Komatsu 830E Shop Manual page 655

The Reserve Engine Oil System is designed to add
more oil capacity to the engine sump and to reduce fre-
quent servicing of the engine oil. The constant circula-
tion of oil between the engine sump and reserve tank
(9, Figure 31-1) increases the total volume of working
oil. This dilutes the effects of contamination and loss of
additives and maintains the oil quality over longer peri-
ods. The system adds or removes oil from the engine
as required to maintain a constant level which prevents
over fills or under fills.
A filter (14) in the supply circuit protects the pumping
unit (11) and prevents transfer of contaminants to the
engine sump which might enter the tank during servic-
ing. It also gives an added level of oil cleanup.
Extend oil change intervals
The normal supply system capacity of oil carried in the
reserve tank is roughly equivalant to the volume in the
engine. In the process of continuous adjustment of the
engine oil level, there is a constant circulation of oil
between the engine and the reserve tank. The volume
of oil in the tank becomes part of the working oil for the
engine. Oil change intervals may usually be extended
in proportion to the increased working oil volume.
Extension beyond a proportional increase is often pos-
sible, but should be undertaken only as determined by
oil sampling and analysis. Local conditions such as
engine application, climate and fuel quality should be
taken into account in determining permissible oil life.
M31001
Reserve Engine Oil System
1. Suction Line
2. Remote Fill Line
3. Fill Valve
4. Engine Add Line
5. Fill Switch
6. Air Relief Valve
7. Tank Fill Line
Reserve Engine Oil System
FIGURE 31-1. OIL RESERVE TANK
8. Tank Fill Cap
9. Reserve Tank
10. Engine Add Line
11. Pumping Unit
12. Sight Gauge
13. Tank Add Line
14. Filter
M31-1