How to Repair Hydraulic Gear Pump: Complete Step-by-Step Guide
Learn how to diagnose & repair hydraulic gear pumps fast. Step-by-step guide covers symptoms, root causes & re…
| Parameter | Specification / verification |
|---|---|
| Part number | W-01-00021 / W0100021 |
| Verified catalog model | CBGj3100 / CBGJ3100 |
| Model variant reference | CBGj3100-2; confirm suffix and physical configuration |
| Other search name | JHP3100 — verify dimensions; not universally interchangeable |
| Equipment brand | Changlin / CHANG LIN; not a verified SDLG application |
| Application references | ZLM50E-5 / ZL50H; serial-number and old-pump matching required |
| Pump construction | Single external hydraulic gear pump |
| Shaft reference | 8 splines per supplied product sheet; verify actual shaft |
| Shaft measurements | Diameter and engagement length to be confirmed |
| Displacement — series reference | 100 cm³/rev |
| Rated / maximum pressure — series reference | 20 / 25 MPa (200 / 250 bar) |
| Rated / maximum speed — series reference | 2200 / 2500 rpm |
| Exact unit operating limits | Confirm ordered configuration; series values are not unit certification |
| Rotation / flange / ports | Verify against original pump and drawing |
| Weight / materials / seals | Confirm selected configuration |
| Other configuration numbers | W-01-00251, W-01-00112, 803004063 — do not assume interchangeability |
| Identification reference | Source nameplate shows W-01-00021 and CBGj3100; V.C.5310001 is a label reference, not a replacement pump number |
| Manufacturer | Olive Branch Hydraulics, Hebei, China |
| Trade / services | EXW; OEM/ODM; private label; sample/drawing matching |
| Inspection | Final inspection before dispatch |
| Photographs | Brand product sheet, shaft-end reference and identification plate; confirm actual ordered configuration |
Olive Branch Hydraulics is a hydraulic component manufacturer in Hebei, China. We produce gear pumps, tandem pumps, hydraulic motors and valves. We manufacture aftermarket W-01-00021 gear pump (also searched as W0100021). In our catalog, W-01-00021 maps to CBGj3100, listed for Changlin wheel loaders, with Changlin ZLM50E-5 and ZL50H as application references.
JHP3100 is a cross-search reference only. A JHP3100 pump does not automatically fit a CBGj3100 position. Before quotation, we check the serial number, shaft, flange and ports against your old pump.
W-01-00021 corresponds to CBGj3100 for Changlin, so you start from a confirmed part link instead of a guess.
Our product sheet lists an 8-spline shaft. We confirm spline count, diameter and engagement length on the unit we quote.
CBGj3100-2 (W-01-00021) is a manufacturer variant. We confirm the suffix before production so mismatched units do not reach your customers.
Send your drawing or old pump and we build to its flange, port and shaft configuration.
Every order goes through final inspection at our factory before EXW handover.
Displacement, pressure and speed come from the CBGj3 series table and are series reference values, not certified ratings for an individual unit.
| Part number | W-01-00021 (W0100021) |
|---|---|
| Pump model | CBGj3100; variant CBGj3100-2, suffix to be confirmed |
| Cross reference | JHP3100, dimension and configuration check required |
| Pump type | External gear pump |
| Displacement | 100 cm³/rev (series reference) |
| Rated / max pressure | 20 / 25 MPa (200 / 250 bar), series reference |
| Rated / max speed | 2200 / 2500 rpm (series reference) |
| Shaft | 8-spline; count, diameter and engagement length verified per order |
| Flange, ports, rotation | Matched to your old pump or drawing |
| Machine references | Changlin ZLM50E-5, Changlin ZL50H |
Not sure your pump is CBGj3100 or CBGj3100-2?Send a nameplate photo plus shaft and flange photos, and we will confirm the variant before you order.
Application reference. Final fit is confirmed by machine serial number and old-pump matching.
Application reference. Serial number and shaft check are required.
A single verified W-01-00021 configuration for Changlin loader parts shelves.
Replacement for a worn CBGj3100 when the original part number is known.
Shaft, flange, port and rotation are built to your drawing or sample.
Your brand on the pump nameplate and packaging.
Neutral or branded cartons, labels and part-number marking.
Combine W-01-00021 with other gear pumps, tandem pumps, motors or valves from our range.
Part number, serial number, photos or drawing, and quantity.
We confirm shaft, flange, ports and suffix.
We build and inspect the sample for your approval.
Volume production to the approved configuration.
Units are inspected, then handed over at our Hebei factory.
Incoterms
EXW
Hebei, China factory
MOQ
Quoted per order
Depends on standard or private-label configuration
Pricing
Quantity-based quotation
Distributors can request price breaks by volume
Samples
Available on request
Configuration confirmed before the sample build
Inspection
Final inspection
Performed before every shipment
Send us your part number, machine serial number, quantity and destination market, and we will quote EXW price and sample availability after checking the configuration.
Email [email protected] WhatsApp +8615075996564
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