Aftermarket TM Series Electric Oil Pumps
This page describes aftermarket electric oil pumps that cross-reference the Bijur Delimon TM series. Bijur Delimon is a trademark of its respective owner. These are aftermarket pumps, not manufactured, sponsored, or endorsed by Bijur Delimon. TM series designations are for cross-reference identification only.
These are motor-driven spring-discharge piston pumps for single-line resistance (SLR) cyclic oil systems. The motor runs continuously and an internal cam compresses a spring-loaded piston at fixed intervals. Each release discharges a metered volume into the main line. The result is a repeating lubrication event that feeds oil to downstream meter units and bearing points.
Fixed Cycle, Adjustable Volume
The cycle interval is set by the gear reduction motor and cannot be adjusted on a running pump. Different cycle times are separate part numbers, not field modifications. The discharge volume per cycle is adjustable via the marked indicator rod on the pump body. Because the cycle time is fixed per part number and the shot volume is adjustable, buyers must specify both shot volume and cycle interval when ordering.
For example, a pump with a 15 minute cycle can dispense one adjustable volume every 15 minutes. A pump with a 72 minute cycle will release its adjustable volume less often. Selecting the correct part number means matching the system demand to both the interval and the dose range.
Model Comparison
| Model | Part numbers | Cycle | Discharge | Points | Voltage | Reservoir |
| TM-1 | C2897C, C2894C, C2893C, C2892C | 7.5, 15, 72, 144 min | 0.2-1 ml | 1-20 | 220 V | 475 ml |
| TM-3 | 53365-1, 53365-2 | 60, 120 min | 0.6-3 ml | 1-20 | 220 V | 475 ml |
| TMD-5 | 18101-21 to 18101-26 | 6.4 to 128 min | 1-5 ml | 1-50 | 110 or 220 V | 1800 ml |
| XTM-5 | 33712-1 to 33712-6 | 6.4 to 128 min | 1-5 ml | 1-50 | 110 or 220 V | 2000 ml |
Oil Only, Cyclic Only
These pumps are for oil lubrication only, never grease. Use oil with viscosity from 32 to 750 cSt. The pump is designed for cyclic meter units, including FJB style meter units, and not for continuous-flow systems. A suction filter protects the meter units from contamination and helps keep discharge volumes consistent.
Do not use this pump on a system that expects a continuous oil supply. The spring-discharge action creates a pulse of oil at each cycle, which is correct for SLR arrangements with cyclic distribution. Using grease or very high viscosity material will prevent the piston from returning properly and may damage the pump.
Selecting a Replacement
Match the full part number, not the model name. The same model family has different cycle times, voltages, and reservoir sizes. Two pumps can both be marked TM-1 but operate on 7.5 minute and 144 minute cycles. Check nameplate voltage and cycle time before ordering.
For more background on how these pumps work within a larger system, see single-line lubrication system and oil pump. The correct replacement depends on the original part number and the system design, not just the series name.
What to Confirm Before Ordering
Confirm the full part number or nameplate data from the original pump. Confirm voltage, since 110 or 220 V options exist on some models. Confirm the cycle interval, because fixed cycles range from 6.4 to 144 min depending on the part number. Confirm the discharge range covers your need. Confirm the point count is within range.
Understanding the broader system helps avoid mismatches; read what is a central lubrication system. If you are unsure about any value, contact the team with your nameplate data.
Frequently Asked Questions
Can a TM series pump be used with grease?
No, these pumps are for oil only. Use oil with viscosity from 32 to 750 cSt.
Is the cycle time adjustable on the pump?
No, the cycle is fixed per part number. Discharge volume is adjustable.
What is the difference between TM-1 and TM-3?
The TM-3 has a larger dose per cycle. Both serve a 1 to 20 point range.
When should I choose TMD-5 or XTM-5 instead?
Choose them for more points, 1-5 ml doses, and bigger reservoirs. They suit larger systems.
Is the XTM-5 a drop-in replacement for TMD-5?
Not always. Confirm voltage, cycle, and mounting first.
What voltage do these pumps require?
The TM-1 uses 220 V. The TMD-5 has 110 or 220 V options.
What reservoir sizes are available?
Sizes are 475, 1800, or 2000 ml by model. Check your part number.
How many points can each model support?
Small models support 1 to 20 points. Large models support 1 to 50.
What oil viscosity is acceptable?
Use 32 to 750 cSt. Do not use grease or heavier material.
Who builds these pumps, and how do I get a quotation?
IsoHiTech Lubrication Systems, founded in 2023, engineering since 2006, builds and supports every unit. Email inquiry@isohitech.com for specifications and a quotation.
Contact the team with your part number and nameplate photo.
