Koblenz/Thorne Electric UPRIGHT U-90 User Manual
Page 3
I.-FINAL TEST FOR PRODUCT SAFETY
At the completion of any repairs the product should be electrically tested for operating and electric
strength as follows.
1.-ELECTRIC TEST
1.
Set hi-pot test meter at 1500 Volts
2.
Lower product handle to “ON” position
3.
Place one probe of tester to one blade of the power cord plug and place the other probe to the
handle tube, there should be no breakdown.
2.-OPERATING TEST
Run the machine with the height adjustment knob on high position and check.
1.
There should be no unusual noise or vibration.
2.
The carbon brushes spark should be small and uniform.
3.
The current should not exceed 7.0 Amps
II. REPLACEMENT PROCEDURES
1.-TO REMOVE BAG
1.1.-Release spring, from handle, slide off coupling unit.
2.-TO REMOVE HANDLE TUBE (2 AND 8) FIG.1 AND FIG.3
2.1.-Pull out the line cord from the cord retainer (5)
2.2-Remove the nut and screw (14,15 AND 7) and pull out the tube.
3.-TO REPLACE BELT (49), FIG.2 AND FIG.4.
3.1.-Turn the upright upwards.
3.2.-Remove the bottom plate (23)and the fan cover by pressing and releasing one side of the retaining
shaft(22)
3.3.-Pull and twist the belt over the pulley to remove it.
3.4.-Pull the brush roll (21) from the ends to take it out of the chassis.
3.5.-First, place the new belt on the brush roll, then place brush roll in the chassis, put the belt on the
pulley verifying that the belt is in the right position,. Finally, assemble the fan cover and bottom plate.
4.-TO REPLACE BRUSH ROLL ( 21 ) OR BEARING SUPPORTS FIG. 2 AND FIG.4.
4.1.-Follow steps 3.1 to 3.4.
4.2.-Remove the supports by pulling them out.
4.3.-Replace the new brush roll as indicated in item number 3.5.
5.-TO REPLACE REAR WHEELS (5), FIG.2 AND FIG.4.
5.1.-Remove the cover(2) as described in procedure number 7.
5.2.-Pull washer cap retainer (6) from rear wheel hub (41) and remove the wheels.
5.3.-Replace the new wheels by placing the washers (9), the wheels as well as the padlocks.
5.4.-Place the cover back in position.
6.-TO REPLACE FRONT WHEELS (11), FIG.2 AND FIG.4.
6.1.-Remove cover (2) as described in procedure number 7.
6.2.-Remove screws (7) from the front axle retainer and the front axle spring (10).
6.3.-Take out front axle with the wheels.
6.4.-Remove the old wheel and place the new wheels..
6.5.-Replace the axle, the retainers and the spring.
6.6.-Place the cover back in position.
3 DECEMBER-10