Komatsu 830E-AC Shop Manual page 664

FILTER ELEMENT REPLACEMENT
Relieve pressure before disconnecting hydraulic
and other lines. Tighten all connections before
applying pressure.
Hydraulic fluid escaping under pressure can
have sufficient force to enter a person's body by
penetrating the skin and cause serious injury and
possibly death if proper medical treatment by a
physician familiar with this injury is not received
immediately.
Removal
1. With the key switch OFF, allow at least 90 sec-
onds for the accumulators to bleed down.
2. Remove bleed plug (11, Figure 3-18). Remove
bottom plug (13) and drain oil from the housing
into a suitable container.
Take care to avoid contact with hot oil if truck
has been operating. Avoid spillage and contami-
nation!
3. Loosen setscrew (8). Remove bowl (10).
4. Remove filter element (9).
5. Remove and discard backup ring (7) and O-ring
(6).
6. Clean bowl in solvent and dry thoroughly.
L3-20
Installation
1. Install new element (9). Install new O-ring (6)
and backup ring (7).
2. Install bowl on filter head and tighten. Lock in
place with setscrew (8).
3. Install bottom plug (13), and bleed plug (11).
INDICATOR SWITCH
The indicator switch (5, Figure 3-18) is factory preset
to actuate at 241 kPa (35 psi). When activated, the
switch will illuminate the amber Hydraulic Oil Filter
warning lamp located on the overhead display panel
in the operator's cab.
Note: Excessive restriction in either the hoist circuit
filter, or the steering circuit filter element will cause
the Hydraulic Oil Filter warning lamp to illuminate.
Hydraulic Component Repair L03039