574B Forwarder Power Train Accelerator Pedal Caterpillar


Accelerator Pedal
`
574B Forwarder Power Train [RENR6114]
OPERATOR STATION
PEDAL GP
574B Forwarder Power Train Accelerator Pedal



Illustration 1g00871723

There are two accelerator pedals that are inside the cab. One pedal is located at the front of the cab. One pedal is located at the rear of the cab.

The accelerator pedal controls the ground speed of the machine when a travel direction has been selected. The accelerator pedal will only allow the machine to travel as fast as the setting of the machine speed control.




Illustration 2g00927482

Both accelerator pedals allow the power train pump and the engine governor to be controlled proportionally.

When you first move the accelerator pedal from the START position, no voltage flows from the pedal to the IQAN. If you move the pedal slightly more the "minimum voltage" (B) will flow from the pedal to the IQAN.

The "minimum current" should be adjusted so that the machine does not move during the initial output from the accelerator pedal. When the accelerator pedal is pushed slightly more the machine should begin to move.

If the "minimum current" is too low, the accelerator pedal must be moved excessively in order to begin the movement of the machine. If the "minimum current" is too high, the machine will jump when you move the accelerator pedal from the neutral position.

When the accelerator pedal reaches the end of travel, the maximum current will flow from the accelerator pedal. The "maximum current" should be adjusted so that the maximum speed of the machine corresponds to maximum travel of the accelerator pedal.

If the maximum current is set too high, the accelerator pedal will not move all the way to reach maximum speed. If the maximum current is set too low, the machine will not move at maximum speed.

In Illustration 2, line (C) shows the "minimum current" and "maximum current" set too high. This causes the function to jump when you move the accelerator pedal. This also causes the function to reach maximum speed before the accelerator pedal reaches the end of travel.

Information System:

3054E Industrial Engine Camshaft Bearings - Remove and Install
793C and 793C XQ Off-Highway Truck Steering System Steering Linkage and Cylinder Mounting
3512 and 3516 EUI Engines for 784B, 785B, 789B and 793B Off-Highway Trucks ECM Output Circuit (Engine Coolant Temperature Lamp)
3512 and 3516 EUI Engines for 784B, 785B, 789B and 793B Off-Highway Trucks ECM Output Circuit (Engine Oil Pressure Lamp)
3512 and 3516 EUI Engines for 784B, 785B, 789B and 793B Off-Highway Trucks ECM Output Circuit (Engine ON Signal)
AP-1000D, AP-1055D, AP-655C, BG-2255C, BG-2455D and BG-260D Asphalt Pavers MID 039 - CID 0975 - FMI 08
574B Forwarder Power Train Monitoring System
773D, 773E, 775D and 775E Off-Highway Trucks Machine Systems Piston Pump (Steering) - Disassemble
773D, 773E, 775D and 775E Off-Highway Trucks Machine Systems Piston Pump (Steering) - Assemble
3054C Industrial Engine and C4.4 Marine Auxiliary Generator Set Fuel System Pressure - Test
3054C Industrial Engine and C4.4 Marine Auxiliary Generator Set Fuel System - Prime
3126B Machine Engines System Configuration Parameters
D350E and D400E Articulated Trucks Power Train Lockup Clutch and Solenoid Valve
574B Forwarder Power Train On/Off Switches
CB-634D Paving Compactor Machine Electronic Control System Service Tools
14H Motor Grader Machine Systems Blade Lift Cylinder - Remove and Install
Test Sequence for Capsule Type Fuel Nozzles{0782}
14H Motor Grader Machine Systems Wheel Lean Bar - Remove and Install
Bench Test Procedure for Hydraulic Piston Pumps{5070}
Bench Test Procedure for Hydraulic Piston Pumps {4268, 4306, 5070}
14H Motor Grader Machine Systems Combination Valve - Remove
TK711, TK721, TK722 and TK732 Track Feller Bunchers Hydraulic System Pump Control (Output Flow) - Adjust
14H Motor Grader Machine Systems Bank Valve - Remove
14H Motor Grader Machine Systems Bank Valve - Install