NACD 11.5 User manual

NACD Power Take-Off Service Manual
1016070AM
11.5" TP Power Take Off
Includes Installation, Operation, Maintenance and Overhaul Instructions

North American Clutch & Driveline
Rockford, Illinois
Phone: [phone]
[phone]
Fax [phone]
www.naclutch.com

North American Clutch & Driveline
Rockford, Illinois
Phone: [phone]
[phone]
Fax [phone]
www.naclutch.com
NOTICE
IMPORTANT INFORMATION
It is imperative that proper installation, maintenance, operation and safety procedures be followed explic-
itly regarding products manufactured by North American Clutch & Driveline.
GENERAL:
Safe working and operating practices must be employed by all personnel working on, with, or near NACD
products. NACD will not be responsible for personal injury.
SAFETY NOTICE:
Accidents may result from use of manufactured products, resulting in possible danger to
person(s) or property. Therefore, it is important and imperative that correct, safe procedures
be followed. Products must be installed, maintained, operated and used in accordance with
the engineering information specied. Continual and repeated inspections and observations
should 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 specied 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 / OPERATOR / USER RESPONSIBILITIES:
Knowledge of and performance of the procedures specied in this publication are the responsibility of the
owner(s), operator(s), user(s) and all person(s) working on or near the products described herein. Follow-
ing these procedures and explicit adherence to the information described should ensure safe and reliable
use, repair, and operation of products provided by NACD.
WARRANTY:
NACD’s limited Warranty is described in detail in this publication. It is the responsibility of the original pur-
chaser or manufacturer, successive buyers, users, third parties or employees to make themselves aware
of this warranty and all conditions it contains.

North American Clutch & Driveline
Rockford, Illinois
Phone: [phone]
[phone]
Fax [phone]
www.naclutch.com 1
INTRODUCTION
General Information
Replacement Parts
Parts Shipment
Preventative Maintenance/Troubleshooting
Safety
Sources of Service Information
Warranty
DESCRIPTION & SPECIFICATIONS
General
INSTALLATION
Preliminary Checks
Drive Ring Installation
Pilot Bearing Installation
Power Take-Off Installation to Engine Driving Member
Installation Tips
Torque Values for Fasteners
Allowable Side Loads
PREVENTATIVE MAINTENANCE
Lubrication
Clutch Adjustment
DISASSEMBLY
ASSEMBLY
2
2
2
3
3
4
4
5
5
5
6
6
8
8
9
10
12
14
15
15
16
16
19
TABLE OF CONTENTS

North American Clutch & Driveline
Rockford, Illinois
Phone: [phone]
[phone]
Fax [phone]
www.naclutch.com
2
INTRODUCTION
General Information
This publication provides the information necessary for the operation and maintenance
of the NACD Power Take Off specied on the cover of this manual. Specic engineering
details and performance characteristics can be obtained from the Engineering
Department of NACD, Rockford, Illinois, USA.
Operation and maintenance personnel responsible for this equipment should have this
manual at their disposal and be familiar with its contents. Applying the information in the
manual will result in consistent performance from the unit and help reduce downtime.
Replacement Parts
Parts Lists
Engineering assembly drawings and bill of materials are provided in appropriate sections
of this manual to facilitate ordering spare or replacement parts.
Ordering Parts
All replacement parts or products (including hoses and ttings) must be of NACD
origin or equal, and otherwise identical with components of the original equip-
ment. Use of any other parts or products will void the warranty and may result in
malfunction or accident, causing injury to personnel and/or serious damage to the
equipment.
Renewal parts and service parts kits may be obtained from any authorized NACD
distributor or service dealer.

North American Clutch & Driveline
Rockford, Illinois
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[phone]
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Parts Shipment
Furnish the complete shipping information and postal address. All parts shipments made
from the factory will be FOB factory location, USA. State specically whether the parts
are to be shipped by freight, express, etc. If shipping instructions are not specied, the
equipment will be shipped the best way, considering time and expense. NACD will not
be responsible for any charges incurred by this procedure.
NACD, having stipulated the bill of material number on the unit’s nameplate, absolves
itself of any responsibility resulting from any external, internal or installation changes
made in the eld without the express written approval of NACD. All returned parts, new
or old, emanating from any of the above-stated changes will not be accepted for credit.
Furthermore, any equipment which has been subjected to such changes will not be cov-
ered by a NACD warranty.
Preventative Maintenance/Troubleshooting
Frequent reference to the information provided in this manual regarding daily operation
and limitations of this equipment will assist in obtaining trouble-free operation. Sched-
ules are provided for the recommended maintenance of the equipment and, if observed,
minimal repairs (aside from normal wear) will result.
Lifting Bolt Holes
Most NACD products have provisions for attaching lifting bolts. The holes provided are
always of adequate size and number to safely lift the NACD product.
These lifting points must not be used to lift the complete power unit. Lifting exces-
sive loads at these points could cause failure at the lift point (or points) and result
in damage or personal injury.
Select lifting eyebolts to obtain maximum thread engagement with bolt shoulder tight
against housing. Bolts should be near but should not contact bottom of bolt hole.

North American Clutch & Driveline
Rockford, Illinois
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[phone]
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4
Safety
General
Safe practices must be employed by all personnel operating and servicing this unit. NACD will not be
responsible for personal injury resulting from careless use of hand tools, lifting equipment, power tools, or
unaccepted maintenance/operating practices.
Important Safety Notice
Because of the possible danger to person(s) or property from accidents which may result from the use of
manufactured products, it is important that correct procedures be followed. Products must be used in
accordance with the engineering information specied. Proper installation, maintenance, and operation
procedures must be observed. Inspection should be made as necessary to assure safe operations under
prevailing conditions. Proper guards and other suitable safety codes should be provided. These devices
are neither provided by NACD nor are they the responsibility of NACD. The maximum safe operating
speeds of this 11.5" triple plate (TP) NACD power take-off is 2800 RPM.
Sources of Service Information
Each series of manuals issued by NACD is current at the time of printing. When required, changes are
made to reect advancing technology and improvements in state-of-the-art.
Individual product service bulletins are issued to provide the eld with immediate notice of new service
information.
For the latest service information on NACD products, contact any NACD distributor, or contact the sales
department, NACD, PO Box 15130, Rockford, IL 61132-5130, USA or by email at [email protected].

North American Clutch & Driveline
Rockford, Illinois
Phone: [phone]
[phone]
Fax [phone]
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DESCRIPTIONS & SPECIFICATIONS
General
The NACD 11.5" TP Power Take-Off are engine mounted power take-offs that use cast
iron two-piece housings and contain an integral triple plate clutch 11 1/2 inches in di-
ameter. The engine drives the clutch through a drive ring that is bolted to the engine
ywheel and connected to the clutch through internal teeth that mesh with external teeth
on the clutch friction plate(s). Clutch engagement and disengagement for most units is
accomplished by use of the external hand lever assembly. Some units may use other
actuation methods.
Main bearings are lubricated and cooled with grease. Most units use pilot bearings that
are pre-lubricated and sealed for life, although some may require periodic re lubrication.
Those that require periodic lubrication are lubricated through a grease tting located in
the output end or side of the clutch shaft.
Warranty
Equipment for which this manual was written has a limited warranty. For details of the
warranty, refer to the warranty statement at the end of this manual.

North American Clutch & Driveline
Rockford, Illinois
Phone: [phone]
[phone]
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INSTALLATION
Preliminary Checks
Note: All measurements must be taken with the engine or motor mounted on its sup-
ports after the ywheel and housing have been thoroughly cleaned.
1.
2.
Figure 1: Checking Flywheel Housing Face
3.
4.
Figure 2: Checking Flywheel Housing Bore
5.
6.
Measure and record the engine crankshaft or motor shaft end play using a dial indica-
tor. Record this value, as it will be used later. ______________
Attach the indicator to the ywheel so the indicator is perpendicular to the ywheel
housing face and the indicator stem rides on the ywheel housing face.
See Figure 1.
Rotate the shaft through on entire revolution
and note the run out. The total indicator reading
must not exceed .008" (.2mm). Apply thrust onto
crankshaft in one direction to prevent crankshaft
end play from affecting run out measurement.
Reading the indicator so the stem rides on the
pilot bore of the ywheel housing. See Figure 2.
Rotate the shaft through one entire revolution
and note the run out. The total indicator reading-
should not exceed .008" (.2mm).
Remove the indicator base from the ywheel
and attach it to the ywheel housing face. Posi-
tion the indicator stem so that it rides where the
drive ring will set on the ywheel face.
See Figure 3.
Figure 1
Figure 2
6

North American Clutch & Driveline
Rockford, Illinois
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Figure 3: Checking Drive Ring Surface of Flywheel
7.
8.
Figure 4: Checking Drive Ring Pilot Bore of Flywheel
9.
10.
Figure 5: Checking Pilot Bearing Bore of Flywheel
11.
Rotate the shaft through one entire revolution
and note the face run out of the ywheel. The
total indicator reading must not exceed .0005"
.01 mm) per inch (25.4 mm) of ywheel diameter.
Apply thrust onto crankshaft in one direction to
prevent crankshaft end play from affecting run
out measurement.
Readjust the indicator stem so it rides on the
driving ring pilot bore of the ywheel. See
Figure 4.
Rotate the shaft through one entire revolution
and note the driving ring bore eccentricity. The
total indicator reading must not exceed .005"
(.13 mm).
Adjust the indicator stem so that it rides on
the pilot bearing bore cavity. See Figure 5.
Rotate the shaft through one entire revolution
and note the pilot bearing bore eccentricity. The
total indicator reading must not exceed .005"
(.13 mm).
Figure 3
Figure 4
Figure 5
7

North American Clutch & Driveline
Rockford, Illinois
Phone: [phone]
[phone]
Fax [phone]
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Drive Ring Installation
1.
2.
Drive ring attachment screws must be grade 8. Do not use substitutes.
Pilot Bearing Installation
FOR GREASABLE PILOT BEARING ONLY: If a pilot bearing adapter is used on the
ywheel, be sure the mating surfaces between the adapter and the ywheel face are
sealed, to prevent loss of grease from the pilot bearing grease cavity due to vacuum or
centrifugal force. Loctite 515 or equivalent is suggested.
Proceed as follows:
FOR GREASABLE PILOT BEARING ONLY (BEARING HAS A GREASE SHIELD ON 1
SIDE ONLY): Pack the ywheel pilot bearing cavity with grease. Install the pilot bear-
ing in the ywheel or adapter with the grease shield of a greasable bearing towards the
PTO and clutch. Be sure that the pilot bearing spacer, if used, is in place. Two types of
spacers may be used. Spacers may be installed in the ywheel to keep the pilot bearing
from going too far into the bore in the ywheel, and a spacer may be used on the pilot
end of the PTO shaft between the pilot bearing and the PTO to help maintain proper pilot
bearing location in the ywheel bore.
FOR NON-GREASABLE PILOT BEARING ONLY (BEARING HAS 2 GREASE SEALS):
Non-greasable, double-sealed pilot bearings require no re-lubrication and may be in-
stalled in the ywheel or adapter with either side toward the PTO and clutch. The shaft
should have no grease ttings. If it does, remove the grease tting(s) and replace with
pipe plugs as a precaution to insure grease is not forced into the pilot bearing cavity of
the ywheel. A build-up of pressure caused by forcing grease into the cavity can cause
the pilot bearing to be forced out of the ywheel, resulting in a bearing or shaft failure.
Clean the drive ring and ywheel of any dirt or debris as necessary.
Position the drive ring against the ywheel and secure with eight hex head cap-
screws. Torque the capscrews to the proper specications given in Torque Values
for Fasteners.
8

North American Clutch & Driveline
Rockford, Illinois
Phone: [phone]
[phone]
Fax [phone]
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Power Take-Off Installation to Engine or Driving Member
1.
2.
3.
4.
5.
Engine and/or power take-off failure will result form any excessive preload
on components.
6.
Clean the power take-off housing ange, ywheel housing ange, and pilot bearing
bore or any debris. Install two alignment studs into the ywheel housing to assist
with the power take-off installation.
Install 2 or 3 guide studs in the ywheel housing. Position the power take-off against
the ywheel housing, carefully aligning the main shaft pilot with the pilot bearing bore
and the driving plates with the drive ring.
Secure the power take-off housing to the ywheel housing with 12 hex-head cap-
screws. Torque the capscrews to the proper specications given in Torque Values
for Fasteners.
Note: Power take-off housing to ywheel housing attachment screws must be grade
5 or better.
Rap the output end of the clutch shaft with a soft hammer to remove any preload on
the main bearings and/or pilot bearing.
Note: This step must not be omitted. Bearing failure may result.
Measure the crankshaft end play again. The measurement must be the same exact
value as recorded from Step 1 under Preliminary Checks. Locate and correct the
source or preload if the end play is not the same value.
Install the key on the output shaft and install the drive sheave, chain sprocket, or u-
joint ange as the application requires.
Note: A power take-off support plate mounted at the output bearing retainer is con-
sidered mandatory for this unit.
9

North American Clutch & Driveline
Rockford, Illinois
Phone: [phone]
[phone]
Fax [phone]
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Installation Tips
Avoid excessive misalignment between the engine and power take-off. Check the fol-
lowing if abnormal wear of parts exists:
Verify the power take-off is properly lubricated prior to starting the engine. All
serviceable points have a hydraulic ("zerk") grease tting. See lubrication in Main-
tenance for more information. Improper lubrication will result in premature failure
of components.
Verify the clutch is adjusted according to the procedure outlined in Clutch Adjustment
in Maintenance. Failure to do so will result in premature clutch wear and failure.
NACD will not be responsible for any damage or injury resulting from improper ad-
justment and/or lubrication. This includes any accessory drives and loads.
Excessive loads tend to deect parts to which power take-offs are mounted. A dial
indicator can be mounted on a rigid part of the engine or independently on the foun-
dation to determine deection under actual operating conditions.
Readings taken before the drive is installed with the engine standing still and when
under operating conditions will indicate the extent of deection. In no case should
the deection exceed .010" at the bearing carrier. See Figure 6.
Avoid excessive tightening of belts or chains. See Table 5 for allowable side load
information.
10

North American Clutch & Driveline
Rockford, Illinois
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Figure 6: Determining Deection While Applying Side Loads
The dial indicator should not be applied while the unit is operating. This could re-
sult in damage to the dial indicator.
11

North American Clutch & Driveline
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12
Torque Values for Fasteners
Note: All threads and bearing face to be lubricated with light oil lm prior to assembly.
Table 1. U.S. Standard Fine and Coarse Thread Capscrews, Bolts, and Nuts
Table 2. Metric Coarse Thread Capscrews, Bolts, and Nuts
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1 1/8
1 1/4
Thread
Diameter
6 - 8
13 - 17
25 - 29
37 - 43
60 - 70
82 - 98
120 - 140
205 - 245
330 - 390
495 - 595
615 - 745
850 - 1000
lb - ft
SAE Grade 5
8 - 11
18 - 23
34 - 39
51 - 58
81 - 95
111 - 132
163 - 190
278 - 332
448 - 528
671 - 806
834 - 1010
1163 - 1355
Nm lb - ft
SAE Grade 8
Nm
10 - 12
20 - 24
35 - 41
55 - 65
83 - 97
120 - 140
165 - 195
295 - 345
470 - 550
715 - 845
1015 - 1185
1375 - 1625
14 - 16
27 - 32
48 - 55
75 - 88
113 - 131
163 - 190
224 - 264
400 - 467
638 - 745
970 - 1145
1377 - 1606
1865 - 2203
Thread
Size
M6
M8
M10
M12
M16
M20
M24
M30
6.5 - 7.5
16 - 18
32 - 36
55 - 63
132 -151
257 - 295
445 - 511
714 - 820
9 -10
21 - 25
43 - 49
74 - 86
179 - 205
348 - 400
603 - 693
987 - 1113
9 -10
23 - 26
44 - 51
77 - 88
189 - 217
364 - 418
626 - 720
1235 - 1421
12 -14
31 - 35
60 - 68
104 - 120
256 - 294
493 - 567
848 - 976
1674 - 1926
lb - ft
10 - 12
25 - 29
51 - 59
89 - 103
219 - 253
429 - 493
737 - 848
1475 - 1697
Nmlb - ft Nmlb - ft
Property Class 8.8Property Class 10.9Property Class 12.9
Nm
14 - 16
34 - 40
70 - 80
121 - 139
298 - 342
581 - 669
1000 - 1150
2000 - 2301

North American Clutch & Driveline
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Table 3. Tapered Pipe Plugs (with thread lubricant)
Table 4. Straight Threaded Tube Fittings, Hose Fittings, and O-Ring Plugs
NPTF Size (in) Nm ( + or -5%) Nm ( + or -5%)lb-ft (+ or -5%) lb-ft (+ or -5%)
5.5
6.5
16
17
30
34
50
55
55
7.5
9
21.5
23
40.5
46
68
75
75
8.5
10.5
25
27
50
54
80
85
85
11.5
14
34
36.5
68
73
108
115
115
1/16-27
1/8-27
1/4-18
3/8-18
1/2-14
3/4-14
1-11 1/2
1 1/4-11 1/2
1 1/2-11 1/2
Nominal
Thread
Diameter
Nm
( + or -5%)
lb-ft
(+ or -5%)
5/16
3/8
7/16
1/2
9/16
5/8
11/16
3/4
7/8
1 1/16
1 3/16
1 1/4
1 5/16
1 3/8
1 5/8
1 7/8
2 1/2
Nominal
Thread
Diameter
M10x1.0
M12x1.5
M14x1.5
M16x1.5
M18x1.5
M22x1.5
M27x2.0 (IRON)
M27x2.0 (ALUM)
M33x2.0
M42x2.0
M48x2.0
5
11.5
16
20
24.5
24.5
34
40.5
54
75
88
88
108
108
135
162
312
3.5
8.5
12
15
18
18
25
30
40
55
65
65
80
80
100
120
230
Nm
( + or -5%)
lb-ft
(+ or -5%)
26
37
47
58
74
105
179
85
326
347
441
19
27
35
43
55
77
132
63
240
256
325
13

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2000
2200
2400
2600
2800
Force lbs.
Distance X
Shaft
Speed
7220
7030
6860
6700
6570
0”
5680
5510
5370
5240
5120
1”
4340
4210
4110
4010
3920
2”
3540
3440
3350
3280
3210
3”
3010
2930
2860
2790
2730
4”
2630
2560
2500
2450
2400
5”
2350
2290
2240
2190
2140
6”
2100
2040
1990
1940
1890
7”
Allowable Side Loads
Table 1. Allowable Side Load Pulls
Figure 1. Allowable Side Load Pull
L =x F x A
126000 x H.P.
N x D
L= Actual Applied Load (lbs.)
HP = Horsepower
N= Shaft Speed (rev./min.)
D= Pitch Diameter of Pulley, etc. (in.)
F= Load Factor (see below)
A= 1.0 for low & moderate duty drives
1.4 for severe duty shock loads or large
inertia loads (reciprocating compressors,
crusher, chippers, planers, etc.)
1.0 for chain
2.5 for V belt drive
3.5 for flat belt drive
14

North American Clutch & Driveline
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LUBRICATION
Use NLGI Grade 2 grease with a minimum 300°F (149°C) drop point for all lubrication.
Operating Shaft Fittings
Grease every 500 hours of operation. Add one or two pumps of grease from a hand
operated grease gun.
Throwout Collar
Using a hand operated grease gun, add 1 or 2 pumps of grease per 500 hours of operation
(or add grease until grease begins to weep from the ID of the bearing and from between
the release sleeve and the shaft). Rotate the shaft (by hand) while adding grease.
DO NOT OVER GREASE!
Main Bearings
Apply 1 cc. of grease (one shot from a grease gun) every 6 months or 100 hours (whichever
occurs rst) through the tting in the main bearing housing.
Do not over grease. Excess grease can cause the main bearings to overheat.
Pilot Bearings
The pilot bearing supplied with most NACD power take-off units are pre-lubricated and
sealed for life. No maintenance is required. Inspection is recommended every two years
or when the power take-off is removed from the driving component for servicing. If the
pilot bearing supplied with your power take-off is to be periodically lubricated, add one
shot of grease from a grease gun every 100 hours through the tting in the output end of
the clutch shaft. DO NOT OVER GREASE!
15

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Clutch Adjustment
Note: New power take-offs must have clutch adjustment checked before being placed
into service and after the rst 4 to 8 hours of operation. This includes any power take-
offs with new driving plates. New plates have a wear in period and the clutch may re-
quire several adjustments before the new plates are worn in.
The clutch must be adjusted if it overheats, does not pull, or the operating lever jumps
from the engaged position.
Adjustment measurements are made by tting a torque wrench with a 1 1/2" socket over
the hex end located at the bottom of the hand lever. Grasp only the torque wrench when
making measurements.
1.
2.
3.
DISASSEMBLY
Power Take-Off Disassembly
1.
2.
3.
4.
Disconnect any power engagement devices from the operating shaft if so
equipped.
Remove the hand hole plate from the housing and turn the clutch shaft assembly
until the adjusting ring lock pin can be reached.
Depress the adjusting ring lock pin and turn the adjusting yoke or ring to the right (or
clockwise when looking at the ywheel) until the operating shaft requires 240-300
ft.-lb or 325-410 Nm of peak torque to engage the clutch.
Remove all attached parts from the output end of the power take-off.
Remove the hex-head capscrew securing the hand lever to the operating shaft.
Remove the twelve hex-head capscrews securing the power take-off to the engine y-
wheel housing. Use two 3/8-16UNC x 1 1/2 bolts for pusher screws in the two tapped
holes provided in the housing ange. Remove the power take-off from the engine.
Remove the 8 hex-head capscrews securing the drive ring to the engine ywheel.
16