ENGINE MAINTENANCE
The 685D Motor Grader features a Cummins 3.8 Tier
4F diesel engine. Lockable engine access doors on
both sides of the grader allow convenient access to
components. The engine oil cap, dipstick and oil lter
are located in the right access door. (Figure 5-9)
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2
3
Figure 5-9. Engine Oil Cap, Dipstick and Filter
1 - Engine Oil Filler Cap
2 - Oil Dipstick
3 - Engine Oil Filter
Check Engine Oil
The engine lubrication oil must be kept at a level above
the ADD mark, but not above the FULL mark, on the
engine lubrication oil dipstick.
ALWAYS stop the engine before
checking the engine lubrication oil level as hot oil
can be thrown, causing serious injury.
Wait ve minutes after engine
shutdown before removing the dipstick from the
engine and checking the oil level to assure accuracy.
This also prevents lling the engine with too much
lubrication oil. Engine oil should be warm when
checked.
To accurately check the engine lubrication oil level, park
the machine on a level surface and stop the engine:
1. Clean around the engine lubrication oil dipstick
before removing it from the engine. (Figure 5-9)
2. Removing dipstick from the engine, wipe with a
clean cloth, then reinsert.
3. Pull dipstick out of the engine and check that oil
level is near the full mark on the dipstick.
4. To add oil, remove the ll cap located next to the
dipstick. Twist to remove cap and twist to install (use
15W40 motor oil).
Change Engine Oil and Filter
The engine lubrication oil and oil lter must be changed
at the same time. (Figure 5-9)
DO NOT change the engine lubrication
oil lter while the engine is running. Serious engine
damage will occur.
To change the engine lubrication oil:
1. Park the machine on a level surface and turn off the
engine.
Change the engine lubrication oil
while the engine is WARM, not hot. Hot oil can cause
serious personal injury.
2. If needed, wait until the engine lubrication oil has
cooled a little. Oil should be warm, not hot.
3. Place a container large enough to hold 15.4 quarts
(14.6 liters) of oil underneath the drain hose.
4. Remove cap on drain hose (at rear of axle) and
drain all engine oil into the container.
5. After all the oil has drained, reinstall the oil plug.
6. Wipe the area around the oil lter and its mounting
base with a clean cloth.
7. Place the empty container under the lter element.
8. Use a lter removal wrench to remove the lter,
turning counterclockwise.
9. Wipe inside the oil lter head using a clean, lint-free
cloth.
10. Rub a little oil on the rubber gasket area of the new
lter element.
11. Fill the new lter with fresh oil.
12. Install the new lter element onto the lter head.
Carefully tighten the lter (by hand only).
13. Fill the engine with 15.4 quarts (14.6 liters) of oil at
the oil ll cap.
14. Check oil level using the oil dipstick. Add more if
needed.
15. Dispose of used oil in accordance with local and
federal environmental laws.
NOTE: Discard the used rubber gasket with the lter
element.
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Maintenance
LeeBoy 685D Motor Grader 5-13
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