Thread Number: 10863
Classic Royal Motor and Fan Upgrades
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Post# 117377   12/7/2010 at 06:34 (3,498 days old) by KirbyClassicIII (Milwaukie, Oregon)        

kirbyclassiciii's profile picture

Is it possible to upgrade a Royal metal upright motor from a 3 amp one to a 6 or 7 amp one? If so, please tell me what model(s) you have in which you attempted such a conversion.

Say you have an 880 from the 1970s with a 3 amp motor. It went to 4.5 amps for 1982, and finally to 5.4 amps in 1985, and remained as such until its mid-1987 replacement by the 886, which had a 6 amp motor. Again, is it possible to upgrade a 350 watt/400 watt/3 amp motor to a 6 amp or 7 amp one?

These are the non-drop-in motors I am referring to.

History of Royal metal upright motors:
350 watts = 1946 to 1970
400 watts = 1970 to 1975
3 amps = 1975 to 1981
4.5 amps = 1982 to 1984
5.0 amps = 1987 to 1995 (654, 655, 656, 882, 885)
5.4 amps = 1985 to 1987 (last 608, 880)
6.0 amps = 1985 to 1991 (618, 360/380/660/680, 886, 6103)
7.0 amps = 1990 to 1995 (670/690, 994, 996, 9700)

In addition to general motor assembly upgrading, is it also possible to switch from the original 6-blade impeller fan (R-053004) to a 9-bladed one (R-608004 or R-608005 depending on age of unit)?

Thank you,


Post# 117463 , Reply# 1   12/7/2010 at 18:19 (3,498 days old) by animebsd ()        
hey ben!

yes i had an 880 a while back and i upgraded the motor.

i do not recall what motor it was off of but i do remember it was
6 amp made it have alot more power

its fairly strait forward too.

just like the royal you will get on the 12th
its got a 6 amp in it

Post# 117816 , Reply# 2   12/11/2010 at 14:13 (3,494 days old) by djtaylor (Salt Lake City, Utah)        
Royal upgrade

djtaylor's profile picture
I know I should know this, but to you just take out the motor and swap it around? I have an old red Supreme Electro Hygene I think mdl #906?. It's too weak for me at 3 amps. Does anyone have a 5 amp motor to sell or trade?

Post# 117891 , Reply# 3   12/12/2010 at 14:17 (3,493 days old) by KirbyClassicIII (Milwaukie, Oregon)        
For djtaylor

kirbyclassiciii's profile picture
Your EH would most likely be a model 903, which is similar to Royal's 880, just as the EH 980 is similar to the 888.


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