Shimadzu Option Parts Radial Unit 2 Assy 3003 for TMP2003 3603 Series Molecular Pump

This product is the original Shimadzu option assembly: Radial Unit 2 (Radial Magnet Bearing 2 + Radial Sensor 2) designed for use with TMP-2003 and the broader 3603 series molecular pumps. It is supplied as a complete unit for repair or replacement of the radial magnetic bearing and the associated radial position sensor — the components that stabilize and monitor rotor position under high-speed, low-pressure operation.

Application models: TMP-2003, TMP-2203 ~ TMP-3603 series molecular pumps.

Original OEM option part assembled for direct replacement—minimizes alignment effort and restores factory-level rotor stability and sensor accuracy.

Key features

• Complete pre-assembled radial magnet bearing plus radial sensor — simplified swap-out for field repair.
• Maintains original bearing geometry and magnetic biasing to preserve rotor centering and vibration performance.
• Sensor calibrated to the OEM specification range for accurate radial position feedback and controller stability.
• Manufactured to Shimadzu's tolerances for compatibility with TMP-2003 / 3603 series rotor systems.
• Reduces downtime: single assembly replacement avoids multiple individual part handling and alignment steps.

Typical technical details

How it works

The radial magnet bearing provides magnetic centering forces that constrain lateral rotor motion, while the radial sensor continuously measures rotor displacement. The sensor output is used by the pump's control electronics to adjust axial and radial biasing and to detect abnormal vibration or instability. Replacing both the magnet and sensor as a single assembly ensures correct relative positioning and electrical interfaces, preserving the pump's dynamic behavior.

Installation and replacement notes

1. Power down pump and follow manufacturer lockout/tagout safety procedures.
2. Discharge any residual stored energy in controls and wait for rotor to stop completely.
3. Remove the pump housing cover according to service manual to access radial bearing area.
4. Carefully unplug sensor connector and note orientation. Remove the old radial assembly mounting screws.
5. Install the new Radial Unit 2 Assy (ensure mounting surfaces are clean). Tighten screws to specified torque. Reconnect sensor wiring to OEM connector only.
6. Perform rotor spin test and sensor calibration/check per Shimadzu service procedures; verify zero offset and response before returning to service.

Maintenance & troubleshooting

• Inspect the assembly for mechanical damage, loose connectors, or corrosion during routine service intervals.
• If the controller reports radial offset alarms or excess vibration after installation, re-check mounting alignment and sensor connector seating.
• Do not attempt to disassemble the magnet/sensor assembly — internal tolerances and calibration will be disturbed.
• Always use the correct OEM assembly to avoid mismatched magnetic biasing or incorrect sensor characteristics.

Ordering and compatibility

For replacement units and further non-standard maintenance parts for Shimadzu molecular pumps, please consult the original parts catalog or your authorized parts supplier. Using the exact OEM assembly preserves pump performance and helps maintain warranty and service agreements. You can view the relevant option parts and make inquiries through the product parts listing here:

Shimadzu molecular pump non-standard maintenance parts

For additional information about Radial Unit 2 Assy 3003, detailed compatibility checks, and ordering, see the dedicated parts page:

Shimadzu Option Parts Radial Unit 2 Assy 3003

Safety precautions

• Only trained service personnel should perform replacement; improper installation can cause rotor crash and catastrophic failure.
• Follow all ESD precautions when handling sensor electronics.
• Keep magnetic assemblies away from magnetic storage media and watches during handling.

If you require OEM repair parts, calibration assistance, or have questions about compatibility with TMP-2003 / 3603 series pumps, consult the parts listing and contact the supplier via the product page:

Shimadzu molecular pump non-standard maintenance parts

Note: The above description is provided to assist with selection and basic servicing. Always refer to the specific Shimadzu service manual for model-specific procedures and torque values.