3.7 Practices to improve efficiency

3.7 PRACTICES TO IMPROVE EFFICIENCY

WARNING

•Swinging on a slope may cause the machine to become unstable or unbalanced. Do not swing down side of the slope with a full bucket. When working in slopes, build a level area for the machine to operate safely. •Make certain the swing area of the machine is clear of people and obstacles before swinging.

SHALLOW

DIGGING DIRECTION

A. DIGGING

1.Use Arm In Action Operate the bucket at shallow depth, use the arm mainly, and use the bucket as required, in action to fill the bucket. Setting the bucket too deep will decrease the machine’s efficiency. 2.Maximum Digging Force Position The attachment will provide maximum digging force when the arm and boom are at 90˚-110˚ of each other. Operate slowly to get maximum digging force. 3.Bucket Teeth Direction Always point bucket teeth in the direction the machine will be digging, and operate the bucket at shallow depth, to reduce digging resistance and the possibility of bucket teeth damage. 4.Operate Boom Smoothly Always begin and end boom operation slowly with smooth, careful movement of the control lever. Do not perform sudden starts and stops, especially sudden stops during dropping, of the boom as this creates unnecessary stress on the machine and its components.

5.Cleaning Sand & Soil from Bucket

Operate arm to a near level position and bring the bucket to a dumping position. If sand and soil do not fall out, move the bucket lever right and left a few times.

NOTE: Other than showing in the below sketches, wider range of the machine application is obtainable by means of utilizing the optional attachments. Refer to the section “MAINTENANCE” for changing the bucket.

1. DITCH DIGGING

The working efficiency is much improved by means of setting the bucket suitable for trench digging and setting the machine in parallel to the trench to be digged.

For wide ditch digging, dig both sides portions at first, then dig the center portion.

2. USING THE DOZER

1.The dozer is used to push the soil back to digged ditch, or for ground leveling. 2.Scrape the soil laid on the ground at its upper or side face with the dozer. Adjust the height of dozer with the dozer control lever to avoid overloading the engine.

3. OFFSET DIGGING

WARNING

Carefully operate the attachment paying attention to the surrounding conditions, since the boom swing operating range is wide.

The boom swings to the left and to the right enabling side digging in narrow spaces, by depressing the left and right sides of the swing pedal. By depressing the left side of swing pedal, the boom swings leftward, and by pressing the right side the boom swings rightward. The advantage of this function is that it enables offset digging work as shown in the figure.

B. LOADING

1.The working efficiency is improved, if the dump truck is set at the position so that the slewing angle becomes minimum keeping a good visual field of the operator. 2.It is recommended that loading be started from the front side of the dump truck body. This will make loading easier and more soil can be loaded than loading from the side.

C. WORKING IN NARROW SPACE

The position is available for slewinging in narrow spaces.

D. MINIMUM SLEWING POSITION

1.Extend arm cylinder and bucket cylinder to maximum length, and fold bucket. 2.Extend boom cylinder to maximum length. 3.Swing boom by depressing boom swing pedal provided on right side. 4.Handle operating lever to swing boom.

NOTE: Use care to protect attachment from interference.

E9SR

* MINIMUM SLEWING RADIUS

Boom Model

At swing (Minimum slewing radius) Not swing (Minimum slewing radius)

970 mm (3’ 2.2”) (Boom Swing-Left 80°) 1250mm (4’ 1.2”)

NOTE: Dimensions shown in the above table are specifield for Standard/Long Arm.