Disassembly Method Of Tubular Motor

For B2B installers and facility managers, pulling a failed tubular motor is usually the easy part. The real cost hits when you damage the drive adapter, warp the limit switch, or void the warranty by cutting the wrong cable.

Here is the field-tested SOP to get the unit out fast, keep components reusable, and get the system back online.

 

Skip the guesswork. Have metric and imperial hex keys on hand-European drives differ from US custom builds. Keep a rubber dead-blow hammer nearby. Never use steel; a seized motor needs a soft tap to break thermal expansion without deforming the output shaft.

 

Don't just flip the wall switch. Isolate the circuit at the main distribution board and apply a personal padlock. Wait 10 minutes after disconnect-internal capacitors hold a charge long enough to fry a control board or cause arcing if rushed.

Always remove screws at the crown (limit switch side) first, not the drive side.
The critical move here is the drive wheel connection. Many units use a plastic spline adapter. Never use a pry bar between the motor head and the drive plate. This distorts the limit switch dogs. Instead, wiggle the motor laterally to slide it off the drive ring.

 

Take a high-res photo of the terminal block before touching anything. Label mains (L/N) and control wires (com/s1/s2).
Warranty warning: Disconnect at the junction box-never cut the pigtail close to the housing. Most manufacturers (Becker, Elero, etc.) void the warranty immediately if the factory cable is shortened.

 

Do not pull the motor straight out; this strains the internal stator.

Rotate the motor body 90 degrees first to relieve tension on the internal braking spring.

For retaining pins: use a pin punch, not pliers. Pliers chew the heads, making reinsertion a battle.

For C-clips: apply anti-seize spray (not WD-40) and wait 60 seconds. Forcing a corroded clip snaps it, leaving the motor to oscillate and fail prematurely upon restart.

 

How you store parts determines your callback speed.

Control boards and RF receivers go straight into anti-static bags. Laying them on a metal bench invites ESD damage-leading to ghost failures after reinstallation.

Log the serial number before bagging the unit. We find 70% of "failed" returns actually have faulty external relays. Tracking batch numbers helps your procurement team decide if it is a factory return (RTS) or a simple depot repair.

The Bottom Line:
Treat the drive adapter, limit housing, and PC board with surgical precision. Salvaging just 60% of components from a failed unit drastically cuts your spare parts budget. If you are facing a seized adapter or need drop-in compatible replacements for major EU/US brands, contact our team-we supply hardware that fits without modifying your existing brackets.

Stay safe, protect the gear train, and log the serial.