Owner's manual

6-1.
6-2.
SECTION Vi. PERIODIC MAINTENANCE
OVERVIRW. Thii section describes preventive
maintenance for the Rosemoont Model PP405TR
Power Positioner. Preventive maintcnancc is
necessary at specific intervals to reduce wear and tear
on the power positioner.
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 death may result from
large torque power positioner is capable of
producing, or from electrical shock.
MAINTENANCE SCHEDULE, Use the
maintenance schedule, Table 6-1, as a guideline for
preventive maintenance. The frequency of this
maintenance varies directly with plant conditions and
operational load. Extremely dusty conditions or high
temperatures will require more frequent maintenance
to the power positioner.
WARNING
Clean power positioner in a well ventilated
area. Avoid inhalation of solvent fumes and
prolonged exposure of skin to cleaning
solvent. Follow ail instructions on the
Material Safety Data Sheet (MSDS) of the
solvent being used. Severe injury or death
may result from improper use.
6-3.
6-4.
GENERAL CLEANING AND LUBRICATION.
Clean power positioner’s exterior of all grease build
up with commercial dry cleaning solvent. To lubricate
power positioner,
use McLobe. MO&793 or
equivalent and refer to Figure 6-1, Lubrication Chart.
McLobe MO&-793 can be purchased from Rosemount
Analytical Inc. (part #183512) or directly from the
manufacturer:
McGee Industries, Inc.
9 Crozerdle Rd.
Aston, PA 19014
PILOT VALVE CLEANING AND INSPECTION.
In normal service, pilot valve assembly requires
cleaning and inspection at intervals of approximately
six months, or upon any indication of sticking.
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 death may result from
large torque power positioner is capable of
producing, or from electrical shock.
a. Remove power positioner from service.
Table 6-1. Maintenance Schedule.
TIME INTERVAL
(Approximate)
6 months
6 months
6 months
2Yc=s
2Ym
MAINTENANCE ACTION
Perform general cleaning and lubrication. Refer to paragraph 6-3.
Clean and inspect pilot valve. Refer to paragraph 6-4.
Clean and drain air filters. Refer to paragraph 6-5.
Clean and inspect diaphragm. Refer to paragraph 6-6.
Lubricate and clean cylinder and piston assemblies. Refer to paragraph 6-7.