- Motor Grader:
- 24H (S/N: 7KK1-UP)
ReferenceSystem Operations, Testing and Adjusting, SENR1429, "24H Motor Grader Hydraulic and Steering System", "Machine preparation for Troubleshooting"
ReferenceSystem Operations, Testing and Adjusting, SENR1429, "24H Motor Grader Hydraulic and Steering System", "General Information"
When the 121-9270 Gerotor Motor fails in the field, the 122-8503 Drive Link may have failed. If this happened, you must replace the 121-9270 Gerotor Motor .
You can install one 112-9049 Flow Divider Valve to the 142-2310 Front Lines Gp. This will evenly divide the flow of oil to each 121-9270 Gerotor Motor. The controlled flow will ensure that each motor is properly working in parallel operation with the other motor. This will prevent either motor from placing a mechanical load on the second motor. The flow divider valve became effective in production with the machine 7KK365-UP.
| Needed Parts for the Installation of the 112-9049 Flow Divider Valve | |||
| Item | Qty | Part Number | Description |
| 1 | 2 | 260-9219 (1) | Connector As |
| 2 | 2 | 8T-6466 | Bolts |
| 3 | 1 | 302-6323 | Bracket |
| 4 | 7 | 8T-4121 | Hard Washers |
| 5 | 2 | 8T-0644 | Bolts |
| 6 | 1 | 112-9049 | Flow Divider Valve |
| 7 | 2 | 3D-2824 | O-Ring Seals |
| 8 | 2 | 8T-5429 | Elbow |
| 9 | 1 | 2S-4078 | O-Ring Seal |
| 10 | 1 | 7X-2470 | Adapter |
| 11 | 1 | 7M-8485 | O-Ring Seal |
| 12 | 1 | 6V-8716 | Connector |
| 13 | 1 | 6V-9746 | O-Ring Seal |
| 14 | 1 | 299-2275 | Hose As |
| 15 | 1 | 299-2274 | Hose As |
| 16 | 1 | 299-2273 | Hose As |
| 17 | 1 | 3G-8047 | Grommet |
| 18 | 1 | 3G-8054 | Clip |
| 19 | 1 | 3G-8057 | Clip |
| 20 | 2 | 8T-4136 | Bolts |
| 21 | 3 | 8T-4133 | Nuts |
| ( 1 ) | Nonserviceable at this level |
| Serviced Parts for the 260-9219 Connector As | |||
| Item | Qty | Part Number | Description |
| 22 | 2 | 6V-8638 | Connector |
| 23 | 2 | 228-7090 | O-Ring Seal |
| 24 | 2 | 238-5081 | O-Ring Seal |
| Parts that Must be Removed | |||
| Item | Qty | Part Number | Description |
| 25 | 1 | 124-6402 | Hose As |
| 26 | 4 | 6V-8398 | O-Ring Seals |
| 27 | 2 | 6V-8638 | Connectors |
| 28 | 2 | 2M-9780 | O-Ring Seals |
| 29 | 1 | 124-6400 | Hose As |
| 30 | 1 | 124-6401 | Hose As |
| 31 | 2 | 6V-9746 | O-Ring Seals |
| 32 | 1 | 6V-9874 | Connector |
| 33 | 3 | 3K-0360 | O-Ring Seals |
| 34 | 2 | 6V-8639 | Connectors |
| 35 | 2 | 8T-5436 | Bolts |
| 36 | 2 | 2B-0941 | Spacers |
| 37 | 1 | 9D-7198 | Junction Block |
| 38 | 2 | 8T-4121 | Hard Washers |
Refer to Table 1 and Table 2 for the parts that are needed in order to install the new 112-9049 Flow Divider Valve. Use the following procedure in order to install the new 112-9049 Flow Divider Valve .
- Read the instructions and follow the instructions in System Operations, Testing and Adjusting, SENR1429, "24H Motor Grader Hydraulic and Steering System", "Machine preparation for Troubleshooting" and System Operations, Testing and Adjusting, SENR1429, "24H Motor Grader Hydraulic and Steering System", "General Information".
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Personal injury or death can result from sudden machine movement. Sudden movement of the machine or release of oil under pressure can cause injury to persons on or near the machine. To help prevent possible injury, perform the procedure that follows before testing and adjusting the hydraulic and steering system: |
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Check valves in the hydraulic system may allow pressure to exist in the hydraulic lines after the engine has been stopped. Pressure must be relieved prior to servicing the components of the hydraulic system. Failure to relieve pressure prior to servicing may result in personal injury. |
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| NOTICE |
|---|
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, NENG2500, "Caterpillar Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Caterpillar products. Dispose of all fluids according to local regulations and mandates. |
- Remove the 124-6402 Hose As (25) from the 9D-7198 Junction Block (37). Remove the two 6V-8398 O-Ring Seals (26) for the hose.
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| Illustration 1 | g01275670 |
- Remove the 6V-8638 Connector (27) from the other end of the hose. One 2M-9780 O-Ring Seal (28) will be on the connector.
- Remove the 124-6400 Hose As (29) from the 9D-7198 Junction Block (37). Remove the two 6V-8398 O-Ring Seals (26) for the hose.
- Remove the 6V-8638 Connector (27) from the other end of the hose. One 2M-9780 O-Ring Seal (28) will be on the connector.
- Remove the 124-6401 Hose As (30) from the 9D-7198 Junction Block (37). Remove the two 6V-9746 O-Ring Seals (31) for the hose.
- The following parts will be on the 9D-7198 Junction Block (37) .
- Remove the two 8T-5436 Bolts (35), the two 8T-4121 Hard Washers (38) and the two 2B-0941 Spacers (36) from the 9D-7198 Junction Block (37). Remove the top junction block. Discard the two bolts (35) and the two spacers (36) .
Install one 8T-4121 Hard Washer (38) onto each 8T-6466 Bolt (2). Install the bolts and the washers onto the remaining junction block.
- Refer to Illustration 2. Position the 302-6323 Bracket (3) on the drawbar. By using a 6 mm (0.24 inch) fillet weld (W1) on each end of the bracket, weld the bracket to the drawbar.
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| Illustration 2 | g01353787 |
View A-A (W1) 6 mm (0.24 inch) fillet weld | |
- A bar must be added to the drawbar assembly in order to prevent rubs across the middle plate. You must manufacture the bar. The bar is a nonserviceable item. Manufacture the bar to the dimensions in Illustration 3.
Refer to Illustration 4. Position the bar on the plate. By using a 6 mm (0.24 inch) fillet weld (W2) on three sides of the bar, attach the bar to the plate. Use a welding electrode that meets the following specifications.
- AWS A5.18
- AWS A5.20
- AWS A5.17
- AWS A5.18
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| Illustration 3 | g01353788 |
(A) The hole diameter is 8.7 mm (0.3 inch). Tap the hole to M10 X 1.5 THD. (B) 66 mm (2.6 inch) (C) 46 mm (1.8 inch) (D) 40 mm (1.6 inch) (E) 15 mm (0.6 inch) (F) 16 mm (0.6 inch) | |
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| Illustration 4 | g01353983 |
- Install one 8T-4121 Hard Washer (4) onto each 8T-0644 Bolt (5). Install the bolts to the 112-9049 Flow Divider Valve (6). Install one 8T-4121 Hard Washer (4) and one 8T-4133 Nut (21) to the bottom of each bolt.
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| Illustration 5 | g01354028 |
- Install one 3D-2824 O-Ring Seal (7) onto both 8T-5429 Elbows (8). Install the elbows and the O-ring seals to the 112-9049 Flow Divider Valve (6) .
- Install one 2S-4078 O-Ring Seal (9) onto the 7X-2470 Adapter (10). Install the adapter onto the 112-9049 Flow Divider Valve (6) .
- Install one 7M-8485 O-Ring Seal (11) onto the 6V-8716 Connector (12). Install the connector onto the 7X-2470 Adapter (10). Install one 6V-9746 O-Ring Seal (13) to the connector. Install the 299-2275 Hose As (14) to the connector.
- Install the straight end of the 299-2274 Hose As (15) to the elbow that points toward the circle drive motor toward the front of the machine. Install the one end of the 299-2273 Hose As (16) to the elbow that points to the circle drive motor toward the back of the machine. Route the hose through the hole in the plate to the circle drive motor toward the back of the machine.
- Install one 238-5081 O-Ring Seal (24) to the ends of two 6V-8638 Connectors (22) that contain the 13/16 - 16 threads. Install one 228-7090 O-Ring Seal (23) to the other end of the two connectors.
- Install one of the 6V-8638 Connectors (22) to the 299-2274 Hose As (15). Install the second connector to the 299-2273 Hose As (16). Connect the hoses to the circle drive motors.
