The document provides instructions for servicing the Xomed Magnum II Straightshot handpiece. It describes opening the handpiece by removing two Allen screws to separate the two halves. Both halves should then be cleaned thoroughly with WD40 and a brush to remove debris. The gears should be lubricated with silicone grease. For more extensive repairs like changing bearings, additional disassembly of the motor is required by removing small C-clips, gears, and a pin. Drilling out small rivets is necessary to access the bearings inside the motor casing. Proper lubrication and cleaning helps ensure smooth operation of the handpiece.

1. Servicing the Xomed Magnum II Straightshot Dr Ramandeep Singh Virk Asst Prof Dept of ENT PGIMER Chandigarh, India

2. The generations of XomedHandpieces....MAgnum, MAgnumII and Magnum 4 or M4 as its known...notice the size of the barrel...the Magnum had a smaller motor and was hence thinner....the middle one is MagnumII with a bigger motor and thicker

3. notice where the suction tube attaches is a bent pipe...this is one of the reasons that this port gets clogged with blood and debris and is difficult to clean because of the angulation....WD40 with a curved brush is very helpf

4. notice the 2 screws...they are Allen screws and need an Allen Key to open.....

5. I use a 2.5mm metric Allen key...if you have a screwdriver with allen bit its soooo easy.....allens come in metric and US sizes...good to have both cos sometimes if the head of the screw strips then we can use the US size one....slight size difference but fits perfectly

6. opening the screws.....

7. both Open both screws and pull apart....some manipulation is needed since gears are engaged inside

8. Both ends seperated

9. I have already serviced this handpiece but opened it again for the forum to post pics...you will notice loads of clots and debris and rust here......look carefully and you can see the areas where cleaning has been done...some brown red residue still remains

10. This is the other side...notice the bearing above the gear...this is the suction outlet...if this bearing fails your debrider is leaking blood and water into the gears.....

11. My bearing has started to rust around the edges......the top one.....(lower is the gear)

12. Cleaning tools....a brush(motorised....use my kiddos) and WD40

13. Spraying WD40 liberally

14. Clean with a brush

15. Clean other side with WD40 and a brush

16. Use silicone grease to lubricate the gears....(same as the one we use for gears of RC Cars)

17. Grease applied to both the gears

18. Now this is the tricky part for a bearing change....DO ONLY IF YOU ARE CONFIDENT ENOUGH....Please dont blame me for lost small parts etc later :-) Unscrew the rear end which is connected to the main barrel

19. the motor comes out

20. there is a pin which holds the motor with the main black wire.....you can see the holes through which the pin goes

21. The front end seperates and you will see 3 small gears C clips etc which have to be removed

22. This is where the pin goes

23. after removing the pin the motor separates but still connected with wires

24. XOmed is SMART....wires are covered with epoxy putty so we cannot see the coding and which wire goes where......SMART....very smart

25. To reach the bearings there are small rivets which they seal the motor can with.....you need to drill them out......if you have a friend or patient who owns a tooling shop it help.....luckily I do....inside you will find the bearings.....if they are burnt order new ones and change em.........and ur good to go......