172-65316M-08 (MB12A/MB12AF/MB12B/MB12BF) 7 Oct 2021
18
Disassembly/Reassembly
When disassembling or removing the product, wait until the internal
pressure equals atmospheric pressure and the surface of the product
has cooled to room temperature. Disassembling or removing the
product when it is hot or under pressure may lead to discharge of fluids,
causing burns, other injuries or damage.
CAUTION
Be sure to use only the recommended components when repairing the
product, and NEVER attempt to modify the product in any way. Failure to
observe these precautions may result in damage to the product or burns
or other injury due to malfunction or the discharge of fluids.
CAUTION
Make sure the power supply is OFF before carrying out work on the
wiring or inspections involving disassembly. If such work is carried out
with the power on, there is a danger that equipment may malfunction or
electric shock may occur, leading to injury or other accidents.
CAUTION
Use the following procedures to remove components. Use the same procedures in
reverse to reassemble.
(Installation, inspection, maintenance, repairs, disassembly, adjustment and valve
opening/closing should be carried out only by trained maintenance personnel.)
Detaching/Reattaching the Actuator Unit and Valve Unit
Part
During Disassembly
During Reassembly
Part Inspection
Allen
Screw
Remove with an allen
wrench
Coat threads with anti-
seize and tighten to the
proper torque
—
Spring
Washer
Remove the spring
washer
Reinsert spring washer
—
Actuator
Unit
Slowly pull actuator unit
up and off
Remount the actuator
unit
—
Connector Detach the connector
Reattach the connector
Check for deformation or
wear
Part: Allen Screw
Valve Size
Torque
Distance
Across Flats
mm
N∙m
mm
15 to 25
10
5
32 to 50
12
6
(1 N∙m
≈
10 kg∙cm)
Allen Wrench
Allen Screw
Spring Washer
Connector
Valve Unit
Actuator Unit