Retrofitting Cab Tilt Pins and New Non-metallic Bushings on Certain D7E Track-Type Tractors {7266} Caterpillar

Track-Type Tractor

D7E (S/N: HKA1-482; TJA1-1205; MDB1-UP; SCG1-UP; SSH1-390; TAN1-1347)

Introduction

This Special Instruction contains the instructions on replacing the cab tilt pins and non-metallic bushings for the D7E Track-Type Tractors listed above.

Note: Machines with serial numbers (S/N: SSH379-390) and (S/N: HKA473-482) need ONLY to perform the rework procedure that pertains to the Cab side only. The machine frame side rework is not needed.

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

Reference Section

Reference: Disassembly and Assembly, KENR5612, Cab - Remove and Install (S/N: TJA; TAN)

Reference: Disassembly and Assembly, KENR5166, Cab - Remove and Install (S/N: SCG; MDB)

Reference: Disassembly and Assembly, UENR4068, Cab - Remove and Install (S/N: HKA; SSH)

Required Parts

Removal Procedure

Note: Perform the following procedure if the cab pins are seized and difficult to remove.

1. Support the cab. Refer to the "Removal Procedure" in the Disassembly and Assembly procedure for the machine.
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   Illustration 1	g03865915

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   Illustration 2	g03865923
   View of area A

2. Cut the pin in two places as shown in Illustration 2 using a reciprocating saw.

3. Remove the cab.
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   NOTICE
   Using excessive heat may decertify the Roll Over Protection Structure (ROPS)

4. Remove the pins from the joint.

Installation Procedure

Note: Perform the following procedure for installing the non-metallic bushings in the tilt frame pin bushing joint on the right-hand and left-hand side.

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Illustration 3	g06153069

1. With the cab and tilt frame removed and placed on stand, the pin holes in the sub-rops plates and tilt frame will be bored to 38.48 ± 0.05 mm (1.515 ± 0.002 inch)

2. Perform the following steps for the right-hand side.
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   Illustration 4	g06153075

   1. Sub-rops brackets can be bored on the chassis using a portable machine with a 31.75 mm (1.25 inch) boring bar 1.83 m (6 ft) long.
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      Illustration 5	g06153083

   2. Bore the pin holes on of the tilt frame while the cab and the tilt frame are on stands using a portable boring machine.

      Note: A total of eight bushings (3) are used on the right-hand side.

   3. Install two bushings (3) per bore in the sub-rops.

   4. Install one bushing (3) per bore on the tilt frame.

3. Perform the following steps for the left-hand side.
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   Illustration 6	g06153095

   1. Bore the pin holes on of the tilt frame while the cab and the tilt frame are on stands using a portable boring machine. Need to make four setups due to the viscous cab mounts. The bores on each side will not be aligned.

      Note: A total of four bushings (4) are used on the right-hand side.

   2. Install one bushing (4) per tilt frame bore.

4. Install the cab using pins (1) for the left-hand side and pins (2) for the right-hand side. Refer to the "Installation Procedure" in the Disassembly and Assembly procedure for the machine.