Post by bobblehat on Nov 21, 2014 13:39:40 GMT -5
If anyone wants to try replacing the bearings on a 185's fan (and possibly some other models), here are a few pointers.
There are 2 bearings:
simplybearings.co.uk/shop/p2639/696A2Z+Metal+Shielded+Deep+Groove+Ball+Bearing+6x16x5mm+/product_info.html
simplybearings.co.uk/shop/p1382/Major+Branded+6262Z+Metal+Shielded+Deep+Groove+Ball+Bearing+6x19x6mm/product_info.html
The case is held together with silicone sealant so that when the screws have been removed, you have to prize it apart with a large flat blade screwdriver or similar.
Obviously, you will need to clean off the old silicone and apply new when reassembling.
The fan impeller is held on to the motor shaft with a hex headed grub screw. It's worth noting the axial position of the impeller before removal as it can foul the case on reassembly and take some considerable trial and error to get it in the correct place.
The motor is held to the casing by 3 screws behind the impeller. Make sure you note the orientation of the motor before removing it as it can go on in any of three ways and only one gives you the correct cable location to allow easy reconnection.
Once the motor is removed, take off the tiny circlip from the shaft. You will undoubtedly destroy it in the process, so make sure you order a spare when you get the bearings.
simplybearings.co.uk/shop/p82824/External+Circlip+6mm+Diameter+Un-Sprung+Dia+5.6mm/product_info.html
With the circlip removed, the shaft simply slides out. The bearings are not a tight fit can be pushed out from each end quite easily.
As the Haynes manuals say 'Reassembly is the reverse of disassembly', but the circlip is best fitted by forcing it over the end of the shaft and sliding it along into the groove.
Have fun and don't blame me!
There are 2 bearings:
simplybearings.co.uk/shop/p2639/696A2Z+Metal+Shielded+Deep+Groove+Ball+Bearing+6x16x5mm+/product_info.html
simplybearings.co.uk/shop/p1382/Major+Branded+6262Z+Metal+Shielded+Deep+Groove+Ball+Bearing+6x19x6mm/product_info.html
The case is held together with silicone sealant so that when the screws have been removed, you have to prize it apart with a large flat blade screwdriver or similar.
Obviously, you will need to clean off the old silicone and apply new when reassembling.
The fan impeller is held on to the motor shaft with a hex headed grub screw. It's worth noting the axial position of the impeller before removal as it can foul the case on reassembly and take some considerable trial and error to get it in the correct place.
The motor is held to the casing by 3 screws behind the impeller. Make sure you note the orientation of the motor before removing it as it can go on in any of three ways and only one gives you the correct cable location to allow easy reconnection.
Once the motor is removed, take off the tiny circlip from the shaft. You will undoubtedly destroy it in the process, so make sure you order a spare when you get the bearings.
simplybearings.co.uk/shop/p82824/External+Circlip+6mm+Diameter+Un-Sprung+Dia+5.6mm/product_info.html
With the circlip removed, the shaft simply slides out. The bearings are not a tight fit can be pushed out from each end quite easily.
As the Haynes manuals say 'Reassembly is the reverse of disassembly', but the circlip is best fitted by forcing it over the end of the shaft and sliding it along into the groove.
Have fun and don't blame me!