Bijur lubrication pumps have been used in machine tools, compressors, and industrial equipment for decades. When an original pump fails or becomes hard to source, an aftermarket-compatible replacement is often the fastest way to get the system running again. This guide explains what to check before ordering and how to compare costs.
Related: complete guide to grease pumps · Alemite grease pump options · Need hardware? grease pump range
Why Replace a Bijur Lubrication Pump?
Like any pump, Bijur units wear out over time. Common reasons for replacement include:
- Internal leakage and low outlet pressure
- Motor burnout or seized drive
- Cracked reservoir or housing
- Long lead times for original spare parts
- Older pumps that are no longer supported
In many cases, replacing the pump is cheaper and faster than rebuilding an old unit, especially when compatible aftermarket pumps are available.
Common Bijur Pump Types and Compatible Replacements
Bijur systems cover several pump styles. The table below lists the most common categories and what to look for in a compatible replacement.
| Bijur Pump Type | Typical Use | Replacement Focus |
|---|---|---|
| Gear-driven oil pump | Machine tool slideways and bearings | Match flow rate, voltage, and mounting footprint |
| Motor-driven grease pump | Centralized grease systems | Match pressure rating, reservoir size, and grease grade |
| Piston-type pump | High-pressure lubrication circuits | Match displacement and max pressure |
| Air-operated pump | Pneumatic lubrication systems | Match air pressure range and output ratio |
the operator do not need an exact model-to-model match. A replacement is suitable when voltage, pressure, flow, and port spacing meet the system requirements.
What to Check Before Ordering a Replacement
- Voltage and phase — Confirm whether the pump runs on 24 V DC, 110 V AC, 220 V AC, or three-phase power.
- Pressure rating — The replacement should meet or exceed the system’s normal operating pressure.
- Flow or displacement — Match the pump output to the total demand of the lubrication points.
- Reservoir size — Use the same or larger capacity to avoid frequent refills.
- Grease or oil grade — Confirm the pump material and seals are compatible with the lubricant.
- Mounting holes and port positions — A different footprint may require a simple adapter plate.
If the operator are unsure about any of these points, send a photo of the nameplate and a short description of the application. Most suppliers can cross-reference the specs.
Aftermarket vs OEM: Simple Cost Comparison
The main advantage of an aftermarket Bijur-compatible pump is cost and availability. Below is a simple example for comparison.
| Cost Factor | aftermarket-compatible replacement | Aftermarket-Compatible Replacement |
|---|---|---|
| Unit price | Higher | Lower |
| Lead time | Often weeks | Usually days |
| Warranty | Standard OEM terms | Supplier warranty, varies by product |
| Availability | Limited for obsolete models | Broad for common pump types |
| Performance | Matches original spec | Should match rated pressure and flow |
For older equipment, the savings can be significant. A machine that sits idle waiting for an OEM part loses production value every day. A same-week aftermarket replacement often pays for itself by avoiding downtime.
Installing and Commissioning a Replacement Bijur-Compatible Pump
After selecting a compatible replacement pump, proper installation determines how long the pump and the rest of the system will last. A misaligned pump, an undersized electrical supply, or a line left full of old oil can cause early failure.
- Lock out power and relieve pressure. Confirm the machine cannot start and that the old pump’s supply line is depressurized.
- Drain and clean the reservoir. Remove contaminated oil or grease. Inspect the bottom of the reservoir for metal particles or sludge that could damage the new pump.
- Match mounting footprint. Align the pump mounting holes with the existing bracket. Use an adapter plate if the new unit has a different bolt pattern.
- Connect inlet and outlet ports. Use the same port sizes or approved adapters. Avoid sharp bends in suction lines.
- Wire to the correct voltage. Confirm 24 V DC, 110 V AC, 220 V AC, or three-phase connections match the nameplate. Reverse polarity on a DC motor can damage the controller.
- Set the controller timer or pressure switch. Program the on-time, off-time, and low-level alarm according to the application. PDI oil systems usually need shorter cycles than grease systems.
- Prime and run manually. Fill the reservoir, trigger a manual cycle, and verify lubricant reaches the farthest point without air pockets.
- Run several automatic cycles and inspect. Check for leaks, abnormal noise, and correct pressure readings.
For Bijur-compatible replacement options, see the Bijur-compatible lubrication pumps and oil lubrication pumps categories.
Quick Troubleshooting After Installation
Even a correctly selected replacement pump can show problems on first start. Most issues are simple to fix if they are diagnosed in the right order.
| Symptom | Probable Cause | Action |
|---|---|---|
| Pump motor does not run | No power, blown fuse, or reversed polarity | Check voltage at the terminal block and confirm polarity on DC units |
| Pump runs but no lubricant flows | Air lock, empty reservoir, or blocked inlet | Fill reservoir, prime suction line, and clean the inlet strainer |
| Pump runs continuously without reaching pressure | Large leak or failed pressure switch | Inspect fittings and test the pressure switch with a gauge |
| Excessive noise or vibration | Misalignment or cavitation | Realign mounting and confirm suction line is not restricted |
If the problem persists after these checks, verify that the replacement pump’s flow rate and pressure rating match the original system design. A pump that is undersized for the number of lubrication points will overwork and fail early.
Frequently Asked Questions About bijur lubrication pump
Can the engineer replace a Bijur pump with a non-Bijur unit?
Yes. Many operators use aftermarket-compatible pumps when the original unit is expensive or slow to deliver. The key is matching the technical specs, not the brand name.
Do the engineer need to replace the entire system?
Usually not. If the lines, fittings, and metering devices are in good condition, only the pump needs replacement. Test the rest of the system before commissioning the new pump.
What if the Bijur pump model is obsolete?
Obsolete models are a common reason to choose an aftermarket replacement. Provide the old nameplate data and the supplier can recommend a compatible unit with the same performance.
How do the engineer know if the replacement pump will fit?
Compare mounting dimensions, inlet/outlet port sizes, and electrical connections. If they differ slightly, adapter plates or fittings are usually available.
What should the engineer do before installing a replacement Bijur pump?
Drain and clean the reservoir, relieve system pressure, verify voltage and phase, and confirm the mounting footprint. Clean oil and a clear inlet strainer protect the new pump from day one.
Why does the replacement Bijur-compatible pump run but not build pressure?
The most common causes are an air lock in the suction line, a blocked inlet strainer, or an open leak downstream. Prime the pump, clean the strainer, and inspect the distribution network for leaks.
Request a Bijur-Compatible Pump Quote
Tell ISOHITECH the pump model, voltage, pressure, and application. ISOHITECH can suggest an aftermarket-compatible replacement and verify the main dimensions before the operator place an order.
Browse the Bijur-compatible lubrication pumps to see available replacement options.
Disclaimer: IsoHiTech is not affiliated with, endorsed by, or an authorized distributor of Bijur Delimon. Bijur® and related trademarks are property of their respective owners. This guide discusses aftermarket-compatible replacement options for technical evaluation only.
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Disclaimer: IsoHiTech is not affiliated with, endorsed by, or an authorized distributor of Bijur Delimon. Bijur® and related trademarks are property of their respective owners. This guide discusses aftermarket-compatible replacement options for technical evaluation only.
