FILTER-DEF 5079126 - Caterpillar

Table 1
Required Parts    
Part    Part No.    Description    Qty.    
A     255-6598     Control Valve Gp     1    
B     255-6599     Check Valve Gp     1    
C     274-1330     Bolts     4    
Illustration 1 g03337300
(A) 255-6598 Control Valve Gp (B) 255-6599 Check Valve Gp (C) 274-1330 Bolt
Illustration 2 g03383711
Typical of the 255-6598 Control Valve Gp
Illustration 3 g03383712
Typical of the 255-6599 Check Valve Gp
Illustration 4 g03370338
(A) 255-6598 Control Valve Gp (B) 255-6599 Check Valve Gp (D) Anti-Slab CylindersThe new 255-6598 Control Valve Gp will replace the current 255-6597 Control Valve Gp. A new 255-6599 Check Valve Gp will be added between the coil valve and the cylinders.
Remove the four 127-4832 Bolts holding the 255-6597 Control Valve Gp. Use a 4 mm (0.16 inch) hex key.
Install the new 255-6599 Check Valve Gp (B) .
Install the new 255-6598 Valve (A) .
Use four new 274-1330 Bolts (C) to secure the new valves. Torque bolts to 8 N m (6 lb ft). Use a 4 mm (0.16 inch) hex key.