January 01, 2013
Valve Body Xpress
Torque valve body bolts in sequence to 80-106 in-lbs
To identify the correct valve body for your application, look for the first four to five rough forging numbers on the pump body. The numbers will be RF F4, RF F8, or RF XF1. See the black arrows for location of the casting numbers.
The late-model 4F50N will have a square hole in the pump cover. See the red arrow for location.
|AX4N, '94-'98||AX4N/4F50N, '98-'03|
|Rough Forging Number: RF F4||Rough Forging Number: RF F8 or RF XF1|
|Casting Number: RF1P|