Maintenance Procedure for the Torque Limiting Coupling on the Road Reclaimer/Soil Stabilizer{5632}
- Road Reclaimer/Soil Stabilizer:
- RM-250C (S/N: AWG1-UP)
- RM-300 (S/N: BWR1-UP)
- RM-350B (S/N: AXW1-UP)
- RM350B (S/N: 7FS1-UP)
- RM-350 (S/N: 5FK1-UP)
- RM-500 (S/N: ASW1-UP)
- RR-250 (S/N: 6ED216-440)
- RR-250B (S/N: 3RR1-UP)
- SM-350 (S/N: 1RM1-UP)
- SS-250 (S/N: 6DD222-389)
- SS-250B (S/N: 5GR1-UP)
- RM-300 (S/N: BWR1-UP)
Introduction
This procedure provides the necessary steps in order to perform the following to the torque limiting coupling:
- Disassemble the torque limiting coupling.
- Inspect the torque limiting coupling.
- Clean the friction surfaces.
- Assemble the torque limiting coupling.
The procedure that follows affects the following part numbers and the following sales model.
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| Part Number | Group Number | Description | Sales Model |
|---|---|---|---|
| 104-1900 | 106-4306 | Torque Limiting Coupling | RR-250 (S/N: 6ED216-363) SS-250 (S/N: 6DD222-324) |
| 120-7632 | 106-4306 | Torque Limiting Coupling | RR-250 (S/N: 6ED364-440) SS-250 (S/N: 6DD325-389) |
| 120-7632 | 106-4306 | Torque Limiting Coupling | RR-250B (S/N: 3RR1) SS-250B (S/N: 5GR1-UP) |
| 120-7632 | 201-3420 | Torque Limiting Coupling | RM-250C (S/N: AWG1-UP) |
| 104-1899 | 6R-2486 | Torque Limiting Coupling | RM-350 (S/N: 5FK1-72) SM-350 (S/N: 1RM1-47) |
| 120-7631 | 6R-2486 | Torque Limiting Coupling | RM-350 (S/N: 5FK73-UP) SM-350 (S/N: 1RM48-UP) |
| 173-2723 | 6R-2486 | Torque Limiting Coupling | RM-350 SM-350 (1) |
| 138-8766 | 153-1356 | Torque Limiting Coupling | RM-350B (S/N: 7FS1-UP) (S/N: AXW1-UP) |
| 246-3239 | Torque Limiting Coupling | RM-300 (S/N: BWR1-UP) |
|
| 138-8766 | 153-1356 | Torque Limiting Coupling | RM-500 (S/N: ASW1-UP) |
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| ( 1 ) | Replacement part |
The torque is preset at the factory. The torque limiter does not require adjustment at the time of installation.
Note: The torque limiter can be allowed to wear until the wear indicator protrudes beyond the milled flat surface of the pressure plate. The wear indicator should be checked periodically.
Note: The RM-250C only has two friction plates versus three on the other machines.
Disassembly
- The following procedure assumes that the torque limiter has been removed from the machine.
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| Illustration 1 | g01199844 |
(A) Location of the spring cups in the torque limiter | |
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| Illustration 2 | g01199848 |
(A) The spring cup (A). | |
Note: Do not disassemble the spring cups (A) .
Note: If a spring cup is damaged, dispose of the spring cup in a safe manner.
Note: Do not apply heat to the output hub.
Note: Do not loosen or remove torque pins from the end plate.
- Place the torque limiter on a work bench. The input bearing should be facing upward.
- Remove fastener (1) and fastener (2). Remove shield (3) .
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| Illustration 3 | g01191667 |
- Remove locknuts (4) that hold spring cup (5) .
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| Illustration 4 | g01262967 |
- Remove pressure plate (6) .
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| Illustration 5 | g01263001 |
- Remove output assembly by lifting on the outer edge of separator plate (7). Place the output assembly on a work bench with bolts (8) facing upward.
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| Illustration 6 | g01263004 |
- Remove friction plate (9) .
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| Illustration 7 | g01263006 |
- Remove separator plate (7) .
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| Illustration 8 | g01263392 |
- Remove friction plate (10) .
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| Illustration 9 | g01263311 |
- Remove separator plate (11) .
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| Illustration 10 | g01263318 |
- Remove bolts (8), washers (12), and fixed friction plate (13) .
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| Illustration 11 | g01263401 |
- Remove bearing (14) .
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| Illustration 12 | g01263410 |
Inspection
- Check the flatness of the pressure plate and input hub with a straight edge and feeler gauge. If warpage exceeds 0.13 mm (0.005 inch), then replace the pressure plate.
- Check the spring cups. If any of the bolts are damaged or even suspected of being damaged, then replace bolts.
- Check the face of bearing (15) .
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| Illustration 13 | g01263414 |
Maintenance on the Friction Surfaces
- Use an emery cloth with 300 grit to remove any corrosion from the following parts:
- Input hub
- Pressure plate
- Separator plate
- Input hub
- Use an emery cloth with 300 to lightly sand the following parts:
- Friction material on the fixed friction plate
- The two friction plates
- Friction material on the fixed friction plate
- Use an emery cloth with 300 grit to lightly polish the ID of the bronze bearing and the OD of the mating surface of the input hub.
- Use 222-3117 Brake Cleaner to clean the friction surfaces of the input hub, pressure plate, separator plates, bearing, and input hub. Then dry with a clean rag. Do not leave any residue on the friction surfaces.
Note: DO NOT USE BRAKE CLEANER ON FRICTION MATERIAL.
Assembly
- Install bearing into the output hub. If the bearing is worn or damaged replace the bearing.
- Install a new fixed friction plate onto the output hub. Secure the new fixed friction plate to the output hub with bolts (8) and washers (12). Torque to 136 N·m (100 lb ft)
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| Illustration 14 | g01263474 |
- Place pressure plate (6) on a work bench with the friction surface upward.
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| Illustration 15 | g01263001 |
- Lower the output hub into the pressure plate. The friction plate must be facing upward.
- Place separator plate (11) onto the friction plate for the output hub.
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| Illustration 16 | g01263318 |
- Install friction plate (10) on top of the separator plate. The holes in the separator plate should be engaged in the dowel pins.
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| Illustration 17 | g01263311 |
- Place separator plate (7) on top of the friction plate.
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| Illustration 18 | g01263392 |
- Install friction plate (9) on top of the separator plate. The holes in the separator plate should be engaged in the dowel pins.
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| Illustration 19 | g01263006 |
- Lower the input hub onto the friction plate. Torque pins (16) should pass through the two smaller holes with separator plate (7) .
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| Illustration 20 | g01263486 |
- Turn over the torque limiter. The face of the drive shaft should be facing upward.
- Install spring cups onto input hub (17). Hex of the spring cups must be piloted in hex holes in the pressure plate. Refer to "" Location and Torque of Spring Cups" " for the correct location and proper torque of the spring cups.
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| Illustration 21 | g01263497 |
- Install locknuts (4) which hold spring cups (5) .
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| Illustration 22 | g01262967 |
- Secure the spring cups with locknuts. Do not exceed 68 N·m (50 lb ft) of torque.
- Replace shield (3). Use fasteners (1) and (2) .
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| Illustration 23 | g01191681 |
- Paint a line (18) on the torque limiting coupling in order to verify that the torque limiter slips when high impact load is encountered. The painted line (18) will separate indicating that a high impact load has been encountered. If the line does not separate, remove the torque limiter and perform the procedure above.
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| Illustration 24 | g01263501 |
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| Illustration 25 | g01263509 |
- The torque limiter can now be placed back into the power train. Recheck all mechanical connections.
Location and Torque of Spring Cups
Note: Refer to Table 1 in order to identify the applicable part number for the torque limiting coupling. Use the appropriate illustration and the appropriate table to determine the proper location and torque for the spring cups.
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| 104-1899 Torque Limiting Coupling Torque for Spring Cups | |||
|---|---|---|---|
| Item | Color | Torque Per Spring Cup | Qty |
| 1 | Red | 472 N·m (348 lb ft) |
2 |
| 2 | Blue | 282 N·m (208 lb ft) |
20 |
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| Illustration 26 | g01266516 |
104-1899 Torque Limiting Coupling (1) Red Spring Cups (2) Blue Spring Cups | |
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| 104-1900 Torque Limiting Coupling Torque for Spring Cups | |||
|---|---|---|---|
| Item | Color | Torque Per Spring Cup | Qty |
| 1 | Blue | 282 N·m (208 lb ft) |
22 |
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| Illustration 27 | g01266623 |
104-1900 Torque Limiting Coupling (1) Blue Spring Cups | |
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| 138-8766 Torque Limiting Coupling Torque for Spring Cups | |||
|---|---|---|---|
| Item | Color | Torque Per Spring Cup | Qty |
| 1 | Red | 708 N·m (522 lb ft) |
6 |
| 2 | Blue | 423 N·m (312 lb ft) |
4 |
| 3 | White | 297 N·m (219 lb ft) |
2 |
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| Illustration 28 | g01266659 |
138-8766 Torque Limiting Coupling (1) Red Spring Cup (2) Blue Spring Cup (3) White Spring Cup | |
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| 246-3239 Torque Limiting Coupling Torque for Spring Cups | |||
|---|---|---|---|
| Item | Color | Torque Per Spring Cup | Qty |
| 1 | Gold | 683 N·m (504 lb ft) |
2 |
| 2 | Red | 472 N·m (348 lb ft) |
10 |
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| Illustration 29 | g01266777 |
246-3239 Torque Limiting Coupling (1) Gold Spring Cup (2) Red Spring Cup | |
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| 120-7631 Torque Limiting Coupling Torque for Spring Cups | |||
|---|---|---|---|
| Item | Color | Torque Per Spring Cup | Qty |
| 1 | Gold | 685 N·m (505 lb ft) |
4 |
| 2 | Red | 473 N·m (349 lb ft) |
8 |
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| Illustration 30 | g01266785 |
120-7631 Torque Limiting Coupling (1) Gold Spring Cup (2) Red Spring Cup | |
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| 120-7632 Torque Limiting Coupling Torque for Spring Cups | |||
|---|---|---|---|
| Item | Color | Torque Per Spring Cup | Qty |
| 1 | Gold | 685 N·m (505 lb ft) |
2 |
| 2 | Red | 473 N·m (349 lb ft) |
10 |
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| Illustration 31 | g03067939 |
120-7632 Torque Limiting Coupling (1) Gold Spring Cup (2) Red Spring Cup | |
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| 173-2723 Torque Limiting Coupling Torque for Spring Cups | |||
|---|---|---|---|
| Item | Color | Torque Per Spring Cup | Qty |
| 1 | Red | 708 N·m (522 lb ft) |
2 |
| 2 | Blue | 423 N·m (312 lb ft) |
10 |
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| Illustration 32 | g01266819 |
173-2723 Torque Limiting Coupling (1) Red Spring Cup (2) Blue Spring Cup | |
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