S 434-041
 (1)  Apply hydraulic lubricant or hydraulic fluid to the O-rings and the threads of the differential pressure indicator.
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 S 434-042
 (2)
Install the new O-rings on the differential pressure indicator.

 S 434-043

 (3)  
Remove the cap from the opening in the filter module.

 S 424-044

 (4)
Install the differential pressure indicator in the filter module.

 S 434-045

 (5)
Tighten the differential pressure indicator to 125-150 pound-inches.

 H. Install the Pressure Switch (Fig. 401)
 S 644-056
 (1)  
Apply hydraulic lubricant or hydraulic fluid to the O-ring and the threads of the pressure switch.

 S 434-057

 (2)  
Remove the cap from the opening in the filter module.

 S 424-058

 (3)  
Install the pressure switch on the filter module.

 S 434-059

 (4)  
Tighten the pressure switch to 160-175 pound-inches.

 S 434-060

 (5)  
Connect the electrical connector to the pressure switch.

 S 434-061

 (6)  
Safety the pressure switch and the electrical connector with a lockwire.

 I. Install the Check Valve (Fig. 401)
 S 644-062
 (1)  
Apply hydraulic lubricant or hydraulic fluid to the O-rings, backup rings, and the threads of the check valve.

 (2)  
Install the O-rings and the backup rings on the check valve.

 (3)  
Remove the cap from the opening in the filter module.

 (4)  
Install the check valve on the filter module.

 (5)
Tighten the check valve for the case drain to 100-125 pound-inches.

 S 434-063
 S 434-064
 S 424-065
 S 434-066
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