MAINTENANCE OF THE M88A1 - OD1672 - LESSON 2/TASK 1
It is valuable for maintenance personnel to inquire about the conditions
under which the M88A1 recovery vehicle has been operated. Knowing this will
help unit maintenance personnel to determine the proper strategy for
troubleshooting a malfunction.
It is further understood that there are
various troubleshooting, maintenance, adjustment, and repair functions that
can be performed on the various systems and components of the M88A1 recovery
vehicle. In this task, we will provide one example of these functions for
the cooling, fuel, air intake, and exhaust systems.
subparagraphs discuss the troubleshooting, maintenance, adjustment, and
repair of these systems' components based on a specific malfunction
maintenance, adjustment, and repair of this system, specifically: HIGH
ENGINE OIL TEMPERATURE.
During the troubleshooting procedures, unit
maintenance personnel would check: (1) for proper oil level in the engine
crankcase, and ensure the oil is not diluted; (2) the engine air intake
grille openings for restrictions; (3) the oil cooler screens and air
passages for restrictions; (4) the oil cooler lines for kinks and twists;
(5) the oil coolers and oil cooler lines by operating the engine at
approximately 200, and cautiously feeling the oil, oil cooler lines for
overheating, and the oil coolers for being only warm instead of hot; (6) the
cooling fans for proper operation.
As a result of this troubleshooting process, it is discovered that the
cooling fans are not operating properly and must be replaced.
procedure for replacement of these fans is identical for both fans, only the
replacement for one fan will be discussed. For the purpose of this task, it
is assumed that the engine is installed in the hull of the vehicle and that
the engine deck has been removed.
The following maintenance, adjustment,
to figure 21 on the following page, views A and B, during the discussion of