Page 74 - Improving Machinery Reliability

46 Improving Machinery Reliability

efforts will become more precise if actual times-to-perform-tasks are catalogued in
this fashion.
Fully illustrated assembly and disassembly manuals are often routinely furnished
by first-class overseas machinery manufacturers. There should be ample incentive
for reputable vendors to express willingness to make similar instructions available to
interested users. By the same token, project staff representing the ultimate owner of
large, unspared turbomachinery should arrange for these illustrated manuals to be
produced.

Spare Parts Identification Sheets

Most major contractors are experienced in advising their clients on recommended
levels of spare parts procurement. These recommendations are generally reviewed
and translated into a spare parts warehousing system that assigns to all spares such
data as symbol numbers, reordering information, bin location, etc.
Among “etc.,” we found quality-control information most helpful. Critical spare
parts are identified with code letters indicating that the user’s inspectors should
check the parts at the point of origin or upon receipt at the user’s warehouse. This
procedure is bound to reduce the number of unpleasant surprises reported by petro-
chemical plants embarking on major tnachinery turnaround only to discover that
spare parts errors were about to delay completion of machinery turnarounds.
Spare parts identification sheets differ from conventional spare parts documenta-
tion or traditional storehouse information in a number of ways. They are primarily
intended as an aid to mechanics, machinists, and turnaround planners. These persons
require that spare parts information be contained on a single sheet, not in separate
catalogs or on computer printouts. In many cases, illustrations are required for posi-
tive identification of parts by personnel unfamiliar with either the machinery or the
storehouse routine.
To satisfy all of these needs, process plants should require machinery spare parts
information to be displayed as shown in the spare parts documentation sheet repre-
sented in Figure 1-32.
Major machinery spare parts documentation sheets must contain all the informa-
tion needed by the mechanical work forces to locate the parts in the storehouse.
These documentation sheets must allow mechanics, turnaround planners, and inspec-
tors to verify stock levels, critical dimensions, and suitability of parts. Cross refer-
ences and design-change and inspection information complete the sheet and make it
a stand-alone, highly useful document.

Lubrication Data
Pertinent data on manual as well as automated equipment lubrication must be
available well in advance of plant startup. Lubrication summaries are routinely pre-
pared by the contractor and range in format from simply restating the original equip-
ment manufacturer’s recommended lubricants to an intelligent consolidation of