Metos RN 20, Service Manual

Page: 19 / 59

5.10.2004 Rev. 1.0
Service
13
When the lower fork 15 and the spring 34 are
mounted, the speed selector lever 8 is turned
counter clockwise, so that it points horizontally
backwards, at the same time as the lower fork is
pressed gently down. When the speed selector
lever 8 is now turned clockwise, it will catch the
toothed rack 35 and pull down the lower fork.
Screw on the nuts 11 and 12.
Be aware that the pin 39 on the lower part 32 of
the pulley set is to be placed as shown in the
above mentioned drawing.
When everything has been mounted, the speed has to be adjusted.
Adjustment of speed:
• control and if necessary adjust the distance B=318+/-3mm, by loosening the four
bolts 16 and move the motor backwards and forwards. The tolerance of the dis-
tance B can be used in cases when there are problems in adjusting the speed cor-
rectly, as the distance B is dependent on the tolerance of the special V-belt
• the counter nut 11 and the adjusting nut 12 are loosened
• start the mixer and adjust the lowest speed so that the special V-belt 7 is approx.
1-2mm C from the pulley edge
• stop the mixer and tighten loosely the adjusting nut 12, and thereafter the counter
nut 11
• the counter nut 13 and the adjusting screw 14 are loosened
• start the mixer and adjust the highest speed so that the special V-belt 7 is approx.
1-2mm C from the pulley edge of the motor pulley set 9
• stop the mixer and tighten loosely the adjusting screw 14, and thereafter the coun-
ter nut 13