Owner's manual

SECTION VII. CORRECTIVE MAINTENANCE
7-1. OVERVIEW. This section describes corrective
maintenance for the Rosemount PP405TR Power
Positioner. If specific cause of problem is not known,
refer to Section V, Troubleshooting. Spare parts
referred to are available from Rosemount. Refer to
Section VIII of this manual for part numbers and
ordering information.
WARNING
Before performing any maintenance or
repair action on power positioner, shut off
supply air, signal air, and any electrical
supply or electronic sighals to power
positioner. Isolate power positioner from aU
systems connected to the power positioner.
Severe injury or death may result from
large torque power positioner is capable of
producing, or from electrical shock.
7-2. PARTS REPLACEMENT.
a. Air Filter. Regularly inspect disposable filter
element as needed, according to plant air supply
quality. If filter element needs to be replaced,
new elements are available from the factory. Use
the following prwedure to replace filter element
1. Remove power positioner from service and
close supply air shut off valve.
2. Open air filter’s drain valve (1, Figure 7-1)
and bleed off any air pressure and moisture
remaining in system.
3. Remove air filter’s sump (2) by removing
cap nut (3) and cap nut gasket (4) on top of
air filter. Save cap nut gasket for
installation.
4. Remove used filter element (5) by grasping
and pulling it downward.
5. Install new filter element (5).
6.
7.
8.
Install air filter sump (2) into filter housing
(6). Secure sump with cap nut (3) and cap
nut gasket (4).
Open supply air shut off valve and check for
leaks.
Return system to service.
ITEM DESCRIPTION
1 Drain Valve
2 Sump
3 Cap Not
4
Cap Nut Gasket
5 Filter Element
6 Filter Housing
Figure 7-1. Air Filter