Komatsu — 3.3.5 MACHINE CONTROLS

INSTRUMENTS AND CONTROLS 4 - AUXILIARY HYDRAULIC KIT CONTROL PEDAL (IF INSTALLED) q The procedures to be followed to use any control sy- stems different from the ISO and OPTION PATTERNS are described in section "OPTIONAL EQUIPMENT" (See "6.5 HAND & FOOT CONTROL SYSTEM"). Carefully read and be sure to understand the contents of this section before using the machine. q Always apply the safety guard (2) when the use of this control is not required, during travel and when parking the machine. q When installing any hydraulic control equipment, make sure that the control pedal (1) is always in neutral posi- tion and covered by the safety guard (2).

q Never set the control pedal in the "maximum flow" posi- tion (B), unless the machine is stationary, with raised sa- fety bars, and the operator is seated in driving position with fastened safety belt. The pedal (1) controls the opening and closing of the oil flow to the equipment and has three fixed positions (left, neutral, ri- ght). NOTE q To use the pedal (1), lift the safety guard (2). 1 - Neutral position (A) (HYDRAULIC CIRCUIT CLOSED). When the pedal is in this position, it isn't possible to use the optional equipment in any way.

2 - Pressed pedal (B) (HYDRAULIC CIRCUIT OPEN) When the pedal is pressed with the left side of the foot and locked in this position with the lever (3), a continuous oil flow is delivered to the equipment (excavator, demoli- tion hammer, asphalt cutter, etc.). To release the pedal (1) and set it in neutral or horizontal position, push the locking lever (3) forward as indicated in the figure (A). 3 - Bidirectional flow position. The pedal is also used to control the oil flow to the equip- ment with bidirectional hydraulic circuit (multi-purpose buckets, drills, asphat cutters, etc.).

Shift the locking lever (3) to the release position and press the pedal (1) to posi- tion L or R to control the oil flow to the equipment. The quantity of oil conveyed in each direction is proportional to the pressure exerted on the pedal. 86 CAUTION WARNING