WPT POWER PILOTLESS Instruction Manual
Page 2of 39 WIM-TD-002_C
Contents
Signal Words & Definitions
1.0 Introductions
1.1 Product Description
2.0 Exploded Views of Basic Units & Parts List for:
•“C” Style Clutch assembly
•“SP” Style Clutch assembly
3.0 Installation
3.1 Requirements for Proper Operation and Service Life
3.2 Outboard Support
3.3 Driving Ring
3.4 Installing the Unit
3.5 Clutch Adjustment
4.0 Operation
5.0 Disassembly
6.0 Assembly
7.0 Maintenance
7.1 Maintenance Schedule
8.0 General Storage Guidelines
9.0 Tables
•Speed and Size Availability
•SAE Flywheel & Housing Dimensions
•“C” & “SP” Style Lubrication Schedule
•Bolt Torque Values
10.0 Appendices
Appendix A - General
Sideload Information
OEM Clutch Pack Installation & Maintenance instructions
11.0 Trouble shooting guide
Page 3of 39 WIM-TD-002_C
Signal Words & Definitions
Throughout this manual there are several safety messages that must be read and
adhered to in order to prevent
possible loss of equipment and/or personal injury and
/or loss of life. The three signal words are “Danger”, “Warning” and
“Caution”. They are
used to indicate the severity of the hazard and are preceded by a safety alert symbol.
“Danger” - Denotes the most serious
injury hazard and is used when serious injury or death
WILL result from misuse or failure to follow the specific
instructions set forth in this manual.
“Warning” - Denotes when serious
injury or death MAY result from misuse or failure to
follow the specific instructions set forth in this manual.
“Caution” - Denotes when injury or
product or equipment damage may result from the
misuse or failure to follow the specific instructions set
forth in this manual.
Page 4of 39 WIM-TD-002_C
1.0 Introduction
Warning
Forward this manual to the person or persons responsible for
the installation and/or operation and/or maintenance of the
product described herein. Without access to this information,
faulty installation, operation and/or maintenance may occur,
which could result in equipment damage, personal injury and
even death.
Warning
Read these instructions thoroughly and review until you fully
understand all warnings and hazards before proceeding with
the work described in this manual. Failure to follow the
instructions in this manual can result in unreasonable exposure
to hazardous conditions and/or personal injury and/or death.
Warning
Use of improper tools and/or methods when installing or
servicing this unit can result in accidents causing injury and/or
death. Adequate lifting points are provided to safely handle only
the individual unit components. Lifting and handling of the
assembled will require the use of alternate methods.
Page 5of 39 WIM-TD-002_C
1.1 PRODUCT DESCRIPTION
The WPT Pilotless™ Mechanical Power Take-Off (PTO) consists of a lever-actuated clutch with a shaft
and bearings mounted in a rigid housing. The mechanical PTO is designed for inline and sideload
applications on all internal combustion engines with standard SAE industrial flywheel and flywheel housing
dimensions.
WPT mechanical PTO’S fit standard SAE housing sizes #6 thru #0. Various units are available in variety of
sizes and quantities of friction discs. Two bearings are used to distribute the applied load. Two types of
mechanism styles are available in the WPT mechanical PTO’s “C” & “SP”. WPT has a sliding sleeve
assembly using a sealed ball bearing.
WPT mechanical PTO’s nomenclatures are interpreted as such, “314 Mechanical PTO” indicates that there
are three 14” diameter Center Plates.
The WPT PTO is the most rugged PTO available on the market today. Follow the procedures detailed in
this Installation Maintenance Manual for years of service.
When performing installation and maintenance functions, refer to the drawings in this manual on pages 6
thru 13. The references on the drawings in this manual DO NOT correspond to the references on the
assembly drawing and Bill of Materials. Do not use the item numbers from the drawing in this manual for
ordering parts.
Recommended spare parts should be stocked by the customer. This will greatly reduce the possibility of
costly
downtime. Most wear items are normally stocked at the factory or local distributor and can be
shipped quickly from stock. When ordering parts, use the part numbers from the Bill of Materials supplied
with this unit. Also, please include the part number and the serial number from the unit itself, this
information will be found on the metal hand hole cover on the bell housing (see example below). Your
WPT Distributor can provide a copy of the Bill of Materials if the one provided should become lost.
Example Only, reference nameplate on PTO for correct information.
.
Page 6of 39 WIM-TD-002_C
2.0 EXPLODED VIEWS
“C”Style Ball Bearing sliding sleeve assembly
Available in sizes 6”- 10”
Item
Description
Item
Description
1
Retaining Ring
6
Clevis Pin
2
Collar
7
Clevis Pin
3
Ball Bearing
8
Link
4
Retaining Ring
9
Cotter Pin
5
Sliding Sleeve
Page 7of 39 WIM-TD-002_C
CLUTCH PACK
“C”Style Ball Bearing Assembly available in sizes 6”- 10”
Item
Description
Item
Description
1
Sliding Sleeve Assembly
5
Spring
2
Adjustment Link Assembly
6
Hub & Backplate
3
Floating Plate
7
Pin
4
Friction Disc
Page 8of 39 WIM-TD-002_C
PTO ASSEMBLY
“C”Style Ball Bearing Assembly available in sizes 6”- 10”
7”PTO Shown
Item
Description
Item
Description
1
Nut
11
Clutch Key
2
Washer
12
Shaft
3
Clutch Pack
13
Output Key
4
Driving Ring
14
Bearing
5
HHCS
15
External Retainer Ring
6
Bearing Retainer
16
Cap
7
Hand Lever Assembly
17
Grease zerk
8
Bellhouse
18
Yoke Assembly
9
Nameplate
19
Key, Woodruff
10
Bearing
20
Operating Shaft
Page 9of 39 WIM-TD-002_C
“C”Style Ball Bearing Assembly available in sizes 6”- 10”
“C” Style
The “C” style sliding assembly utilizes a sealed ball bearing design. Friction disc sizes range from 6” to 10”
with our 1 plate, 2 plate or 3 plate options. WPT PTOs meet the mounting requirements of SAE J617 and
SAE J620.
Page 10 of 39 WIM-TD-002_C
SLIDING SLEEVE ASSEMBLY
“SP”Style Ball Bearing assembly available in sizes 11”- 14”
Item
Description
Item
Description
1
Retainer Ring (Inner)
6
Link
2
Collar
7
Clevis Pin
3
Sealed Ball Bearing
8
Cotter Pin
4
Retainer Ring (Outer)
9
Plug
5
Sliding Sleeve
Page 11 of 39 WIM-TD-002_C
CLUTCH PACK
“SP”Style Ball Bearing Assembly available in sizes 11”- 14”
Item
Description
Item
Description
1
Sliding Sleeve Assembly
6
Washer
2
Adjustment Ring
7
Lever
3
Clevis Pin
8
Friction Disc
4
Cotter Pin
9
Center Plate
5
Floating Plate Assembly
10
Hub & Backplate
Page 12 of 39 WIM-TD-002_C
PTO ASSEMBLY
“SP”Style Ball Bearing Assembly available to fit 11”- 14”
14” PTO Shown
Item
Description
Item
Description
1
Nut
10
Bearing
2
Washer
11
Clutch Key
3
Clutch Pack
12
Shaft
4
Driving Ring
13
Output Key
5
HHCS
14
Cap
6
Bearing Retainer
15
Grease zerk
7
Hand Lever Assembly
16
Yoke Assembly
8
Bellhouse
17
Key Woodruff
9
Nameplate
18
Operating Shaft
Page 13 of 39 WIM-TD-002_C
“SP”Style Ball Bearing Assembly available to fit 11”- 14”
“SP” Style
The “SP” style sliding assembly utilizes a sealed ball bearing design. Friction disc sizes range from 11” to
14” with our 1 plate, 2 plate or 3 plate options. WPT PTOs meet the mounting requirements of SAE J617
and SAE J620.
Page 14 of 39 WIM-TD-002_C
3.0 Installation
Caution
Follow safety guidelines utilizing lockout tagout
procedures before and during all installation and
maintenance procedures.
Warning
Ensure that proper rated lifting devices & procedures are
followed when installing, working or maintaining unit.
Failure to do so may result in equipment damage,
personal injury and even death.
Caution
Proper alignment is necessary to ensure that the friction
discs track properly. Improper alignment will result in
poor function and reduced service life.
Warning
Use only the proper quantity and grade of fasteners
shown in the drawings. Failure to do so may result
in fastener failure and/or a reduction in unit torque.
Page 15 of 39 WIM-TD-002_C
3.1.0 REQUIREMENTS FOR PROPER OPERATION AND SERVICE LIFE
3.1.1 Preparation. Upon receipt of your WPT product, inspect for and report any evidence of
damage. To avoid damage or personal injury, ensure that adequate lifting devices and hand
tools are available. Compare the flywheel, flywheel housing to the bell housing, drive ring
respectively to ensure that you have the correct size unit.
3.1.2 Check flywheel and flywheel housing alignment. It is strongly recommended that dial indicator
checks be made prior to installation of the PTO, especially on new engines or when a previous PTO
failure might indicate an alignment problem.
3.1.3 Flywheel to housing face run out inspection.
Mount the indicator base on the face of the flywheel and position the dial indicator tip
perpendicular to the flywheel housing mounting face. Rotate the flywheel 360 degrees while
applying force to the crankshaft thrust bearing. The total indicator reading should not exceed
the values listed in the table shown below in Section 3.1.4.
3.1.4 Check flywheel housing bore runout. 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 of the flywheel
housing. Rotate the flywheel through 360 degrees.
The total indicator reading should not exceed:
SAE “00” Housing: 0.019 inches (0.483 mm)
SAE ”0” Housing: 0.016 inches (0.406 mm)
SAE ”1” Housing: 0.012 inches (0.305 mm)
SAE ”2” Housing: 0.011 inches (0.279 mm)
SAE ”3” Housing: 0.010 inches (0.254 mm)
SAE ”4” Housing: 0.009 inches (0.229 mm)
SAE ”5” Housing: 0.008 inches (0.203 mm)
SAE ”6” Housing: 0.007 inches (0.178 mm)
(Reference: SAE J617 table 1A)
Page 16 of 39 WIM-TD-002_C
3.1.5 Check flywheel face runout.
Mount the indicator base on the flywheel housing and position the dial indicator tip so that its
movement is perpendicular to the face of the flywheel. Position the indicator tip near the drive
ring mounting bolt circle diameter. Rotate the flywheel 360 degrees applying force to the
crankshaft thrust bearing.
The total indicator reading should not exceed 0.0005 inches (0.013 mm) per inch of measured
diameter.
3.1.6 Check engine crankshaft endplay.
Measure and document the engine’s crankshaft endplay before installing PTO. Using dial
indicator as shown in 3.1.5 force the crankshaft back against the rear main bearing and then force
the crankshaft to the front of the engine. Record the total movement as shown by the dial
indicator.
3.1.7 Check engine radial play.
Apply upward radial force by using a prybar to check the radial play in flywheel. Consult engine
manufactures specifications to ensure correct tolerance.
3.1.8 Check flywheel pilot bore runout.
Mount the indicator base on the flywheel housing and position the dial indicator tip so its
movement is perpendicular to the pilot bore diameter, to measure pilot bore runout. Rotate the
flywheel through 360 degrees.
The total indicator reading should not exceed 0.005 inches (0.127 mm).
Page 17 of 39 WIM-TD-002_C
3.2.0 OUTBOARD SUPPORT (if required)
3.2.1 Refer to Table 1 for the necessity of using an outboard support.
OUTBOARD SUPPORT REQUIREMENT
SIDELOAD APPLICATIONS
IN-LINE
C106
Not Required
Not Required
C107
Not Required
Not Required
C108
Not Required
Not Required
C110
Not Required
Not Required
SP111
Not Required
Not Required
SP211
Not Required
Not Required
SP311
Required
Recommended
SP114
Not Required
Not Required
SP214
Required
Recommended
SP314
Required
Recommended
Table 1
3.2.2 When installing a support bracket, ensure the PTO maintains proper alignment throughout the
flywheel, bellhousing & shaft. A dial indicator may be used to verify the PTO is not moving or
deflecting during the installation process (see section 3.1). Shim and adjust the support as needed.
NOTE: the outboard support should complement the position of the PTO, not change it.
WARNING:
Adhere to Table 1 regarding the necessity of an outboard support. The outboard support should not restrict flexure
of the engine mounts. Failure to provide adequate support can result in personal injury and/or damage to the PTO.
3.2.3 See Figure 1 for Outboard support examples.
Figure 1
3.2.4 Models may vary, refer to assembly drawing for mounting requirements. Apply torque to outboard
support hardware in accordance with TABLE 7.
3.2.5 PTO deflection due to loads imposed by application should not exceed 0.010 in [0.254 mm].
deflection should be measured at the support plate pilot with dial indicator base mounted on a
rigid part of the engine. (see section 3.1)
Page 18 of 39 WIM-TD-002_C
3.3.0 INSTALLATION OF DRIVING RING
3.3.1 Use the drive ring provided with the PTO or remove the drive ring from the engine flywheel to use
as an alignment gauge. Place the drive ring over the friction discs. Center the drive ring relative to
the outer diameter of the clutch body
3.3.2 Engage the clutch by operating the hand lever. Remove the drive ring. Do not disengage clutch until
installation is complete.
3.3.3 Mount driving ring (see sections 3.1 for proper alignment) on the engine flywheel, making sure it is
seated properly.
3.3.4 Use SAE Grade 5 bolts (or equivalent) with lock washers and torque to the value in TABLE 7. Use the
engine manufacturer's torque recommendation if different from that in TABLE 7.
Use the engine manufacturer's torque recommendation if different from that in TABLE 7.
3.4.0 INSTALLING THE UNIT
NOTE: For additional information see our installation video:
www.wptpower.com/support/installation-assembly-videos/
3.4.1 Prior to installation, grease the main shaft bearings, sliding sleeve assembly, and operating shaft.
Apply grease to each fitting until grease just appears at the respective seal surfaces. Although the
PTO is normally lubricated at the factory, this step will ensure that all moving parts are properly
lubricated for initial use. (See Table 6)
3.4.2 Remove inspection cover nameplate from the PTO bellhousing and slowly draw the PTO toward the
engine; this can be done by installing 3 or 4 equally spaced lengths of all-thread rod into the
flywheel housing. Install nuts and tighten these while supporting the weight of the PTO with a hoist
or cribbing.
3.4.3 As the PTO is drawn toward the engine, ensure that friction discs engage the teeth on the drive ring
without binding or interference.
3.4.4 When the PTO is fully in place, remove the studs if used and replace with SAE Grade 5 bolts (or
equivalent) with lock washers and torque to the value in TABLE 7. Use the engine manufacturer's
torque recommendation if different from that in TABLE 7.
3.4.5 The operating handle (hand lever) may be installed on either side of the PTO engagement shaft,
depending upon space requirements and convenience to the operator. Install lever with the cast
hex facing away from the PTO. Engage clutch, remove handle and reinstall, align the splines so the
handle positions is slightly over center, while engaged. See illustrations below.
Figure 2
Page 19 of 39 WIM-TD-002_C
3.4.6 The pilotless PTO does not have critical endplay requirement, nor is there a requirement for
adjustment.
CAUTION:
Operating handle must be mounted in the vertical position, just over center in engagement direction, to eliminate
excessive wear in the collar, See illustrations in Figure 2.
3.4.7 When installing PTO with operating shaft vertical, a stop collar should be added to the shaft on the
topside for support. Failure to add stop collar will cause premature failure to the sliding sleeve
collar assembly.
Figure 3
3.4.8 Support plate is required for SP311/214/314 side load applications and recommended for in-line
applications. (See Section 3.2.1)
3.4.9 Automatic or Remote Engagement of the PTO.
3.4.9.1 This PTO design may be actuated by applying a force with a remote actuator to the
handle of the PTO. There are many acceptable methods, such as Hydraulic Cylinder,
Pneumatic Cylinder, or Linear actuator.
3.4.9.2 The actuator must be oriented such that the normal direction of the force remains
tangent to the Arc of Engagement.
3.4.9.3 Size of actuator is critical. The actuator must be of sufficient size to apply the required
amount of force on the handle. Too much force can cause permanent deformation of
the Sliding Sleeve Assembly. Too little force will cause excess slippage, damage to the
clutch and will eventually damage the Sliding Sleeve Assembly.
CAUTION:
Actuator force must be released once PTO is engaged or sliding sleevefailure will result.
3.4.9.4 The actuator’s end position must be adjustable to allow the connection with the PTO
handle to be appropriately positioned. When adjustments are made to the Clutch, it is
required to test, check, and correct actuators rod length to assure proper stroke length.
The connection between the PTO Handle and Actuator must float freely after
engagement, and after disengagement of the PTO. Short life of the Sliding Sleeve
Assembly will result if slack between the handle and actuator is not maintained.
3.4.9.5 The actuators travel must be within appropriate limits to engage and disengage the PTO.
Failure to adhere to this rule will cause failure and likely breakage of the PTO’s Clutch.
3.4.9.6 See Table 2 to determine appropriate force and stroke requirements.
Page 20 of 39 WIM-TD-002_C
WARNING:
The WPT mechanical PTO is capable of side load and inline power transmission applications. Special care should
be exercised when installing the PTO in an inline application. Due to engine movement and other factors that may
cause misalignment, WPT recommends that a flexible coupling or drive shaft be used to join the PTO and driven
shaft. If a coupling is used, ensure that it has sufficient horsepower capacity and that shafts are in line within the
limits specified by the coupling manufacturer. If you are unsure about the procedure to align these shafts, consult
the coupling manufacturer or WPT Power.
3.5.0 CLUTCH ADJUSTMENT
The WPT mechanical PTO uses an adjusting collar to adjust for clutch wear. If the engagement force
reaches 2/3 of maximum specified torque, clutch slips, heats excessively, or operating lever fails to
stay engaged, clutch adjustment is required.
3.5.1 Remove inspection cover nameplate.
3.5.2 Disengage adjustment pin for “C” style clutches, pull pin out. For “SP” style clutches,
disengage adjustment pin by pushing pin in with a screwdriver.
“C” Figure 4 “SP”
3.5.3 Rotate adjusting ring clockwise to increase clutch engagement force. For “C” style pull pin and
rotate shaded assembly. For “SP” style push pin in and rotate ring.
“C” STYLE
Figure 5
“SP” STYLE
3.5.4 Adjust clutch engagement force until the hand lever force required to engage the clutch is
within the range specified on the inspection cover nameplate or Table 2 in this section.
3.5.5 Check engagement force with a torque wrench using the cast hex on the lever or check hand
lever engagement force using spring scale at hand lever length “A” shown in of Figure 6 &
Table 2
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