2007/08/20 Caterpillar

Backhoe Loader:

416E (S/N: SHA1-UP)

420E (S/N: HLS1-UP; KMW1-UP)

430E (S/N: DDT1-UP; EAT1-UP)

Description of Change: The routing of the E-stick bucket hoses has been improved. The new hose routing provides increased clearance for the bucket hoses that are routed from the bucket cylinder ends. This improved routing will prevent these hoses from being pinched or cut during retraction of the E-stick.

Adaptable To: The improved routing of the E-stick bucket hoses is adaptable to the machines that are listed in Table 1. Refer to "Rework Procedure" for additional information.

Table 1

Sales Model	Prefix/Serial Number
416E	S/N:SHA1-2121
420E	S/N:HLS1-3476
420E	S/N:KMW1-1494
430E	S/N:DDT1-487
430E	S/N:EAT1-780

The improved routing of the E-stick bucket hoses is effective with the machines that are listed in Table 2.

Table 2

Sales Model	Prefix/Serial Number
416E	S/N:SHA2122-UP
420E	S/N:HLS3477-UP
420E	S/N:KMW1495-UP
430E	S/N:DDT488-UP
430E	S/N:EAT781-UP

Rework Procedure

Illustration 1	g01404808
Extended E-stick

Illustration 2	g01404844
Retracted E-stick

1. Test the bucket hose movement by slowly extending and retracting the E-stick in the vertical position in order to ensure that the hoses have adequate clearance between the outer E-stick slider and the boom during retraction. Refer to Illustrations 1 and 2 for examples of extension and retraction of the E-stick.

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Illustration 3	g01408127
E-stick hose routing (1) Hose clamps (2) E-stick bucket hose (A) Potential pinch point

2. If interference exists, loosen hose clamps (1) and reposition the hose(s) in order to obtain adequate clearance. Reference Illustration 3 for the location of hose clamps (1) and areas that could be potential pinch points (A) for E-stick bucket hose (2) .

   Note: The hose that is routed from the rod end of the bucket cylinder is most likely to experience pinching.