Procedure to Install Tie-off Retrofit on Certain 990H, 990K Wheel Loaders and 844H, 844K Wheel Dozers {0679, 1122, 7323} Caterpillar

Procedure to Install Tie-off Retrofit on Certain 990H, 990K Wheel Loaders and 844H, 844K Wheel Dozers {0679, 1122, 7323}

Usage:

990K A9P

Wheel Dozer: 844H (S/N: BTW1-UP); 844K (S/N: MBE100-100; KLS201-201)
Wheel Loader: 990H (S/N: BWX1-UP); 990K (S/N: DJK201-256; A9P100-356)

Introduction

This special instruction will provide parts and procedure to install Tie-off retrofit on the machines listed above.

Safety Section

Do not perform any procedure in this Special Instruction until you have read the information and you understand the information.

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Failure to follow all safety guidelines prescribed in this document and by governing authorities and regulatory agencies may result in severe injury or death of personnel or machine damage.

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Climbing equipment may be required to access this service point. Refer to the Operation and Maintenance Manual, "Mounting and Dismounting" topic for safety information.

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Personal injury or death can result from fumes, gases and ultraviolet rays from the weld arc.
Welding can cause fumes, burn skin and produce ultraviolet rays.
Keep your head out of the fumes. Use ventilation, exhaust at the arc, or both, to keep fumes and gases from your breathing area. Wear eye, ear and body protection before working.
Protect yourself and others; read and understand this warning. Fumes and gases can be dangerous to your health. Ultraviolet rays from the weld arc can injure eyes and burn skin. Electric shock can cause death.
Read and understand the manufacturer's instructions and your employer's safety practices. Do not touch live electrical parts.
See "American National Standard Z49.1, Safety in Welding and Cutting" published by the American Welding Society.
American Welding Society
2501 N.W. 7th Street
Miami, Florida 33125

See "OSHA Safety and Health Standards, 29 CFR 1910", available from U.S. Department of Labor.
U.S. Department of Labor
Washington, D.C. 20210

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Personal injury can result from flame cutting or welding on painted areas.
The effect of gasses from burned paint is a hazard to the person doing the cutting or welding.

Do not flame cut or weld on painted areas.

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NOTICE

Before carrying out arc welding on the machine or on any equipment attached to the machine, disconnect all power and ground leads from the batteries in order to avoid possible damage to electronic components.

Required Parts

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Table 1
Required Parts
Item	Qty	Parts
1	2	293-4578 Bracket As
2	2	299-5177 Plate
3	4	8T-7038 Film
4	4	450-7011 Film

Installation Procedure

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Illustration 1	g06178647
(W1) 1.5 mm (0.06 inch) square and 6 mm (0.2 inch) fillet weld at two locations (A) Dimension is 50 mm (2.0 inch) (B) Dimension is 100 mm (3.9 inch) (1) 293-4578 Bracket As

Install the two brackets (1) by arc welding on the left and the right side of ROPS at the specified dimensions, as shown in Illustration 1.

Note: Grind and clean the welding surface before welding.

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Illustration 2	g06178648
(W2) 1.5 mm (0.06 inch) square and 6 mm (0.2 inch) fillet weld at two locations (C) Dimension is 40 ± 4 mm (1.6 ± 0.2 inch) (D) Dimension is 100 ± 4 mm (4.0 ± 0.2 inch) (2) 299-5177 Plate

Install the two plates (2) on left and right side of the ROPS by arc welding, as shown in Illustration 2.
Note: Grind and clean the welding surface before welding.
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Illustration 3 g06178649

(3) 8T-7038 Film
(4) 450-7011 Film
Affix film (3) above the tie-off point on each of the ROPS and affix film (4) below the tie-off point on each side of the ROPS, as shown in Illustration 3.