TM 5-3895-346-14
PREVENTATIVE MAINTENANCE
ENGINE OVERHAUL
Figure 5. Item 8
Figure 6. Item 11
as changing filters every other oil change, should be based on a laboratory analysis of the drained oil and the
used filter elements to determine if such practice is practical for proper protection of the engine.
Make a visual check of ail lubricating oil lines for wear and chafing. If any indication of wear is evident, replace
the oil lines and correct the cause.
When the engine is equipped with a turbocharger, prelubricate it as outlined under Install Turbocharger in
XXXXXXXXXXXXX or XXXXXXX.
If the engine is equipped with a governor oil filter, change the element every 100 hours or 30,000 miles.
Check for oil leaks after starting the engine.
Item 11 Fuel Filter
Install new elements every 6 months or 10,000 miles (vehicle engines) and 300 hours or 9000 miles
(nonvehicle engines) or when plugging is indicated.
A method of determining when elements are plugged to the extent that they should be changed is based on the
fuel pressure at the cylinder head fuel inlet manifold and the inlet restriction at the fuel pump. In a clean
system, the maximum pump inlet restriction must not exceed 6 inches of mercury (20.3 kPa). At normal
operating speeds, the fuel pressure is 45 to 70 psi (310 to 483 kPa). Change the fuel filter elements whenever
the inlet restriction (suction) at the fuel pump reaches 12 inches of mercury (41 kPa) at normal operating
speeds and whenever the fuel pressure at the inlet manifold falls to 45 psi (310 kPa).
Item 12 Coolant Filter
If the cooling system is protected by a coolant filter and conditioner, the filter element should be changed every
6 months or 10,000 miles (vehicle engines) and 500 hours or 15,000 miles Figure 6. Item 11
435
