Hofmann ATC 900 - 8.4 Gear box: check and replacement

CTC-CEN Service Manual 07-13 Rev.E
80
8.3 HORIZONTAL ARM ROLLERS # EAA0347G76A: CHECK AND ADJUSTMENT
 : 30’
 : End keys 13mm, allen keys 4mm.
 : Incorrect rollers adjustment may cause the following malfunctions:
1. Excessive play on the horizontal arm.
2. Horizontal arm does not move smoothly.
TO CHECK THE ROLLERS:
 Remove the horizontal arm protection.
 Unlock the horizontal arm cylinder.
 Unlock the counter nuts and then loosen the set screws to release the rollers.
 Unlock completely the front and the rear rollers
 Rotate the rollers and check if they are worn out or damaged
TO ADJUST THE ROLLERS:
 Tighten all 4 setscrews until to block the horizontal arm. Then turn back every one of ½ of a turn to get the
horizontal arm free again.
 Now make a fine adjustment tightening or loosening of 1/8 of a turn every setscrew.
 When the arm will move smoothly again and there will not be excessive play on the arm, lock the counter nuts.
 Mount the cover again.
8.4 GEAR BOX: CHECK AND REPLACEMENT
 : 2h
 : End keys 17mm, allen keys 4mm, Seeger pliers.
 : Incorrect gearbox may cause the following malfunctions:
1. Noisy rotation.
2. Low rotation torque.
3. Oil leaking.
TO CHECK GEARBOX:
 Turn the machine off.
 Remove the belt from the motor following par.5.4
 Turn the machine on.
 Run the motor: if it is run normally it means that the gearbox is noisy and must be replaced.
TO REPLACE THE GEARBOX:
 Turn the machine off.
 Loosen the 2 nuts and the screws of the center-post to release it.
 Remove the turntable center-post assembly.