Servo And Emi/Electronics Assembly - ABB AV3 Instruction Manual

REPAIR/REPLACEMENT PROCEDURES
SERVO ASSEMBLY AND ELECTRONICS CIRCUIT BOARD
8 - 6
6. Remove the tubing (coming from the regulator) from the bottom
of the rear tee connector on the servo assembly (Fig. 8-4).
M O U N T IN G SC R E W S
R E AR T EE
C O N N EC TO R
(BE H IN D BE LLO W S,
N O T SH O W N )
T EE C O N N EC TO R
Figure 8-4. Servo and EMI/Electronics Assembly
NOTE: When removing tubing from barb fittings do not
reconnect the same tubing to fittings until you have clipped
and discarded the end of the tubing that was connected to
the fitting. This is required because the fittings often tear
loose particles of the tubing. This can cause blockage in the
air lines.
7. Remove the servo motor lead connector from the EMI/electronics
board.
8. Remove the three screws securing the EMI/electronics housing
to the servo assembly.
NOTE: When replacing, do not over tighten the screws that secure
the EMI/electronics to the servo assembly. Tighten these screws just
until they become tight or snug.
9. If replacing the servo assembly, reverse the preceding steps. If
replacing the electronics circuit board, perform Steps 10 through 12.
10. Remove the two nuts and one screw (item 68, Figures
through 9-6) securing the EMI/electronics housing cover. Remove the
cover from the housing.
SE RVO
M O TO R L EAD
PR ESS U R E
T R AN S D U C ER
T 00 33 7 A
9-1