- 1. Travel controls - control the machine travel speed and direction (forward or reverse) by adjusting the swashplate tilt angle of the track drive pump. Either control can be used to adjust the travel speed. THE ENGINE WILL NOT START UNLESS THE CONTROLS ARE AT "N".
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IF THERE IS PRESSURE IN THE TRACK DRIVE SYSTEM, THE MACHINE MAY LUNGE FORWARD OR BACKWARD WHEN THE PARK BRAKE IS MOVED TO "OFF" AND THEREBY CAUSE AN INJURY. BE SURE THE TRAVEL CONTROL IS AT "N" BEFORE RELEASING THE PARK BRAKE.
- 2. Park brake control - engages or disengages the park brake on the front track if the engine is running. If the engine is not running or the control (auxiliary) hydraulic system pressure falls below 180 psi (1241 kPa) the brake will automatically engage.
Setting the control at "Off" directs auxiliary hydraulic pressure to the brake to release it. Setting the control at "On" relieves the pressure and engages the brake.
- 3. Track pressure gauge - shows the hydraulic oil pressure in the track drive system in pounds per square inch (psi). The pressure will vary from 0 to 4500 psi (0 to 31 028 kPa), the pump pressure override control setting.
Show/hide tableIT IS POSSIBLE TO LOSE THE INHERENT BRAKING ABILITY OF THE TRACK DRIVE HYDROSTATIC TRANSMISSION IN A PERIOD OF MACHINE ACCELERATION, DECELERATION OR WHEN THE PUMP IS IN NEUTRAL. THE LOSS OF INHERENT BRAKING COULD CAUSE PERSONAL INJURY.
TO MINIMIZE THE POSSIBILITY OF LOSING THE INHERENT BRAKING, THE REAR OVERDRIVE CONTROL (ITEM 4) MUST BE AT "OFF" WHENEVER OPERATING UP OR DOWN GRADES IN EXCESS OF 8 PERCENT. THE FRONT TRACK OVERDRIVE CONTROL (ITEM 4) MUST BE AT "ON" WHEN LOADING THE MACHINE ONTO A TRAILER FOR TRANSPORTING.
Show/hide tableNOTICE IT MAY BE DESIRABLE IN SOME CASES TO PERFORM A CUTTING OPERATION WITH THE FRONT TRACK OVERDRIVE ENGAGED. TRACK PRESSURES WITH THE FRONT TRACK OVERDRIVE ENGAGED WILL PROBABLY RISE TO 3000 TO 3300 PSI (20 685 TO 22 754 kPa) WHICH WILL NOT HARM THE SYSTEM. HOWEVER, SUSTAINED OPERATION WITH TRACK PRESSURES ABOVE 3500 PSI (24 133 kPa) WILL DRASTICALLY SHORTEN THE LIFE OF THE TRACK GEAR REDUCERS.
- 4. Front track overdrive control - turns the front track overdrive "On" or "Off". When this control is at "Off", the front track motor control plate is at maximum tilt (25°) to provide maximum torque. When the control is at "On", the front track motor control plate is at minimum tilt (10°) to provide maximum speed.
- 5. Rear overdrive control - same as the front track overdrive control, except controls both rear track motor control plates.
- 2. Park brake control - engages or disengages the park brake on the front track if the engine is running. If the engine is not running or the control (auxiliary) hydraulic system pressure falls below 180 psi (1241 kPa) the brake will automatically engage.
