Mitsubishi S12R-T2MPTK Operation & Maintenance Manual page 89

Oil Filter - Replace While Engine is Running
If the engine cannot be stopped when oil filter change
interval has been reached, the oil filter can be
replaced while the engine is running by turning the
switchover cock located between the oil filters.
Note: (a) Normally, the engine must be stopped when
replacing oil filters.
Only if the engine cannot be stopped at any
cost, replace the oil filter by following the in-
structions below.
(b) Place a tray to catch oil flowing out during fil-
ter replacement, as a small amount of oil may
leak from filter mounting portion on the
stopped side.
When replacing oil filters during operation, be sure to
decrease engine speed to low idle.
Do not replace two or more filters at the same time.
1. Remove the switchover cock cover.
2. Turn the switchover cock so that the switchover
cock pin faces to the filter replacement position
(right side).
This stops the engine oil supply to the filter.
3. Replace the oil filter.
4. Place the switchover cock in the operating position.
5. Install the switchover cock cover.
Chapter 8 PERIODIC INSPECTION AND MAINTENANCE PROCEDURES
Fig. 8-20 Oil Filter - Replace While Engine is Running
Filter
Operating
replacement
position
position
Oil filter
8-15