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LeeBoy 8520C Conveyor Paver 5-25
Maintenance
Hydraulic System
Check Hydraulic OilCheck Hydraulic Oil
The hydraulic motors and hydraulic cylinders use the
same hydraulic oil reservoir and hydraulic oil supply.
Take care when working with the
hydraulic system to ensure it is completely clean.
Never allow the hydraulic oil level to
fall too low. Pump damage will occur.
DO NOT use your hands on any
hydraulic hoses, ttings or system component when
checking for leaks. Serious personal injury can
result from an oil leak under high pressure. Oil can
be injected under the skin by high pressure. Protect
the eyes by wearing safety glasses.
• Check the hydraulic oil level daily using the sight
gauge on the left side of the paver. (Figure 5-27)
Add hydraulic oil if needed.
• Fill to the black line on decal to the left of the sight
gauge if the hydraulic oil is cold.
• Fill to the ll line if the hydraulic oil is at normal
operating temperature (preferred method for an
accurate reading).
Figure 5-27. Hydraulic Oil Sight Gauge
DO NOT loosen or remove the
hydraulic oil strainer ll cap when the hydraulic oil
is hot. Always loosen the cap slowly to relieve any
pressure in the hydraulic oil reservoir.
Protect your eyes by wearing
safety glasses when working on hydraulic system
components.
• DO NOT use unltered hydraulic oil.
• Check the hydraulic oil level using the sight gauge.
• Keep the hydraulic oil lled to the correct level.
DO NOT overll the hydraulic oil
reservoir.
Leeboy uses a leak-detection dye that
may turn the hydraulic oil a slight yellow tint.
Change Hydraulic Oil and FilterChange Hydraulic Oil and Filter
Changing the hydraulic oil removes the accumula-
tion of dirt, water and mechanical wear particles from
the hydraulic oil system. Clean, ltered oil is critical to
optimize hydraulic system operation. The hydraulic oil
system holds approximately 25 gallons.
Contaminated hydraulic oil can
shorten the expected service life of components in
the hydraulic system.
DO NOT drain the hydraulic oil when it
is hot. Hot hydraulic oil can cause serious personal
injury.
Protect your eyes by wearing
safety glasses when working on hydraulic system
components.
Use the following procedures to change the hydraulic oil
and charge lter:
1. Raise the hood following instructions on Page 5-5.
2. Stop the engine.
3. Allow the hydraulic oil to cool until it is at a warm
temperature.
4. Slowly remove the hydraulic oil strainer ll cap.
(Figure 5-28) Do not remove the strainer portion
under the cap.
Fill
Cap
Figure 5-28. Hydraulic Oil Cap
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