IS A CLUTCH BRAKE SPACER
REQUIRED?
Our Meritor Clutches are pre-adjusted at the factory. Therefore, no adjustment should be required at the time of
installation. However, if the flywheel has been reground and/or the transmission flange is worn, a fiber spacer may be
needed in conjunction with the new clutch brake being installed with the clutch.
On vehicles with this type of wear, the common complaint at time of installation is not being able to get the clutch
brake to squeeze. The solution could be to use the 1/8" fiber brake washer. Or, the flywheel may need to be replaced.
Before deciding that, however, our recommendation is to install the spacer to see if it solves the issue. One is included
with this clutch for that purpose. If the spacer is not needed, discard or save for future installations.
To use the spacer, slide the fiber washer onto the input shaft next to the transmission before the clutch brake itself is
put on. Then install the clutch and set the linkage per the usual procedure. (see schematic 1)
If the clutch and the transmission are already installed without the spacer and there are release problems, it may be
possible to install the spacer without removing the clutch and clutch brake. Cut a "V" shape on the fiber so it can be
twisted and slipped onto the input shaft from the side. Be sure to cut the bottom of the "V" smaller than the O.D. of the
input shaft so it won't fall off during operation. (see schematic 2)
The fiber should now be able to be twisted and fit over the input shaft between the clutch brake and the transmission
flange. The clearance between the bearing lid and clutch brake can now be reset at 1/2" to 9/16" with the internal
clutch adjuster.
Schematic 1
Schematic 2
1-3/4" Fiber Part No. MAF-A153BPB6
2" Fiber Part No. MAF-A148BPB6
Recommended
Openings
For 2" Shafts
O.D.
O.D. 2.0"
I.D. 1½"
For 1-3/4" Shafts
O.D. 1.75"
I.D.
I.D. 1.25"
Spacer
2