Operator`s manual

122 918496/GP0313
Hydraulic System Maintenance
Never use your hands to search for
hydraulic fluid leaks; use a piece of paper
or cardboard to find leaks. Escaping fluid under pressure
can be invisible and can penetrate the skin, causing serious
injury. If any fluid is injected into your skin, see a doctor at
once. Injected fluid MUST be surgically removed, or
gangrene may result.
Hydraulic Oil
Checking Hydraulic Oil Level
1. Completely lower the lift arm and attachment.
2. Perform the “Mandatory Safety Shut-
down Procedure” on page 10.
3. Open the hood.
4. Check the hydraulic oil level by
removing the dipstick (U, Fig. 89),
located on the left in the engine com-
partment.
5. If hydraulic oil is required, allow the
system to cool.
6. Slowly remove the oil fill cap (V, Fig.
89). Allow the pressure to escape
before completely removing the cap.
Important: On AL 100 Series machines,
remove the hydraulic oil filter cap (W, Fig.
89) and lift the hydraulic oil filter (A, Fig.
90) slightly before adding oil. Lifting the
oil filter breaks the air seal and allows the
hydraulic tanks to vent, allowing the tanks
on both sides of the machine to fill evenly,
otherwise, the hydraulic tanks will not fill
evenly or completely.
7. Add hydraulic fluid as required.
See “Fluid Capacities/Lubricants” on
page 31.
Note: Do not mix different types/grades of hydraulic fluids.
8. Reinstall the oil fill cap. On AL 100 Series machines, re-seat the hydraulic oil
filter and reinstall the hydraulic oil filter cap.
WARNING
Figure 89 – Hydraulic Oil Ser-
vice
U
V
W
AL 500 Series shown
(other machines similar)
Figure 90 – Hydraulic Oil Filter
A
AL 100 Series