Hydraulic Tank Strainers - Komatsu 830E Shop Manual

Installation
1. Install hydraulic tank and secure mount caps
with capscrews and lockwashers. Tighten to
454 ft. lbs. (615 N.m) torque.
2. Uncap hydraulic lines and attach to the proper
connections.
3. Replace breather filters if required.
4. Fill the hydraulic tank with clean, filtered C-4
hydraulic oil. Refer to "Filling Instructions".
5. Bleed all air from hydraulic lines.
6. Bleed trapped air inside steering pump. Refer to
"Pump Pressure Setting", Section "L" for air
bleeding procedure.
NOTE: If trapped air is not bled from steering pump,
possible pump damage and no output may result.

HYDRAULIC TANK STRAINERS

Removal
Prior to opening the hydraulic tank, allow at least
90 seconds for the accumulator to bleed down
after engine shutdown with the key switch "Off".
1. Shut down the engine and the key switch "Off"
for at least 90 seconds.
NOTE: If the oil is to be reused, clean containers
must be used with a filtering (3-micron) system
available for refill.
2. Be prepared to contain approximately 238 gal.
(901 l) of hydraulic oil. Drain hydraulic oil from
tank at port on bottom of tank (2, Figure 3-17).
3. Disconnect hoist pump supply hoses at the tank.
(3).
4. Remove the 22 capscrews and lockwashers (4)
securing cover to the hydraulic tank. Remove
and discard gasket.
5. Remove capscrews and lockwashers securing
suction strainers. Remove suction strainers.
Inspect and Clean
NOTE: Inspect the strainers thoroughly for metallic
particles and varnish build up (if oil has been
overheated). The quantity and size of any particles
may be an indication of excessive wear of
components in the hydraulic system.
L03026 7/02
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.
Installation
1. Install suction strainers and secure in place with
capscrews and lockwashers. Tighten cap-
screws to standard torque.
2. Using new cover gasket, install cover and
secure in place using capscrews and lockwash-
ers (4, Figure 3-17). Tighten capscrews to stan-
dard 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
bleeding procedure
NOTE: If trapped air is not bled from steering pump,
possible pump damage and no output may result.
Hydraulic Component Repair
FIGURE 3-17. STRAINER REMOVAL
3. Hoist Pump Supply
4. Capscrews & Wash-
ers
L3-13