The 4012-46TAG0A is a 12-cylinder, 45.8-litre diesel engine from the Perkins 4000 Series, engineered primarily for the standby power generation sector. It is supplied as an ElectropaK, turbocharged and air-to-air chargecooled, and is offered exclusively in a 1500rpm configuration for prime and standby generator set applications. Individual 4-valve cylinder heads and unit fuel injectors improve combustion control and productivity, while shared components across the 4000 Series family support lower parts stocking and simplified long-term maintenance.
4012-46TAG0A Engine Technical Specifications
| Parameter | Value |
|---|---|
| Model | 4012-46TAG0A |
| Configuration | Electro unit / ElectropaK |
| Cylinders | 12, 60° vee |
| Displacement | 45.842 litres (2979 in³) |
| Aspiration | Turbocharged, air-to-air charge cooled |
| Bore × Stroke | 160 × 190 mm (6.3 × 7.5 in) |
| Combustion System | Direct injection |
| Compression Ratio | 12.8:1 |
| Exhaust Aftertreatment | N/A |
| Rotation (viewed from flywheel) | Anti-clockwise |
| Control System | Electronic governor and actuator control (no engine-mounted ECM) |
| Total Lubricating Oil Capacity | 157.5 litres (41.6 US gal) |
| Cooling System | Water cooled |
| Total Coolant Capacity | 223 litres (58.9 US gal) |
4012-46TAG0A Engine Power Output
| Speed | Rating | Engine Power (Gross) | Engine Power (Net) | Generator Output (kVA) | Generator Output (kWe) |
|---|---|---|---|---|---|
| 1500 rpm | Prime | 1125 kW (1509 hp) | 1053 kW (1412 hp) | 1250 | 1000 |
| 1500 rpm | Standby | 1230 kW (1649 hp) | 1158 kW (1552 hp) | 1375 | 1100 |
Build List & Different Versions
4012-46TAG0A Build List
| Build List | Notes |
|---|---|
| DGLM6235S / DGLM0106S / DGLM1571S | Original designation assigned by Perkins (2008) |
| DGL6235S / DGL0106S / DGL1571S | Updated designation for engines produced in later batches |
Both Build Lists refer to the same engine specification. The difference is production batch only — parts compatibility is identical across both designations.
4012-46TAG0A Engine - Different Versions
| Model | Build List | 1500 rpm (50 Hz) | 1800 rpm (60 Hz) | Prime / Standby (kVA) | Prime / Standby (kVA) |
|---|---|---|---|---|---|
| 4012-46TAG0A(E/U) (1500rpm) (India) | DGLM6235S / DGLM0106S / DGLM1571S | ✓ | 1250 / 1375 |
ZEB Power currently offers complete engines and parts for this model in the G0 power range.
Build List Identification Guide
The Build List and ESN (Engine Serial Number) together confirm the exact configuration of a given unit, including cooling package (Tropical/Temperate), governor/actuator configuration, and factory-fitted equipment. It is stamped on the engine nameplate, mounted on the rocker cover or timing case. Locate the dataplate and read the alphanumeric string beginning with DGL or DGLM.
Nameplate fields to record before ordering:
· Build List (e.g. DGLM6235S or DGL6235S)
· Engine Serial Number (ESN)
· Rated speed (1500rpm)
Provide both the Build List and ESN when requesting a quote. This allows us to confirm exact specification match before order commitment.
4012-46TAG0A Common Replacement Parts
| Item | Part Name | Part Number | Quality |
|---|---|---|---|
| 1 | Intake And Exhaust Valve | SE7AG/14, SE7AJ/14 | Original Perkins |
| 2 | Small End Bush | SE91B/7 or Y01/00023 | Original Perkins |
| 3 | Valve Guide | T401899 | Original Perkins |
| 4 | Valve Spring | 365/472 | Original Perkins |
| 5 | Valve Collet | HW7B/18 | Original Perkins |
| 6 | Fuel Filter | SE429B/4 or 4759205 | Original Perkins |
| 7 | Exhaust Manifold | 12SE15AA, 12SE15W, 12SE15U, 12SE15Y | Original Perkins |
| 8 | Air Filter Assembly | SEV551N | Original Perkins |
| 9 | Connecting Rod Assembly | SEV91Q | Original Perkins |
| 10 | Big End Bearing Kit | SE91AA/3M | Original Perkins |
| 11 | Piston And Ring Kit | SE901BA | Original Perkins |
| 12 | Piston Ring Kit | 359/552 | Original Perkins |
| 13 | Starter Motor | 701/134 or 701/137 | Original Perkins |
| 14 | Alternator Belt | 541/398 | Original Perkins |
| 15 | Injector | 858/35 | Original Perkins |
| 16 | Oil Pump | 12SE116C | Original Perkins |
| 17 | Oil Filter | 4324909 / SE111B | Original Perkins |
| 18 | Water Pump Kit | SE145AY / SE145H | Original Perkins |
Full parts availability for Build List DGL / DGLM6235S. Provide ESN for exact part number confirmation.
Procurement & Logistics
· Supply source: Genuine Perkins via first-tier authorised distributor
· Stock status: Confirm availability at inquiry — lead time typically 3–4 weeks
· Export documentation: Commercial invoice, packing list, bill of lading, certificate of origin available as standard
· Shipping: FCL/LCL from Shenzhen/Guangzhou/Shanghai; crating and export packaging included
· Pre-shipment: ESN + nameplate verification completed before dispatch; engine test report available on request
Warranty & After-Sales
Warranty: 12 months or manufacturer-specified hours from date of commissioning, whichever comes first
What the Warranty Does Not Cover
1.Damage resulting from incorrect installation, improper commissioning, or failure to follow the Perkins Operation and Maintenance Manual for DGL /DGLM6235S
2.Wear items consumed during normal operation: filters, belts, coolant, lubricants
3.Damage caused by contaminated fuel, incorrect lubricant specification, or coolant system neglect
4.Modifications or repairs carried out by non-authorized personnel during the warranty period
5.Transit damage not reported within 3 working days of delivery — inspect all shipments on receipt and document any damage before signing
Warranty Claim Process
① Document the fault — Record engine serial number, operating hours, fault symptoms, and photographs of the affected area.
② Notify us within warranty period — Submit documentation via email or WhatsApp. Include engine serial number in the subject line.
③ Technical review — Our engineering team reviews the submission within 2 business days and advises on root cause and next steps.
④ Resolution — Depending on fault assessment: replacement parts dispatched, repair support coordinated, or engine exchange arranged. Resolution path confirmed in writing before any action is taken.
After-Sales Support
- Technical enquiries: Email / WhatsApp — 1 business day response
- Parts identification (DGL /DGLM6235S): Available on request
- O&M Manual & wiring diagrams: Available on request
- Remote fault diagnosis: Email or video call
Transit Damage Protocol
Photograph damage before unpacking · Note on delivery receipt before signing · Notify us within 3 working days with photos · Do not commission a damaged unit before completing the damage report.
FAQ
Q1: What is the rated power output of the 4012-46TAG0A?
At 1500rpm, the engine delivers 1053 kWm net for Prime duty (1250kVA) and 1158 kWm net for Standby duty (1375kVA).
Q2: What are the standard service intervals for this engine?
Oil and fuel service intervals are 500 hours under all operating conditions, as standard for the 4012 series.
Q3: What size generator set can this engine power?
At 1500rpm the engine supports up to 1250kVA at Prime duty and 1375kVA at Standby duty; final set sizing should also account for alternator efficiency and site operating conditions.
Q4: Are the DGLM6235S, DGLM0106S, and DGLM1571S Build Lists interchangeable?
Yes, these Build Lists are treated as fully equivalent for this model, with the same specification and parts commonality.
Q5: How can I verify authenticity and configuration from the Build List?
The Build List prefix identifies the configuration group, but full verification requires matching the complete Build List and ESN against the engine nameplate; confirm both through an authorized distributor before purchase or resale.
Q6: Is the 4012-46TAG0A still in production, or should I consider another variant?
It remains part of the active 4012-46TAG range alongside 4012-46TAG1A, 4012-46TAG2A, and 4012-46TAG3A, which offer higher power outputs; confirm current availability and required power output with your distributor before selecting a variant.
Q7: What are the physical dimensions and weight for new genset integration?
Tropical version: 2269 x 3915 x 2200 mm (H x L x W), dry weight 5690 kg. Temperate version dimensions and weight are pending confirmation.
Q8: Does this engine support 1800rpm/60Hz operation?
No. The 4012-46TAG0A is supplied only in a 1500rpm/50Hz configuration; 1800rpm/60Hz operation is not available for this model.
Request a Quote
Provide the following for fastest response:
· Build List (DGL6235DS or DGLM6235S)
· Engine Serial Number (if replacing existing unit)
· Required rated speed: 1500 rpm
· Destination port and required documentation
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