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NACD Power Take-Off Service Manual

1019024AM

14” HD, 14” HD(DP) and 14” HD(TP) Clutches

Includes Installation, Operation, Maintenance and Overhaul Instructions

Summary of Contents for 1019024AM

Page 1: ...NACD Power Take Off Service Manual 1019024AM 14 HD 14 HD DP and 14 HD TP Clutches Includes Installation Operation Maintenance and Overhaul Instructions ...

Page 2: ......

Page 3: ...North American Clutch Driveline Rockford Illinois Phone 800 383 9204 815 282 7960 Fax 815 282 9160 www naclutch com ...

Page 4: ...d be employed as necessary to assure that safe operations and a safe environment exist under prevailing conditions Use proper guards and other suitable safety equipment devices and procedures that may be desirable or specified in safety codes or as necessary to prevent accidental injury to person s or property These devices are neither provided by NACD nor are they the responsibility of NACD OWNER...

Page 5: ...cification 3 1 2 Grease Specification For Special Conditions 3 2 Lubrication Intervals 3 3 Bearing Operating Temperature 3 4 Methods of measuring clutch engagement force 3 4 1 Torque Wrench Method Preferred Method 3 4 2 Standard handle length 3 4 3 Altered handle length 3 5 Clutch Adjustment Procedure 4 0 INSTALLATION INFORMATION 4 1 Preparation 4 2 Flywheel And Flywheel Housing Alignment Checks 4...

Page 6: ...ub assembly 9 3 Disassemble the sleeve and bearing sub assembly 9 4 Remove the adjusting ring sub assembly 9 5 Complete the disassembly of the clutch 10 0 INSPECT THE CLUTCH COMPONENTS 11 0 ASSEMBLE THE CLUTCH 11 1 Assemble the sleeve and bearing sub assembly 11 2 Assemble the clutch body sub assembly 11 3 Install the release levers 11 4 Install the release sleeve and bearing assembly 12 0 ASSEMBL...

Page 7: ...lpha number unique to that particular assembly Sub assemblies or kits are designated 3XXXXXAM and individual components are designated 2XXXXXAM where XXXXX is a 5 digit alpha number unique to that particular sub assembly kit or component Previous numbers may have been displayed as 4 XXXXX 40XXXXX 04 XXXXX or 4 OXXXXX The unique 5 digit number remains unchanged regardless of how the prefix may have...

Page 8: ...00 8 8 8 8 1 2 1 2 1 2 1 2 3 1496 80mm 3 1496 80mm 3 1496 80mm 3 9370 100mm A 25 500 20 125 B 28 00 21 75 C 26 750 20 875 D 3 94 3 94 Qty 16 12 Hole Dia 547 184 Bolt Size 1 2 7 16 Pilot Diameter Drive Ring Pilot F Bolt Circle G Housing Face to Flywheel H Pilot Bearing Bore J Bolt Hole K Qty Size O D Bolt Circle See Side Note Flywheel Housing Bolts and Bolt Holes E All dimensions are in inches unle...

Page 9: ... belts are under tightened belt whip and other resultant factors can cause intermittent side load pulls which exceed allowable limits Note Side load charts are not furnished for some Power Take Offs because the PTO is not designed for side load applications or the pilot bearing is provided by the customer Pilot bearing size and type are integral to allowable side load pull calculations Therefore a...

Page 10: ...heck the alignment of the engine flywheel and the engine flywheel housing Excessive bore and face runout of the flywheel flywheel housing and flywheel housing adapters if used can adversely affect the performance of the PTO and the system of which it is part A dial indicator will be required to measure alignment Required Clutch Torque Capacity Calculation Required Clutch Torque Maximum Engine Torq...

Page 11: ...unout Deviation Check Mount the indicator base on the face of the flywheel and position the dial indicator tip so its movement is perpendicular to the pilot bore surface of the flywheel housing Rotate the flywheel through 360 degrees The total indicator reading should not exceed SAE 0 Housing 10 254 mm SAE 1 Housing 008 203 mm 2 7 3 Flywheel Face Runout Deviation Check Mount the indicator base on ...

Page 12: ...ading should not exceed SAE 0 Housing 0 005 inches 0 127 mm SAE 1 Housing 0 005 inches 0 127 mm 3 0 MAINTENANCE 3 1 Lubrication Requirements 3 1 1 Grease Specification USE ONLY NGLI National Grease Lubrication Institute APPROVED High grade lithium base 2 short fibre grease with an EP Extreme Pressure additive recommended for use in high speed roller bearings operating at 200 F 93 3 C 3 1 2 Grease ...

Page 13: ...h Linkage And Levers Lubricate sparingly with engine oil every 500 hours of operation 3 2 5 Pilot Bearing Except Non Greasable Type Using a hand operated grease gun add 1 or 2 shots of grease per 100 hrs of operation 3 2 6 Pilot Bearing Non greasable Type Cartridge type pilot bearings are sealed units and require no additional lubrication The lubrication intervals and the amount of grease used sho...

Page 14: ... correct engagement pressure is the responsibility of the owner operator The owner operator must periodically adjust the clutch to ensure correct clutch operation See section 3 5 The clutch should be adjusted if the force required to engage the clutch drops by 10 15 of the specified engagement force Destructive damage may have already occurred if engagement force is allowed to diminish to the poin...

Page 15: ...on both ends of the cross shaft Note These values include a 15 allowance for friction within the clutch release mechanism 3 4 2 Spring Scale Method Using A Standard Handle Determine whether the engagement force is correct Measure the distance from the bottom of the handle grip location to the center of the cross shaft Attach a spring scale to the handle at the location specified below and pull the...

Page 16: ...ing 407 OR BEND it away from the adjustment lock finger The lock spring will be damaged and may not fit snugly in the detent slot of the adjustment lock finger Rotate the adjusting ring clockwise to tighten the clutch Rotating the adjusting ring counter clockwise will loosen the clutch Adjust to obtain the proper clutch engagement force by using one of the methods described in section 3 4 Torque w...

Page 17: ...n facing s will become glazed and possibly permanently damaged if the clutch is permitted to slip excessively 4 0 INSTALLATION INFORMATION 4 1 Preparation Do not disengage the clutch before installing the PTO on the engine Disengagement allows the clutch plates to slip out of the correctly aligned positions established at NACD 4 1 1 If the facing plates have become misaligned they may be realigned...

Page 18: ...Lubrication Required Before Installation 4 3 1 See section 3 1 for information on the type s of lubricant s required 4 3 2 Lubricate as follows before installation See illustration in section 3 2 for locations of grease fittings Release Bearing except non greasable type Bronze and greasable ball type release bearing With a hand operated grease gun add 1 or 2 pumps of grease per 8 10 hrs operation ...

Page 19: ...r centrifugal force Loctite 515 or equivalent is suggested 4 4 3 Proceed as follows For greasable pilot bearing ONLY bearing has a grease shield on 1 side only Pack the flywheel pilot bearing cavity with grease Install the pilot bearing in the flywheel or adapter with the grease shield of a greasable bearing toward the PTO and clutch Be sure that the pilot bearing spacer if used is in place Two ty...

Page 20: ...Many engines use metric threads so the following chart would not be applicable Do not use bolts made with U S threads in holes with metric threads The threads will be damaged rendering them unusable Use the engine manufacturer s torque specifications if different from the above torque recommendation 4 4 5 Rap the output end of the shaft with a soft mallet to relieve any pre load on the engine cran...

Page 21: ...d bearing be in close alignment The outboard bearing will help to support the side loads imposed on the PTO shaft by the belts If the three bearings are not installed so that the center of the PTO shaft is in a straight line reduced bearing life will occur It is therefore important that the internal PTO bearings be properly installed and adjusted and that neither support plate nor the outboard bea...

Page 22: ...ft The pulley must be mounted so that the center of the side load is as close to the center of the main bearings as possible 4 8 Attaching and shimming an outboard shaft support bearing optional output special applications only NOTE Perform the following procedure carefully and precisely Misaligned bearings result in PTO failures 4 8 1 The power take off must be bolted to the engine 4 8 2 Align th...

Page 23: ...Set the dial indicators to 0 4 8 6 Properly torque the bolts securing the outboard bearing to the support member CONFIGURATION A1 A2 18 Config No Bolt Circle Dia B No of Holes Hole Dia Radius C Pilot Dia A 7 501 7 503 679 5 38 9 25 6 7 876 7 879 679 5 38 9 25 6 A1 A2 Radius C 50 Bolt circle B 45 x 060 Chamfer A 6 Thru holes equally spaced on bolt circle B Mounting holes and mounting configuration ...

Page 24: ...e PTO clutch should normally be engaged with the engine operating below 1 000 RPM After the load has been brought up to engine speed and the clutch is no longer slipping the engine speed may be increased to operating speed 5 1 2 Where high inertia loads must be picked up engaging the clutch at 1 000 RPM may result in stalling the engine Heavy inertia loads may be brought up to speed by a series of...

Page 25: ...2 1 1 1 1 Qty 1 2 1 2 2 1 1 1 1 1 1 1 Item Name Bell Housing Name Plate w gasket Bolt Grease Fitting Jam Nut Grease Fitting Drive Shaft Main Bearings Bearing Retainer Adjustment Lock Lock Bolt Lockwasher Item Name Cross Shaft Woodruff Key Release Yoke Bolt Washer Shifting Lever Assy Shifting Lever Bolt Washer Output Key Pilot Bearing Nut Item Name Locking Washer Clutch Key Grease Hose Grease Fitti...

Page 26: ... 2 Qty 2 1 1 1 1 1 1 1 1 1 2 1 Item Name Bell Housing Name Plate w gasket Bolt Grease Fitting Jam Nut Grease Fitting Drive Shaft Main Bearings Cross Shaft Woodruff Key Release Yoke Bolt Item Name Washer Shifting Lever Assy Shifting Lever Bolt Washer Output Key Pilot Bearing Nut Locking Washer Clutch Key External Snapring Bearing Housing Item Name Grease Hose Grease Fitting Bolt Lockwasher Internal...

Page 27: ... 1 Item Name Clutch Assembly includes all parts listed below except 935 Drive Ring Clutch Body Facing Plate Center Plate Pressure Plate Adjusting Ring Assy Release Lever Release Sleeve Bearing Carrier Item Name Release Bearing Internal Snapring External Snapring Drive Ring Adjustment Lock Finger Lock Pin Adjusting Ring Wear Ring Machine Screw Tapping Screw Lock Spring Item Name Lock Washer Clevis ...

Page 28: ... the shaft 7 1 5 Slide the handle off of the cross shaft spline 7 2 Remove the power take off from the engine 7 2 1 Attach a hoist or other suitable lifting device to the power take off Attach at 3 points spanning the center of gravity to hold the shaft in a horizontal position during removal 7 2 2 Remove the mounting bolts removing those located near the top last The PTO should separate from the ...

Page 29: ...7 3 4 Position the PTO with the pilot bearing end up resting with support beneath the end of the output shaft the impact force of the mallet blow in step 7 3 7 will therefore be absorbed through the shaft rather than across the main bearing s Caution Securely support the unit in a manner which properly contains the weight and size of the PTO 7 3 5 Bend the locking washer 27 away from nut 26 and re...

Page 30: ...Remove the puller when the clutch has broken loose from the shaft Caution Do not damage the pilot end of the shaft CONFIGURATION A CONFIGURATION B If installed too deep legs can damage facings or center plate 3 4 10 threaded holes Bell Housing 1 Bearing Housing 30 Bolt 43 Lockwasher 44 Bell Housing 1 Lockwasher 13 Lock Bolt 12 Adjustment Lock 11 Bearing Retainer 10 Drive Shaft 8 Main Bearings 9 Lo...

Page 31: ...ing 30 Drive Shaft 8 Main Bearing 9 Bolt 43 Lockwasher 44 Bell Housing 1 Main Bearing 9 External Snaprings 29 Bell Housing 1 Main Bearing 9 Drive Shaft 8 Bell Housing 1 External Snaprings 29 Lockwasher 13 Lock Bolt 12 Adjustment Lock 11 Bearing Retainer 10 Drive Shaft 8 External Snaprings 29 Bearing Retainer 10 Adjustment Lock 11 Lock Bolt 12 Lockwasher 13 Internal Snaprings 68 ...

Page 32: ...ower take offs Specials have been designed and sold but they are only slight variations of these standard configurations Note Removal of the bearing housing 30 is not mandatory but will be necessary if replacement of the bearing housing or bell housing 1 is required CONFIGURATION G CONFIGURATION F CONFIGURATION H Bell Housing 1 Bearing Housing 30 Main Bearings 9 Bolt 43 Drive Shaft 8 Lockwasher 44...

Page 33: ...ng housing unit out of the bell housing and place it on a bench 7 5 Remove the shaft and bearings from the bearing housing Configuration C Proceed at 7 5 5 Configurations A B D E F and G only 7 5 1 Remove the lock bolt 12 lockwasher 13 and adjustment lock 11 7 5 2 Rotate the bearing retainer 10 counterclockwise and remove it 7 5 3 Lift the drive shaft 8 with bearings 9 from the bearing housing a h...

Page 34: ... the bed of the press positioned under the top bearing inner race 7 6 2 Press the shaft from the bearing Caution Place a block of wood beneath the shaft to prevent it from being damaged as it falls loose Caution If the inner race of the pilot bearing is still on the shaft roller bearing style place a plug on the end of the shaft to prevent pressing against the pilot bearing inner race 7 6 3 Turn t...

Page 35: ...slowly rotate the outer race while holding the inner race The balls must roll free Rough or sticking spots must be checked to be sure they are not particles of dirt If they are clean and check again If not replace the bearing 8 2 Tapered Roller Bearings 8 2 1 Visually examine for indications of wear corrosion brinelling or pitting on races or rollers Rollers must not have flat spots or pitting Bea...

Page 36: ...n etc which would prevent the bearing housing from locating properly in the bell housing bore or against the bell housing face An improper fit causes misalignment Misalignment is a major cause of power take off failure 8 3 6 Cross shaft holes should not be worn more than 015 381 mm out of round A little wear does not render the parts unserviceable but excessive wear can cause binding of the cross ...

Page 37: ...ll indentation below the surface is not detrimental 8 6 Cross Shaft 8 6 1 Be sure the cross shaft moves freely in the bell housing Remove rust or corrosion from the cross shaft and the holes in the bell housing Wear on the cross shaft does not become detrimental until it inhibits smooth rotation during clutch engagement creates a false clutch engagement pressure reading or allows moisture dirt or ...

Page 38: ...must not be worn so as to allow side movement of keys 8 8 6 Clutch taper should not be worn although a small amount of wear if worn evenly 360 around the shaft may be serviceable as long as the clutch will seat securely and squarely and the jam nut will tighten against the clutch body If too much wear has occurred the clutch will slide too far onto the taper and the jam nut will bottom out on the ...

Page 39: ...s 417 and clevis pins 416 to Seperate the links 413 from the levers 123 9 3 Disassemble the sleeve and bearing assembly 9 3 1 Ball type release bearing remove the grease hose 32 if the bearing is a greasable style 9 3 2 Remove retainers 415 and clevis pins 414 to remove the connecting links 413 from the release sleeve 9 2 Remove the release sleeve and bearing assembly Note Sleeve used with bronze ...

Page 40: ...ing match mark the two halves of the bronze release bearing 127 Observe whether a machined side is up or down so it may be reinstalled in the same direction 9 3 8 Remove the grease hose 32 9 3 9 Remove retainers 415 and clevis pins 414 to remove the links 413 from the release sleeve 125 9 3 10 Loosen and remove 2 bolts and nuts holding the release bearing together Remove the release bearing from t...

Page 41: ...irection Remove retainers 410 washers 412 and clevis pins 409 to Seperate the levers and lever springs 411 from the pressure plate 112 10 0 INSPECT THE CLUTCH COMPONENTS 10 1 Clutch Body 10 1 1 Friction surface must not have heat cracks must be smooth and must be flat within 005 127 mm 10 1 2 Splines must not have wear marks exceeding 003 076 mm depth due to wear from the pressure plate or center ...

Page 42: ...es must not be excessively worn A small amount of wear is normal and will not be detrimental 10 3 Release sleeve 10 3 1 No fractures should exist in the bosses 10 3 2 Clevis pin holes must not be excessively worn A small amount of wear is normal and will not be detrimental 10 3 3 The release sleeve bore should not be worn beyond the limits shown below 10 3 4 for ball type release bearing Snapring ...

Page 43: ...0 5 Bearing Carrier ball type release bearing only 10 5 1 Flat areas are usually worn on the trunnions Measure the trunnion diameter Replace if worn less than 730 18 54 mm 10 5 2 The snapring groove must securely hold the snapring Basic Size 137 max width 147 3 734 mm Basic Size 120 max width 130 3 302 mm 10 5 3 The bearing fit may be a sliding fit but must be snug A slightly tight fit is desirabl...

Page 44: ...ed 10 9 Levers 10 9 1 Clevis pin holes must not be excessively worn A small amount of wear is normal and will not be detrimental 10 9 2 Minimum width of the lever at the pressure plate end is 740 18 796 mm Minimum width of the lever at the link end is 493 12 522 mm 10 10 Lever Spring 10 10 1 When assembled with a lever on a pressure plate 40 force minimum at the upper hole of the lever should be r...

Page 45: ...e bearing until the shoulder of the release sleeve stops against the bearing inner race 11 1 10 Install external snapring 129 to retain the bearing on the release sleeve Proceed to 11 1 13 11 1 2 Place the internal snapring 128 on top of the bearing before proceeding to 11 1 3 11 1 3 Press the release sleeve 125 into the bearing until the shoulder of the release sleeve stops against the bearing in...

Page 46: ...e travel stop protruding from one side of each link should point toward the pressure plate away from the release bearing and must rest against the release sleeve 11 1 14 Install the clevis pin 414 through both links and the protruding boss as shown 11 1 15 Securely install the retainer 415 in the groove of the clevis pin 11 1 16 Repeat 11 1 13 thru 11 1 15 to install links on the remaining 3 bosse...

Page 47: ...d pointing outward 11 3 2 Place a lever spring 411 at each position with the legs against the pressure plate pointing outward The loop of the spring will be near the clevis pin 409 hole and the square end will be resting against and on the outside of the lever 11 3 3 Install a clevis pin 409 through the lever spring lever boss and lever with two 2 washers 412 on each clevis pin located on the outs...

Page 48: ...detent slot in the back of the finger This is the proper position of the components after the final clutch adjustment but they will not be so visible at that time 11 4 Install the release sleeve and bearing assembly on the clutch 11 4 1 Position the sleeve and bearing assembly on the clutch so the links align with the levers 11 4 2 Align the clevis pin holes and install a clevis pin 416 thru the l...

Page 49: ...lease bearing if the release bearing is a bronze type and an alternate grease hose position has been provided 12 0 ASSEMBLE THE POWER TAKE OFF 12 1 Install the Main Bearings on the Drive Shaft Configurations C and D Proceed at 12 1 5 Configuration E Proceed at 12 1 8 Configuration G Proceed at 12 1 10 12 1 1 Configurations A B and F Start one bearing cone 9 on the shaft with the wide face of the i...

Page 50: ...g firmly stops against the bearing 12 1 7 Install the remaining snapring 29 in the open groove next to the bearing Configuration C Proceed at 12 2 9 Configuration D Proceed at 12 2 12 12 1 8 Configuration E only Support beneath the inner race of main bearing 9 with a split plate on the bed of a press Insert the drive shaft through the bearing snapring groove passing through the bearing first Press...

Page 51: ...ring on the bed of a press Press the drive shaft into the bearing until the wide faces of the bearing inner races are tight against each other 12 1 15 Install external snapring 29 in the groove of the shaft 12 2 Install the drive shaft in the bearing housing Configuration C Proceed at 12 2 8 Configuration D and E Proceed at 12 2 4 12 2 1 Configurations A B F and G ONLY Support beneath the bearing ...

Page 52: ...ion the adjustment lock 11 tab in a notch align the bolt hole with the hole in the housing and install the adjustment lock bolt and lockwasher 12 and 13 Proceed to 12 3 12 2 9 Configuration C ONLY Support beneath the bearing housing with the bore up 12 2 10 Lower the drive shaft and main bearing output end of the shaft first to the bottom of the housing bore The fit should be slightly snug Gently ...

Page 53: ...ss shaft 14 through one hole 12 4 2 Slide the clutch release yoke 17 onto the cross shaft The bolt holes unthreaded end should face outward toward the flywheel Slide the cross shaft through the release yoke and into the other cross shaft hole in the bell housing 12 4 3 Rotate and position the cross shaft so one keyway is exposed in the middle of the release yoke The other keyway will be located ou...

Page 54: ... and G 13 2 1 Support the PTO with a sling and a chain hoist as illustrated 13 2 2 Insert 4 pieces of shim stock between the shaft and the bearing retainer to fill the gap and minimize sideways movement of the shaft 13 2 3 Attach a dial indicator to a solid bar clamped across the housing as shown Position the point on the nose of the shaft with the direction of indicator tip travel parallel to the...

Page 55: ...attained 13 2 8 Install the adjustment lock 14 0 INSTALL THE CLUTCH ON THE DRIVE SHAFT 14 1 Support the PTO under a hoist with the output end of the drive shaft resting on a hard wood block 14 2 Install 3 4 10 eyebolts in the holes located in the front flywheel face of the clutch body Suspend the clutch on the hoist Caution Do not thread too deep See 7 3 6 14 3 Carefully lower the clutch on the dr...

Page 56: ...perly and in alignment If the readings exceed the maximum T I R total indicator reading repeat installation of the clutch and or housings to bring the readings into specifications 14 11 1 Securely support the PTO beneath the rear of the housing with the bell housing and clutch end up The output shaft end must hang free and be suspended on the bearing races 14 11 2 Mount the base of a dial indicato...

Page 57: ...the lock nut 6 14 13 Install the grease fitting 5 in the end of the grease hose if used 14 14 Lubricate the PTO See sections 3 1 and 4 3 14 15 Final clutch adjustment may be made after the Power Take Off is installed on the engine Refer to sections and for final clutch adjustment information 14 16 Refer to section for Power Take Off installation and lubrication instructions 15 0 TROUBLESHOOTING GU...

Page 58: ...h disc Bearing overloaded lack of lube improper bearing for application Improper application In line vs side load Improper lube intervals improper grease incorrect bearing setting if applicable Clutch pressure must be set with spring pull scale or torque wrench see section and 3 5 Replace complete clutch with new assembly Engage with engine speed less than 1000 RPM see section 5 0 Check for proper...

Page 59: ...e 5 The warranty is void unless the product or part is properly installed and maintained within the rated capacity of the product or part with installations properly engineered and in accordance with the practices methods and instructions approved or provided by NACD 6 The warranty is void unless all required replacement parts or products are of NACD origin or are NACD authorized replacement parts...

Page 60: ...thin this manual NACD assumes no responsibility for any errors that may appear in this manual and shall not be liable under any circumstances for incidental consequential or punitive damages in connection with or arising out of the use of this manual The information contained within this manual is subject to change without notice ...

Page 61: ......

Page 62: ...North American Clutch Driveline P O Box 15130 Rockford IL 61132 Phone 800 383 9204 Fax 815 282 9160 www naclutch com ...

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