Operating The Front End Loader And Backhoe; Operating The Front End Loader; Control Lever Positions - Komatsu WB140-2N Operation & Maintenance Manual

OPERATION

OPERATING THE FRONT END LOADER AND BACKHOE

When preparing to operate the front end loader or backhoe it is important to be aware of your working conditions and hazards
involved, always study the job carefully before starting any operations. Operate within the operating parameters specified in
this manual. Never use this work equipment for something it was not intended, damage to the equipment or injury to the oper-
ator may result.

OPERATING THE FRONT END LOADER

Before using front end loader (4) be sure front end loader lock (3) is
unlocked. When operating the front end loader you must be seated in the
operator's seat with the seat belt fastened firmly around your waist. Be
sure both outriggers are up and locked. Be sure the backhoe unit is
locked and pined. See "BACKHOE LOCKS" on page 2-46. Check your
work area to be sure no personnel are near you. Sound your horn before
beginning work operations.
.
When operating the front end loader:
• Always keep the bucket as close to the ground as possi-
ble.
• Never raise or lower the bucket while traveling, always
come to a complete stop when raising or lowering the
loader bucket.
• Avoid lowering the bucket too quickly, damage to the lift
arm cylinders may result.
• When traveling with a loaded bucket maintain a height of
50 cm (20 in) above the ground.
• When loader operations are completed lower the loader
bucket to the ground and set the loader lock
• Avoid sharp turns with a loaded bucket.
• When loading the bucket, never ram a load at high
speeds and never overload the bucket.

CONTROL LEVER POSITIONS

Loader Bucket and Arm Operations
When the control lever is moved forward or backward and at right and
left angles the bucket and arm will move in the positions indicated in the
illustration.
N
- Neutral position (no boom or bucket movement)
A
- Bucket curl back
B
- Arm lower
C
- Bucket dump
D
- Arm raise
E
- Arm in free float position
F
- Self leveling (return to dig)
2-34 WB140-2N, WB150-2N