BRACE-CORNER 3979429 - Caterpillar

Illustration 1. Modification to 9J3997 Swing Relief Valve Group.5. Remove the 9S8004 Plug and 3J1907 Seal from the 9J3997 Swing Relief Valve. Also, remove the 9S8005 Plug, 3K360 Seal and 1P6744 Spring from the swing relief valve.6. Drill the passage below the 9S8004 Plug. Use a tap to make 1/16"-27 NPTF threads. Install a 3D4603 Pipe Plug in the passage.7. Install a 3H7675 Spring where the 1P6744 Spring had been. Install the 9S8005 Plug and a 3K360 Seal.8. Install a line between the port where the 9S8004 Plug and 3J1907 Seal were removed, and the pilot tank drain.
Illustration 2. Installation of 8J6875 Shuttle Valve, tees and lines.