User Manual Q&AAnswer
Mar 06, 2025 - 07:47 PM
To prepare the clutch for installation, there are a few steps you need to follow:
1. Check the compatibility of the transmission input shaft and driven disc. The spline dimensions must match each other.
2. Inspect all mating components of the clutch and the entire clutch actuation system. Replace any worn components as needed, as wear can cause incomplete clutch disengagement.
3. Ensure that the input shaft is not twisted and that the driven disc can slide freely on the input shaft spline. Excessive wear on the input shaft could lead to a poor release condition or damage to the hub of the driven disc.
4. Make sure the release bearing fits the release yoke and input shaft quill, or ensure that the clutch actuator fits the clutch for push-type clutches.
5. Clean the surfaces carefully before applying grease. Apply a light layer of grease inside the clutch disc hub spline and on the splines of the transmission input shaft. Wipe off any excess grease from the transmission input shaft and the driven disc hub spline.
Important: If you are operating in dusty environments or using construction vehicles, it is recommended not to apply grease on the hub or the input shaft splines. Also, do not apply grease on nickel-coated splines. Use the Eaton Clutch Reference Catalogue on the Eaton website to ensure you have the proper replacement clutch for your vehicle.
When it comes to preparing the transmission for installation, follow these steps:
1. Before installation, verify that the cover assembly fits the engine flywheel. Check that the driven disc damper section fits the flywheel bore and that there is no interference with the flywheel bolts. Inspect the pilot bearing for replacement.
2. Check for flywheel flatness. The flywheel must be new or resurfaced before clutch installation. The maximum runout for the flywheel face is 0.20 mm (0.008 in), and the maximum runout for the flywheel to flywheel housing is also 0.20 mm (0.008 in).
3. Insert 2 or 3 guide studs into the flywheel at the specified positions. Insert the aligning tool through the driven disc and into the pilot bearing. Then install the cover assembly on the guide studs and use a brass or plastic hammer to lightly tap the cover assembly to fully fit the flywheel.
4. Install the bolts according to the truck manufacturer's recommendations. The number and size of bolts depend on the clutch size:
- 362 mm: 9 bolts M8x1.25
- 365 mm: 9 bolts M8x1.25
- 380 mm and 395 mm: 8 bolts M10x1.5
- 400 mm and 430 mm: 12 bolts M10x1.5
Remove the studs and install the remaining bolts. It is important to use only new bolts with the proper length to assemble the clutch. Refer to the OEM service manuals for specific service recommendations.
5. Tighten the bolts in a criss-cross pattern according to the specified torque in the OEM manual. Recommended mounting bolt grade is 10.9.
Optional: If your clutch has shipping clips, be aware that 4 shipping clips (yellow) will come loose while tightening the bolts. Remove the aligning tool and the 4 shipping clips.
Important: For twin plate clutches, do not disassemble or modify the cover assembly. Do not loosen the bolts that fasten the intermediate plate. Do not change the factory settings.
Important (optional for push-type self-adjust clutches): After tightening the clutch mounting bolts, ensure that the control fingers (4 locations on the cover assembly) for the self-adjust system are mated to a flywheel surface. Use a 0.2 kg (6 ounce) hammer and a 9.5 mm (3/8 in) flat nose brass punch to lightly tap the four control fingers to the flywheel. Be careful not to damage the copper-coated control fingers, as it can decrease the clutch wear life.
Once the clutch is prepared and installed on the flywheel, you can proceed with the installation of the transmission onto the engine flywheel housing. Align the input shaft spline with the driven disc hub spline and ensure that the release bearing assembly's middle tab points up. Follow the OEM service manuals for specific installation recommendations.
Note: After the Eaton clutch and transmission are installed, it is necessary to perform a clutch engagement point calibration using the OEM or an approved diagnostic software.
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