How Does A Tandem Gear Pump Work?
Tandem gear pumps deliver independent flow from one shaft. Learn how dual stage gear pumps power complex hydra…
| Item | Technical information / selection requirement |
|---|---|
| Material / part number | 9D650-56A030000A0 |
| Physical nameplate model | CBGj 2050/2050 |
| Capitalized model spelling | CBGJ2050/2050 |
| Listing model variants | CBGj2050-2050; CBGJ2050/2050-XF; CBGJ2050-2050-XF, verify suffix and installation |
| Workbook alternate designation | JHP2050/2050A: supplied-catalogue search reference; equivalence requires dimensional and performance confirmation |
| Associated pump listing number | 9D20-593100; supplier lists this beside 9D650-56A030000A0 |
| Additional search references | 56A030000A0; 9F672-56A030000A0, supplier-associated references, not automatic interchangeability |
| Pump type | Tandem external gear pump; two driven sections |
| Primary equipment | Foton Lovol FL936 / FL936F; FL935E and MDSU 3500 supplier-listed applications |
| Additional equipment references | Lonking CDM833 / LG833; SDLG LG933, LG935E, LG936L; Shantui SL30W, supplier-listed, confirm machine configuration |
| Engine application reference | TD226 / WP6G125E in a supplier fitment listing; engine name alone does not establish pump fitment |
| Reference-unit rotation | Left-hand rotation (左旋) printed on the photographed plate; confirm shaft-end convention and actual ordered unit |
| Reference-unit rated pressure | 20 MPa = 200 bar, printed on the photographed plate; not a verified maximum or burst rating |
| Reference-unit rated speed | 2200 r/min, printed on the photographed plate; not a verified maximum speed |
| Nominal displacement reference | 50 / 50 size-code interpretation; obtain the exact displacement sheet before flow calculations |
| Input shaft | Spline connection in supplier description; confirm tooth count, profile, diameter and engagement length |
| Mounting flange | Measure locating pilot, mounting centres, flange thickness and shaft projection |
| Oil ports | Confirm each inlet and outlet bore, flange bolt pitch, thread size and sealing surface |
| Maximum / intermittent pressure | Not verified for this exact replacement configuration |
| Minimum / maximum speed | Not verified; confirm limits and drive ratio before use |
| Volumetric efficiency / actual flow | Not established by the nameplate photo; obtain performance test data |
| Fluid / viscosity / temperature | Machine-approved hydraulic fluid; confirm exact pump operating limits |
| Dimensions / weight | Exact outline dimensions and weight require the supplied configuration drawing |
| Coupling service references | 9D550-54A000004A0 / 9D20-590011, separately listed FL936F pump coupling; not pump numbers |
| Reference coupling dimensions | Supplier lists 6/10 splines, 30 mm, length 74 mm, outside diameter 50 mm; identify which spline belongs to each mating side |
| Traceability fields | Manufacturing number and factory code on the plate are unit identifiers, not alternate pump material numbers |
| Supply brand | Olive Branch Hydraulics aftermarket replacement; original markings shown only as identification references |
Olive Branch Hydraulics supplies aftermarket tandem gear pumps matched to the original mounting and hydraulic configuration. The supplied reference plate identifies material code 9D650-56A030000A0 and model CBGj 2050/2050. Its readable ratings provide a useful starting point for identifying the pump rather than relying only on a general loader-family description.
The photographed unit is marked left-hand rotation, rated pressure 20 MPa and rated speed 2200 r/min. Those values describe the reference unit. They do not establish maximum pressure, maximum speed or the performance of every replacement offered under a similar model name. The quotation should identify the agreed rotation and performance limits of the actual supplied pump.
| Reference | Identification / ordering use |
|---|---|
| 9D650-56A030000A0 | Main material code visible on the nameplate |
| 9D20-593100 | Pump number co-listed by a supplier for FL936F; compare the complete configuration |
| 56A030000A0 | Shortened listing reference; retain the full code when ordering |
| 9F672-56A030000A0 | Associated supplier listing reference; confirm the equipment serial number |
| CBGj2050/2050; CBGJ2050/2050 | Original capitalization and common capitalized spelling |
| CBGj2050-2050; CBGJ2050/2050-XF | Listing punctuation and suffix variants; suffix details require verification |
| JHP2050/2050A | Supplied-workbook alternate designation; not confirmed as identical to the photographed CBGj unit |
| Machine / engine reference | Fitment status |
|---|---|
| Foton Lovol FL936 / FL936F | Direct pump listing application; verify serial number and original plate |
| Foton Lovol FL935E; MDSU 3500 | Supplier-listed applications for this part number and model |
| Lonking CDM833 / LG833 | Additional supplier fitment reference; compare shaft, flange, ports and rotation |
| SDLG LG933 / LG935E / LG936L; Shantui SL30W | Additional supplier fitment references; not universal interchangeability |
| TD226 / WP6G125E | Engine references in a supplier list; match the drive arrangement and equipment configuration |
Equipment names are identification leads for customers searching by machine model. Production changes can alter the pump drive, port orientation or mounting arrangement. Please provide the machine model and serial number, the old pump material number, its full model suffix and clear views of the shaft end and oil connections. A matching engine model alone is insufficient to confirm installation.
The reference plate pressure converts from 20 MPa to 200 bar. The printed 2200 r/min is a rated-speed reference rather than a promise that every hydraulic system should operate at that speed. Verify the engine-to-pump drive ratio, actual circuit pressure and the permissible limits for each section. The 50/50 model-size interpretation requires an exact displacement sheet before it is used as a certified displacement specification.
Once displacement is confirmed, calculate each section separately: theoretical flow in L/min equals displacement in cm³/rev multiplied by pump rpm, divided by 1000. Actual flow also depends on volumetric efficiency, oil viscosity and operating pressure. Request a test report when a defined flow at a defined pressure and speed is required.
Measure the shaft outside diameter, spline profile, tooth count and engagement length. Record the locating pilot, mounting bolt centres and flange thickness. Identify the inlet and both outlet connections, including bore diameter, flange bolt pitch, threads and seals. Establish the rotation convention from the shaft end and compare it with the original direction marking before installation.
The FL936F coupling appears in supplier lists as 9D550-54A000004A0 / 9D20-590011. Its published description includes 6/10 splines, a 30 mm reference, length 74 mm and outside diameter 50 mm. These are separate coupling references: they do not make both spline counts pump-shaft specifications, and the coupling numbers are not complete pump numbers.
The gallery includes an Olive Branch branded pump image, a side view and the readable reference nameplate. Captions and physical markings support identification; final replacement branding and colour are confirmed with the order. Serial numbers and factory codes identify a photographed unit and should not be treated as additional material numbers.
For a quotation, send quantity, destination and the original pump information. Olive Branch Hydraulics can discuss sample matching, OEM/ODM and the inspection requirements agreed for the order. Confirm the final drawing, ratings and rotation before shipment.
Can I search by 9D20-593100? Yes. It is included as a supplier-associated pump reference, with a requirement to compare the original configuration.
Are CBGJ2050/2050 and JHP2050/2050A automatically interchangeable? No. Similar listings and size codes require a comparison of mounting, shaft, ports, rotation and performance.
Is 20 MPa the maximum pressure? The visible plate labels it rated pressure. Maximum and intermittent pressure require separate confirmation.
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