Leaks on the suction side of the hydraulic system are
more difcult to nd and more serious since air or dirt
introduced into the system causes rapid component
wear and eventual failure. Some symptoms of suction
leakage are:
• Hydraulic uid “foaming.”
• Sluggish system operation.
• Unusual noises in the hydraulic pumps or motors.
Checking Hydraulic Oil Level
The hydraulic oil tank and sight gauge is located on the
right side of the machine. (Figure 5-26) The hydraulic
oil ll cap is just behind the left operator platform.
(Figure 5-27)
1. Make sure that the hoppers are retracted so that oil
ows to the tank, ensuring an accurate reading.
2. Wait 10 minutes after engine has been shut down
before checking hydraulic oil.
Oil level is determined by sight gauge.
Hydraulic oil should be added if the oil level falls
below the ll line. Never ll above the black ll line.
Figure 5-26. Hydraulic Gauge
Use extreme caution when removing
the ller cap to prevent foreign matter from entering
the hydraulic tank.
3. If level is low, clean around the hydraulic oil ller cap
before removing to add hydraulic oil to the tank.
4. Fill tank to the black ll line on sight gauge.
5. Screw the hydraulic oil ller cap back onto the
hydraulic tank.
Hydraulic
Fluid
Fill Cap
Figure 5-27. Hydraulic Oil Fill Cap
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 hydraulic oil changes after continuous
use, therefore, new oil is important to ensure correct
operation of the hydraulic system.
Hydraulic oil that has oxidized or
contains contamination can shorten the expected
service life of the components in the hydraulic
system.
Use the following procedures to change the hydraulic
oil:
1. Stop the engine. Allow the hydraulic oil to cool
until it is at a warm temperature. Slowly loosen and
remove the hydraulic oil reservoir ller cap. Put a
clean, lint-free cloth over the hydraulic tank ll cap
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.
2. Carefully remove the plug from the hydraulic
tank. Use a drain collection container of sufcient
capacity to collect the hydraulic oil underneath.
Allow all of the hydraulic oil to drain into the
container.
DO NOT ll the hydraulic oil reservoir
with new hydraulic oil until the suction strainer has
been serviced.
5
Maintenance
Rosco CSV Variable Width Chip Spreader 5-21
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