Thumb Tine Assembly May Fall Inside Bucket on Certain Mini Hydraulic Excavators {6547} Caterpillar

Thumb Tine Assembly May Fall Inside Bucket on Certain Mini Hydraulic Excavators {6547} [M0065602]

WORK TOOLS

THUMB GP

Thumb Tine Assembly May Fall Inside Bucket on Certain Mini Hydraulic Excavators {6547}

1.1. Introduction

2.1. Problem

3.1. Solution

4.1. References

5.1. Rework procedure

Mini Hydraulic Excavator
305.5D (S/N: YHS1-UP; FLZ1-UP)
305.5E (S/N: YGB1-UP; FSC1-UP; FKY1-UP)
305.5E2 (S/N: FR51-UP; NC51-UP)
305.5E2 CR (S/N: EJX1-UP)
305C (S/N: HWJ1-UP; GYZ1-UP)
305D (S/N: WCJ1-UP; XER1-UP)
305E (S/N: XFA1-UP; XSC1-UP; WDL1-UP)
305E2 (S/N: BZ51-UP; DF51-UP; H5M1-UP)
305E2 CR (S/N: DJX1-UP)

Introduction

The problem that is identified below does not have a known permanent solution. Until a permanent solution is known, use the solution that is identified below.

Problem

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Illustration 1	g06009478
452-9816 Thumb Ar

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Illustration 2	g06008971
(A) 452-2728 Thumb

When 5T Mini Hydraulic Excavator is equipped with quick coupler, 452-9816 Thumb Ar, and HDC (Heavy Duty Compact) bucket, the 452-2728 Thumb (Tine) does not properly interface with HDC bucket base edge. 452-2728 Thumb (Tine) falls inside bucket not making contact with bucket base edge. 452-2728 Thumb (Tine) is not long enough to accommodate coupler and bucket offsets on the machines listed above.

Solution

AVSpare is aware of this problem and recommending to follow the below rework procedure.

References

Reference: Special Instruction, REHS1841, "General Welding Procedures".

Rework procedure

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Illustration 3	g06009023
(A) 96.4 mm (3.80 inch) (B) Radius is 15.0 mm (0.59 inch) (C) 9.0 mm (0.35 inch) (D) 57.0 mm (2.24 inch) (E) 42.1 mm (1.66 inch) (F) Radius is 5.0 mm (0.20 inch) (G) 74.8 mm (2.94 inch) (H) 160.2 mm (6.31 inch) (J) 10.0 mm (0.39 inch)

Fabricate plate as per dimension shown in Illustration ***#i06535508/i06530419.8*** .
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Illustration 4 g06009066

(K) 65.0 mm (2.56 inch)
(W1) 6.0 mm (0.24 inch) fillet weld

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Illustration 5 g06009070

(W1) 6.0 mm (0.24 inch) fillet weld
Mount plate and fillet weld on both sides in thumb assembly as per dimension shown in Illustration 4 and Illustration 5.