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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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Hot hydraulic oil under high pressure can remain in the components of the hydraulic system or the power train system after the engine has been stopped. The uncontrolled release of the hydraulic oil can cause sudden machine movement and can also result in the following conditions:
If hydraulic oil penetrates body tissue, the injury must be treated immediately by a doctor who is familiar with this type of injury. Use a board or a piece of cardboard to check for a hydraulic oil leak. Make sure that all of the attachments have been lowered to the ground and that all trapped pressure has been released from the hydraulic system and the power train system. Also, make sure that the hydraulic oil is cool before the removal of any components or lines. Remove the hydraulic oil filler cap only when the engine is stopped and the filler cap is cool enough to touch with your bare hand. |
| NOTICE |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, PERJ1017, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products. Dispose of all fluids according to local regulations and mandates. |
| "Travel Motor - Test (Measurement of Case Drain Oil)" | |||
|---|---|---|---|
| Machine Settings | Crossover Relief Pressure | Engine Speed | |
| |
Engine speed dial "10" | ||
| Item | Specification(1) | Left Travel | Right Travel |
| New Travel Motor | |
1. | 1. |
| 2. | 2. | ||
| 3. | 3. | ||
| Rebuilt Travel Motor | |
1. | 1. |
| 2. | 2. | ||
| 3. | 3. | ||
| (1) | Maximum acceptable flow |
| |
| Illustration 1 | g06614635 |
| (2) Case drain hose | |
| Torque Specification | ||
| Item | Part | Torque |
| (2) | Hose (13/16 ORFS) | |
Reference: Refer to the Operation and Maintenance Manual , "System Pressure Release" for the detailed procedure to release the system pressure.
Reference: Refer to the Operation and Maintenance Manual , "Prepare the Machine for Maintenance".
Reference: Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Reference: Specifications, SENR3130, "Torque Specifications"
Use the following procedure to measure the case drain of the travel motors.
| NOTICE |
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Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids. Refer to Special Publication, PERJ1017, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat® products. Dispose of all fluids according to local regulations and mandates. |
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| Illustration 2 | g06221007 |
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Tooling (T1) 198-4240 Digital Pressure Indicator Gp | |
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| Illustration 3 | g06615632 |
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Tooling group (T2) | |
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| Illustration 4 | g06349906 |
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Tooling (T3) 311-1362 Vacuum Gauge Gp | |
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| Illustration 5 | g06615249 |
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Tooling (T4) 418-3611 Track Block | |
| Required Tools | ||||
|---|---|---|---|---|
| Item | Qty | Part Number | Part Name | |
| T1 | 1 | 198-4240 | Digital Pressure Indicator Gp | |
| T1a | 1 | 198-4234 | Digital Indicator | |
| T1b | 1 | 198-4237 | Pressure Sensor Gp ( |
|
| T1b | 1 | 198-4238 | Pressure Sensor Gp( |
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| T1b | 1 | 198-4239 | Pressure Sensor Gp (1)
( |
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| T1b | 1 | 251-9600 | Pressure Sensor Gp(2)
( |
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| T1c | 1 | 198-4236 | Adapter Cable As | |
| T2 | T2a | 1 | 6V-7788 | Flow Meter
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| T2b | 1 | 8C-6874 | Reducer | |
| T2c | 1 | 6V-9746 | O-Ring Seal | |
| T2d | 1 | 124-1901 | Permanent Coupling | |
| T2e | 3 ft | 122-6870 | Bulk Hydraulic Hose | |
| T2f | 1 | 124-2147 | Permanent Coupling | |
| T2g | 1 | 6V-8942 | O-Ring Reducer | |
| T2h | 1 | 6V-8556 | Nut | |
| T2j | 2 | 6V-8398 | O-Ring Seal | |
| T3 | 1 | 311-1362 | Vacuum Cap | |
| T4 | 1 | 418-3611 | Track Block | |
| (1) | This sensor must be purchased separately, this sensor is not included in the 198-4240 Digital Pressure Indicator Gp. |
| (2) | This sensor can only be used on large diameter pressure taps like 187-3547 Fitting. |
- Position the machine on level ground.
Show/hide table
Illustration 6 g06435323 (T1) Track block
(1) Sprocket - Insert track blocks (T1) to the right and left travel motors.
- Stop the engine.
- Release the pressure in the hydraulic system. Refer to Operation and Maintenance Manual, "System Pressure Release".
- Attach vacuum cap (T3) onto the hydraulic tank. Attach an air supply hose onto the assembly. Apply
276 to 414 kPa (40 to 60 psi) . This procedure will pull a vacuum on the hydraulic system.Show/hide table
Illustration 7 g06615686 Flow Meter Tool Layout
Tooling (T2)
( 2) Case drain hose
(3) Connector
(4) Travel motor - Install the following tools in accordance with the flow meter tool layout. Refer to Illustration 7.
- Disconnect case drain hose (2) from connector (3).
- Connect the flow meter assembly (T2) between connector (3) and case drain hose (2).
Note: Correct orientation of the flow meter is necessary. The oil flows from travel motor (4) to case drain hose (2).
- Remove vacuum cap (T3).
- Start the engine.
- Increase the hydraulic oil temperature to
55° ± 5°C (131° ± 9°F) . - Place the machine controls at the following settings: engine speed dial "10".
- Place the hydraulic activation control lever in the UNLOCKED position.
- Move the left travel lever to full FORWARD position and check the flow of oil through the flow meter. Refer to Table 1.
- Remove track block (T1) from sprocket (1).
- Move the left travel lever in order to reposition the travel motor.
- Place track block (T1) in sprocket (1) in order to block forward left travel.
- Repeat Steps 5 through 8 in order to obtain three measurements of case drain oil.