Snorkel S1930-snAP05168 - Manual (Page 25)

Chapter 8 – Prestart Inspection
S1930 – 0361527 21
Hydraulic System
Hydraulic power is supplied from a single stage hydraulic
pump with a 4.25 horsepower DC electrical motor.
A
Danger
Hydraulic fluid escaping under pressure can have
enough force to inject fluid into the flesh. Serious
infection or reaction will result if medical treatment
is not given immediately. In case of injury by escap-
ing hydraulic fluid, seek medical attention at once.
The hydraulic reservoir, pump, filter, and control valve are
located in the hydraulic tray on the right side of the chas-
sis.
Fluid Level
Check the hydraulic fluid level with the aerial platform on
a level surface and the platform stowed. The fluid level
must be between the add and full marks (refer to Figure
8.6).
Figure 8.6 – Hydraulic Tray
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Caution
Not all hydraulic fluid is suitable to use in the hy-
draulic system. Some have poor lubricating char-
acteristics 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, kinking,
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 – Hoses, Tubes, and Fittings
Hydraulic fluid leaks are easily visible on the ground.
Check under the chassis for fluid that has leaked.
Free-Wheeling Valve
The free-wheeling valve is located on the hydraulic mani-
fold (refer to Figure 8.8) on the hydraulic tray. Check the
free-wheeling valve to make sure it is fully closed (clock-
wise).
Figure 8.8 – Free-Wheeling Valve
Fluid Level Indicator
Free-Wheeling Valve