YOKOGAWA MC43 User Manual

<5. Maintenance>
5-2
IM 02M04B01-01EN
NOTE
• Controller is equipped with either a locally-
adjusted set point (set point knob, standard;
MC43-N-N) or a remotely-adjusted
set point (pneumatic set, optional; MC43-
C-P).
• If controller is equipped with optional
automatic-manual transfer system (MC43-
C-P).
a. Amplier is located as shown.
b. Air to automatic control system can be
turned off. If automatic control section
(amplier, restrictor, control unit, etc.)
requires servicing, controller can be
operated manually.
• For component connection identications,
refer to section 5.13.
5.3 To Clean Restrictor
Restrictor is screwed into base of amplier.
F0504.ai
Location of amplifier
WITHOUT auto-man
transfer system.
Location of amplifier
WITH auto-man
transfer system.
1
1. Unscrew restrictor. (With restrictor at right, use
offset screwdriver).
2. Clean with O.D 0.13 mm wire.
3. Before reinstalling restrictor, apply a thin lm of
Vaseline or similar lubricant to O-ring.
5.4 To Replace Pneumatic
Amplier
1. To remove amplier, remove two large screws
and pry off. A gasket is supplied with each
replacement amplier.
2. Do not remove plate between amplier and
manifold.
Illustrated is location of amplier in controller
without auto-man transfer system; for other
amplier location, see upper illustration.
5.5 To Replace Screens
3. If screens become clogged, pry out with a
pointed tool and replace.
NOTE
Filters are always located as shown regardless
of location of relay.

YOKOGAWA MC43 Specifications

General

Brand	YOKOGAWA
Model	MC43
Category	Controller
Language	English