Maintenance - Wallenstein GX620 Operator's Manual

5.2

MAINTENANCE

5.2.1 HYDRAULIC OIL
Every 1000 operating hours or annually,
whichever comes fi rst, the oil in the optional
hydraulic system should be changed. To
change oil, follow the procedure below:
1. Stop the engine and allow the system to
cool to the touch.
2. Place a large container under the drain
plug. More than one container may be re-
quired since the tank holds 3 U.S. gallons
(11 l.).
3. Remove the drain plug and allow the sys-
tem to drain for 10 minutes.
4. Remove and clean hydraulic screen.
5. Install the drain plug using tefl on tape
or pipe sealant compound and fi ll the
reservoir with a heavy duty hydraulic oil.
System capacity is approximately 3 U.S.
gallons (11 l.). Fill to within 1 inch (25 mm)
from the top of the tank.
6. Start the engine and run for 3 minutes.
Operate all systems to purge the lines of
air and to check for leaks.
7. Check the oil level in the reservoir and top
up as required.
5.2.2 BUCKET TEETH
The bucket teeth are designed to be replaced.
They should be checked weekly. They need to
be replaced if bent, broken or worn out.
When replacing, follow this procedure:
1. Clear the area of bystanders, especially
small children.
2. Lower dipper / bucket to the ground, place
all controls in neutral, stop engine, set
park brake, remove ignition key and wait
for all moving parts to stop before dis-
mounting.
3. Remove tooth / teeth that need replacing.
4. Install replacement tooth and weld in posi-
tion.
Fig. 70 HYDRAULIC RESERVOIR
Fig. 71 TEETH
61