NAVFAC P-300 Management of Transportation Equipment

NOTE: Amphibious Construction Battalions (PHIBCB) maintenance data for the
SLWT (Side-Loadable Warping Tug), CSP (Causeway Section, Powered),
and CSNP (Causeway Section, Nonpowered) will be performed and
reported under 3M system, DOD Equipment Maintenance Program.
Maintenance data for the ELCAS (Elevated Causeway) and ABFHS
(Amphibious Buoyant Fuel Hose System) remains reportable under this
publication.
4-2.3 PREVENTIVE MAINTENANCE
Preventive Maintenance Program. A dynamic preventive maintenance
(PM) pyogram reduces equipment downtime and disruption of work schedules caused
by equipment failures. Proper PM scheduling maintains uniform and balanced shop
workload and reduces the required work force. The scheduling system outlined herein
is the minimum prescribed standard for PM of all USN-numbered and USNG-numbered
equipment when operating under favorable conditions. The Maintenance Supervisor
determines when equipment requires more frequent inspections. Inspections are
critical for low-usage equipment such as equipment in a deadline or standby status.
Once the activity’s PM schedule has been established, deviations must be authorized
by the Maintenance Supervisor. The standard interval between PMs for NCF
equipment is 40 working days, based on a 5 day work week, with services performed in
accordance with manufacturer’s recommendations and specifications.
b. Preventive Maintenance Groups. Preventive Maintenance groups are
scheduling units in which all of an activity’s equipment is evenly distributed. Each
CESE item must be assigned to at least one PM group. The equipment should be
evenly distributed throughout 40 PM groups so that a minimum number of similar items
are out of service at any one time. Normal grouping should work like this: 1 of 10
dump trucks in the inventory should be assigned to very fourth PM group; 1 of 4 water
distributors should be assigned to every tenth PM group.
Equipment should be grouped so that units that normally work together are
scheduled for PM together; for example, semitrailers with truck tractors, and scrapers
with tractors. Units should initially use 40 PM groups. After the system is established
and operating, the Maintenance Supervisor should review its effectiveness and reduce
time intervals if necessary.
The PM frequency can be increased by reducing the total number of groups or
by assigning specific items of equipment to more than one group. For example, using
Table 4-2-1) assume the following situation: a base taxi is assigned to PM group 30
and enters the shop for a scheduled PM on 11 April. Upon inspection, it is found that
the taxi has accumulated more than the recommended miles since the last scheduled
PM on 11 February. The Maintenance Supervisor would then reduce the interval
between PMs by also assigning the taxi to PM group 10. Thus, the taxi receives the PM
twice as often. However, suppose that in 20 working days, when the taxi enters the
4-2-4