FILLING'THE BACKHOE DIPPER
PUSH FORWARD ON THE FRONT DRUM LEVER, ALLOWING DRAG CABLE TO PLAY OUT AS THE DIPPER
SWINGS OUT. PULL REAR DRUM LEVER TO TAKE UP SLACK IN THE HOIST LINE AND TO PREVENT THE BOOM
FROM DROPPING. WHEN THE DIPPER IS EXTENDED FULLY, PUSH THE REAR DRUM LEVER FORWARD AND
RELEASE THE REAR DRUM BRAKE PEDAL, GRADUALLY ALLOWING THE BOOM AND DIPPER TO LOWER AND
BITE INTO THE GROUND. STEP ON THE REARDRUM BRAKE PEDAL AND PULL THE FRONT DRUM LEVER BACK
TO START'DRAGGING THE DIPPER IN TOWARD THE MACHINE. CONTROL THE DEPTH OF THE BITE WITH THE
REAR DRUM BRAKE PEDAL. EASING UP ON PEDAL WILL DROP THE DIPPER FOR A BIGGER BITE. HOLDING IT
WILL CAUSE DIPPER TO RISE. PRACTICE THE INTERCONTROL OF THE HOIST AND DRAG CABLE BRAKES AND
LEVERS TO BECOME FAMILIAR WITH THEIR OPERATION. WHEN THE DIPPER IS FULL, APPLY BOTH BRAKES
AND PUSH THE FRONT DRUM LEVER FORWARD' (TO NEUTRAL) TO STOP THE DRAGGING ACTION.
RAISING THE FLLED DIPPER (HOISTING)
PULL THE REAR DRUM LEVER BACK AND RELEASE THE REAR DRUM BRAKE PEDAL. AS THE BOOM IS RAISED,
EASE UP SLIGHTLY ON THE FRONT DRUM BRAKE PEDAL, BUT KEEP ENOUGH TENSION IN THE DRAG CABLE
TO HOLD THE DIPPER LEVEL UNDER THE BOOM. WHEN THE DIPPER IS RAISED HIGH ENOUGH TO CLEAR THE
EXCAVATION, PUSH THE REAR DRUM LEVER FORWARD TO NEUTRAL AND SIMULTANEOUSLY DEPRESS THE
REAR DRUM BRAKE.
Figure 2-40. Backhoe operation and control positions (sheet 1 of 2 ).
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