ADAPTER-RH 5054131 - Caterpillar

Illustration 1 g00785407
Schematic of the auxiliary control for the auxiliary hydraulicsDo NOT start the machine for any of the following Test Steps.Note: After any repair to the auxiliary hydraulic control, cycle the key start switch five times with at least five seconds between cycles in order to reset the calibrations within the auxiliary hydraulic ECM.Test Step 1. CHECK THE DUTY CYCLE OF THE AUXILIARY HYDRAULIC CONTROL
Turn the key start switch to the OFF position.
Remove the access panel for the work tool control (joystick).
Locate the connector for the auxiliary hydraulic control beneath the work tool control (joystick).
Connect the 7X-1710 Multimeter Probe to contact 1 (P996-GN) and contact 2 (P997-BR) on the harness side of the connector.
Turn the key start switch to the ON position.Do NOT start the machine.
By using the multimeter, measure the duty cycle of the auxiliary hydraulic control.Without actuating the auxiliary hydraulic control, the duty cycle should be 50% 3%.
Actuate the right side of the auxiliary hydraulic control and measure the duty cycle.
Actuate the left side of the auxiliary hydraulic control and measure the duty cycle.Expected Result:The duty cycle should vary from 50% 3% to at least 25% in the right direction and 50% 3% to at least 75% in the left direction.Results:
OK - The duty cycles are within the range of the Expected Results. Proceed to Test Step 2.
NOT OK - The duty cycles are NOT within the range of the Expected Results. Proceed to Test Step 4.Test Step 2. CHECK THE FREQUENCY OF THE AUXILIARY HYDRAULIC CONTROL
With the auxiliary hydraulic control in the center position, measure the frequency of the auxiliary hydraulic control from contact 1 to contact 2 of the connector for the auxiliary control.Expected Result:The frequency should be between 400 Hz and 700 Hz.Results:
OK