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Service Bulletin - Process

SUPPORT

Powering Business Worldwide

Subject: Updated Heavy-Duty Solo Clutch In-Vehicle Resetting Procedure
Document Number: CLIB0026
Updated:

Date: February 11 , 2013

Issue Description:
The Eaton Heavy-Duty Solo Clutch Technical Support Team worked with truck
dealership technicians to identify confusion with the current published process of the
product's In-Vehicle Resetting Procedure.

The In-Vehicle Resetting Procedure for Heavy-Duty Solo Clutch published in the Eaton
Heavy-Duty Clutch Service Manual, CLSM0200 (May 2012), has been reviewed .
Changes to CLSM0200 are scheduled for Q2 of 2013 and wil l include the procedure
outlined in this bulletin. Technicians are encouraged to use this procedure if they need
to reset an Eaton Heavy-Duty Solo Clutch .
Revised Process:
The following process should improve the resetting experience if there is a need to reset
an Eaton Heavy-Duty Solo Clutch. If additional assistance is required with resetting ,
please contact the Roadranger Support Line at 1-800-826-HELP (4357) or your local
Eaton Roadranger Service Representative.

Page 1 of4

· Service Bulletin - Process

Solo Advantage
Self-Adjusting Clutches

In-Vehicle Resetting Procedure

0

Determine if the release bearing travel is
correct. Measure the distance between the
clutch brake and the release bearing with
the clutch pedal up. II the measurement is
between 0.490 and 0.590'. the Solo has
set ttself correctly.

II

a

If the release bearing travel is less than 0.490
the Solo must be reset. A common cause of this
is the trans mission was pulled in with the release
arm during clutch installation.

€) Rotate the engine so that the cam tab can
be reached through the transmission
inspection opening.

0

Clutch
Brake
Push the clutch pedal to the floor. While the
clutch pedal is pushed to the floor have someone
push the cam tab to the new position using finger
pressure. Once the cam tab is pushed to the new
position you can release the clutch pedal.

-

Nole: If using a tool to assist with movement of
l he cam lo the new position, use a blunt tool that
will not damage lhe cam.
Note: If the cam tab does not move, there is not
enough release bearing travel to allow the cams
to separate. In this case, loosen the transmission
and install 1/2 spacers between the flywheel
housing and bell housing.
With the spacers in place push the clutch pedal to
the floor \'lhile someone pushes the cam tab to
the new position. Once the tab is in the raised
area at the new position, release the clutch pedal
and remove the spacers. Torque the transmission
mounting bolts.

Page 2 of 4

-

Measure the release
bearing travel

Service Bulletin - Process

Solo Advantage
Self-Adjusting Clutches

0

Install (4) shipping bolts and progressively tighten
until they bottom out.

&. Caution: Only use hand tools to tighten
shipping bolts. Oo not use air tools.
Rotate the engine to access all 4 bolts:
• 15 112 Solo use 7/ t6 x 14 UNC x 1 3/4
• Stamped 14 Solo use 3/8 x 16 UNC x 1 1/4
Note: This will reset the pressure plate separator
sleeves and allow the clutch to release after installation.

0

Remove the (4) shipping bolts. The release bearing and
sleeve will move forward towards the engine when the
bolts are removed. The Solo is now in the new position.
Note: If the procedure was performed correctly, the gap
between the release bearing and clutch brake should be
about 0.750 inches.

f) With the free pedal removed push the clutch pedal down
at least 5 limes. Make sure the clutch release bearing
contacts the clutch brake.
Nole: For mechanical linkage, while engaging and
releasing the clutch, the cab free pedal will Increase.
This indicates the Solo is adjusting to the environment.
Note: For hydraulic linkage, be sure to stroke the clutch
pedal all the way to the floor, ensuring that the release
bearing Is being stroked far enough for the clutch to
make an adjustment. With a hydraulic release system
there will be no change in free pedal when the Solo
clutch makes an adjustment.

0

0

Measure the distance between the clutch brake and the
release bearing. It should be between 0.490 and 0.590 .

If the release bearing travel is still greater than 0.590
between the clutch brake and the release bearing,
repeat Steps 7 and 8.

(!!) For mechanical linkages, adjust the clutch linkage to
achieve 1/a clearance between the release yoke and
the release bearing. Verify proper clutch brake
squeeze.

Page 3 of 4

Shipping Bolts

Service Bulletin - Process

Solo Advantage
Self-Adjusting Clutches

Verify Clutch Brake Squeeze

I

A WARNING

I

Use a gauge long enough to keep
hands away from moving pans.

0

Have an assistant lnser1 0.010 (0.25 mm)
feeler gauge between the release
bearing and the clutch brake.
Press the pedal down to the floor to
clamp the gauge:
• If the gauge does not clamp, readjust
the truck linkage and move the yoke
finger closer to the bearing.

0

@

Slowly let up on the pedal and
measure the pedal position at the
moment the gauge can be removed:
• If pedal Is more than 1 (25.4 mm)
from the floor, readjust the truck
linkage to move theyoke fingers
further from the release bearing.
Repeat Step 1.

The material contained in this bulletin is product improvement information. Eaton Corporation is not committed to,
or liable for, ca nvassing existing products.
FSU D: 2012-FSUD-1 964

Page 4 of 4