct injection |
| Compression Ratio | 12.8:1 |
| Rotation Viewed from Flywheel | Anti-clockwise |
| Cooling System | Water cooled |
| Total Lubricating Oil Capacity | 153 L (40.4 US gal) |
| Total Coolant Capacity | 140 L (37 US gal) |
| ElectropaK Dimensions (H × L × W) | 1920 × 3468 × 2194 mm (76 × 137 × 86 in) |
| ElectropaK Dry Weight | 4217 kg (9297 lb) |
Installation Information Required Before Release
- Foundation dimensions and permitted static loading
- Engine-room door, roof or crane access
- Lifting method and lifting-equipment capacity
- Radiator airflow and hot-air discharge route
- Combustion-air supply and enclosure pressure restriction
- Exhaust routing and permissible back pressure
- Fuel-tank position and fuel-line routing
- Maintenance clearance around filters, heads, manifolds and pumps
Individual Four-Valve Cylinder Heads
Each cylinder uses an individually mounted four-valve cylinder head. The design supports gas flow and allows cylinder-level head work without treating the complete eight-cylinder engine as one cylinder-head assembly.
The wider Perkins 4000 Series uses common design principles across several cylinder counts, but this does not mean that components can be exchanged freely between 4006, 4008, 4012 and 4016 engines. Part-level compatibility must be confirmed from the exact engine record.
Unit Fuel Injectors and Build-Specific Parts
Unit fuel injectors are used to control fuel atomisation and combustion. The injector listed for the DGBH8673S family is 858/35. This reference should not be transferred to another 4008 model or an earlier 4008TAG product solely because the engines have similar descriptions.
Fuel-system parts, pistons, valves, manifolds and filters should be released only after the Build List and complete ESN have been verified.
Build Lists DGBH8673S and DGB8673S
DGBH8673S is identified as the original Perkins Build List designation assigned in 2008. DGB8673S is the updated shortened designation used for engines from later production batches.
| Build List | Identification |
|---|---|
| DGBH8673S | Original Perkins designation assigned in 2008 |
| DGB8673S | Updated designation used for later production batches |
The supplied information treats both designations as the same stated engine specification with identical parts compatibility. The complete ESN remains necessary because it identifies the production record and individual component revisions of the engine being supplied or serviced.
How to Confirm the Engine Identity
- Record the complete model: 4008-30TAG2
- Confirm that the ESN or Build List begins with DGBH or DGB
- Record the complete serial number rather than only the prefix
- Confirm the rated speed as 1500 rpm
- Provide the original genset manufacturer and model
- Photograph the full engine nameplate
Do Not Confuse TAG2 with TAG3
The Perkins 4008-30TAG3 occupies the next output tier in the same 30-litre family. It uses the DGDH Build List prefix rather than DGBH.
| Model | Build List Prefix | 1500 rpm Prime | 1500 rpm Standby |
|---|---|---|---|
| 4008-30TAG2 | DGBH | 1010 kVA | 1125 kVA |
| 4008-30TAG3 | DGDH | 1125 kVA | 1250 kVA |
TAG3 should not be proposed as a direct power upgrade without reviewing the alternator, radiator, base frame, exhaust, control system, coupling and permissible load profile. Similar engine architecture does not establish drop-in compatibility.
Application Review for 1 MVA-Class Generator Sets
The 4008-30TAG2 may be evaluated for manufacturing facilities, hospitals, data centres and other large prime or standby power projects. The application should be assessed through the actual load profile rather than the connected-load total alone.
| Application | Key Information to Confirm |
|---|---|
| Manufacturing Facility | Motor starting, compressor demand, production sequencing and allowable process interruption |
| Hospital Backup | Transfer sequence, life-safety loads, medical equipment, HVAC demand and redundancy |
| Data Centre | UPS interaction, cooling load, staged transfer, redundancy architecture and frequency limits |
| Large Commercial Building | Lift motors, pumps, fire systems, ventilation and priority-load distribution |
| Parallel Generator Plant | Synchronization, protection, controller compatibility and load-sharing strategy |
Fuel Consumption Across the Load Range
The supplied specific-fuel-consumption figures are stated for Prime/DCP operation. The values remain approximately 202 g/kWh at the 110%, 100% and 75% load points, increasing to approximately 205 g/kWh at 50% load.
| Prime/DCP Load Point | Approximate Specific Fuel Consumption |
|---|---|
| 110% Load | 202 g/kWh |
| 100% Load | 202 g/kWh |
| 75% Load | 202 g/kWh |
| 50% Load | 205 g/kWh |
These values are specific-consumption references, not litres-per-hour guarantees. Actual site fuel use depends on delivered electrical load, fuel properties, alternator efficiency, ambient conditions and engine condition.
Maintenance Baseline
The supplied information states a 500-hour service interval for oil and fuel service. The applicable Operation and Maintenance Manual should still be used to confirm the exact tasks, fluid specifications and interval adjustments for the individual Build List and operating conditions.
| Maintenance Item | Planning Requirement |
|---|---|
| Stated Service Interval | 500 operating hours |
| Lubricating-Oil Capacity | 153 L (40.4 US gal) |
| Coolant Capacity | 140 L (37 US gal) |
| Oil Specification | Confirm from the Perkins manual for DGBH8673S / DGB8673S |
| Fuel-Service Scope | Confirm filters, water separation and site fuel-quality requirements |
| Severe Conditions | Review dust, temperature, fuel quality and prolonged low-load operation |
Exhaust Aftertreatment and Emissions Documentation
The technical specification lists exhaust aftertreatment as N/A. This indicates that no aftertreatment system is stated in the supplied configuration; it should not be interpreted as confirmation that the engine is acceptable in every emissions-regulated market.
Destination emissions requirements and supporting documents should be checked before quotation, customs clearance or project approval.
Original Perkins Replacement Parts
The following references are listed as original Perkins components for the DGB/DGBH8673S Build List family. Additional Perkins engine parts can be reviewed by component category, but final release should be based on the complete ESN.
| Item | Part Name | Part Number |
|---|---|---|
| 1 | Valve Kit | T401928 |
| 2 | Small End Bush | SE91B/7, Y01/00023 |
| 3 | Valve Guide | T401899 |
| 4 | Valve Spring | 365/472 |
| 5 | Valve Collet | HW7B/18 |
| 6 | Fuel Filter | SE429B/4 or 4759205 |
| 7 | Exhaust Manifold | T401964, T401965, T401966, T401967, T401968 |
| 8 | Air Filter Assembly | SE551L |
| 9 | Connecting Rod Assembly | SE91T |
| 10 | Big End Bearing Kit | SE91AA/3M |
| 11 | Piston and Ring Kit | SE901BA |
| 12 | Piston Ring Kit | 359/552 |
| 13 | Starter Motor | 701/133 |
| 14 | Alternator Belt | 541/398 |
| 15 | Injector | 858/35 |
| 16 | Oil Pump | SE116AE |
| 17 | Oil Filter | 4324909 |
| 18 | Water Pump | SE145BK |
Several component groups contain multiple part numbers or manifold sections. Do not select a part by appearance, dimensions or the generic “4008” model description. Confirm DGBH8673S / DGB8673S and the complete ESN before releasing the final reference and quantity.
Procurement and Export Release
Availability should be confirmed at the inquiry stage. The stated lead time is typically 3–4 weeks, and quotations are provided within 24 hours after the configuration, quantity and delivery terms have been defined.
| Procurement Item | Supply Information |
|---|---|
| Supply Source | Genuine Perkins through a first-tier authorised distributor channel |
| Quotation Basis | Build List, ESN, package scope, quantity and delivery terms |
| Quotation Time | Within 24 hours after receiving complete inquiry information |
| Typical Lead Time | 3–4 weeks, subject to availability confirmation |
| Pre-Shipment Verification | ESN and engine nameplate checked before dispatch |
| Engine Test Report | Available on request |
| Export Documents | Commercial invoice, packing list, bill of lading and certificate of origin |
| Shipping | FCL or LCL from Shenzhen, Guangzhou or Shanghai |
| Packaging | Crating and export packaging included |
| Export Experience | Supplied to more than 30 countries |
Warranty and Technical Claim Review
The stated warranty period is 12 months or the manufacturer-specified operating hours from the commissioning date, whichever occurs first.
Conditions Outside Warranty Coverage
- Incorrect installation or improper commissioning
- Failure to follow the applicable Perkins Operation and Maintenance Manual
- Normal consumption of filters, belts, coolant and lubricants
- Damage caused by contaminated fuel or an incorrect lubricant specification
- Cooling-system neglect
- Unauthorised modifications or repairs during the warranty period
- Transit damage not reported within three working days of delivery
Information Required for Technical Review
- Complete Build List and ESN
- Current operating hours
- Fault description and operating conditions
- Available fault codes
- Photographs of the affected area
- Relevant commissioning and maintenance records
The stated engineering-review time is within two business days after the required evidence has been received. Depending on the assessment, the response may include replacement parts, coordinated repair support or an engine exchange.
Transit Damage Procedure
Inspect the shipment before signing the delivery receipt. Photograph visible damage before unpacking, record it on the receipt and notify the supplier within three working days. Do not commission a visibly damaged engine before the transport-damage report has been reviewed.
Perkins 4008-30TAG2 FAQ
Is the 4008-30TAG2 the same as the 4008TAG2 or 4008TAG2A?
No. The 4008-30TAG2 uses the DGBH Build List family and belongs to a different engine generation. Earlier 4008TAG2 and 4008TAG2A engines have different rating and parts structures.
How can the exact engine be identified?
Confirm model 4008-30TAG2, Build List DGBH8673S or DGB8673S and the complete ESN. A clear photograph of the full nameplate is recommended.
Is an 1800 rpm / 60 Hz version available?
The supplied information identifies this model only at 1500 rpm / 50 Hz and states that no 1800 rpm version is available.
Why can two genset suppliers quote different kVA for this engine?
The engine ratings remain fixed, but the final genset label can vary with alternator efficiency, derating, power factor, enclosure cooling and the package manufacturer’s release margin.
What is the difference between TAG2 and TAG3?
TAG2 uses the DGBH prefix and is rated at 1010/1125 kVA. TAG3 uses the DGDH prefix and is listed at 1125/1250 kVA. They should not be treated as interchangeable without an integration review.
Which published dimensions apply?
The stated dimensions of 1920 × 3468 × 2194 mm and dry weight of 4217 kg apply to the ElectropaK configuration. Electro unit dimensions are not confirmed in the supplied source.
What is the stated service interval?
The supplied page states a 500-hour service interval. The applicable Perkins manual should be used to confirm the exact oil, fuel and inspection tasks.
What information is required for an engine or parts quotation?
Provide the complete model, Build List, ESN, package scope, required duty, original genset details, quantity, destination and required documents.
Request a 4008-30TAG2 Configuration Review
Submit the following through the engine inquiry and quotation page:
- Build List DGBH8673S or DGB8673S
- Complete ESN or a clear nameplate photograph
- Required prime or standby duty
- Confirmation of 1500 rpm / 50 Hz operation
- Engine-only, Electro unit or ElectropaK package requirement
- Required alternator output, voltage and power factor
- Maximum site temperature and altitude
- Original generator-set manufacturer and model for a replacement project
- Quantity, delivery terms and destination port
- Required emissions, export and test documentation
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