Owner's manual

ITEM
6-l.
i.
i.
k.
I.
Fire 6-3. Diaphragm Exploded View
Making sum the diaphragm is not folded or
pinched, replace diaphragm cover (3) and align
sealing edge of diaphragm cover on top of
diaphragm.
Secure diaphragm cover (3) with socket head cap
screws (1) aad washers (2). Tighten alI scnws
hand tight. Then snag screws down and tinaRy,
complete installation by tightening in a
diagonal sequence. Torque screws to 11 foot-lbs
(1.52 kg-m).
WARNING
Before performing any maintenance or
repair action on power positioner, shut off
supply air, signal air, and any electrical
supply or electronic signals to power
positioner. Isolate power positioner from all
systems connected to the power positioner.
Severe injury or deatk may result from
large torque power positioner is capable of
producing, or fmm electrical shock.
Test for air kxkage around diaphragm cover and
receiver body. Use a leak detector, such as
“SlUWp”, and apply an air signal to power
positioner. If leak is detected, repair as necessary.
Return power positioner to service.
a. Remove power positioner from service.
6. Shut supply air valve and set signal air pressure
to 0 psig. Open bypass valve.
WARNING
CYLINDER AND PISTON. CLEANING AND
LUBRICATION. Disassemble, clean and lubricate
piston and cylinder assembly approximately every two
years. Refer to Figure 6-4 and use the following
procedure.
Residual air must be bled off of cylinder
before removal of cylinder head. If air is not
bled On, eye injury may result.
e. Bleed residual air through pilot valve supply air
connection.
m-m-204
6-5