CLUTCHBRAKEADJUSTMENT STEP 1 - Mid-America Clutch

STEP 1CLUTCH BRAKE ADJUSTMENT

FOR BOTH MANUAL &SELF ADJUSTING CLUTCHES

STEP 2FREE PEDAL ADJUSTMENT

(Internal Clutch Adjustment)FOR MANUALLY ADJUSTEDCLUTCHES ONLY

IMPORTANT

Do not adjust externallinkage to get free pedal.

CLUTCH ADJUSTMENT WITHOUT CLUTCH BRAKEFOR BOTH MANUAL &

SELF ADJUSTING CLUTCHES

STEP 4REINSTALL LOCK STRAP

FOR MANUALLY ADJUSTEDCLUTCHES ONLY

STEP 3VISUAL INSPECTIONFOR BOTH MANUAL ANDSELF ADJUSTING CLUTCHES

FREE PEDAL ADJUSTMENTFOR SELF ADJUSTING CLUTCHES ONLY

REPOSITION SELF ADJUSTER ASSEMBLYFOR SELF ADJUSTING CLUTCHES ONLY

NOTE: The clutch will not self-adjust if theactuator arm is not inserted into therelease sleeve retainer, or releasebearing travel is less than 1/2”

Warning: When converting from Solo to Adjustable Clutch, check Release Yoke.If it is a Roller Yoke then it has to be changed out.Standard position use 105C137Hydraulic on bottom use A7414 and Grease Hose A7418.

STOP!BEFORE YOU INSTALL THIS CLUTCH, YOU MUST MEASURE THE FLYWHEEL OPENING

TO DETERMINE IF YOU HAVE THE CORRECT CLUTCH FOR THIS APPLICATION.

MU-127597-DSCB • MU-155597-DSCB

R151105 • 3600# PLATE LOAD GOOD UP TO 1400 FT. LBS.

7.25” OPENING

(Rockwell Type)

MU-129698-SB10 • 3600# PLATE LOAD GOOD UP TO 1650 FT. LBS.


MU-155698-12-SB10 • 4000# PLATE LOAD GOOD UP TO 2050 FT. LBS.


8.562” OPENING

(Rockwell Type)




9.75” OPENING - MACK ONLY:




MU-155698-VHD • 4000# PLATE LOAD GOOD UP TO 2250 FT. LBS.


9.75” OPENING - ALL OTHER APPLICATIONS:

MISAPPLICATION WILL VOID WARRANTY!

(Rockwell Type)

1700 FT. LBS.

1860 FT. LBS.

MISAPPLICATION WILL VOID WARRANTY!

* FOR HYDRAULIC LINKAGE USE PREFIX SO (SELF ADJUSTING)

* FOR MECHANICAL LINKAGE USE MANUALADJUST CLUTCH

PROPER FLYWHEEL MACHINING DIMENSIONSFOR SPICER® TYPE 14” & 151/2” - 2 PL. FLYWHEELS

DOES YOUR CLUTCH BRAKE NEED A SPACER?

NOTE: all seat rings must be machined to .180”-.200” tall.

How to Measure the split in the Bell dimension (2.500”): 15 1/2”-2 Pl.

1. Check condition of flywheel. If it is cracked or warped re-sur-face or replace. (IF REPLACING CERAMIC BUTTON DISCWITH "ORGANIC" TYPE CLUTCH FACING, FLYWHEEL SUR-FACE MUST BE SMOOTH OR PREMATURE CLUTCH FAIL-URE CAN OCCUR).

REMEMBER: MACHINING FLYWHEEL PAST THE .060" REC-OMMENDED, MOVES THE PRESSURE PLATE AWAY FROMTHE TRANSMISSION AND THE RELEASE YOKE IN BELLHOUSING MAY NOT ALIGN PROPERLY WITH THE PRES-SURE PLATE RELEASE BEARING HOUSING.

2. Inspect and dial-indicate mating surface of engine flywheelhousing and clutch bell-housing for alignment, and also checkflywheel runout. (See FIG. 1)

CAUTION: IF MISALIGNMENT IS GREATER THAN LIMITSRECOMMENDED, THIS WILL CAUSE POOR CLUTCHRELEASE, RAPID WEAR ON TRANSMISSION PILOT SHAFT,AND DESTRUCTION OF CLUTCH DISC. EXCESSIVE FLY-WHEEL RUNOUT MAY CAUSE SEVERE VIBRATION INVEHICLE DRIVELINE.

3. A new pilot bearing should be used. If the old bearing isreused, clean and check the bearing thoroughly, and repackwith a high temperature grease. Before installing pilot bearinginto flywheel, check for freedom of move¬ment on transmissionpilot shaft.

4. Insert two guide studs, 5" long, into the two upper mountingholes in the flywheel. Clean all metal surfaces before installa-tion (center plate, flywheel, & pressure plate.)

5. Insert alignment shaft through the release bearing assem-bly, on the Cover Assembly. (NOTE: IF AN OLD PILOT SHAFTWITH WORN SPLINES IS USED TO ALIGN CLUTCH DISC,TRANSMISSION PILOT SHAFT MAY DAMAGE CLUTCHDISC HUBS DURING INSTALLATION OF TRANSMISSION.)

6. Install rear Clutch Disc, Center Plate, with paint marksmatching on Cover and front Disc as marked, onto alignmenttool in the Cover Assembly.

7. Position Clutch Assembly onto the two guide studs in the fly-wheel and slide forward until Cover Assembly starts into the fly-wheel pilot making sure alignment shaft enters pilot bearing.

8. Remove the two guide studs previously installed in flywheeland start mounting bolts with lock washers.

9. Progressively tighten cap screws which hold CoverAssembly to the flywheel, using 'X' pattern sequence. Torque to45 to 50 ft. Ibs. (CAUTION: FAILURE TO TIGHTEN COVERCAP SCREWS IN SEQUENCE MAY CAUSE PERMANENTDAMAGE AND/OR AN OUT OF BALANCE CONDITION).Remove alignment shaft.

10. Examine transmission pilot shaft for wear and replace ifnecessary. (WORN SPLINES ON PILOT SHAFT WILL CAUSECLUTCH TO RELEASE IMPROPERLY AND MAY CAUSESPLINED HUBS IN CLUTCH DISC TO BREAK OUT.)

11. Inspect release bearing yoke and both cross shaft bush-ings in bell housing and replace if worn. (NOTE: FOR PROP-ER CLUTCH RELEASE, RELEASE BEARING HOUSING ONCOVER MUST "SQUEEZE" CLUTCH BRAKES DURINGCLUTCH DISENGAGEMENT. WORN PARTS IN BELL HOUS-ING MAY PREVENT FULL MOVEMENT OF RELEASE BEAR-ING DURING OPERATION OF VEHICLE.)

12. If Clutch Brake is to be used, place on transmission pilotshaft.

13. Rotate Release Bearing Housing on Cover Assembly untilflat section is on top. (NOTE: BELL HOUSING CROSS SHAFTON SOME VEHICLE MAY BE BELOW CENTER. THISREQUIRES FLAT SECTION ON RELEASE BEARING TO BEIN DOWN POSITION.)

14. Using extreme caution, guide transmission through Coverand Disc Assembly, rotating bell housing shaft so that releaseyoke fingers clear the pads on the Release Bearing Assembly.(WARNING: TRANSMISSION MUST NOT HANG OR BEFORCED INTO CLUTCH. THIS CAN WARP CLUTCH DISCAND PREVENT CLUTCH FROM RELEASING.)

15. Start bell housing cap screws and tighten progressively tothe torque recommended by the vehicle manufacturer.

16. Fill Release Bearing on Clutch Cover Assembly with a hightemperature grease. (NOTE: RELEASE BEARING HOUSINGHAS NOT BEEN PRE-PACKED WITH GREASE FROM FAC-TORY.)

17. Install clutch linkage and see "ADJUSTING PROCEDURE".

INSTALLATION INSTRUCTIONS FOR “SPICER®” TYPE 151/2” TWO-PLATE CLUTCHES

MAINTENANCE TIPS

1. Lubricate clutch release bearing at each chassis lubrication period, using only a high temperature grease.OVERGREASE - the excess will find its way to the release bearing sleeve bushings. It is OK and recommended to getgrease on the clutch brake.

2. Adjust clutch before the pedal clearance has disappeared. Failure to do this will result in slippage, and an adjustmentmay not help.

3. If the clutch is hydraulically assisted, make sure slave and master cylinder are functioning properly.

Lit. 64360 © 2012

YOUR MASTERS OF CLUTCH TECHNOLOGYLight • Medium • Heavy Duty • Agricultural • Industrial

5600 Upper Mt. Vernon Rd., Evansville IN 47712

(812)425-0869 • (800)457-3353 • Fax (800)526-2226

www.Mid-AmericaClutch.com

1. Check condition of flywheel. If it is cracked or warped resur-face or replace. (IF REPLACING CERAMIC BUTTON DISCWITH "ORGANIC" TYPE CLUTCH FACING, FLYWHEEL SUR-FACE MUST BE SMOOTH OR PREMATURE CLUTCH FAIL-URE CAN OCCUR).

FLYWHEEL DEPTH MUST BE 2.937" REMEMBER: MACHINING FLYWHEEL PAST THE .060" REC-OMMENDED, MOVES THE PRESSURE PLATE AWAY FROMTHE TRANSMISSION AND THE RELEASE YOKE IN BELLHOUSING MAY NOT ALIGN PROPERLY WITH THE PRES-SURE PLATE RELEASE BEARING HOUSING.


CAUTION: IF MISALIGNMENT IS GREATER THAN LIMITSRECOMMENDED, THIS WILL CAUSE POOR CLUTCHRELEASE, RAPID WEAR ON TRANSMISSION PILOT SHAFT,AND DESTRUCTION OF CLUTCH DISC. EXCESSIVE FLY-WHEEL RUNOUT MAY CAUSE SEVERE VIBRATION IN VEHI-CLE DRIVELINE.

3. A new pilot bearing should be used. If the old bearing isreused, clean and check the bearing thoroughly, and repack witha high temperature grease. Before installing pilot bearing into fly-wheel, check for freedom of movement on transmission pilot shaft.

4. Drive Pins in flywheel should be replaced. Check and be sureDrive Pin heads are square with the flywheel friction surface. It isrecommended that our tool T-0670 be used. (IF DRIVE PINSARE NOT REPLACED, ASSUME THAT THEY HAVE TURNED.THE CONSTANT POUNDING OF THE CENTER PLATE MAYHAVE CHANGED THE POSITION OF THE DRIVE PINS IN THEFLYWHEEL. PLAY SAFE - CHECK THEM ALL!) (See FIG 2)

5. After the Drive Pins are installed and properly aligned, posi-tion the Center Plate onto the Drive Pins and check the clear-ance with a feeler guage. Clearance should be .006" to .010" andmeasured from the same side of Drive Pin at each location. (SeeFIG 3)

6. Install front Clutch Disc, Center Plate, and rear Disc as marked.

7. Insert alignment shaft through both Clutch Disc making sureit enters the pilot bearing. (NOTE: IF AN OLD PILOT SHAFTWITH WORN SPLINES IS USED TO ALIGN CLUTCH DISC,TRANSMISSION PILOT SHAFT MAY DAMAGE CLUTCH DISCHUBS DURING INSTALLATION OF TRANSMISSION.)

8. Position Cover Assembly onto the pilot shaft and guidetoward flywheel mounting surface making sure Cover fits intoflywheel pilot. Start cap screws.

9. Progressively tighten cap screws which hold coverAssembly to the flywheel, using 'X' pattern sequence. Torque to35 to 40 ft. Ibs. (CAUTION: FAILURE TO TIGHTEN COVERCAP SCREWS IN SEQUENCE MAY CAUSE PERMANENTDAMAGE AND/OR AN OUT OF BALANCE CONDITION).Remove alignment shaft.



12. If Clutch Brake is to be used, place on transmission pilot shaft.

13. Rotate Release Bearing Housing on Cover Assembly untilflat section is on top. (NOTE: BELL HOUSING CROSS SHAFTON SOME VEHICLE MAY BE BELOW CENTER. THISREQUIRES FLAT SECTION ON RELEASE BEARING TO BEIN DOWN POSITION.)




17. Install clutch linkage and see "ADJUSTING PROCEDURE".

INSTALLATION INSTRUCTIONS FOR “SPICER®” TYPE 14” TWO-PLATE CLUTCHES

1. LUBRICATE CLUTCH RELEASE BEARING AT EACH CHASSIS LUBRICATION PERIOD, USING ONLY A HIGH TEMPERATUREGREASE. OVERGREASE - the excess will find its way to the release bearing sleeve bushings. It is OK and recom-mended to get grease on the clutch brake.

2. ADJUST CLUTCH BEFORE THE PEDAL CLEARANCE HAS DISAPPEARED. FAILURE TO DO THIS WILL RESULT IN SLIP-PAGE, AND AN ADJUSTMENT MAY NOT HELP.

3. IF THE CLUTCH IS HYDRAULICALLY ASSISTED, MAKE SURE SLAVE AND MASTER CYLINDER ARE FUNCTIONING PROPERLY.

MAINTENANCE TIPS

L

PROPER FLYWHEEL MACHINING DIMENSIONSFOR SPICER® TYPE 14” & 151/2” - 2 PL. FLYWHEELS


NOTE: on 15.5” flywheels, the seat ring must be kept to .180” - .200” tall.


Lit. #64243 © Mid-America Clutch Co., Inc.

6

1. Check condition of flywheel. If it is cracked or warped, re-surface or replace. (IF REPLACING CERAMIC BUTTON DISCWITH "ORGANIC" TYPE CLUTCH FACING, FLYWHEEL SUR-FACE MUST BE SMOOTH OR PREMATURE CLUTCH FAIL-URE CAN OCCUR).

REMEMBER: MACHINING FLYWHEEL PAST THE .060" REC-OMMENDED, MOVES THE PRESSURE PLATE AWAY FROMTHE TRANSMISSION AND THE RELEASE YOKE IN BELLHOUSING MAY NOT ALIGN PROPERLY WITH THE PRES-SURE PLATE RELEASE BEARING HOUSING.


CAUTION: IF MISALIGNMENT IS GREATER THAN LIMITSRECOMMENDED, THIS WILL CAUSE POOR CLUTCHRELEASE, RAPID WEAR ON TRANSMISSION PILOT SHAFT,AND DESTRUCTION OF CLUTCH DISC. EXCESSIVE FLY-WHEEL RUNOUT MAY CAUSE SEVERE VIBRATION INVEHICLE DRIVELINE.

3. A new pilot bearing should be used. If the old bearing isreused, clean and check the bearing thoroughly, and repackwith a high temperature grease. Before installing pilot bearinginto flywheel, check for freedom of movement on transmissionpilot shaft.

4. Insert two guide studs, 5" long, into the two upper mountingholes in the flywheel. Clean all metal surfaces before installa-tion (center plate, flywheel, & pressure plate.)

5. Insert alignment shaft through the release bearing assem-bly, on the Cover Assembly. (NOTE: IF AN OLD PILOT SHAFTWITH WORN SPLINES IS USED TO ALIGN CLUTCH DISC,TRANSMISSION PILOT SHAFT MAY DAMAGE CLUTCHDISC HUBS DURING INSTALLATION OF TRANSMISSION.)

6. Install rear Clutch Disc, Center Plate, with paint marksmatching on Cover and front Disc as marked, onto alignmenttool in the Cover Assembly.

7. Position Clutch Assembly onto the two guide studs in the fly-wheel and slide forward until Cover Assembly starts into the fly-wheel pilot making sure alignment shaft enters pilot bearing.

8. Remove the two guide studs previously installed in flywheeland start mounting bolts with lock washers.

9. Progressively tighten cap screws which hold CoverAssembly to the flywheel, using 'X' pattern sequence. Torque to45 to 50 ft. Ibs. (CAUTION: FAILURE TO TIGHTEN COVERCAP SCREWS IN SEQUENCE MAY CAUSE PERMANENTDAMAGE AND/OR AN OUT OF BALANCE CONDITION).Remove alignment shaft.

10. Remove 4 set bolts in an “X” pattern after clutch isbolted to flywheel. Keep these bolts. If the clutch has to beremoved, for any reason, before the wear indicator is in the“WORN” position, these bolts (7/16”x14x13/4”) must bereinstalled (hand tight) before the clutch is removed fromflywheel.



13. If Clutch Brake is to be used, place on transmission pilotshaft.

14. Rotate Release Bearing Housing on Cover Assembly untilflat section is on top. (NOTE: BELL HOUSING CROSS SHAFTON SOME VEHICLES MAY BE BELOW CENTER. THISREQUIRES FLAT SECTION ON RELEASE BEARING TO BEIN DOWN POSITION.)




18. Install clutch linkage.

INSTALLATION INSTRUCTIONS FOR AUTOMATIC ADJUSTER 151/2” TWO-PLATE CLUTCHES

MAINTENANCE TIPS1. Lubricate clutch release bearing at each chassis lubrication period, using only a high temperature grease. OVERGREASE - theexcess will find its way to the release bearing sleeve bushings. It is OK and recommended to get grease on the clutch brake.

2. If the clutch is hydraulically assisted, make sure slave and master cylinder are functioning properly.

STOP!

MISAPPLICATION WILL VOID WARRANTY!Lit #64515

SO-155698-SB7 • 4000# Plate Load Good Up To 1700 FT. LBS.SO-155698-VHD • 4000# Plate Load Good Up To 2050 FT. LBS.

PROPER FLYWHEEL MACHINING DIMENSIONS1/2” - 2 PL. FLYWHEELS


NOTE: all seat rings must be machined to .180”-.200” tall.


FOR SELF-ADJUSTING TYPE 15

On older trucks with two-plate, pull-type clutch assemblies that use a clutch brake to stop the transmission, the customermay complain he can’t get the clutch brake to squeeze.


If needed, add the following:

Fiber Spacer: 125C-41 (.125 over) to be used with standard clutch brake.

Brake: HB-200 – Standard clutch brake (.375) HB-200-500 ( .125 over)HB-200-440 ( .060 over) HB-200-560 ( .185 over)

Adjustment procedure:

2. Fully depress the clutch pedal 4 to 5 times to activate the clutch adjuster.

3. Ensure that you have 1/16” clearance between the release fork and throw out bearing. And 1/2” to 9/16”clearance between release bearing and clutch brake. Note: Manually adjusted clutches require 1/8” free travelbetween release fork and throw out bearing. Automatic adjust clutches do not.

4. Verify that you have around 1” free pedal in the cab. If any adjustment is needed, adjust the upper pedal stop only.

5. Lubricate release bearing.

CLUTCHBRAKEADJUSTMENT STEP 1 - Mid-America Clutch

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