The hydraulic reservoir, pump, filter, and control valve
are located in the hydraulic tray on the right side of the
chassis.
Fluid Level
Check the hydraulic fluid level with the aerial platform on
a level surface and the platform raised about two feet.
The fluid must be visible in the plastic tube (refer to Fig-
ure 8.6).
Figure 8.6—Fluid Level Indicator
Not all hydraulic fluid is suitable to use in the hy-
draulic system. Some have poor lubricating charac-
teristics and can increase component wear. Only
use hydraulic fluid as recommended.
If necessary, remove the filler cap and add fluid of the
proper type. Refer to Chapter 2—Specifications for the
proper type and grade of hydraulic fluid to use. The need
to regularly add fluid indicates a leak that should be cor-
rected.
Hoses, Tubes, and Fittings
Inspect all hydraulic hoses, tubes, and fittings for wear,
leakage, or damage (refer to Figure 8.7). Make sure the
hoses are properly routed to avoid sharp edges, kink-
ing, and scuffing. Inspect the tubes for dents or other
damage that may restrict fluid flow. Make sure all hoses
and tubes are held firmly in their support brackets.
Figure 8.7—Hose, Tubes, and Fittings
Hydraulic fluid leaks are easily visible on the ground.
Check under the chassis for fluid that has leaked.
Free-Wheeling Valve
Swing out the hydraulic tray. The free-wheeling valve is
located on the hydraulic manifold (refer to Figure 8.8).
Check the free-wheeling valve to make sure it is fully
closed (clockwise).
Figure 8.8—Free-Wheeling Valve
S1930 – 0361266
8 - 3
Chapter 8. Prestart Inspection
A
CAUTION
Fluid Level
Indicator
Free-Wheeling Valve
