Right Hand Hoist Clutch and Power Load Lowering Lever

Crane-Shovel Controls and Instruments

Figure 14. Crane controls and instruments.

TM-5-3810-227-15 Crane-Shovel Basic Unit Truck Mounted: 20 Ton 3/4 Cu.Yd. Gasoline Engine 6x6 Manual
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the engine clutch lever. This lever is used to engage and

d. Right Hand Hoist Clutch and Power Load

disengage the jaw clutch on the boom hoist shaft.

Lowering Lever (fig. 14). The right hand hoist clutch

lever is located in front of the operator and to the right.

m. Swing Brake Wheel (A, fig. 14). The swing brake

This lever controls the right hand hoist clutch and is also

wheel is located to the right below the operator's seat and

used for power load lowering.

is used to engage and disengage the swing brake.

e. Left Hand Hoist Clutch Lever (A, fig. 14). The

n. Panel Lights (B, fig. 14). The two instrument

left hand hoist clutch lever is located in front of the

panel lights mounted at the top of the crane instrument

operator and to the right of the right hand hoist clutch

panel are controlled by the lower toggle switch at the

lever. This lever controls the left hand hoist clutch.

extreme right hand corner of the panel.

f. Left Hand Hoist Brake Pedal (A, fig. 14). The left

o. Starter Button (B, fig. 14). The engine starter

hand hoist brake pedal is located on the floor in front of

button is located at the top center of the instrument panel

the operator between the right hand hoist clutch and

and is a push-type button. It is used in conjunction with

boom hoist lever. It is a toe lock, heel release type pedal

the ignition switch to start the crane engine.

and controls the left hand hoist brake and is used in

p. Ignition Switch (B, fig. 14). The ignition switch is

conjunction with the left hand hoist clutch lever.

located at the bottom center of the instrument panel and

g. Right Hand Hoist Brake Pedal (A, fig. 14). The

is a key-tape switch. Turn key clockwise to stop engine.

right hand hoist brake pedal is located on the floor in front

q. Choke (B, fig. 14). The choke control is mounted

of the operator between the boom hoist lever and

at the bottom of the instrument panel directly below the

reversing clutch lever. It is a toe lock, heel release type

ignition switch and is the push-pull type. The choke is

pedal and controls the right hand hoist brake and is used

used to operate the choke valve in the carburetor when

in conjunction with the right hand hoist clutch lever.

starting the engine.

h. Throttle (A, fig. 14). The engine throttle is

r. Oil Pressure Gage (B, fig. 14). The oil pressure

mounted on the structural frame to the right of the

gage is located at the top left of the instrument panel and

operator's seat. It is used to increase and decrease the

indicates the engine lubricating oil pressure. Normal oil

engine speed.

pressure at operating temperature and speed is 40 to 50

i. Safety Pawl Lever (A, fig. 14). The safety pawl

pounds per square inch. With a cold engine, the pressure

lever is mounted on the structural frame below and

will exceed this. The gage should show pressure as soon

slightly forward of the throttle. This lever is used to

as the engine is started. Failure of the oil pressure gage

disengage the safety pawl that locks the boom hoist.

to operate is a danger signal.

Stop the engine

immediately, and check the cause.

j. Cab Lock Lever (A, fig. 14). The cab lock lever

is located to the right and slightly behind the operator's

s. Water Temperature Gage (B, fig. 14). The water

seat.

This lever is used to lock the revolving

temperature gage is located on the left side of the

superstructure in position and prevent from turning.

instrument panel directly below the oil pressure gage.

This gage registers the temperature of liquid in the

k. Engine Clutch Lever (A, fig. 14). The engine

cooling system and should show a gradual increase in

clutch lever is located to the right and behind the

temperature during engine warm up, to a normal

operator's seat, and is connected to the engine or main

operating temperature of 160to 180F.

clutch through linkage. This lever is used to engage and

disengage the engine clutch.

t. Battery-Generator Indicator (B, fig. 14). The

indicator is located at the bottom left of the instrument

l. Jaw Clutch Lever (A, fig. 14). The jaw clutch

lever is located to the right of the operator's seat behind

AGO 6819A

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