b. Cleaning and Inspection.
(1) Clean horn with a damp cloth.
(2) Inspect for defects or damage.
(3) Replace defective or damaged parts.
c. Installation. Install horn as illustrated in figure 4-
85.
4-92. Floodlights
a. Removal Remove the floodlights as illustrated in
b. Replacement. Replace defective parts.
c. Installation. Install floodlights as illustrated in
4-93. Crane Cab Wiring
Inspect and repair the crane cab wiring as instructed in
paragraph 4-69.
Figure 4-86. Floodlight, removal and installation
.
Section XVIII. CRANE HYDRAULIC SYSTEM
b. Fill (Model 2385). Add hydraulic fluid to master
4-94. General
cylinder reservoir until level is at HIGH level mark on
Each hydraulic control lever is mechanically connected to
dipstick. Keep oil level between HIGH and LOW level
a master cylinder. Each master cylinder is connected to
marks. Refer to lubrication order.
a hydraulic cylinder by a hydraulic line, and in turn each
c. Bleed.
cylinder is connected to a clutch by mechanical linkage.
(1) Cycle clutch until bleeder valve is at
Movement of a lever actuates the position in the
highest point of clutch.
corresponding cylinder.
(2) Attach hose of bleeding ball to bleeder
NOTE
valve. Draw off air and fluid into a container.
Be sure the working area is clean when
(3) bleeder valve on clutch cylinder before
working on hydraulic components.
detaching bleeder ball from master cylinder.
Cleanliness is the greatest factor for
(4) Operate clutch. If clutch is still "spongy" or
good hydraulic operation.
lacks desired holding power, check all hydraulic lines
from master cylinder, including clutch cylinder, for any
4-95. Service ,
seepage. If seepage is found, retighten connections, or
a. Fill (Model 2380). Add hydraulic fluid to master
replace. Repeat bleeding operation.
cylinder until level is 1/6 inch from top. Refer to
lubrication order.
4-89
