4) Measuring tension 1 Lower indicator arm (1) into the scale. Apply tester to belt at a point midway between two pulleys so that edge of contact surface (2) is flush with the V- (1) belt. Slowly depress pad (3) until the spring can be heard to disengage. This will cause the indicator to move upwards. If pressure is maintained after the spring has disengaged a EA6O6011 false reading will be obtained! 2 Reading of tension Read of the tensioning force of the belt at the point where the top sur- (3) face of the indicator arm (1) inter- sects with the scale. Before taking readings make ensure that the indicator arm remains in its position.
(2) EA6O6012 (5) Tensioning and changing V-belt Remove fixing bolts. (1) Remove lock nut. (2) Adjust nut (3) until V-belts have cor- rect tensions. Retighten lock nut and fixing bolts. To change the V-belts loosen mounting bolts (1) and lock nut (2) and push ten- sion pulley inwards by turning adjust- ing nut (3). - 173 - MAINTENANCE OF MAJOR COMPONENTS Type Drive belt width Tensioning forces on the tester new installation When s After 10 min. Installation long r running time ervicing after unning time Installation M 9.5 mm 50 kg 45 kg 40 kg A 11.8 mm 55 kg 50 kg 45 kg B 15.5 mm 75 kg 70 kg 60 kg C 20.2 mm 75 kg 70 kg 60 kg (2) (1) (3) (1) (1) EE6OM024