1999/11/08 Caterpillar

D11N (4HK),
D11R (8ZR) Track-Type Tractors

Description of Change: Improved ripper lines are available to reduce hydraulic oil leaks on tubes. The metal tubes can be replaced with hoses to reduce leaks at the welded joints.

The tubes can be entirely replaced with hoses or replaced individually as needed. One tube and one hose are replaced by a single hose. Table 1 shows the parts needed to replace the entire lines group. Table 2 shows the parts needed to replace individual tubes and hoses.

Ripper Lines

(A) Tilt cylinder (rod end).

(B) Lift cylinder (head end).

(C) Lift cylinder (rod end).

(D) Tilt cylinder (head end).

(E) Tilt cylinder (rod end).

(F) Tilt cylinder (head end).

(G) Ripper valve.

(H) Lift cylinder (rod end).

(J) Lift cylinder (head end).

(K) Junction block.

(L) Ripper tilt cylinder.

(M) Ripper lift cylinder.

Use Table 2 to replace individual tubes and hoses. Replace each tube assembly and hose assembly with one hose assembly. See Illustration 1 and Table 1 for required hardware.