Cam - ABB AV3 Instruction Manual

CAM

Tools required
REPAIR/REPLACEMENT PROCEDURES
11. Carefully remove the circuit board from the housing. Determine
which type of electronics circuit board you are replacing (AV3 or AV4)
and perform the appropriate lettered step:
a. AV3: Use a thin-bladed screwdriver to carefully pry the black
wire connector from P1 and the red wire connector from P2 of the
electronics circuit board.
b. AV4: Use a thin-bladed screwdriver to carefully pry the black
wire connector from P1 (lower), the red wire connector from P2
(+ 24) and the white wire connector from P3 (raise) of the elec-
tronics circuit board.
12. To replace the circuit board and servo assembly, reverse the pre-
ceding steps.
13. Transfer the positioner back to automatic operation (refer to
Section 5).
(Item numbers reference Figures
Flat-tip Screwdriver
Adjustable Wrench
Pliers
1. Transfer the positioner from automatic to manual operation (refer
to Section 5).
2. Remove positioner cover, by removing two cover screws.
3. Remove indicator screw (item 51) and indicator (item 19).
4. Hold and stop the cam shaft from rotating if it is not secured by
linkage or coupling. Using the adjustable wrench, remove cam nut
(item 30) and washer (item 55).
5. Lift cam from cam shaft.
6. To replace cam, determine which cam mounting hole (A, B or C)
is appropriate for application, and set cam on shaft. Make certain
star-shaped hole engages squarely on shaft.
7. Replace cam washer and nut and tighten.
8. Set indicator on cam shaft and insert and tighten screw.
9. Transfer the positioner back to automatic operation (refer to
Section 5).
9-1 through 9-6.)
CAM
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