Place of Origin:
China
Brand Name:
Weichai
Model Number:
6P1222
The 6P1222 / 612601080376 fuel injection pump (EBHF6H, also quoted as BH6PZ130R) is an inline mechanical diesel injection pump assembly for the Weichai WP10 six-cylinder engine family, including the WP10.336NE31 336 HP rating used in HOWO and Shacman trucks and LG953 / LG956 wheel loaders. Both the short trade figure and the long factory figure are listed below, together with the mechanical construction stated plainly — this is a six-plunger inline pump with a mechanical governor, not a common rail unit.
| Product Name | Diesel fuel injection pump assembly, inline mechanical |
|---|---|
| Short Figure | 6P1222 |
| Factory Figure | 612601080376 |
| Pump Type Code | EBHF6H, also quoted as BH6PZ130R |
| Sister Calibrations | 612601080397 with 6P1239, 612601080396 with 6P1240, 612601080457 with 6P1232 |
| Engine | WP10 six-cylinder, 9.7 litre class, turbocharged and charge cooled |
| Rating Shown | WP10.336NE31, 336 horsepower |
| Truck Applications | HOWO and Shacman tractors and tippers |
| Machine Applications | LG953 and LG956 wheel loaders, and other WP10-powered frames |
| Governor | Mechanical, with boost compensator and cold start advance |
| Condition Offered | New, and tested rebuilt with a flow report |
| Packing | Port plugs, shaft cap, foam-blocked carton |
| A Figure That Looks Western | The short figure follows the pattern used by a large western machine maker for its 1980s parts, but it belongs to the pump trade in China. A buyer who searches the western catalogue finds nothing and concludes the part does not exist. |
|---|---|
| Not Common Rail | This is a mechanical unit with six individual plungers and a flyweight governor, so listings that describe it as common rail are describing a different generation of the same engine. |
| The Neighbouring Block | Three other factory figures in the same block differ in the last three digits and cover the higher-rated and lower-rated builds, so a buyer quoting only the engine power can be matched to the wrong plate. |
| Two Engine Families | The smaller six-cylinder of this family appears in the same listings and its pump is shorter, so the long factory figure rather than the engine name should be used. |
| Three Manufacturing Sources | The same figure is produced by several domestic pump works, and the grade difference shows up in the plunger finish rather than the label. |
| Caution — Timing Marks | The coupling is keyed, but the pump body still has to be set to the engine timing pin. Skipping that step produces hard starting and white smoke. |
| Caution — Boost Pipe | The compensator line must be reconnected to the manifold, otherwise the pump behaves as if the turbocharger were absent and the machine loses pulling power uphill. |
| Caution — Delivery Washers | Six single-use washers sit under the delivery holders, and a reused one will seep diesel onto the exhaust side of the head. |
| Caution — Fuel Quality | Water in the tank is the usual cause of a second failure within a season, so the filter and water separator should be replaced together with the pump. |
| Caution — Stop Solenoid | An engine that will not shut down is normally the fuel cut solenoid or its earth rather than the pump itself. |
| Related Components | Feed pump, filter head, delivery washers, coupling, injectors, timing advance unit. |
1. Is this a common rail pump?
No, it is a mechanical inline pump with six plungers.
2. Why can I not find the short figure in a western catalogue?
It is a Chinese trade figure, not a western maker figure.
3. Which number should I send in an enquiry?
The long factory figure from the pump plate.
4. Will it fit the smaller six-cylinder engine?
No, that pump body is shorter.
5. What must be replaced with it?
Delivery washers, filters and the water separator.
6. Why does it smoke after fitting?
The timing pin step was skipped or the compensator line is off.
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