WPT POWER PTO Manual

WIM-WG-001_E PAGE 1 of 21
AUTOMOTIVE STYLE CLUTCH
MECHANICAL PTO
Installation & Maintenance Manual

WIM-WG-001_E PAGE 2 of 21
Table of Contents
Page No.
1.0 INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.1 WPT Power PTO
1.2 Product identification numbers
1.3 Bill of materials
2.0 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Flywheel housings
2.2 Flywheel
2.3 Maximum RPM and maximum side load
2.4 Flywheel and flywheel housing alignment tolerances
3.0 INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3.1 Preparation
3.2 Flywheel and flywheel housing alignment
3.3 Flywheel housing face run out
3.4 Flywheel housing bore run out
3.5 Flywheel face run out
3.6 Engine crankshaft endplay
4.0 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
4.1 Preparation
4.2 Clutch disc alignment
4.3 Pressure plate installation
4.4 PTO alignment to engine
4.5 Hand hole cover removal
4.6 Attach PTO to engine
4.7 Engagement lever installation
4.8 Clutch adjustment
4.9 Replace hand hole cover
5.0 LUBRICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5.1 Main bearings
5.2 Operating shaft
5.3 Ball stud
5.4 Drawing and parts list reference
6.0 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6.1 Engine speed
6.2 Load
6.3 Clutch engagement
6.4 Bring load up to speed
6.5 Increase engine RPM
7.0 MAINTENANCE. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
7.1 Engage clutch
7.2 Hand hole cover removal
7.3 Check clearance
7.4 Clutch adjustment
7.5 Recheck clearance
7.6 Replace hand hole cover

WIM-WG-001_E PAGE 3 of 21
Table of Contents
Page No.
8.0 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.1 Remove PTO from engine
8.2 Remove clutch from flywheel
8.3 Remove shaft from PTO housing
9.0 ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
9.1 Install shaft into PTO housing
9.2 Install clutch disc and pressure late
9.3 Attach PTO to engine
10.0 CHART 1: BOLT TORQUE VALUES . . . . . . . . . . . . . . . . . . . . . . . . . .10
11.0 11” PTO DRAWING AND PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . .11
12.0 13” PTO DRAWING AND PARTS LIST . . . . . . . . . . . . . . . . . . . . . . . .13
13.0 11” GM®STYLE PTO DRAWING AND PARTS LIST . . . . . . . . . . . . .15
14.0 11” GM®Style High Sideload PTO Drawing and Parts List . . . . . . .17
15.0 11” GM®STYLE PTO Alignment Tool and Spacer Details . . . . . . . .19

WIM-WG-001_E PAGE 4 of 21
1.0 INTRODUCTION
1.1 The WPT Power PTO is the most rugged PTO available on the market today. Follow the procedures
detailed in this Installation and Maintenance Manual for years of service.
1.2 When ordering parts, use the part number from the Bill of Materials supplied with this unit. Also, please
include the part number and the serial number from the unit itself. These will be found on the metal
hand hole cover on the bellhousing. Your WPT Power Distributor can provide a copy of the Bill of
Materials if the one provided should become lost.
1.3 When performing installation and maintenance functions, refer to the drawings at the back of this
manual, pages 11 thru 13. The references on the drawing 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.
2.0 SPECIFICATIONS
2.1 Flywheel housings compliant with SAE No. 3, No. 4, GM®style or JEEP®style.
2.2 Flywheels compliant with SAE J618 single plate spring loaded clutches.
2.3 Refer to the assembly drawing supplied with this unit for maximum RPM and side load. Your WPT
Distributor can provide a copy of the drawing if the one provided should become lost.
2.4 Flywheel and flywheel housing alignment tolerances see Section 3.0.
2.5 Refer to Chart 1 on page 10 for recommended bolt torque values.
3.0 INSPECTION
3.1 Preparation. Upon receipt of your WPT Power product, inspect for and report any evidence of
damage. To avoid damage or personal injury, insure that adequate lifting devices and hand tools are
available. Compare the flywheel and flywheel housing to the bell housing, clutch disc and pressure
plate, respectively to ensure that you have the correct size unit.
3.2 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.
3.3 Check flywheel to housing face run out.
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 holding pressure against
the crankshaft thrust bearing. The total indicator reading should not exceed the values listed in the table
shown below in section 3.4 Check flywheel housing bore run out.

WIM-WG-001_E PAGE 5 of 21
3.4 Check flywheel housing bore run out. 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 ”3” Housing: 0.010 inches (0.254 mm)
SAE ”4” Housing: 0.009 inches (0.229 mm)
(Reference: SAE J617 table 1A)
Note: Not applicable for GM®style or JEEP®style housing
3.5 Check flywheel face run out.
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 pressure plate mounting
bolt circle diameter. Rotate the flywheel 360 degrees while holding pressure against the crankshaft
thrust bearing.
The total indicator reading should not exceed 0.0005 inches (0.013 mm) per inch of measured
diameter.
3.6 Check engine crankshaft endplay.
Measure and document the engine’s crankshaft endplay before installing PTO. Using dial indicator as
shown in 3.5 move the crankshaft back against the rear main bearing and then move the crankshaft to
the front of the engine. Record the total movement as shown by the dial indicator.

WIM-WG-001_E PAGE 6 of 21
4.0 INSTALLATION
NOTE: For units with model number WTD-13-130 or WTD-13-133, the factory flywheel offset is set to
standard SAE #3. For alternate offset settings see Section 9.1.
4.1 Clean the friction surface of the flywheel and pressure plate with an appropriate cleaning solvent to
remove any oil and grease.
4.2 Use an alignment tool to center the clutch plate on the flywheel, if necessary. The pressure plate side
of the clutch plate should face out.
NOTE: For the PTO’s with model number WTD-11-143 or WTD-11-144, see Section 14 for complete
alignment tool details.
4.3 Place the pressure plate and clutch plate in position on the flywheel and assemble using grade 8
bolts. Make sure alignment tool is in place, and then tighten the bolts evenly in an alternating pattern.
Torque bolts to the specifications in Chart 1 on page 10 or to the engine manufacturer’s torque. Use
the engine manufacturer's torque recommendation if different from that in Chart 1. The alignment tool
can now be removed.
CAUTION:
The PTO is heavy. Use approved lifting equipment and procedures to prevent accident or injury.
4.4 Insert guide pins into the engine flange face 180apart in order to properly align the PTO bellhousing
and shaft with the engine.
4.5 Remove inspection hand hole cover from the PTO bellhousing. Align the PTO bellhousing and
shaft parallel with the engine crankshaft.
4.6 Advance the PTO bellhousing onto the guide pins carefully. Continue until it is against the engine
flywheel housing. Remove the guide pins and install grade 5 or better hex head cap screws to attach
the bellhousing to the engine. Torque bolts to the specifications in Chart 1 on page 10 or to the engine
manufacturer’s torque. Use the engine manufacturer's torque recommendation if different from that in
Chart 1.
4.7 Place the hand lever on the desired side of the operating shaft. Secure with the appropriate hex head
cap screw. The hand lever should be at a 5to 10angle from vertical toward the engine when the
clutch is completely disengaged, see appropriate drawing at the back of this manual, page 11.
4.8 For initial adjustment of clutch: See adjustment instruction in Section 7.0.
4.9 Replace hand hole cover and attach with screws prior to use.
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.
5.0 LUBRICATION
5.1 The throw-out bearing and main bearings are sealed for life and require no lubrication except WTD-
11-143 & WTD-11-144 units pack using EP-2 Lithium based grease or equal every 300 hours.
However, they should be inspected every two years for wear or damage.
5.2 Apply one shot of grease every 100 hours of use to all fittings on the operating shaft. Use a good
quality lithium-based grease (300F minimum drop point, No. 2 NGLI).

WIM-WG-001_E PAGE 7 of 21
5.3 During adjustment, apply a small amount of grease to the ball stud to prevent wear and corrosion.
5.4 Please refer to pages in the back of this manual for a drawing and parts list for this PTO.
6.0 OPERATION
WARNING:If the hand lever has no free play present before the clutch is engaged, adjust, as necessary.
See clutch adjustment, Section 7.0.
6.1 Start the engine and idle at low speed (1000 rpm or less).
6.2 Machinery to be driven should be under no load.
6.3 Use one single swift movement of the hand lever to engage the clutch. Do not allow the clutch to slip
for longer than 2 seconds without either completely engaging it or completely disengaging it.
6.4 If the load to be driven has a large inertia to overcome, the clutch may need to be slipped several times
(a.k.a. “bumping-in”) to bring the driven load up to speed. After 3 to 4 slips, engage the hand lever fully.
6.5 Once the load is turning with the clutch fully engaged, the engine RPM may be increased.
WARNING:Engagement at engine speeds above 1000 rpm will reduce clutch life and may cause damage to
driven machinery.
7.0 MAINTENANCE
WARNING:In order for the clutch release bearing to not contact the release fingers when the clutch is fully
engaged, the clutch should be adjusted periodically.
CAUTION:Turn off engine and prevent from being restarted while adjustments are being performed.
7.1 Fully engage the clutch.
7.2 Remove hand hole cover.
7.3 Check the clearance between the clutch release fingers and the throw-out bearing surface, as
specified on drawing supplied with this unit. Your WPT distributor can provide a copy of the drawing
if the one provided should become lost.
7.4 Loosen the jam nut and rotate the ball end adjust as needed to obtain the proper clearance.
7.5 Recheck clearance after jam nut has been tightened.
7.6 Replace hand hole cover.

WIM-WG-001_E PAGE 8 of 21
8.0 DISASSEMBLY
(Refer to PTO Illustration on pages 11-19 of this manual)
Use a hoist or other suitable lifting equipment to support the weight of the power take-off. Attach lifting
devices at several places or use cribbing to support the PTO in a horizontal position during removal.
CAUTION:
The PTO is heavy. Use approved lifting equipment and procedures to prevent accident or injury.
8.1 Remove the PTO from the engine.
8.1.1 Remove hand lever and other connections to the PTO.
8.1.2 Remove drive shaft or drive belts from PTO output shaft.
8.1.3 Remove the mounting bolts attaching PTO to flywheel housing, removing those located near
the top last. The PTO should separate from the flywheel housing. If the PTO doesn't separate,
gently pry the flanges apart until the housing is removed from the engine flywheel housing pilot
diameter.
WARNING: Use care when removing the PTO from the engine to avoid damage to grease fittings, shaft
splines, and other components.
8.2 Remove the clutch from the flywheel.
8.2.1 Remove bolts holding the pressure plate and clutch plate to the flywheel.
8.2.2 Remove pressure plate and clutch plate.
8.3 Remove the shaft from the PTO housing.
8.3.1 Place the assembly in a position to have access inside bellhousing.
8.3.2 Remove spring, fork and throw-out bearing sleeve from housing assembly.
8.3.3 Remove engagement cam assembly from bellhousing. Remove bolts and slide
engagement shaft out of bellhousing.
8.3.4 Remove bolts from bearing carrier.
8.3.5 Strike output end of shaft with soft faced hammer or use a suitable bearing press to loosen
shaft, bearings and bearing carrier from PTO bellhousing.
8.3.6 Remove bearing carrier and shaft with bearings from PTO bellhousing.
8.3.7 Remove bearing carrier from shaft and bearings using a suitable bearing press.
8.3.8 Using a suitable bearing press, remove bearings from shaft.

WIM-WG-001_E PAGE 9 of 21
9.0 ASSEMBLY
9.1 Alternate flywheel offset setting for WTD-13-130 & WTD-13-133 only.
9.1.1 Remove return spring from throw-out fork.
9.1.2 Remove throw-out fork from ball end adjusting stud.
9.1.3 Ensure fork stud is out of thrust bearing groove.
NOTE: Ball end socket is engaged on “A” side from factory.
9.1.4 Reverse throw-out fork to engage alternate ball end socket. Ball engaged on “B” side.
Standard SAE flywheel offset setting 2.56” [65.02]
Alternate flywheel offset setting 2.91” [73.91]
9.1.5 Ensure fork stud is inside throw-out bearing groove.
9.1.6 Insert ball end stud into ball socket of throw-out fork on “B” side.
9.1.7 Secure return spring to throw-out fork.
9.1.8 Check clearance and adjust as needed see Section 7.0.
9.2 Assembly of the unit
9.2.1 Install shaft into PTO bellhousing by reversing steps found in Section 8.3.
9.2.2 Install clutch plate and pressure plate to flywheel following instructions 4.1 thru 4.3.
9.2.3 Install shaft and housing assembly following instructions 4.4thru 4.7.
9.2.4 Adjust clutch as indicated in instructions 7.0 MAINTENANCE.

WIM-WG-001_E PAGE 10 of 21
10.0 CHART 1
TORQUE VALUES FOR HEX HEAD CAP SCREWS (HHCS)
HEX HEAD CAP SCREWS - Grade 8
BOLT SIZE
As Received
Lubricated**
IN INCHES
LB - FT
LB - IN
Nm
LB - FT
LB - IN
Nm
1/4 -20
8
100
11
6
80
9
5/16-18
17
200
23
13
160
18
3/8 -16
30
360
41
24
288
32
7/16-14
48
570
64
38
456
51
1/2 -13
83
990
112
66
792
89
9/16-12
107
1285
145
85
1028
116
5/8 -11
143
1714
194
114
1371
155
3/4 -10
256
3070
347
204
2456
277
7/8 -9
417
5000
565
333
4000
452
1 -8
625
7500
847
500
6000
678
1 1/8-7
770
9240
1040
616
7390
835
1 1/4-7
1090
13100
1480
869
10400
1180
1 3/8-6
1430
17200
1940
1140
13700
1550
1 1/2-6
1890
22700
2560
1510
18100
2050
HEX HEAD CAP SCREWS - Grade 5
BOLT SIZE
As Received
Lubricated**
IN INCHES
LB - FT
LB - IN
Nm
LB - FT
LB - IN
Nm
1/4 -20
6
71
8
5
56
6
5/16-18
12
142
16
9
113
12
3/8 -16
22
260
29
17
208
23
7/16-14
34
410
46
27
328
36
1/2 -13
53
636
72
42
508
57
9/16-12
74
890
101
59
712
80
5/8 -11
104
1250
141
83
1000
112
3/4 -10
183
2200
249
146
1760
199
7/8 -9
298
3570
403
238
2856
322
1 -8
440
5280
597
352
4224
477
1 1/8-7
553
6640
750
442
5312
600
1 1/4-7
775
9300
1051
620
7440
840
1 3/8-6
1012
12140
1372
809
9712
1097
1 1/2-6
1350
16200
1831
1080
12960
1464
** NOTE: For Loctite use lubricated values

WIM-WG-001_E PAGE 11 of 21
TORQUE VALUES FOR SOCKET HEAD CAP SCREWS (SHCS)
BOLT SIZE
As Received
Lubricated**
IN INCHES
LB - FT
LB - IN
Nm
LB - FT
LB - IN
Nm
1/4 -20
13
150
17
10
120
13
5/16-18
23
305
34
18
244
27
3/8 -16
45
545
62
36
436
49
7/16-14
70
840
95
56
672
76
1/2 -13
108
1300
147
86
1040
117
9/16-12
155
1860
210
124
1488
168
5/8 -11
211
2530
286
168
2024
228
3/4 -10
367
4400
497
293
3520
397
7/8 -9
583
7000
791
466
5600
632
1 -8
867
10400
1175
693
8320
940
1 1/8-7
1242
14900
1684
993
11920
1347
1 1/4-7
1750
21000
2374
1400
16800
1899
1 3/8-6
2317
27800
3142
1853
22240
2513
1 1/2-6
3042
36500
4125
2433
29200
3300
1 3/4-5
4950
59400
6714
3960
47520
5371
2-4.5
7492
89900
10161
5993
71920
8128
** NOTE: For Loctite use lubricated values

WIM-WG-001_E PAGE 12 of 21
11.0 11” PTO Drawing and Parts List
Jeep Style (WTD-11-148 Shown)

WIM-WG-001_E PAGE 13 of 21
Jeep Style (WTD-11-148 Shown)
#
Description
#
Description
1
ASSEMBLY,CLUTCH PLATE
18
BRG,OUTBOARD
2
ASSEMBLY,PRESSURE PLATE
19
BRG ENDCAP
3
BRG,THRUST
20
SHAFT
4
FORK,THROW-OUT
21
KEY
5
HHCS
22
CAP,GREASE FITTING
6
WASHER,LOCK
23
ZERK
7
BRG CARRIER
24
ENGAGEMENT CAM
8
BRG,INBOARD
25
KEY,WOODRUFF
9
BALL END ADJUST
26
SHAFT,OPERATING
10
HEX NUT
27
SET SCREW
11
SPRING,EXTENSION
28
PLUG,PIPE (not Shown)
12
SCREW,SPRING ANCHOR
29
ACCESS COVER
13
BELLHOUSING
30
DUST COVER
14
ASSEMBLY,LEVER,HAND
31
HHCS
15
NAMEPLATE
32
HHCS
16
HHCS
33
HHCS
17
STUD,THREADED ADJUST
34
ADAPTER, SPEED SENSOR

WIM-WG-001_E PAGE 14 of 21
12.0 13” PTO Drawing and Parts List
13” Flat Face Flywheel (WTD-13-130 shown)

WIM-WG-001_E PAGE 15 of 21
13” Flat Face Flywheel (WTD-13-130 shown)
#
Description
#
Description
1
CLUTCH PLATE
14
STUD,BALL END ADJUST
2
PRESSURE PLATE
15
ASSEMBLY,LEVER,HAND
3
BRG,THRUST
16
BELLHOUSING
4
FORK,THROW-OUT
17
RODENT COVER
5
HHCS
18
HAND HOLE COVER
6
WASHER,LOCK
19
SHCS
7
BRG CARRIER
20
HEX NUT
8
BRG,INBOARD
21
SEAL,OUPUT SHAFT
9
SHAFT
22
CAP,GREASE FITTING
10
KEY,OUTPUT
23
ZERK
11
BRG,OUTBOARD
24
ENGAGEMENT CAM ASSY
12
SPRING,EXTENSION
25
KEY,WOODRUFF
13
SCREW,SPRING ANCHOR
26
SHAFT,OPERATING

WIM-WG-001_E PAGE 16 of 21
13.0 11” GM®Style PTO Drawing and Parts List
GM Style (WTD-11-143 shown)

WIM-WG-001_E PAGE 17 of 21
GM Style (WTD-11-143 shown)
#
Description
#
Description
1
HHCS
15
BELLHOUSING
2
DUST COVER
16
ASSEMBLY,LEVER,HAND
3
ASSEMBLY,CLUTCH PLATE
17
NAMEPLATE
4
ASSEMBLY,PRESSURE PLATE
18
STUD,THREADED ADJUST
5
BRG,THRUST
19
BRG,OUTBOARD
6
FORK,THROW-OUT
20
BRG ENDCAP
7
HHCS
21
SHAFT,AUTOMOTIVE STYLE
8
WASHER,LOCK
22
KEY
9
BRG CARRIER
23
CAP,GREASE FITTING
10
BRG,INBOARD
24
ZERK
11
BALL END ADJUST
25
ENGAGEMENT CAM
12
HEX NUT
26
KEY,WOODRUFF
13
SPRING,EXTENSION
27
SHAFT,OPERATING
14
SCREW,SPRING ANCHOR
28
SET SCREW

WIM-WG-001_E PAGE 18 of 21
14.0 11” GM®Style High Sideload PTO Drawing and Parts List
GM Style (WTD-11-144 shown with Labyrinth Seal)
Note: Add grease during installation to Labyrinth Seal when replacing.

WIM-WG-001_E PAGE 19 of 21
GM Style (WTD-11-144 shown with Labyrinth Seal)
#
Description
#
Description
1
HHCS
16
BELLHOUSING
2
DUST COVER
17
ASSEMBLY,LEVER,HAND
3
ASSEMBLY,CLUTCH PLATE
18
NAMEPLATE
4
ASSEMBLY,PRESSURE PLATE
19
STUD,THREADED ADJUST
5
SEAL,GREASE,LABYRINTH
20
BRG,SPHERICAL ROLLER
6
BRG,THRUST
21
BRG ENDCAP
7
FORK,THROW-OUT
22
SHAFT
8
HHCS
23
KEY
9
WASHER,LOCK
24
CAP,GREASE FITTING
10
BRG CARRIER
25
ZERK
11
BRG,SPHERICAL ROLLER
26
ENGAGEMENT CAM
12
BALL END ADJUST
27
KEY,WOODRUFF
13
HEX NUT
28
SHAFT,OPERATING
14
SPRING,EXTENSION
29
SET SCREW
15
SCREW,SPRING ANCHOR

WIM-WG-001_E PAGE 20 of 21
15.0 11” GM®Style (WTD-11-143 & WTD-11-144) Alignment Tool and Spacer Details
Alignment Tool –Can be purchase at most automotive part stores with the
Doorman part number 14522 or with the Centerforce part number
50028. If unavailable at a local automotive part store, WPT can be
contacted with part number WTD-11-A49.
Flywheel Spacer –Can be made at a local machine shop from mild steel using the
drawing below or call WPT to purchase part number WTD-11-A66.