Front Blade Lift Cylinder
(Option)
If equipped with the optional front blade, use the
following procedure to replace the front blade lift
cylinder:
1. With the front blade component attached, park
the grader on a level surface in a designated area
where oil does not touch or run off onto the ground.
Engage the park brake, shut down the engine, and
place wheel chocks on wheels for safety.
2. Lower the front blade attachment to the ground and
use chocks on each side to prevent the blade from
falling. Use a sling or other means of supporting the
front blade lift cylinder.
3. Disconnect, plug and tag the hydraulic hoses, being
very careful to prevent any contamination when
plugging the hydraulic hose ttings.
Front Blade
Cylinder
Figure 5-48. Front Blade Lift Cylinder
4. Remove the hex nut, bolt and cylinder pin from one
side, then the other side of the cylinder. (Figure
5-48)
5. Carefully slide the cylinder from the frame to remove
it. Clean the area thoroughly before installing new
cylinder.
6. Position the new front blade lift cylinder into place
and reinstall nuts, bolts and pins.
7. Reconnect the hydraulic hoses according to the
tags for correct reconnection. Start the engine and
idle for a few minutes to ensure the hydraulic oil has
warmed in the system.
8. Raise and lower the blade several times to ensure
proper operation and check for leaks.
WELDING ON MACHINE
Figure 5-49. Welding
If the machine has been damaged or metal parts worn
due to extensive use, minor welding may be necessary
for repair. Welding is very dangerous. Only individuals
who are properly trained should weld in a dedicated
area away from others as even looking at ultraviolet light
from the arcing can cause serious eye injury.
Welding hazards include toxic fumes, harmful dust,
light radiation, burns, combustion from sparks and the
potential for extensive damage to the eye. There is also
a danger of electric shock. If combustible or ammable
materials are nearby, the heat and sparks produced by
welding can cause res or explosions.
Electrical current can ignite re, cause an explosion or
damage machine components, therefore it is critical
to turn off power to the machine. It is also important to
grind off the paint to ensure proper ground on the area
being welded.
DO NOT weld on or near fuel tanks.
DO NOT weld near electrical
components and harnesses. All components should
be protect from heat and welding sparks.
Maintenance
LeeBoy 685D Motor Grader5-40
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