NACD 1019024AM Manuel utilisateur
NACD Power Take-Off Service Manual
1019024AM
14” HD, 14” HD(DP) and 14” HD(TP) Clutches
Includes Installation, Operation, Maintenance and Overhaul Instructions
North American Clutch & Driveline
Rockford, Illinois
Phone: (800) 383-9204
(815) 282-7960
Fax (815) 282-9160
www.naclutch.com
North American Clutch & Driveline
Rockford, Illinois
Phone: (800) 383-9204
(815) 282-7960
Fax (815) 282-9160
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 specied. 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 specied 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 specied 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: (800) 383-9204
(815) 282-7960
Fax (815) 282-9160
www.naclutch.com
1.0 INTRODUCTION
1.1 Part Numbering System
1.2 Locating The Part Number And Serial Number
2.0 GENERAL INFORMATION, SPECIFICATIONS & RECOMMENDATIONS
2.1 Basic Dimensions for SAE Housings
2.2 Basic Dimensions for SAE Flywheels
2.3 Application Guidelines
2.4 Allowable Side Load Pulls
2.5 Maximum Safe Operating Speeds
2.6 Required Clutch Torque Capacity
2.7 Alignment Tolerances For Flywheels & Flywheel Housings
3.0 MAINTENANCE
3.1 Lubrication Requirements
3.1.1 Grease Specication
3.1.2 Grease Specication 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
4.3 Lubrication Required Before Installation
4.4 Install the PTO on the engine
4.5 Correct Handle Installation Position
4.6 Check Clutch Engagement Pressure
4.7 Support plate shimming and alignment
4.8 Outboard bearing shimming and alignment
5.0 OPERATION
5.1 Clutch Engagement Procedure
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2
2
3
3
3
4
4
5
5
5
7
7
7
7
7
9
9
10
10
11
11
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TABLE OF CONTENTS
North American Clutch & Driveline
Rockford, Illinois
Phone: (800) 383-9204
(815) 282-7960
Fax (815) 282-9160
www.naclutch.com
6.0 EXPLODED VIEWS - TYPICAL POWER TAKE-OFFS
6.1 PTO Exploded Views (exclude clutch)
6.2 Clutch Assembly Exploded View
7.0 DISASSEMBLE THE POWER TAKE-OFF
7.1 Remove accessories attached to the PTO
7.2 Remove the PTO from the engine
7.3 Remove the clutch from the shaft
7.4 Separate the bearing housing from the bell housing
7.5 Remove the shaft and bearings from the bearing housing
7.6 Remove the main bearings from the shaft
7.7 Remove the cross shaft
8.0 INSPECT THE POWER TAKE-OFF COMPONENTS
9.0 DISASSEMBLE THE CLUTCH
9.1 Preparation For Disassembly
9.2 Remove the release sleeve and bearing sub-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 ASSEMBLE THE POWER TAKE-OFF
12.1 Install the Main Bearings on the Drive Shaft
12.2 Install the drive shaft in the bearing housing
12.3 Join the bearing housing and bell housing
12.4 Install the cross shaft and clutch release yoke
12.5 Complete the assembly of the housing unit
13.0 ADJUST THE MAIN BEARING END PLAY
14.0 INSTALL THE CLUTCH ON THE DRIVE SHAFT
15.0 TROUBLESHOOTING GUIDE
16.0 WARRANTY
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TABLE OF CONTENTS
North American Clutch & Driveline
Rockford, Illinois
Phone: (800) 383-9204
(815) 282-7960
Fax (815) 282-9160
www.naclutch.com 2
1.0 INTRODUCTION
Performance of the following procedures by the owner and operator should ensure
reliable PTO operation.
1.1 Part Numbering System
NACD Power Take-Off part numbers have changed in the way they were displayed in
print over the years, primarily due to advances in technology.
The part number format for an NACD Power Take-Off is 4XXXXXAM, where XXXXX
is a 5 digit alpha 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 prex may have been written at one time or another.
1.2 Locating The Part Number And Serial Number
Refer to the nameplate for part number information. The serial number will be stamped
into the bell housing in the location shown in the bottom picture.
SAE Housing Size
& Clutch Size NACD Part #
Customer Part #
Serial #
North American Clutch & Driveline
Rockford, Illinois
Phone: (800) 383-9204
(815) 282-7960
Fax (815) 282-9160
www.naclutch.com
3
2.0GENERALINFORMATION,SPECIFICATIONS&RECOMMENDATIONS
2.1 Basic Dimensions for SAE Housings
2.2 Basic Dimensions for SAE Flywheels
SAE
Hsg
No.
Clutch
Size
“0”
“1”
14
14-DP
14-TP
14-TP
18.375
18.375
18.375
18.375
17.250
17.250
17.250
17.250
1.00
1.00
1.00
1.00
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 unless
otherwise specied. “D”= Depth of pilot
bore from housing face to shoulder on
ywheel or to crankshaft ange face.
All dimensions are in Inches unless otherwise specied.
North American Clutch & Driveline
Rockford, Illinois
Phone: (800) 383-9204
(815) 282-7960
Fax (815) 282-9160
www.naclutch.com 4
2.3a Application Guidelines
NACD 14” HD, 14” HD(DP) and 14” HD(TP) Power Take-Offs designed with tapered
roller type main bearings (9)(see illustration in section 6.1) are not approved for in-line
drive applications.
2.3b Application Guidelines
Segmented facings in 2-plate (DP) and 3-plate (TP) Clutches - NACD does not approve
the use of segmented facings in 2-plate (DP) and 3-plate (TP) clutches.
2.4 Allowable Side Load Pulls
The following formula can be used to estimate applied side loads. Loads are calculated
on proper tensioning of belts. If belts are tightened excessively, the resulting side load
can exceed the calculated value. If 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
allowable side load charts cannot be furnished unless bearing information is known.
Please contact the NACD sales department to obtain an application data sheet for
engineering review.
L =xF 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
North American Clutch & Driveline
Rockford, Illinois
Phone: (800) 383-9204
(815) 282-7960
Fax (815) 282-9160
www.naclutch.com
5
2.5 Maximum Safe Operating Speeds
Maximum safe operating speed is 2200 rpm for NACD Power Take-Offs with 14” HD,
14” HD (DP) or 14” HD (TP) clutches used for either in-line or side load drives.
2.6 Required Clutch Torque Capacity
To determine the actual torque capacity required of a clutch used for any given
application the maximum engine torque and torque service factor must be considered.
See the following chart and formula to calculate the proper clutch capacity required for
the application.
2.7 Alignment Tolerances For Flywheels & Flywheel Housings
NOTE: NACD recommends that engine ywheel housings used with NACD PTO’s be
made of quality cast iron or other material of equal or better strength. Aluminum ywheel
housings have been found to provide insufcient strength to properly maintain bearing
alignment and support the weight and forces related to the application.
Check the alignment of the engine ywheel and the engine ywheel housing. Excessive
bore and face runout of the ywheel, ywheel housing, and ywheel 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 Torque x Service Factor
Blower or Vacuum
Centrifugal with free ow of air
With high start-up inertia or subject
to choking of air supply
Compressors
Reciprocating, 1 or 2 cylinders
Reciprocating, 3 or more cylinders
Roto screw or turbine
Conveyor
Fed uniformly
Not fed uniformly
Recriprocating
Drills
Generator
Pump
Centrifugal or Turbine
Dredge
Mud or reciprocating
Rock Crusher, Hammer Mill
Snow Blower
Wood Chipper, Saw Mill
Ratings: Shafts, bearings and clutch capacities are rated on a conservative
basis. For unusually heavy starting loads, frequent engagment service,
or if prime mover is engine of less than 4 cylinders, consult our sates
representatives for recomendations. Extremely low speed engines require
special consideration.
1.7
4.0
4.0
2.5
2.0
1.5
2.0
3.0
2.0
2.0
1.5
2.0
3.0
3.0
2.0
3.0
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