ACTUATOR 1776727 - Caterpillar

Note: The 163-0096 Diagnostic and Calibration Tool can be used in order to troubleshoot this component. Refer to the "Owner's Manual" for more information.The following procedure should be used in order to troubleshoot a transducer.
Illustration 1 g00563605
Illustration 2 g00563611
Check the electrical connectors and check the wiring.
Bodily contact with electrical potential can cause bodily injury or death.To avoid the possibility of injury or death, ensure that the main power supply has been disconnected before performing any maintenance or removing any modules.
Disconnect the power supply.
Check the electrical connectors and check the wiring for damage or bad connections.
Verify that all modules are properly seated.
Verify the status of the LED on the SLC 5/04 - 5/05.The results of the preceding procedure are in the following list:
All of the components are fully installed. All of the components are free of corrosion. All of the components are free of damage. All of the modules are properly seated. Proceed to 2.
The components are not fully installed. The components are not free of corrosion. The components are damaged. All of the modules are not properly seated. Repair the component. Verify that the repair resolves the problem. STOP.
Monitor the transducer with an ammeter.
Illustration 3 g00563603
Diagram of the ammeter connection
Connect an ammeter in the circuit. See illustration 3.
Monitor the ammeter for the correct output of the transducer. See table 1 for the transducer's information.
Table 1
Current (mA)     141-9880 Transducer (1)     141-4003 Transducer (2)    
4.0    
0 kPa ( 0.0 psi)    
0 kPa (0.0 psi)    
4.5    
31.3 kPa (4.5 psi)    
125.0 kPa (18.1 psi)    
5.0    
62.5 kPa (9.1 psi)    
250.0 kPa (36.3 psi)    
5.5    
93.8 kPa (13.6 psi)    
375.0 kPa (54.4 psi)    
6.0    
125.0 kPa (18.1 psi)    
500.0 kPa (72.5 psi)    
6.5    
156.3 kPa (22.7 psi)    
625.0 kPa (90.6 psi)    
7.0    
187.5 kPa (27.2 psi)    
750.0 kPa (108.8 psi)    
7.5    
218.8 kPa (31.7 psi)    
875.0 kPa (126.9 psi)    
8.0    
250.0 kPa (36.3 psi)    
1000.0 kPa (145.0 psi)    
8.5    
281.3 kPa (40.8 psi)    
1125.0 kPa (163.1 psi)    
9.0    
312.5 kPa (45.3 psi)    
1250.0 kPa (181.3 psi)    
9.5    
343.8 kPa (49.8 psi)    
1375.0 kPa (199.4 psi)    
10.0    
375.0 kPa (54.4 psi)    
1500.0 kPa (217.5 psi)    
10.5    
406.3 kPa (58.9 psi)    
1625.0 kPa (235.6 psi)    
11.0    
437.5 kPa (63.4 psi)    
1750.0 kPa (253.8 psi)    
11.5    
468.8 kPa (68.0 psi)    
1875.0 kPa (271.9 psi)    
12.0    
500.0 kPa (72.5 psi)    
2000.0 kPa (290.0 psi)    
12.5    
531.3 kPa (77.0 psi)    
2125.0 kPa (308.1 psi)    
13.0    
562.5 kPa (81.6 psi)    
2250.0 kPa (326.3 psi)    
13.5    
593.8 kPa (86.1 psi)    
2375.0 kPa (344.4 psi)    
14.0    
625.5 kPa (90.6 psi)    
2500.0 kPa (362.5 psi)    
14.5    
656.3 kPa (95.2 psi)    
2625.0 kPa (380.6 psi)