Komatsu 830E-AC Shop Manual page 891

The reserve engine oil system is designed to add
more oil capacity to the engine sump and to reduce
frequent servicing of the engine oil. The constant cir-
culation 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 periods. The system adds or removes oil
from the engine as required to maintain a constant
level which prevents over fills or under fills.
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 ser-
vicing. It also gives an added level of oil cleanup.
The normal supply system capacity of oil carried in
the reserve tank is roughly equivalent to the volume
in the engine. In the process of continuous adjust-
ment of the engine oil level, there is a constant circu-
lation 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 possible, 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 consideration
before determining permissible oil life.
M31004
RESERVE ENGINE OIL SYSTEM
Reserve Engine Oil System
FIGURE 31-1. OIL RESERVE TANK
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
8. Tank Fill Cap
9. Reserve Tank
10. Engine Add Line
11. Pumping Unit
12. Sight Gauge
13. Tank Add Line
14. Filter
M31-3