Komatsu 830E-AC Shop Manual page 662

FIGURE 3-17. STRAINER REMOVAL
1. Steering Pump Supply
2. Drain Port
1. Clean the strainers with fresh cleaning solvent
from the inside out.
2. Inspect the strainers for cracks or wear.
Replace, if necessary.
3. Clean any sediment from bottom of hydraulic
tank.
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3. Hoist Pump Supply
4. Cap Screws & Washers
Hydraulic Component Repair
Installation
1. Install suction strainers and secure in place with
cap screws and lockwashers. Tighten cap
screws to standard torque.
2. Using new cover gasket, install cover and
secure in place using cap screws and lock-
washers (4, Figure 3-17). Tighten cap screws to
standard torque.
3. Fill the hydraulic tank, refer to Hydraulic Tank
Filling Instructions. Open the three suction line
shut-off valves.
4. Loosen suction line connections at both pumps
to bleed any trapped air. Tighten hose connec-
tions.
5. Bleed trapped air inside steering pump. Refer to
Pump Pressure Setting, Section L for air bleed-
ing procedure
NOTE: If trapped air is not bled from steering pump,
possible pump damage and no output may result.
HYDRAULIC TANK BREATHERS
There are two breather filters (3, Figure 3-16) located
on top of the hydraulic tank to allow air in and out of
the tank. The filters should be replaced at the interval
specified on the lubrication chart.
Keep the area around the breather filters clean and
free of debris build up. If there is any sign that the
breather filters are oil soaked, replace the filters as
soon as possible and check for proper oil level. Once
the breather filters become oil soaked, they will plug
very quickly.
NOTE: Plugged breather filters can cause pressure
build up inside the hydraulic tank and can cause the
service brakes to drag.
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