Heater blower

[reflexboy]

Thankfully, as it darn freezing, my blower motor works 100%, but it howls. The faster the fan speed, the more pronounced the howl. I have looked in my trusty Haynes manual and it seems easy enough to remove the motor and perhaps wd40 the spindle/bearings. Has anyone else had this problem?

 

[television]

Thankfully, as it darn freezing, my blower motor works 100%, but it howls. The faster the fan speed, the more pronounced the howl. I have looked in my trusty Haynes manual and it seems easy enough to remove the motor and perhaps wd40 the spindle/bearings. Has anyone else had this problem?

Tangencial type fans do put a loading onto the bearings of the motors WD40 is not a lubricant. if you can run the fan to get it hot, then engine oil is the thing to use, the bearings are phosphorus bronze, when hot they will absorb some of the oil, making a longer lasting job, the brush end is the worst affected

 

[fredfloggle]

Tangencial type fans do put a loading onto the bearings of the motors WD40 is not a lubricant. if you can run the fan to get it hot, then engine oil is the thing to use, the bearings are phosphorus bronze, when hot they will absorb some of the oil, making a longer lasting job, the brush end is the worst affected

To add to what Malcolm said - if the bearing cages can be removed then you can boil the bearings in oil :-

Lubrication
Standard OILITE bearings are impregnated with a highly refined mineral oil to ISO VG (SAE 30) having a high viscosity index and containing antioxidant, anti-rust and defoamant additives. A replenishment of oil should be carried out after 1000 hours of use or yearly These intervals can be extended for bearings with relatively thick walls and shortened for low porosity bearings. Bearings running submerged in oil or in oilsplash will not require replenishment. The standard operating range is -4°C to +70°C and a full range of special lubricants is available to cater for running temperatures from -6O°C to +200°C. To prevent possible seizures with stainless steel or hard-chromium plated shafts, an addition of molybdenum disulphide to the impregnation oil must be specified. Any particular application thought to be outside standard conditions should be referred to our Technical Department who can be contacted on (01484) 515054.
However, here are some basic rules:

• Low viscosity oil for low temperatures, high speeds or light loads
  
• High viscosity oil for high temperatures, low speeds or heavy loads
  
• High viscosity index oil for wide variations in operating temperatures
  
• Oxidation stable oils for long-period usage
  
• Oil with 'oiliness' additives for boundary conditions
  
• Oil of lesser 'oiliness' for full film (hydrodynamic) conditions
  
• Oil with Extreme Pressure (E. R) Additives for very heavy or shock loads

Re-oiling
After machining of the bearing, or following oil loss during storage, immerse in high quality mineral oil to ISO VG 68 or ]SO VG 150 (SAE 30 or SAE 40) at 8O°C to 1OO°C for 10 to 15 minutes and then cool in cold oil.