Komatsu 830E Shop Manual page 422

HYDRAULIC TANK
Filling Instructions
NOTE: If filling is required, use only type C-4
hydraulic oil as specified on the truck Lubrication
Chart. Filtering of oil with a 3 micron filtering system
is recommended.
Prior to opening the hydraulic tank, allow at least
90 seconds for the accumulator to bleed down
after engine shutdown and keyswitch "Off".
1. With the engine stopped, body down, and the
key switch "Off", wait for at least 90 seconds.
2. Remove the fill cap (1, Figure 3-16) and add
clean type C-4 hydraulic oil until oil is at the top
sight gauge.
3. Replace fill cap.
4. Start engine, raise and lower the dump body
three times.
FIGURE 3-16. HYDRAULIC TANK
1. Fill Cap
2. Sight Gauges
3. Breather Filters (2)
L3-12
4. Drain Valve
5. Oil Sampling Drain
Cock
Hydraulic Component Repair
5. Continue to repeat steps 1 thru 4 until oil level is
maintained in the top sight gauge with the
engine stopped, key switch "Off", and body
down.
NOTE: With engine running and oil at operating
temperature, the oil should be visible in the lower
sight glass. If not, shut down engine and add oil per
"Filling Instructions". Minor adjustments to oil level
can be made by using the drain cocks (5) next to filler
neck.
If a hydraulic system component fails, an oil anal-
ysis should be made before replacing any com-
ponent. If foreign particles are evident, system
must be flushed. Refer to "Hydraulic System
Flushing" instructions.
Removal
1. Turn keyswitch "Off" and allow at least 90 sec-
onds for the steering accumulator to bleed
down.
Be prepared to contain approximately 238 gal. (901
L) of hydraulic oil. If the oil is to be reused, clean
containers must be used with a filtering (3 micron)
system available for refill.
2. Thoroughly clean the outside of the hydraulic
tank and attached equipment.
3. Drain the hydraulic tank by removing the drain
plug (2, Figure 3-17) located on the bottom of
the tank.
Take care to avoid contact with hot oil if truck
has been operating. Avoid spillage and contami-
nation.
4. Disconnect hydraulic lines. Plug lines to prevent
possible contamination to the system. Tag each
line at removal for proper identification during
installation.
5. Attach a lifting device to the hydraulic tank.
6. Remove the capscrews and lockwashers secur-
ing the hydraulic tank mount caps to the frame.
7. Move hydraulic tank to a clean work area for dis-
assembly or repair.
7/02 L03026