Wichita Clutch Mechanical Power Take-Offs User Manual

Power Take-Off Clutches

Superior Torque Control for Heavy Duty Diesel Engines

Wichita has instituted quality assurance pro ce dures aimed at achieving the ultimate in product reliability
and its Power Take-Offs rep re sent industry’s most ad vanced PTO design.

Two mechanically activated PTO’s are now available in addition to the per for mance-proven Air Tube
Disc Clutch PTO’s. Com plete clutch engagement of the me chan i cal PTO units is assured with each
release of the hand lever due to the incorporation of a heavy-duty Fuller
many out stand ing fea tures, the Fuller clutch used in the Wichita PTO pre vents torsional vibration from
dam ag ing engine or trans mission com po nents, or causing spline wear. The result is superior Power
Take-Off per for mance and durability!

®

“Solo” truck clutch. With its

Mechanical Power
Take-Off Clutches

In-Line PTO

2 sizes

Side Load PTO

2 heavy
duty models

Typical Applications

The In-line PTO design pro vides
direct drive operation with side load
ca pa bil i ty. It has an automatic self­ad just ing feature and does not require
a pilot bearing. Other features such
as standard SAE flywheel mount ing,
interchangeable clutch and clutch
hous ing, constant plate load and easy
main te nance add up to superior
performance.

Side Load PTO’s utilize a pair of
heavy-duty roller bearings fitted in to
the shaft housing. The bearing support
system eliminates the trans mis sion of
side loads that could reduce du ra bil i ty
or even damage the engine’s crank ­shaft. Its torque capacities range up to
420 HP @ 2100 RPM.

Wichita 15-1/2" mechanical PTO provides long
service life for Cummins 855 diesel on rock crusher.

P-1100-WC 1/12

Air-Tube Disc
Power Take-Off
(PTO) Clutches

3 sizes

Wichita mechanical PTO handles shock
and heavy loads for wood chippers.

F

Air-Tube Disc Power Take-Off
Clutch es provide dependable trouble­free per for mance on indirect drives
with large over hung loads on engines
of 250-700 HP. The Wichita design
isolates the side load from the engine’s
crankshaft for long service life. Simple
air controls can be utilized to re mote ly
control the clutch as well as the
throttle. Wichita PTO’s have been suc ­cess ful ly used for oil field, con struc tion
and marine ap pli ca tions.

Wichita PTO mounted on Caterpillar diesel engine.

Wichita Clutch 800-964-3262 145

Power Take-Off Clutches

Mechanical Design

In-Line

Available with
dampened
driven discs

No pilot bearing
required

Adjustment free
feature
automatically
adjusts clutch
through
normal use

Low hand lever effort.
30 lbs. vs. 100 lbs. for
over-center type PTO. Lever
can be mounted on either side

Ideal for
vehicular flywheel
applications

Optional
Support Base

Shaft is supported
by ball bearings,
eliminating transmission
of damaging side loads.

Design Features

• Side Load version incorporates a rugged
cylindrical roller bearing system which
eliminates trouble-prone pilot bear
Provides 100% external support of take-off
shaft. Prevents trans mis sion of side loads
that fatigue or even damage the engine
crankshaft.

• Precise alignment ca

pa bil i ties of the
bearing system ensure flywheel/clutch
concentricity to min i mize effects of diesel
engine torsional vibration.

ings.

reducing required axial force as the clutch
is disengaged. The discs are raced with
trapezoidal ceramic buttons, and are
dampened with an assembly of coaxial
springs mount ed in the disc hub.

• Dampened clutch discs prevent
vibrations

from damaging engine or

torsional

components.

• Available in 2 sizes, from 14" to 15 1/2" for
engines up to 420 HP @ 2100 RPM.

• Performance-proven Fuller Solo Spring
clutch provides easy engagement. Axial
load is provided by three pairs of springs
placed at an angle to the clutch

centerline,

146 Wichita Clutch 800-964-3262

P-1100-WC 1/12

Power Take-Off Clutches

Mechanical In-line PTO (Truck Flywheel)

Size 14" Flat, 14" Pot & 15-1/2" Flat

Dimensions: inches

A
Clutch SAE Bell Pilot BC E
Size Housing (+.000/-.002) in. Hole Circle Plate Dia. D Hole Size – Qty F

14" Flat 1 16.50* 15.500 13.56 N/A 13/32 8 2.62
14" Pot 1 14.750 15.500 13.75 2.94 13/32 8 2.50
15-1/2" Flat 1 17.155 16.625 15.22 0.19 15/32 8 2.50

* Nominal diameter only, clutch is not piloted.

Caution: Do not use with Drive Line

Center of gravity is 242 lbs. located 3.50” from bell housing mounting surface

Estimated Side Load Calculation

#1 L=

#2 L=

L= Actual Applied Load (lbs. for #1 and kgs for #2)
N= Shaft Speed (RPM)
D= Pitch Diameter (in. for #1 and mm for #2) of Sheave

F= Load Factor

SF = Service Factor

126,000 x HP

N x D

1,945,000 x kW

N x D

1.0 for Chain Drive or Gear Drive

1.5 for Timing Belts

2.5 for All V-belts

3.5 for All Flat Belts

2.1 for Reciprocating Compressors and other severe shock drives

1.8 for Large Inertia Drives such as Crushers, Chippers, and Planers

x F x SF

x F x SF

Allowable Side Load (lbs.) at
1,800 RPM

X Side Load

Distance from (lbs.) B

Bell Housing Bearing LIfe

3.62 1,600

4.62 1,100

5.62 850

6.62 680

7.62 565

8.62 450

9.62 400

10.26 370

11.25 340

At 2,100 RPM, derate side load by 20%.

10

F

Note: It is recommended that the optional support plate be used in side load applications.

P-1100-WC 1/12

Wichita Clutch 800-964-3262 147

Power Take-Off Clutches

Mechanical Side Load PTO (Truck Flywheel)

Size 15-1/2" Flat

Clutch Engine Manufacturers
Size Common Truck Flywheels*

Caterpiller Cummins Detroit

14" Pot FW1101

15-1/2" Flat

* Check with engine manufacturer for flywheel compatibility.

9N3136

4W6800

FW1134 5138863

5129650
5101878

Engine Flywheel Housing SAE Standards

SAE Bolt Circle Tapped

Size A B C D Holes

No. in. in. in. in. No. Size

00 31.000/31.010 34-3/4 33-1/2 3-15/16 16 1/2-13
0 25.500/25.510 28 26-3/4 3-15/16 16 1/2-13
1/2 23.000/23.008 25-1/2 24-3/8 3-15/16 12 1/2-13
1 20.125/20.130 21-3/4 20-7/8 3-15/16 12 7/16-14
2 17.625/17.630 19-1/4 18-3/8 3-15/16 12 3/8-16
3 16.125/16.130 17-3/4 16-7/8 3-15/16 12 3/8-16
4 14.250/14.255 15-7/8 15 3-15/16 12 3/8-16
5 12.375/12.380 14 13-1/8 2-13/16 8 3/8-16
6 10.500/10.505 12-1/8 11-1/4 2-13/16 8 3/8-16

For flywheel standards consult the SAE standards manual.

Note: For mounting, use socket head capscrews conforming to the ASTM-574-97a.

Support plate must be perpendicular to side load pull.

Allowable Side Load (lbs.)

X RPM

Dimension 1000 1200 1800 2200 2400

11 in. 11,100 10,700 9,500 8,900 8,200
12 in. 10,000 9,500 8,500 8,000 7,400
13 in. 9,000 8,600 7,600 7,200 6,600
14 in. 8,200 7,800 7,000 6,500 6,100
15 in. 7,500 7,000 6,300 6,000 5,600
16 in. 7,000 6,600 5,800 5,500 5,300
17 in. 6,400 6,100 5,400 5,100 4,800
18 in. 6,000 5,700 5,000 4,700 4,400
19 in. 5,600 5,300 4,700 4,400 4,200
20 in. 5,400 5,200 4,500 4,200 4,000

148 Wichita Clutch 800-964-3262

P-1100-WC 1/12

Power Take-Off Clutches

Specifications

Flywheel Spline Dia. Duty A to B

Torque* Bore and Number Light and Heavy and Max. Max.
Clutch lb.in. Opening of Splines Normal Extra Heavy Speed Slip
Size (Nm) in.(cm) in. - qty HP/100 RPM HP/100 RPM RPM Sec.

14" Flat 10,800 7
(109504-10) Solo (1,220) (17.8)

3

14" Pot
(108050-59) EP (1,898) (17.8)

15-1/2" Flat 19,800 8.5
(109701-74) Solo (2,237) (21.6)

15-1/2" Flat HC** 24,600 10
(109701-25) Solo (2,779) (25.4)

* On C & D duty applications, Clutch Torque must exceed Engine’s Peak torque
** 15-1/2" Flat, high capacity clutch model – available upon request.

16,800 7

2" - 10 17 13 2100 3

2" - 10 27 20 2100 3

2" - 10 32 20 2100 3

2" - 10 39 20 2100 3

1

Duty C to D

Power Take Off Chart

PTO Flywheel SAE Parts List Drawing
Clutch Type Type Bell Housing Number Number Weight

14" Flat Truck† Inline 1 Available Consult Factory
14" Flat Truck† Inline 2 6-714-299-210-0 6-714-202-915-9
14" Flat Truck† Side Load 1 6-714-299-211-0 6-714-202-916-9
14" Flat Truck† Side Load 2 6-714-299-209-0 6-714-202-914-9
14" Pot Truck† Inline 1 6-714-299-104-0 6-714-200-911-9
14" Pot Truck† Inline 2 6-714-299-105-0 6-714-200-910-9
15-1/2" Flat Truck† Inline 1 6-715-299-206-0 6-715-202-909-9 242 lbs.
15-1/2" Flat Truck† Inline 1 6-715-299-232-0 6-715-299-232-9
15-1/2" Flat Truck† Inline 2 6-715-299-207-0 6-715-202-910-9
15-1/2" Flat HC Truck† Inline 1 6-715-299-229-0 6-715-202-909-9
15-1/2" Flat Truck† Side Load 1 6-715-299-208-0 6-715-202-912-9
15-1/2" Flat 14" Industrial Inline 1 6-715-299-209-0 6-715-202-913-9 340 lbs.
15-1/2" Flat 14" Industrial Side Load 1 6-715-299-221-0 6-715-202-918-9
15-1/2" Flat 18" Industrial Side Load 0 See

† Alternately referred to as a “Vehicular” flywheel.

2

Consult Factory

1

Conversion Kits Flywheels SAE Bell Housing

8-560-320-017-0 15-1/2" Truck to 14" Industrial 1 to 1
8-560-320-073-1 15-1/2" Truck to 18" Industrial 1 to 0

Mechanical Side Load PTO

HP Rating based on side load using 12-1/2 P.D.,
8-8V groove sheave at max. SF.

Speed Bearing Carrier Clutch Only

1,800 200 HP 360 HP
2,100 225 HP 420 HP

1

See chart “A”, on page 123.

2

15-1/2" Flat, Side Load PTO uses conversion kit 8-560-320-073-1.

3

Old style flywheel, often not available on new engines.

See Engine manufacturer for flywheel availability.

P-1100-WC • 1/11

Estimated Side Load Calculation

#1 L=

#2 L=

126,000 x HP

N x D

1,945,000 x kW

N x D

L= Actual Applied Load (lbs. for #1

and kgs for #2)
N= Shaft Speed (RPM)
D= Pitch Diameter (in. for #1

and mm for #2) of Sheave
F= Load Factor

1.0 for Chain Drive or Gear Drive

1.5 for Timing Belts

2.5 for All V-belts

3.5 for All Flat Belts

SF = Service Factor

2.1 for Reciprocating Compressors

and other severe shock drives

1.8 for Large Inertia Drives such as

Crushers, Chippers, and Planers

x F x SF

x F x SF

Wichita Clutch 800-964-3262 149

F

F

Power Take-Off Clutches

Selection Example:

To properly select a Power Take Off (PTO), the following
information is needed:

1. Power transmission type: Inline or Side Load

2. Application engine horsepower @ speed

3. Peak engine torque

4. SAE bell housing size

5. New engine installation or retrofit to an existing engine

6. Duty selection: See chart “A”, page 123
Chart “A” gives application requirements ranging from “Light” to
“Normal” duties (A to B) and “Heavy” to “Extra Heavy” duties (C to
D)

7. Inertia of machine/load

8. Pitch diameters of drive and driven sheaves****

9. Width of drive sheave on Power Take Off shaft****

**** Not applicable to inline drives

Machine Requirement:

Machine Required: Mud Pump – Triplex piston type

Installation: New engine installation

Power
Transmission Type: Side load

HP & Speed: 300 HP @ 1,800 RPM

Engine Peak Torque: 1,120 lb.ft.

SAE Bell Housing Size: SAE bell housing 1

PD* Driver
Sheave on PTO: 12.5 in.

PD* Driven
Sheave on Mud Pump: 15.0 in.

Width of Driver
Sheave on PTO: 9-3/8 in. (8 grooves –

WR2– Inertia of Pump: 108 lb.ft.

* PD is Pitch Diameter of sheave/pulley.
** See manufacturer for sheave details.

8V section Belt Sheave**)

2

Calculations:

1. Application Torque = HP x 63,000/RPM = lb.in.

300 x 63,000/1,800 = 10,500 lb.in.

2. Engine Peak Torque = lb. ft. x 12 = lb.in.

1,120 x 12 =13,440 lb.in.

3. Mud Pump’s Speed =

Engine Speed x P.D. of PTO’s sheave

P.D. of Mud Pump’s sheave

1,800 x 12.5/15 = 1,500 RPM

4. Reflect Pump’s inertia up to PTO’s shaft =

Pump’s Inertia x

1,500

108 x

( )

1,800

5. PTO’s clutch slip time, (sec.) =

6. Estimate Side Load, (lbs.) =

Engines Speed x PTO’s sheave PD

Pump’s speed

( )

PTO’s speed

2

= 75 lb.ft.2@ 1,800 RPM

WR

25.6 x Application Torque

75 x 1,800

=

25.6 x 10,500

HP x 378,000

300 x 378,000
1,800 x 12-1/2

150 Wichita Clutch 800-964-3262

= RPM

2

= lb.ft.

2

x PTO’s speed

= 5,040 lbs.

2

= 1/2 sec.

How to Select:

Part 1. PTO Clutch Calculation Follows:

1. Select clutch duty from field of application =
Reference chart “A”, page 123, Petroleum production shows
Mud Pump under duty “D”

2. Determine required HP/100 RPM duty capacity =
Application torque/630 = HP/100 RPM
10,500/630 = 16-2/3 HP/100 RPM

3. Select clutches based on duty =
On clutch capacity chart, page 149,
shows the following clutches have sufficient capacity.
14" Pot, 15-1/2" Flat & 15-1/2" Flat HC
a.) This is a new engine installation and Note 3 states that there may
be an availability problem with the 14" Pot style clutch.
b.) There is not an advantage in capacity to warrant the use of the
15-1/2" Flat HC style clutch. Therefore, preliminary selection of the
clutch is the 15-1/2" Flat style clutch.

4. Peak torque verses clutch torque =
On “C” and “D” duty applications, it is required that the clutch torque
is greater than engine’s peak torque.
15-1/2" Flat clutch torque from clutch specifications chart on page
149 is 19,800 lb. in.
Engine’s peak torque is 13,440 lb.in.
Clutch torque > Engine’s peak torque
19,800 lb.in. > 13,440 lb.in.

5. Speed =
Clutch capacity chart shows that it has a speed limit of 2,100 RPM
which is greater than the required speed of 1,800 RPM.

6. Clutch slip time, (sec.) =
Clutch capacity chart shows maximum clutch slip time as 3 sec.
which is greater than the calculated 1/2 seconds.

Part 2. Side Load Calculation Follows:

Center of sheave’s side pull =

Sheave width/2 = (9-3/8)/2 = 4-11/16 in.

Locate dimension from Bell housing to shaft’s end = 20-15/16 in.

Reference specific PTO drawing
15-1/2" Flat PTO side load, page 148.

Determine “X” distance on PTO =

(Bell hsg. to shaft’s end dim.) - (Center of sheave’s side pull)
(20-15/16) - (4-11/16") = 16-1/4 in.
Round “X” distance to the nearest whole number = 16 in.

Look up side load =

Check side load at PTO’s speed and “X” distance
Page 148, allowable side load.

At “X” distance of 16 in. and 1,800 RPM, chart yields a side load
capacity of 5,800 lbs.

Comparison on side load =

Side load capacity > Required side load
5,800 lbs. > 5,040 lbs.

Final Selection:

15-1/2 in. Flat power take off,
Side load version with SAE "1" Bell Housing

Power take off chart, page 149, lists the associated parts lists and
drawings.

Parts Lists Number = 6-715-299-208-0
Drawing Number = 6-715-202-912-9

P-1100-WC 1/12

Ideal for automatic
controls

Disc design provides
smooth shock-free start­ups

High-speed air tube
not affected by
centrifugal force

No O-rings or
diaphragms to
wear out

Power Take-Off Clutches

Air-Tube Disc Design (Industrial)

Bearing support eliminates
sideload on crankshaft

Design Features

• Disc design provides smooth, shock free

start-ups.

• Air activated-ideal for automatic or

remote controls.

• Bearing support eliminates sideload on

crankshaft.

• High speed air tube not affected by

centrifugal force.

• No O-rings or diaphragms to wear out.

• Dynamically balanced for high speed

operation.

• Models available for all popular diesel

engines. Up to 700 HP capacity.

P-1100-WC 1/12

Typical air control system

A simple air system shows that the actuation of the
clutch as well as the engine throttle can easily be
designed into one system.

Wichita Clutch 800-964-3262 151

F

F

Power Take-Off Clutches

17.5

Air Tube Disc Side Load PTOs

Type A

Type B

Type C

152 Wichita Clutch 800-964-3262

P-1100-WC 1/12

Power Take-Off Clutches

Dimensions and Specifications: inches

E L No. &

Parts Clutch SAE +-.000 +.000 Holes Type of P.D. of
List No. Size No. Type -.005 F G H J K -.002 M No. Keyway Grooves Sheave

6-715-204-302-0 214H 1 B 18.375 17-1/4 1.000 10-13/16 17-17/32 11-25/32 3.625 7-1/4 17/32 8 7/8 X 7/16 — —
6-715-204-303-0 214H 1/2 B 18.375 17-1/4 1.750 10-13/16 17-17/32 11-1/32 3.625 7-1/4 21/32 6 7/8 X 7/16 — —
6-715-204-304-0 214H 0 B 18.375 17-1/4 1.000 10-13/16 17-17/32 11-25/32 3.625 7-1/4 21/32 6 7/8 X 7/16 — —
6-715-204-306-0 214H 1 C 18.375 17-1/4 1.000 10-13/16 23-15/16 11-13/16 2.500 4-5/8 17/32 8 5/8 X 5/16 8-“8V” 12.3
6-718-104-307-0 118 1/2 B 22.498 21-3/8 1.000 10-5/8 17-17/32 11-25/32 3.625 7-1/4 21/32 6 7/8 X 7/16 — —
6-718-104-302-0 118 0 B 22.498 21-3/8 .625 10-13/16 17-17/32 11-25/32 3.625 7-1/4 21/32 6 7/8 X 7/16 — —
6-718-104-306-0 118 0 A 22.498 21-3/8 .625 8-51/64 20-1/2 10-7/64 — — 21/32 6 — 10-“8V” 15.2
6-718-104-304-0 118 0 A 22.498 21-3/8 .625 8-51/64 20-1/2 10-7/64 — — 21/32 6 — 10-“D” 15.2
6-718-104-303-0 118 1/2 A 22.498 21-3/8 1.000 10-5/8 23-15/16 11-25/32 — — 21/32 6 — 16-“8V” 12.5
6-718-104-305-0 118 0 A 22.498 21-3/8 .625 10-13/16 23-15/16 11-25/32 — — 21/32 6 — 16-“8V” 12.5
6-718-104-301-0 118 1/2 A 22.498 21-3/8 1.000 10-5/8 23-15/16 11-25/32 — — 21/32 6 — 20-“5V” 12.5
6-718-204-307-0 218 1/2 B 22.498 21-3/8 1.000 10-5/8 17-17/32 11-25/32 3.625 7-1/4 21/32 6 7/8 X 7/16 — —
6-718-204-308-0 218 0 B 22.498 21-3/8 .625 11-3/16 17-17/32 12-5/32 3.625 7-1/4 21/32 6 7/8 X 7/16 — —
6-718-204-303-0 218 1/2 A 22.498 21-3/8 1.000 10-5/8 23-15/16 11-25/32 — — 21/32 6 — 16-“8V” 12.5
6-718-204-304-0 218 1/2 C 22.498 21-3/8 1.000 10-5/8 23-15/16 11-13/16 2.500 4-5/8 21/32 6 5/8 X 5/16 8-“8V” 12.3
6-718-204-301-0 218 0 A 22.498 21-3/8 .625 10-13/16 23-15/16 11-25/32 — — 21/32 6 — 16-“8V” 12.5
6-718-204-306-0 218 0 C 22.498 21-3/8 .625 10-13/16 23-15/16 11-13/16 2.500 4-5/8 21/32 6 5/8 X 5/16 8-“8V” 12.3
6-718-304-300-0 318 0 B 22.498 21-3/8 .625 12-3/8 17-17/32 13-19/32 3.625 7-1/4 21/32 6 7/8 X 7/16 — —

Note: For standard SAE engine flywheel dimensions see page 142.

Allowable Side Load (lbs.) at 1,800 RPM

Type A

Note: Derate by 20% for 2,100 RPM.

Type B

Note: Derate by 20% for 2,100 RPM.

Type C

Note: Derate by 20% for 2,100 RPM.

Distance X from Load Dis tance X from Load

base mount-in. lb. base mount-in. lb.

0 — 14 8,900
4 5,400 16 7,100
6 6,300 18 6,000
8 7,500 20 5,100

10 9,200 22 4,400
12 12,000 24 4,300

Distance X from side load Dis tance X from Load

base mount-in. lb. base mount-in. lb.

— — 12 4,400

4 11,500 13 4,100
5 9,600 14 3,800
6 8,200 15 3,600
7 7,200 16 3,400
8 6,400 17 3,200
9 5,800 18 3,000

10 5,200 19 2,900
11 4,800 20 2,800

6,500 lb. Max. side load.

Clutch Specification Table

Recommeded Clutch Siip Torque Recommeded Maximum

Maximum PTO lb.in. at 100 PSI PTO HP/100 RPM With

Clutch Model HP/100 RPM .3 CF.* Heavy Duty Friction Disc

214H 18 71,600 23

118 21 64,500 27
218 42 129,000 54

Estimated Side Load Calculation

#1 L=

#2 L=

L=Actual Applied Load (lbs. for #1 and

Kgs for #2)
N=Shaft Speed (RPM)
D=Pitch Diameter (in. for #1 and mm

for #2) of Sheave.

F=Load Factor

1.0 for Chain Drive or Gear Drive

1.5 for Timing Belts

2.5 for All V-belts

3.5 for All Flat Belts

SF = Service Factor

2.1 for Reciprocating

Compressors and other severe

shock drives

1.8 for Large Inertia Drives such as

Crushers, Chippers, and Planers

126,000 x HP

N x D

1,945,000 x kW

N x D

x F x SF

x F x SF

F

F

* Recommend only 25% of rated torque on PTO’s (in.lbs.) - 30% with heavy duty disc.
Note: For mounting, use socket head capscrews conforming to the ASTM-574-97a.

Support plate must be perpendicular to sideload pull.

P-1100-WC 1/12

Wichita Clutch 800-964-3262 153