Chapter 6 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES
6-8
Changing Oil Filters (Swithover Type) (S12U)
Inspect the damage of the drain plug and filter bracket threaded sections, the center bolt and the gasket, if
any damage are found, replace it with the new one.
Changing Oil Filters with Engine Stop
Refer to "Changing Fuel Filters (Center-Bolt Type)" (6-3) for the procedure for changing oil filter element.
Changing Oil Filters While Engine in Operation
To replace the oil filters while the engine is in operation, be sure to run the engine under no load low idling and
rated speed. If the oil filter is replaced during the engine is in high-speed operation, oil can leak from switcho-
vwe lever.
1 Clean the surrounding area of the oil filters.
2 Place a container under the oil filters to receive
drained oil.
3 Remove the cover from the oil filter switchover
cock.
4 Turn the switchover cock to have pin position
“Left-Close, Right-Open”.
5 Refer to "Changing Oil Filters (S12U)" (6-7) for
the procedure for changing 3 new sets of left oil
filter elements.
6 Turn the switchover cock to have pin position
“Right-Close, Left-Open”.
7 Refer to "Changing Oil Filters (S12U)" (6-7) for
the procedure for changing 3 new sets of right
oil filter elements.
8 Return the switchover cock pin to the NORMAL
position and reinstall the cover to the switchover
cock.
fig.6-13 Changing oil filters (switchover type)
Open both sides
of oil filter
Right-CLOSE,
Left-OPEN
Left-CLOSE,
Right-OPEN
"NORMAL
position"
Right side oil filters
Left side oil filters
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