Maintworld 3/2019

APPLICATION
develop your PM strategy you need to
decide who will do cleaning and how you
will train them to do it. Training documents
and reference guides should detail
both the “Why” and “How” of cleaning
equipment.
Inspections
Back to that client- when we looked at
the inspection routes and PM work orders
in place, we saw they put some good
thoughts into documenting Essential
Care and Condition Monitoring for some
of the equipment. Still, there were many
vague inspections such as, “Inspect
motor”. One of the maintenance technicians
showed us the PM work order and
his written comments, “The motor is
still there!” Humour is great, but details
are needed on what to inspect, how and
where to measure, and the acceptable
range.
Train people doing inspections to understand
the principals of how the motor
and coupling works, and the basic failure
modes for key components like the bearings
and the windings. Also, train them
how to use the inspection tools. If you
document and describe these inspection
instructions on a PM route or a work
order you will get consistent execution of
your PM task.
The maintenance department was
focused on doing vibration analysis and
electrical dynamic and static testing of
larger AC motors. But they were still
having issues with AC motor failures.
We performed a Root Cause Problem
DEFINITION:
PREVENTATIVE MAINTENANCE.
All maintenance done to prevent a
failure (life extension) and detect a
failure early (Condition Monitoring)
before it impacts the process.
Elimination investigation and found the
failures were due to either over or under
lubrication.
Did they need to focus on detecting
the bearing going bad before attempting
to make sure the bearings had the right
lubrication?
Do PM’s on the AC motors as long as
it is cost effective, i.e. Condition Based
Maintenance costs less than Operate to
Breakdown. Based on our PM evaluation
we found the client should do both: the
right lubricants, at the right time, the
right amount, and have vibration analysis
to provide both Essential Care and
Condition Monitoring.
As time passed with our assistance the
client developed PM inspections with
the right frequency, trained the inspectors,
and executed them on time. The
PM inspections generated quality work
requests that were turned into work
orders for Corrective Maintenance and
was planned and executed according to
the schedule.
And they were making
progress until…summer!
During summer holiday we noticed
the PM compliance went from over 90
percent to less than 20 percent and this
went on for several months after the
vacation season ended. An effective PM
program requires good processes, documentation,
tools, and execution of task.
The discipline to continue the program
had not been anchored in our client’s organization.
We determined that the leadership
team in Operations and Maintenance
needed to be more involved to
ensure that processes are executed, and
compliance is reported.
Preventative Maintenance needs to
be executed according to the schedule
despite vacation season, deer hunting
season, or moose hunting season. What
season will decrease the efficiency of
your PM program?
PREVENTATIVE MAINTENANCE NEEDS TO BE EXECUTED
ACCORDING TO THE SCHEDULE DESPITE VACATION SEASON,
DEER HUNTING SEASON, OR MOOSE HUNTING SEASON.
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