Installing Engine Damper Guards on Certain D9T Track-Type Tractors {1205, 7150} Caterpillar

Installing Engine Damper Guards on Certain D9T Track-Type Tractors {1205, 7150}

Usage:

D9T REX

Track-Type Tractor: D9T (S/N: TWG1-UP; RJS1-UP; REX1-UP)

Introduction

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

This Special Instruction provides the procedure for installing engine damper guards on certain D9T Track-Type Tractors.

Safety Section

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Do not attempt to disassemble or assemble this machine until you read and understand the disassembly and assembly instructions. Improper disassembly and assembly procedures could result in injury or death.

Required Parts

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Table 1
Required Parts for (S/N: REX) Machines
Item	Qty	Part Number	Description
1	1	489-8201	Damper Guard As
2	1	213-3199	Damper (Finned) (If Required)
3	1	489-8202	Template (If Required)⁽¹⁾
4	4	8T-4121	Hard Washer
5	4	8T-4195	Bolt

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Table 2
Required Parts for (S/N: TWG; RJS) Machines
Item	Qty	Part Number	Description
1	1	489-8200	Damper Guard As
2	1	167-8130	Damper (Non-Finned) (If Required)
3	1	489-8202	Template (If Required)⁽¹⁾
4	4	8T-4121	Hard Washer
5	4	8T-4195	Bolt

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⁽¹⁾	The template is only required for (S/N: RJS) D9Ts, (S/N: TWG) D9Ts with engine (S/N: TXW1-2420), and (S/N: REX) D9Tswith engine (S/N: RDP1-3464)

Installation Procedure

Lower and Remove the front hinged bottom guard and remove the chin guard. Remove debris from guards.
Remove engine damper (2).
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Illustration 1 g06037543

(2) Damper
Inspect damper (2) for damage. Look for leaks, worn welds, worn corners, or dents. If desired, use ultrasonic measuring equipment to determine the thickness of the damper case. Damper guard (1) is approximately 6 mm (0.24 inch) thick when new. Guard (1) should be at least 5 mm (0.20 inch) thick to reuse. Damper case (2) is approximately 4 mm (0.16 inch) thick when new and should be at least 3.5 mm (0.14 inch) thick to reuse.
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Illustration 2 g06038094

(A) Large hole
(3) Template
Clean the front engine mounting area. If engine already has mounting holes, skip to Step 6. If the engine does not have mounting holes use template (3) to mark four holes to be drilled and tapped. Large hole (A) in template (3) should be roughly concentric with the hole in the front engine mount.
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Illustration 3 g06038088

(B) Four drilled and tapped holes
(C) Reversing fan P-clips
Drill four holes (B) using a 8.5 mm (0.335 inch) or 21/64 drill bit. Thread four holes using a M10-1.5 tap.
Note: The reversing fan line P-clips (C) may need to be loosened and the hose pulled aside for clearance to position drill.
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Illustration 4 g06038111

(1) Damper guard assembly
(2) Damper

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Illustration 5 g06038141

(1) Damper guard assembly
(2) Damper
Reinstall damper (2) and install damper guard assembly (1) using four washers (4) and four bolts (5). Tighten bolts (5) to a torque of 55 ± 10 N·m (40 ± 7 lb ft). Check for the proper clearance around damper (2) and guard (1).
Reinstall the bottom guards.