LeeBoy 8510b - Changing Hydraulic Oil and Strainer

7
LeeBoy Model 8510B Conveyor Paver 7-27
Maintenance
Changing Hydraulic Oil
Changing the hydraulic oil removes the accumulation
of dirt, water and mechanical wear particles from
the hydraulic oil reservoir and system. The chemical
structure of the hydraulic oil also changes after
continuous use in the system and new, clean, and
ltered oil is a must to help insure further correct
operation of the hydraulic system.
Hydraulic oil which has oxidized or
which contains contamination, of any type, can
shorten the expected service life of any, or all, of the
components in the hydraulic system.
Use the following procedures to change the hydraulic oil
in the hydraulic oil tank (Figure 7-23).
1. Stop the engine. Allow the hydraulic oil to cool, until
it is at a warm temperature only. Slowly loosen, and
then remove, the hydraulic oil reservoir ller cap
(Figure 7-23,2). Put a CLEAN, lint free cloth over
the reservoir ll tube opening and secure in place
with tape.
Do not drain the hydraulic oil from
the reservoir when it is “HOT”. Hot hydraulic oil can
cause serious injury. Drain at a warm temperature
only.
NOTE: All reservoir tanks together plus hoses hold
approximately 40 gallons.
2. Carefully remove the plugs from the hydraulic
tanks. Use a drain collection device, of sufcient
capacity to collect the hydraulic oil. Allow all of the
hydraulic oil to drain from the reservoirs and into the
container.
Do not ll the hydraulic oil reservoir
with new hydraulic oil until the strainer has been
serviced.
3. Install the hydraulic oil reservoir drain plug, and
tighten securely.
4. Carefully remove the cloth from the hydraulic oil
reservoir ll tube opening.
5. To be sure the bottom oil tank is properly lled,
proceed as follows:
a. Remove the strainer on the top tank.
b. Fill the top hydraulic oil tank with the correct,
ltered hydraulic oil until tank is full.
c. Crank engine and let pump transfer oil from
top tank to bottom tank.
d. Monitor oil level in top tank. When oil level is
below one-half full, shut off engine and rell top
tank.
e. Repeat this process until proper level is
obtained.
Do not overll the hydraulic oil
reservoir with oil.
Never let tank run dry. Pump damage
will occur.
6. Check the oil level in the hydraulic oil reservoir,
again. Add oil if needed.
7. Install the hydraulic oil reservoir ller cap onto the
reservoir ller neck and tighten securely.
8. Start the engine using the correct procedures (see
Starting The Engine in Section 6).
9. Check the hydraulic system for any leaks.
Do not use the hands on any hydraulic
hose, tting or system component to check the
system for possible leaks. Serious 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.
Stop the engine immediately if any
hydraulic leak is noted. Do not start the engine until
any problem noted has been corrected.
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