Weichai Generator Parts — OEM & Aftermarket Spare Parts Supplier

Key Takeaways

– Complete parts coverage for Weichai WP4, WP6, WP10, WP12, WP13, 12M26, and 12M33 series diesel generator engines from 20 kVA to 1,650+ kVA.
– 34+ verified OEM part numbers extracted from Huaquan’s parts catalog — including pistons, cylinder heads, water pumps, turbochargers, oil pumps, and sensors — all cross-referenced to Weichai factory specifications.
– Cost advantage: As China’s largest diesel engine manufacturer, Weichai parts benefit from a mature domestic supply chain. Huaquan factory-direct pricing typically delivers 40–60% savings versus international distributors, with 24-month warranty and ISO 9001:2015 certification.

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Brand Overview & Engine Series

Weichai Power Co., Ltd., headquartered in Weifang, Shandong, China, is China’s largest diesel engine manufacturer and one of the world’s top three heavy-duty engine producers. With annual production exceeding 1 million engines, Weichai holds dominant market share in China’s power generation, construction machinery, and heavy truck sectors. Weichai generator engines are widely exported to Africa, the Middle East, Southeast Asia, and South America. In 2012, Weichai acquired a 25% stake in German forklift and engine manufacturer KION Group, and through strategic partnerships with Baudouin (France) and collaborations with AVL (Austria), Weichai engine technology has achieved international standards. Huaquan, headquartered in Weifang — the home city of Weichai — has leveraged its geographic proximity to become a premier Weichai parts supplier, with direct factory access and rapid turnaround times.

Weichai Generator Engine Series

| Engine Series | Cylinders | Displacement (L) | Power Range (kVA) | Common Applications |
|————–|———–|——————-|———————|———————|
| WP4 | 4 Inline | 4.5 | 20–50 | Small commercial, telecom |
| WP6 | 6 Inline | 6.75 | 40–100 | Commercial, agricultural |
| WP10 | 6 Inline | 9.726 | 80–240 | Industrial standby, construction |
| WP12 | 6 Inline | 11.596 | 200–350 | Heavy industrial, mining |
| WP13 | 6 Inline | 12.54 | 250–480 | Prime power, utilities |
| 12M26 | 6 Inline | 25.8 | 400–1,000 | Large industrial, data centers |
| 12M33 | 12 V-type | 32.7 | 600–1,650 | Power plants, utilities |

Generator Model Compatibility

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OEM Part Numbers & Cross Reference for Weichai Generator Parts

| # | Part Name | OEM No. | Engine Model | Cross Reference | Technical Specifications |
|—|———–|———|————-|—————–|————————–|
| 1 | Main Bearing Shell (Upper+Lower) | 612600010039 | WP12 | — | Tri-metal, STD |
| 2 | Main Bearing Shell (Upper) | 612600010310 | WP12 | — | Tri-metal |
| 3 | Connecting Rod Bearing Shell | 61560030032 | WP12 | — | Tri-metal, standard |
| 4 | Oxygen Sensor | 612630130010 | WP12/WP13 | — | Lambda sensor, 5-wire |
| 5 | Camshaft Assembly | 612600050080 | WP12 | — | Chilled cast iron, 12-lobe |
| 6 | Camshaft Thrust Plate | 612600050036 | WP12 | — | Steel, hardened |
| 7 | Electronic Governor | 612640110042 | WP12/WP13 | — | Electronic, CAN-bus |
| 8 | Intake Manifold Gasket | 614600081 | WP12 | — | Graphite composite |
| 9 | Water Pump Housing | 612600150009 | WP12 | — | Cast iron, centrifugal |
| 10 | Fuel Return Line Assembly | 612640130012 | WP12 | — | Stainless steel, high-pressure |
| 11 | Generator Fan | 612600140186 | WP12/WP13 | — | 8-blade, pusher type |
| 12 | Fan Belt | 61260014332 | WP12 | Gates | V-ribbed, 8PK, 1400mm |
| 13 | Fan Belt | 61260014335 | WP12 | — | V-ribbed, 8PK, 1850mm |
| 14 | Fuel Injector | 612640110022 | WP12/WP13 | — | 6-hole, 240 bar |
| 15 | Fan Hub Assembly | 612600140005 | WP12 | — | Cast iron, viscous clutch |
| 16 | Fuel Injector Pipe | 612640130004 | WP12 | — | High-pressure steel, 8mm |
| 17 | Water Pump | 612600150007 | WP12 | — | Centrifugal, 280 L/min |
| 18 | Oil Return Pipe (Turbo) | 612600110059 | WP12 | — | Stainless steel, braided |
| 19 | Radiator Assembly | 612600140097 | WP12 | — | Copper core, 5-row |
| 20 | Radiator Assembly | 612600140109 | WP12 | — | Aluminum core, high-efficiency |
| 21 | Oil Cooler Cover | 612600130001 | WP12 | — | Cast aluminum |
| 22 | Oil Cooler Core | 612600130002 | WP12/WP13 | — | Plate-type, 12-plate |
| 23 | Turbocharger | 612600110057 | WP12/WP13 | Holset HX40 | Twin-scroll, 28 psi |
| 24 | Crankshaft Pulley | 612600100023 | WP12 | — | Steel, dampened |
| 25 | Air Compressor Assembly | 612600130020 | WP12/WP13 | — | Single-cylinder, 8 bar |
| 26 | Piston Assembly | 612600030006 | WP10 | — | Aluminum, 3-ring |
| 27 | Cylinder Head | 612600040004 | WP12 | — | Individual, 4-valve |
| 28 | Cylinder Liner | 612600020012 | WP12 | — | Wet-type, 126mm |
| 29 | Ring Set (Piston) | 612600030010 | WP12 | — | 3-piece, chrome-plated top |
| 30 | Oil Filter | 612600130007 | WP12/WP13 | Fleetguard LF16352 | Spin-on, 20 micron |
| 31 | Fuel Filter | 612640140002 | WP12/WP13 | Fleetguard FF5052 | 10 micron |
| 32 | Air Filter | 612600140112 | WP12/WP13 | Fleetguard AF25478 | Dry type, radial seal |
| 33 | Thermostat | 612600150004 | WP12 | — | 83°C, high-flow |
| 34 | Starter Motor | 612600090004 | WP12/WP13 | — | 24V, 5.5 kW |
| 35 | Alternator | 612600080003 | WP12/WP13 | — | 28V, 55A |
| 36 | Fuel Feed Pump | 612640130020 | WP10/WP12 | — | Mechanical, 4 bar |
| 37 | Flywheel Assembly | 612600100050 | WP12 | — | Steel, dynamically balanced |
| 38 | Intake Valve | 612600040012 | WP12 | — | 43mm head, Stellite seat |
| 39 | Exhaust Valve | 612600040016 | WP12 | — | 39mm head, sodium-filled stem |
| 40 | Head Gasket | 612600040010 | WP12 | — | MLS, 1.4mm compressed |
| 41 | Oil Pump Assembly | 612600150002 | WP12 | — | Gear-type, 55 PSI |
| 42 | Gas Filter (CNG) | 612640140001 | WP12NG | — | 5 micron coalescing |

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Engine-Generator Compatibility Matrix

| Engine Model | Cyl/Config | Bore × Stroke (mm) | Displacement (L) | Rated RPM | kWm Range | BSFC (g/kWh) | Emission Standard |
|————-|————|———————|——————-|———–|———–|————–|——————-|
| WP4D68E200 | 4L | 105 × 130 | 4.5 | 1500/1800 | 18–43 | 210 | China Stage III |
| WP4D100E200 | 4L | 105 × 130 | 4.5 | 1500/1800 | 32–56 | 208 | China Stage III |
| WP6D132E200 | 6L | 105 × 130 | 6.75 | 1500/1800 | 48–88 | 205 | China Stage III |
| WP6D152E200 | 6L | 105 × 130 | 6.75 | 1500/1800 | 72–110 | 203 | China Stage III |
| WP10D238E200 | 6L | 126 × 130 | 9.726 | 1500/1800 | 120–200 | 200 | China Stage III |
| WP10D264E200 | 6L | 126 × 130 | 9.726 | 1500/1800 | 200–260 | 198 | China Stage III |
| WP12D317E200 | 6L | 126 × 155 | 11.596 | 1500/1800 | 240–330 | 195 | China Stage III |
| WP13D385E200 | 6L | 127 × 165 | 12.54 | 1500/1800 | 310–420 | 193 | China Stage III |
| 12M26D572E200 | 6L | 150 × 150 | 25.8 | 1500 | 450–750 | 190 | China Stage III |
| 12M33D968E200 | V12 | 150 × 150 | 32.7 | 1500 | 800–1,400 | 188 | China Stage III |

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OEM vs Aftermarket Parts for Weichai Generators

Recommendation

For Weichai engines, the aftermarket ecosystem is highly mature due to the massive installed base (millions of engines globally). Huaquan’s geographic location in Weifang provides a unique advantage: direct access to Weichai’s supply chain and technical documentation. For WP4/WP6/WP10/WP12/WP13 series engines, our aftermarket parts are the optimal choice for post-warranty maintenance. For 12M26 and 12M33 large-bore engines, we offer a hybrid approach: aftermarket consumables (filters, belts, gaskets) and OEM or OEM-equivalent major components.

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Case Study: 12 × Weichai WP12D317E200 Generator Fleet — Myanmar Mining Operation

Client: Myanmar Mining Resources Co., Ltd., Mandalay Region, Myanmar
Project: Complete parts supply and lifecycle management for 12 × Weichai WP12D317E200 generator sets powering a jade mining operation
Timeline: Since January 2023
Challenge: The mining operation is located 180 km northeast of Mandalay in a remote mountainous region where grid power is nonexistent. Twelve Weichai WP12D317E200 generators (3,800 kW total) power the entire operation: crushing machinery, conveyor belts, camp facilities, and water pumps. Due to 24/7 operation at 75–85% load factor, the generators accumulated 4,000–4,500 hours per year — roughly equivalent to 2.5 years of standby generator usage in just 12 months. The local Weichai dealer in Mandalay maintained a limited parts inventory and charged import-level markups (2–3× factory-direct pricing), with 6–8 week delivery for non-stock items.

Solution: Huaquan proposed a direct factory-to-mine parts program: (1) A complete annual maintenance kit for each generator — 12 × oil filters (612600130007), 12 × fuel filters (612640140002), 12 × air filters (612600140112), and 12 × V-belt sets (61260014332/335) delivered quarterly. (2) A critical spares inventory maintained on-site: 6 × water pump assemblies (612600150007), 6 × thermostat kits (612600150004), 3 × turbocharger assemblies (612600110057), 3 × starter motors (612600090004). (3) Semi-annual major component shipments including piston ring sets and cylinder head gaskets for scheduled top-end overhauls at 12,000-hour intervals.

All parts shipped via sea freight from Qingdao to Yangon (18 days) with truck delivery to the Mandalay mine site (2 days). Total annual parts cost: $32,400 versus the local dealer quote of $97,000 — a 67% savings.

Result: 30 months of uninterrupted mining operation with zero generator-related production downtime. The mine manager reported that parts reliability exceeded expectations: “We haven’t had a single Weichai generator failure since switching to Huaquan parts. The pre-positioned spares program means we never wait for parts.” The mining company has since introduced Huaquan to two other mining operators in the Sagaing region.

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Maintenance Checklist for Weichai Generators

Daily

– [ ] Check engine oil level (Weichai-approved CF-4/CH-4 15W-40)
– [ ] Check coolant level (50:50 ethylene glycol)
– [ ] Drain water from fuel filter
– [ ] Visual inspection: oil, coolant, fuel leaks
– [ ] Record operating hours

Every 250 Hours

– [ ] Replace engine oil and oil filter (612600130007)
– [ ] Replace primary and secondary fuel filters (612640140002)
– [ ] Check belt tension
– [ ] Clean air filter element (replace at 500 hours)
– [ ] Inspect radiator exterior for debris

Every 500 Hours

– [ ] Replace air filter element (612600140112)
– [ ] Check valve clearances (WP12: intake 0.30mm, exhaust 0.45mm — cold)
– [ ] Inspect turbocharger (axial/radial play, oil leakage)
– [ ] Test safety shutdowns

Every 1,000 Hours

– [ ] Fuel injector inspection and cleaning
– [ ] Compression test
– [ ] Replace fuel feed pump if pressure below 3.5 bar
– [ ] Coolant analysis and SCA replenishment

Every 3,000 Hours

– [ ] Replace thermostat (612600150004)
– [ ] Water pump inspection
– [ ] Oil cooler cleaning
– [ ] Starter motor and alternator service
– [ ] Complete coolant replacement

Every 12,000 Hours (Top-End Overhaul)

– [ ] Replace cylinder head gaskets
– [ ] Valve and valve seat reconditioning
– [ ] Replace piston rings and inspect liners
– [ ] Replace connecting rod bearings
– [ ] Turbocharger overhaul or replacement

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Why Huaquan for Weichai Generator Parts

The Weifang Advantage

Huaquan’s headquarters and main factory are located in Weifang, Shandong — the same city as Weichai Power’s global headquarters and primary manufacturing base. This geographic proximity delivers three unique advantages: (1) direct supply chain access to raw material suppliers that feed the Weichai ecosystem, (2) availability of Weichai-trained technicians and engineers within the local workforce, and (3) the fastest possible turnaround times for Weichai engine parts — typically 24–48 hours for standard items and 5–7 days for custom-manufactured components.

Comprehensive Quality Control

All Weichai-compatible parts undergo: material composition verification via Bruker Q4 spectrometer; dimensional inspection on Zeiss CMM (±0.005mm); Rockwell hardness testing for wear components; and, for critical rotating assemblies (crankshaft, connecting rods, pistons), dynamic balancing to ISO 1940 G2.5 standard.

Export Logistics

Huaquan ships Weichai parts to 60+ countries. Standard export packaging: vacuum-sealed anti-rust wrapping, foam-lined export-grade plywood cases, and full customs documentation including Certificate of Origin (Form E for ASEAN, Form F for Chile, GSP for EU).

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Frequently Asked Questions

1. What is the most popular Weichai generator engine?

The Weichai WP12D317E200 is the most widely used generator engine, powering generator sets in the 300–350 kVA range. It is the workhorse of construction site power, mining operations, and industrial backup across Africa, Southeast Asia, and the Middle East.

2. Are Weichai and Baudouin parts interchangeable?

Some parts are interchangeable because Weichai and Baudouin (a Weichai subsidiary since 2009) share certain engine platforms. The Weichai WP12/Baudouin 12M26 engines have parts commonality. Always verify with part numbers.

3. What is the service interval for a Weichai WP12 generator?

Oil and filter change: 250 hours. Fuel filters: 250 hours. Air filter: 500 hours. Major service: 3,000 hours. Top-end overhaul: 12,000 hours. These intervals assume CF-4/CH-4 oil and diesel fuel meeting national standards.

4. What oil should I use in a Weichai generator?

Weichai recommends API CF-4 or CH-4 15W-40 diesel engine oil. In ambient temperatures below -10°C, use 10W-30. Oil capacity: WP12 ~28L, WP10 ~22L, WP6 ~16L.

5. What is the MOQ for Weichai parts?

Sample orders: 1 piece. Best pricing: 50+ filters, 10+ pistons/liners, 5+ cylinder heads or turbochargers. Distributor pricing available for annual contracts exceeding $30,000.

6. How long does shipping take from Weifang?

Air freight (DHL/FedEx): 3–7 days worldwide. Sea freight: 18–35 days depending on destination port. We regularly ship to Mombasa, Lagos, Jakarta, Dubai, Lima, and Chittagong.

7. Do you supply Weichai natural gas (CNG/LNG) generator parts?

Yes. We supply gas-specific components for Weichai WP10NG, WP12NG, and 12M26NG gas engines, including gas filters, spark plugs, ignition coils, and gas regulators. Gas engine parts typically have different part numbers from diesel variants.

8. Are Huaquan Weichai parts genuine OEM?

We supply both genuine Weichai OEM parts and our own ISO 9001:2015 certified aftermarket parts. Genuine OEM parts carry the Weichai holographic label and are priced at Weichai export pricing. Aftermarket parts are clearly labeled as Huaquan and priced 40–60% below OEM.

9. What warranty applies to Weichai parts?

All parts carry a 24-month warranty from the date of shipment. Claims require photographic documentation and a failure description. Replacement parts are dispatched within 5 working days.

10. Can you supply complete Weichai generator sets, not just parts?

Yes. Huaquan manufactures complete Weichai-powered generator sets from 20 kVA to 1,650 kVA. All generator sets include a 12-month warranty, factory load testing, and export certification. Contact us for generator set pricing.

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Get a Quote — Weichai Generator Parts

Why Huaquan for your Weichai generator parts:

– Based in Weifang, same city as Weichai HQ — direct supply chain access
– 10+ years supplying Weichai parts globally
– ISO 9001:2015 certified manufacturing
– 24-month warranty
– 67% cost savings documented (Myanmar mining case study)
– DHL/FedEx in 3–7 days; sea freight 18–35 days
– Technical support in English, French, Chinese, Arabic
– Low MOQ — 1 piece for samples
– Both OEM and high-quality aftermarket options available

Contact us for a quotation within 24 hours:

– Email: lb@hqdl.cn
– WhatsApp: +86-138-xxxx-xxxx
– Download Catalog: Weichai Parts Catalog (PDF)
– RFQ: Include engine model and required part numbers

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Related Products

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– Generator Cylinder Heads — All Brands
– Generator Cylinder Liners — All Series
– Generator Pistons & Ring Kits
– Generator Radiators & Cooling Systems
– Generator Alternators — Stamford, Marathon
– Generator Sensors & Actuators
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Weichai Generator Parts | OEM & Aftermarket Spare Parts for WP Series Engines