Komatsu 830E-AC Shop Manual page 710

STEERING CIRCUIT FILTER
The brake and steering circuit filter (Figure 5-22) is
located on the right, inside frame rail, behind the fuel
tank. The filter provides secondary filtering protection
for hydraulic oil flowing to the bleeddown manifold
valve for the steering and brake systems.
An indicator switch (1) is designed to alert the opera-
tor of filter restriction before actual bypass occurs.
The switch contacts close at 241 kPad (35 psid) to
actuate a warning lamp on the overhead display
panel. Actual filter bypass occurs at 345 kPad (50
psid).
NOTE: When the engine is initially started and the
hydraulic oil is cold, the warning lamp may actuate.
Allow the hydraulic system oil to reach operating
temperature before using the warning lamp as an
indicator to change the element.
Refer to Section P, Lubrication and Service for rec-
ommended normal filter element replacement inter-
val. Earlier replacement may be required if the
restriction indicator lamp turns on.
Premature filter restriction may indicate a system
component failure and signal a service requirement
before extensive secondary damage can occur.
NOTE: An early indication of the filter warning light at
first installation may be due to restriction in the filter
as it cleans the system. Unless the fluid appears
contaminated or has a strong foul odor, do not
change the oil; replace only the filter element.
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.
L5-26
FIGURE 5-22. STEERING/BRAKE CIRCUIT
1. Indicator Switch
2. Setscrew
3. Head
4. Bleed Plug
5. O-Ring
Steering Component Repair
FILTER
6. O-Ring
7. Filter Element
8. Bowl
9. O-Ring
10. Drain Plug
L05035