Checking Clutch Operation - MacDon R116 Unloading And Assembly Instructions

7.17 Checking Clutch Operation

The driveline clutch requires an initial break-in procedure; otherwise, the clutch may slip prematurely. As part of the
predelivery inspection (PDI) procedure, the clutch spring pressure should be released and the header engaged.
This intentional slippage of the clutch will wear in and seat the friction linings against the metal drive plates and
remove any oxidization. Perform the following run-in procedure during PDI, whenever the clutch friction linings
have been replaced, or if the unit has not been operated for 6 months or more.
1. Release two lever clamps (A) on the shield cone
installed at the header swivel gearbox.
2. Slide shield away from gearbox.
3. Mark a horizontal line (A) across friction discs and drive
plates with a paint marker.
4. Back off all pressure plate tensioning nuts (B) one and a
half revolutions.
5. Reattach the shield cone onto the header swivel
gearbox.
6. Start tractor and adjust engine speed to 1000 rpm.
7. Engage the tractor's power take-off (PTO) for
3–5 seconds. Repeat three times.
NOTE:
The clutch will slip with a force of 1350 Nm (995 lbf·ft) at
1000 rpm.
8. Shut down the engine and remove the key.
9. Inspect the clutch. The horizontal mark (A) across the
friction discs should no longer line up with the metal
drive plates. This indicates the clutch was slipping.
NOTE:
It is not necessary for the indicating mark on the friction
discs to be misaligned from the metal drive plates on
both sides of the disc. The friction discs are not splined
to any component and will likely only slip on one
surface.
10. Remove the shield cone from the header swivel
gearbox.
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PERFORMING PREDELIVERY CHECKS
147
Figure 7.31: Driveline Shield Cone
B
Figure 7.32: Driveline and Gearbox
B
Figure 7.33: Driveline and Gearbox
A
A
A
Revision A