Procedure to Update the Door Power Window Assemblies on Certain 793F, 793F AC, 795F AC, and 797F Off-Highway Trucks{7308, 7310} Caterpillar

Off-Highway Truck/Tractor:

793F AC (S/N: EMD1-UP)

793F (S/N: SND1-UP; SSP1-UP; SXP1-UP; RBT1-UP)

795F AC (S/N: ERM1-UP)

795F (S/N: SNT1-UP)

797F (S/N: LAJ1-UP; WSP1-UP)

Introduction

The following special instruction provides the needed information to increase the window travel for both right and left side doors. Do not order any parts or perform any portion of the procedure until the entire special instruction has been read and understood.

Safety Information

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Personal injury or death can result from sudden machine movement. Sudden movement of the machine can cause injury to persons on or near the machine. To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.

Required Parts

Removal Procedure

1. Raise the window and remove the cab door.

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Illustration 1	g03812533
View of the door assembly

2. Remove and retain the non-metallic door trim panels and mounting hardware from the door assembly.

3. Remove 329-1955 Handle As or 329-1956 Handle As (A) and four mounting bolts. Retain all hardware.

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Illustration 2	g03815174
(B) 295 mm (11.6 inch) (C) 370.2 mm (14.57 inch) (D) 6 mm (0.24 inch) (E) 63 mm (2.5 inch) (F) Radius of 6 mm (0.24 inch)

4. Modify handle assembly (A) by cutting the plate to be as shown in Illustration 2. Prime and paint after completing the modifications.

   Note: Illustration 2 shows modifications for 329-1955 Handle As . For modifications to 329-1956 Handle As , mirror the dimensions.

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Illustration 3	g03812376
View of the bottom half of the door assembly

5. Remove the screws and disconnect the glass bracket from the regulator bracket (G). Discard the mounting hardware.

   Note: The window should be in the fully RAISED position.

6. Remove and discard the regulator mounting plate and regulator (H) from the door by removing the four mounting screws (J) located on the edges of the regulator mounting plate.

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Illustration 4	g03812748

7. Slide the glass halfway down the window frame. Remove and discard glass seal (K) from the hinge side of the window frame. Move the glass toward the rear of the door and gently remove from the door frame. Discard the glass.

   Note: Use soapy water as needed to aid in removal and installation of glass seal.

8. Repeat the entire removal procedure for the opposite side door.

Installation Procedure

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Illustration 5	g03812767

1. Install new glass (1) into the door frame by sliding the glass into the hinge side channel and then pushing the glass into the center channel.

   Note: Ensure glass (1) is orientated in such a way so that the glass label is near the lower center post of the door.

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NOTICE
Do not use retained or third-party glass as unapproved glass may create a risk for cracks or breakage.

2. Cut seal (2) to fit the entire length of the window channel on the hinge side. Apply weather strip adhesive to the back side of seal (2) and press into the window channel. Slide the window up and down while pressing or sliding seal (2) into the window channel along the entire length of the frame. Maneuver seal (2) until the seal is past the edge of the glass. Once the seal is fully installed, verify that glass (1) moves freely up and down and seal (2) remains seated.

   Note: Use soapy water as needed to aid in removal and installation of glass seal.

   Note: Seal (2) must be a continuous piece. Do not use multiple sections of seal to form the sealing edge.

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Illustration 6	g03812961

3. Install window drive assembly (3) onto plate assembly (4) using four bolts (5) and four hard washers (6) as shown in Illustration 6. Ensure plate assembly (4) slides onto the studs of the vertical rod of the window drive assembly (3). Secure the included nuts onto the studs.

4. Install plate assembly (4) onto the door frame using the retained mounting hardware.

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Illustration 7	g03812918

5. Slide glass (1) into window drive assembly (3) .

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NOTICE
Do not slide glass (1) too far into the clamps. Doing so will cause too much stress on the glass when the clamps are tightened or the window is in operation. Keep glass above indentation (L) .

6. Tighten the clamp nuts on window drive assembly (3) to 4.5 N·m (39.8 lb in).

   Note: Do not exceed 5 N·m (44.25 lb in) or the glass may crack.

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Illustration 8	g03813024

7. Install retained and modified handle assembly (A) using the retained mounting hardware.

8. Test the power window using a 24 volt battery before attaching the door panel. The window should move freely with out binding. The regulator motor should not draw more than four amps. If the motor draws more than four amps, adjust the alignment of the regulator to reduce friction on the glass.

9. Route the regulator harness through the retained non-metallic door trim panels and install the panels. Use the retained mounting hardware from the door assembly.

10. Repeat Steps 1 through 9 for the opposite door.

11. Install doors to cab and adjust strikers as needed.