This product is the Shimadzu A Unit of Motor Stator (motor assembly) — an original replacement part designed for repair and refurbishment of the TMP series molecular pumps. Specifically manufactured to meet OEM tolerances, this motor stator assembly (often referenced as the "3203" motor unit) is compatible with SHIMADZU TMP‑2003 through TMP‑3603 series pumps and restores reliable rotational drive, electrical insulation integrity, and dynamic balance required for high‑vacuum service.
Key compatibility and identification:
- Applicable models: SHIMADZU TMP‑2003 ~ TMP‑3603 series (includes TMP‑3203 ~ TMP‑3603 variants).
- Function: Replaces the motor stator section (A Unit) of the TMP molecular pump motor assembly — contains the stator windings, insulation, core laminations and mounting features that mate to the pump rotor and housing.
- OEM quality: Manufactured or rebuilt to match original electrical and mechanical specifications for fit, performance and service life.
Main features and construction:
- Precision‑wound copper stator coils with high‑temperature epoxy impregnation for long service life and stable insulation resistance under vacuum pump operating conditions.
- Machined stator core and housing to OEM dimensional tolerances for accurate rotor clearance and minimal vibration.
- Robust connector interfaces and cable pigtails (when applicable) compatible with original motor harness and feedthroughs.
- Quality control includes winding continuity, insulation resistance testing, dynamic balancing, and bench spin testing before shipment.
Recommended replacement indicators:
- Increased motor current draw or frequent motor trips.
- Unusual motor noise, vibration or decreased ultimate vacuum / pumping speed.
- Visible heat damage, burn marks or loss of insulation resistance on the stator winding.
- After bearing replacement or rotor refurbishment — replacing the stator as part of a comprehensive rebuild is recommended to guarantee OEM alignment and performance.
Typical installation and bench replacement procedure (summary):
- Ensure the pump is fully isolated from system vacuum and power; wear ESD and contamination control protection.
- Remove motor housing and rotor assembly following Shimadzu service manual instructions. Keep fasteners and spacers organized for accurate reassembly.
- Inspect rotor bearings and shaft; replace bearings if wear or contamination is detected before installing the new stator.
- Install the stator A Unit into the motor housing, ensuring correct seating, connector orientation and secure fastening to OEM torque recommendations (refer to service manual for exact torque values).
- Reassemble rotor, balance check, and perform no‑load bench spin test to verify smooth rotation and acceptable current draw.
- Conduct a vacuum test with pump installed to confirm pumping speed and ultimate pressure meet specifications.
Inspection and post‑installation testing:
- Insulation resistance (megger) test across stator windings and to housing.
- Winding continuity and phase checks to confirm correct wiring.
- Rotor/stator clearance verification and dynamic balance at operating speeds.
- Operational test under vacuum: monitor motor current, bearing temperature, and vibration levels during run‑in.
Maintenance, storage and handling recommendations:
- Store in a clean, dry, and temperature‑controlled environment. Avoid prolonged exposure to humidity and corrosive atmospheres.
- Handle stator coils and connectors with care to prevent damage to windings, insulation and lead wires — use antistatic packaging if provided.
- For long term storage, periodic insulation checks are advised to detect moisture ingress early.
Ordering, warranty and quality assurance:
- This motor stator A Unit is supplied as an OEM or OEM‑equivalent repair part. Each unit is tested before dispatch to ensure performance criteria are met.
- Packaging is designed to protect against mechanical shock and electrostatic damage during shipping. We provide documentation of bench tests and QC inspection with each unit.
- Contact your service provider for warranty terms and return policy details for repair parts and rebuild services.
For additional non‑standard maintenance parts, repair options and compatibility guides for Shimadzu molecular pumps, please refer to our parts catalog and service resources:
Shimadzu molecular pump non-standard maintenance parts — explore complementary components and rebuild kits.
If you need in‑depth repair assistance, rebuild services, or to confirm exact fitment for a specific TMP serial variant, review our detailed service pages and parts listings:
Shimadzu molecular pump non-standard maintenance parts — replacement options and service referrals.
For ordering, technical drawings, or to request a quotation including lead time and shipping, please visit our product and service page:
Shimadzu molecular pump non-standard maintenance parts — contact details and order forms are available.
Note: If you require a matched rotor/stator set or prefer a full motor rebuild (recommended when bearings and rotors show wear), we offer rebuild services that include dynamic balancing and vacuum performance verification to restore the pump to OEM specification.
For urgent technical queries, please include your pump model and serial number (e.g., TMP‑3203, TMP‑2003, TMP‑3603) and any observed fault codes or symptoms so we can recommend the correct part and service path.
