- Off-Highway Truck/Tractor
- 777G (S/N: GT71-182; T5A1-123; TNM1-749; RDR1-507; T4Y1-191)
Reference: Disassembly and Assembly, RENR8300, Fan - Remove and Install
Reference: Disassembly and Assembly, KENR8739, Fan - Remove and Install
Reference: Disassembly and Assembly, RENR8300, Belt Tensioner - Remove and Install
Reference: Disassembly and Assembly, KENR8739, Belt Tensioner - Remove and Install
Reference: Disassembly and Assembly, RENR8300, Fan Drive - Remove
Reference: Disassembly and Assembly, KENR8739, Fan Drive - Remove
Reference: Disassembly and Assembly, RENR8300, Fan Drive - Install
Reference: Disassembly and Assembly, KENR8739, Fan Drive - Install
Introduction
This special instruction contains procedure to install an improved fan drive assembly on the machines listed above.
Do not perform any procedure in this Special Instruction until you have read the information and you understand the information.
Caterpillar Channel 1 Videos
For supplemental information on this procedure, refer to the following video. The previous training has been replaced with the video below.
Note: A CWS login is required to access Caterpillar Channel 1. Scan the QR code below with a QR enabled device or copy the link that follows.
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| Illustration 1 | g06306276 |
Safety Section
Improper operation, lubrication, maintenance, or repair of this product can be dangerous and could result in injury or death.
The information, specifications, and illustrations in this publication are based on information that was available at the time that the publication was written. The specifications, torques, pressures, measurements, adjustments, illustrations, and other items can change at any time. These changes can affect the service that is given to the product. Obtain the complete and most current information before you start any job. Cat dealers have the most current information available.
Work safely. Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs. A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools to perform these functions properly.
Safety precautions and warnings are provided in this instruction and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard.
Therefore, the warnings in this publication and the warnings that are on the product are not all inclusive. If the tools, the procedure, the work method, or your actions are not recommended by Caterpillar, ensure that the tools and your actions are safe for you and for others.
Ensure that all personnel are safe when using a tool, procedure, work method, or operating technique not recommended by Caterpillar. Ensure that the product will not be damaged or the product made unsafe by the operation, lubrication, maintenance, or the repair procedures that are used.
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Before service work is begun, park the machine on a hard level surface. Block the wheels of the machine so unexpected movement will not occur. Unexpected movement of the machine can cause personal injury or death. |
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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. |
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Do not operate or work on this machine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manuals. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Cat dealer for replacement manuals. Proper care is your responsibility. |
Graphic Color Description
Color-coding of targeted components, or sections of a part, is used to communicate a required action.
The descriptions below illustrate the different colors and what is represented when used in a graphic.
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(Blue) The primary component of focus for a particular step. Target or primary component to be installed or removed. Installation implied unless otherwise noted with a symbol. |
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(CAT® Yellow) Description of parts. |
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(Yellow) Components placed aside for access, but not removed. Highlighted areas of adjustment, inspection, or special attention. |
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(Cyan) Special tools or other equipment required for use in a particular step. |
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(Light Gray) Components used for reference. |
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(Magenta) Any fastener, retainer, or electrical connector used to install or remove the primary component. |
Graphic Symbol Description
This section includes all the symbol graphics used throughout the Visual Service Procedure (VSP), along with a brief description of what the symbol represents.
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Connect - To place in an electrical circuit. To join or fasten together. |
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Discard, Do Not Reuse - To cast aside as useless or undesirable in approved and responsible manner. |
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Disconnect - To remove from an electrical circuit. To separate. |
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Keep, Store - To retain for reinstallation or reuse. |
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Loosen - To make less tight. To set free. To release. |
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Remove - To take off. |
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Replace - To restore, or return, to a former or proper place. |
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Service Indicator - Refer to a Technical Manual, Warning, Caution, or Notice |
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Tighten - To make nearer to fully stretched, without slack, to apply tension or torque. |
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Weight - |
English (SAE) Fasteners
The following table has the recommended standard torque values.
| Nuts and Bolts | ||
|---|---|---|
| Thread Size
Inch |
Standard Torque | |
| 1/4 | |
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| 5/16 | |
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| 3/8 | |
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| 7/16 | |
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| 1/2 | |
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| 9/16 | |
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| 5/8 | |
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| 3/4 | |
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| 7/8 | |
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| 1 | |
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| 1 1/8 | |
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| 1 1/4 | |
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| 1 3/8 | |
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| 1 1/2 | |
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Metric (ISO) Fasteners
The following table has the recommended standard torque values.
| Nuts and Bolts | ||
|---|---|---|
| Thread Size
Metric |
Standard Torque | |
| M6 | |
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| M8 | |
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| M10 | |
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| M12 | |
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| M14 | |
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| M16 | |
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| M20 | |
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| M24 | |
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| M30 | |
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| M36 | |
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Required Parts
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| Illustration 2 | g06230361 |
| Parts List | ||||
| Item | Qty | New Part Number | Description | Illustration (Sub-step) Location |
| 1 | 3 | Taperlock Stud | Illustration 12 (1) | |
| 2 | 3 | Hard Washer | Illustration 13 (2) | |
| 3 | 1 | O-Ring Seal | Illustration 14 (2) | |
| 4 | 1 | O-Ring Seal | Illustration 14 (4) | |
| 5 | 2 | O-Ring Seal | Illustration 14 (6) | |
| 6 | 1 | O-Ring Seal | Illustration 14 (7) | |
| 7 | 1 | Fan Drive Gp | Illustration 14 (1), 15 (1) | |
| 8 | 1 | O-Ring Seal | Illustration 16 (1) | |
| 9 | 1 | O-Ring Seal | Illustration 16 (3) | |
| 10 | 8 | Bolt | Illustration 19 (3) | |
Rework Procedure
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| Illustration 3 | g06230362 |
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Refer to Disassembly and Assembly, RENR8300, Fan - Remove and Install. Refer to Disassembly and Assembly, KENR8739, Fan - Remove and Install. | |
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| Illustration 4 | g06231377 |
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Refer to Disassembly and Assembly, RENR8300, Fan - Remove and Install. Refer to Disassembly and Assembly, KENR8739, Fan - Remove and Install. | |
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| Illustration 5 | g06230365 |
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Refer to Disassembly and Assembly, RENR8300, Fan - Remove and Install. Refer to Disassembly and Assembly, KENR8739, Fan - Remove and Install. | |
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| Illustration 6 | g06231380 |
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Refer to Disassembly and Assembly, RENR8300, Belt Tensioner - Remove and Install. Refer to Disassembly and Assembly, KENR8739, Belt Tensioner - Remove and Install. | |
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| Illustration 7 | g06230367 |
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Refer to Disassembly and Assembly, RENR8300, Fan Drive - Remove. Refer to Disassembly and Assembly, KENR8739, Fan Drive - Remove. | |
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| Illustration 8 | g06230370 |
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| Illustration 9 | g06231385 |
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Refer to Disassembly and Assembly, RENR8300, Fan Drive - Remove. Refer to Disassembly and Assembly, KENR8739, Fan Drive - Remove. | |
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| Illustration 10 | g06230371 |
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Remove and save the fan bracket, springs, pulley, and hardware as a unit. | |
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| Illustration 11 | g06230376 |
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| Illustration 12 | g06230377 |
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| Illustration 13 | g06230378 |
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Install the fan bracket, springs, pulley, and hardware as a unit. | |
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| Illustration 14 | g06230381 |
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Transfer the hydraulic fittings from the former fan drive to new | |
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| Illustration 15 | g06230384 |
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Refer to Disassembly and Assembly, RENR8300, Fan Drive - Install. Refer to Disassembly and Assembly, KENR8739, Fan Drive - Install. | |
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| Illustration 16 | g06230386 |
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| Illustration 17 | g06230389 |
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| Illustration 18 | g06230393 |
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Refer to Disassembly and Assembly, RENR8300, Fan Drive - Install. Refer to Disassembly and Assembly, KENR8739, Fan Drive - Install. | |
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| Illustration 19 | g06230394 |
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Refer to Disassembly and Assembly, RENR8300, Fan - Remove and Install Refer to Disassembly and Assembly, KENR8739, Fan - Remove and Install Refer to Disassembly and Assembly, RENR8300, Belt Tensioner - Remove and Install. Refer to Disassembly and Assembly, KENR8739, Belt Tensioner - Remove and Install. | |
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| Illustration 20 | g06230395 |
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Refer to Disassembly and Assembly, RENR8300, Fan - Remove and Install Refer to Disassembly and Assembly, KENR8739, Fan - Remove and Install | |
Test the machine for proper fan system operation and verify that no leaks are present.