- Off-Highway Truck/Tractor:
- 777F (S/N: JRP1-UP; JXP1-UP)
Description of Change: Two new tube assemblies replace the four former hose assemblies in the hydraulic oil lines group. The two new tube assemblies and the new bracket will reduce the weight of the assembly and strengthen the mounting.
The new design will reduce the possibility that the clips on the new hose assemblies will loosen or fall off. The new design will help reduce rubbing between the hoses in the hydraulic oil lines group and the transmission oil lines group.
Adaptable To: One new 425-0469 Tube As supersedes the former 305-7075 Tube As. The new tube assembly supplies oil to the rod end of the hoist cylinders.
One new 425-0470 Tube As supersedes the former 305-7074 Tube As. The new tube assembly supplies oil to the head end of the hoist cylinders.
The new 425-0471 Bracket supersedes the former 378-1227 Bracket. The new bracket supports the new 425-0469 Tube As and the new 425-0470 Tube As .
The three new parts are part of the 266-7223 Hydraulic Oil Lines Gp .
The new parts are adaptable to machines JRP1-UP, JXP1-UP, and WTK1-UP.
For a complete list of material and the correct procedure that is needed in order to update the hydraulic oil lines group to the current configuration, refer to Special Instruction, REHS6051, "Field Procedure to Update the Hydraulic Oil Lines Group". The special instruction can be found on the Caterpillar service information system (SIS) and through the normal literature distribution system at your local Cat dealer.