LOCK 5M5779 - Caterpillar

Procedure to Check the Fuel Ratio Control
Table 1
Required Tools    
Part Number     Part Description     Qty    
195-0761     Vacuum Pump Gp     1    
Illustration 1 g00769604
To check the diaphragm of the fuel ratio control for damage, attach a tube from the 195-0761 Vacuum Pump Gp to fitting (1) on fuel ratio control (2) .Note: If the air can be regulated according to this procedure, an alternate source of air can be used.
Use the vacuum pump to apply 48 to 55 kPa (7 to 8 psi) of pressure to the fuel ratio control. Ensure that there are no leaks in the hose or the vacuum pump. If the pressure drops within 30 seconds, the fuel ratio control is damaged.Use the following procedures to replace the fuel ratio control.Removal Procedure
Table 2
Required Tools    
Part Number     Part Description     Qty    
1P-2852     Spanner Wrench     1    
171-1085     Tamper Resistant Tool Gp     1    
Remove the fuel injection pump from the engine. Refer to the appropriate Service Manual for the correct procedures.Note: If the fuel injection pump can be easily accessed on the engine, there is no need to remove the fuel injection pump.
Illustration 2 g00769611
Note: Some fuel injection pumps may be equipped with a shield that is installed around fuel ratio control (2). The shield may be held in position with tamperproof bolts. Use the 171-1085 Tamper Resistant Tool Gp to remove the shield. It is not necessary to reinstall the shield on the fuel injection pump after the shield is removed.
Remove the 116-8648 Ring (3) in order to disconnect the rod from the fuel injection pump lever.
Illustration 3 g00769617
Loosen spanner nut (5) with the 1P-2852 Spanner Wrench while you hold fuel ratio control (2) in position.
Remove fuel ratio control (2) from bracket (4) on the fuel injection pump.Installation Procedure
Table 3
Required Tools    
Part Number     Part Description     Qty    
1P-2852     Spanner Wrench     1    
Illustration 4 g00769617
Put fuel ratio control (2) in position on bracket (4) .
Install spanner nut (5) onto fuel ratio control (2) with the 1P-2852 Spanner Wrench while you hold the fuel ratio control in position.
Illustration 5 g00769611
Insert the rod from fuel ratio control (2) into the fuel injection pump lever and install the 116-8648 Ring (3) .
Install the fuel injection pump on the engine. Refer to the appropriate Service Manual for the correct procedures.