New Hose Assembly in the Hydraulic Lines Group Is Now Used on Certain 120M and 120M Series 2 Motor Graders {5057} Caterpillar

Motor Grader

120M (S/N: PJB1-UP; B9C1-1495; R9C1-UP; NJD1-UP; B9N1-UP; CBS1-UP; B9W1-UP; D9W1-532; RMY1-921)

120M Series 2 (S/N: M921-106; M9C1-994; M9H1-606; R9N1-222; R9W1-212)

12M (S/N: R9B1-UP; B9F1-1496; B9R1-UP)

Description Of Change: A new hose assembly in the hydraulic lines group is now used on the machines listed above. The new hose has been designed for improved durability and improved service life. The new hose replaces the existing tube.

Adaptable To: The following changes are adaptable to machines within the listed serial numbers, and are effective with all machines after the listed serial numbers.

Show/hide table

Personal injury can result from hydraulic oil pressure and hot oil. Hydraulic oil pressure can remain in the hydraulic system after the engine has been stopped. Serious injury can be caused if this pressure is not released before any service is done on the hydraulic system. Make sure all of the work tools have been lowered to the ground, and the oil is cool before removing any components or lines. Remove the oil filler cap only when the engine is stopped, and the filler cap is cool enough to touch with your bare hand.

Illustration 1	g06342970

Illustration 2	g06349493
Detailed view of area A (1) 565-2512 Hose As (A) 5K-9090 O-Ring Seal (B) 163-3098 Fitting (C) 8T-4196 Bolt (D) 8T-4121 Hard Washer (E) 8C-3206 Half Flange (F) 4J-0520 O-Ring Seal

Replace the existing tube with the new hose assembly (1) as shown in Illustration 2.

Install the new hose assembly (1) in the pump lines group with the parts listed in Table 2.