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com Actuation Solutions and Systems for the World’s Most Challenging Environments
Toll-free: 855 341 3415 info@cowandynamics.com L SERIES – 3000 PSI NFPA Servo Actuator

L SERIES
3000 psi

Prepared to accept a linear displacement transducer

NFPA Hydraulic Cylinder

Bore sizes from 1 1/2” to 6”

Item Description Qty
11 Head – Machined steel 1
11F Head flange – Machined steel 1
12 Cap – Machined steel 1
13 Barrel – Seamless steel tubing honed ID 1
14* Barrel seals – Nitrile O-ring 2
15 Tie rod – Stress proof steel 4
16 Tie rod nut – Grade 5 4
21 Piston – Aluminium 6061-T6 1
22 Piston rod – Steel SAE 1045, hard 1
chromed, ground and polished
23* Piston rod seal – Nitrile O-ring 1
24* Piston packing – Hi-load BZ-PTFE 1
& Nitrile energizer
25* Wear band – BZ-PTFE 2
26 Piston lock – Spring pin 2
31 Gland bushing – Bronze SAE 660 1
32a* Buffer seal – BZ-PTFE & Nitrile energizer 1
32b* Gland packing – Urethane 1
34* Gland seal – Nitrile O-ring 1
35* Gland seal backup – PTFE 1
41* Rod wiper – Steel encased urethane 1
* Denotes the standard replacement repair kit
** High temperature seals available upon request
 3000psi SERVO CYLINDERS

The Series-L- Hydraulic Servo cylinder is designed and manufactured for continuous
duty service in the most demanding applications and industries.
Introduced in 1997, this Cylinder has a proven track record in installations ranging from
aerospace test-rigs to sawmill-mill equipment.
Every cylinder is manufactured to the most exacting tolerances, tested and flushed prior
to it leaving the factory.

Pertinent Features

Piston:
Made from 6061-T6 aluminum to reduce mass and improved acceleration/
deceleration performance.
Extra wide design for optimal guidance and stability under severe side-load
conditions.
Threaded to the piston rod and locked with high-strength adhesive and
mechanically locked with a cross-drilled roll pin.
Final machining of completed piston and rod-assembly for assured concentricity.
Rear-face machined to accept induction magnets for linear transducers.

Piston rod:
Made from hard chromed and ground 1045 steel the rod is gun-drilled to accept
infernally mounted rod-style linear transducers.
Available with three standard thread -styles and a variety of rod diameters to suit
any application.

Gland bushing:
Made from SAE 660 bearing bronze for optimum low-friction/bearing-life
performance. Special three seal design for zero leakage at pressure peaks
up to 5000 psi.
Cartridge design permits easy replacement of seals without special tools.
Optional bushing materials are available for special applications.

Valve mounting pattern:

The cap-end is available with either a universal mounting pattern to accept a
manifold sub plate or, in a single-piece design for specific valve makes and sizes.

Seals:
The low-mass piston incorporates a high-load seal with with a Nitrile energizer
ring and bronze impregnated Teflon wear bands for ultra-low friction and optimal
acceleration/deceleration.
Urethane gland packings, Nitrile gland seals and steel encased rod wipers ensure
trouble free operation in environments with a high degree of particle
contamination.
Standard operating temperature ranges from –40°F to 105°F.
Optional packing and seal configurations and materials are available for special
applications.

Special cylinders:
Servo cylinders up to 26 inch diameter are readily available. Please contact our
engineering department for additional information.
 Add Stroke
Bore E EE F FB G H J K R TF UF
LB P
1½ 2½ SAE8 3/8 7/16 2-1/8 3-3/8 1-1/2 3/8 1.63 3-7/16 4-1/4 6-5/8 4-1/2
2 3 SAE8 5/8 9/16 2-3/8 4 1-1/2 7/16 2.05 4-1/8 5-1/8 6-7/8 4-1/2
2½ 3½ SAE8 5/8 9/16 2-3/8 4-9/16 1-1/2 7/16 2.55 4-5/8 5-5/8 6-7/8 4-1/2
3¼ 4½ SAE12 3/4 11/16 2-3/4 4-1/2 1-3/4 9/16 3.25 5-7/8 7-1/8 7-1/2 4-3/4
4 5 SAE12 7/8 11/16 2-7/8 5 1-3/4 9/16 3.82 6-3/8 7-5/8 7-5/8 4-3/4
5 6½ SAE12 7/8 15/16 2-7/8 6-1/2 1-3/4 13/16 4.95 8-3/16 9-3/4 8-1/8 5-1/4
6 7½ SAE16 1 1-1/16 3-1/4 7-1/2 2-1/4 7/8 5.73 9-7/16 11-1/4 9 5-1/2

Thread (KK)
Bore Rod A B V W Y MAX PSI
IM LF – SM
1 1/2 1 7/8-14 3/4-16* 1-1/8 1.500 1/2 1 2-3/8 1500
1 7/8-14 3/4-16* 1-1/8 1.500 1/4 3/4 2-3/8 2500
2
1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 2-5/8 1500
1 7/8-14 3/4-16 1-1/8 1.500 1/4 3/4 2-3/8 2500
2 1/2 1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 2-5/8 1900
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/2 1-1/4 2-7/8 1500
1-3/8 1-1/4-12 1-14 1-5/8 2.000 1/4 7/8 2-3/4 2500
3 1/4 1-3/4 1-1/2-12 1-1/4-12 2 2.375 3/8 1-1/8 3 2100
2 1-3/4-12 1-1/2-12 2-1/4 2.625 3/8 1-1/4 3-1/8 1500
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/4 1 3 2500
4 2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 3-1/8 1800
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 3-3/8 1500
2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 3-1/8 2200
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 3-3/8 1650
5
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 3/8 1-3/8 3-3/8 1200
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 3/8 1-3/8 3-3/8 750
2-1/2 2-1/4-12 1-7/8-12 3 3.125 1/4 1-1/4 3-1/2 1800
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 1/4 1-1/4 3-1/2 1450
6
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 1/4 1-1/4 3-1/2 1100
4* 3-3/4-12 3-12 4 4.750 1/4 1-1/4 3-1/2 750
*Special request
 Add Stroke
Bore E EE F FB G H J K R TF UF
LB P
1½ 2½ SAE8 3/8 7/16 2-1/8 3-3/8 1-1/2 3/8 1.63 3-7/16 4-1/4 6-5/8 4-1/2
2 3 SAE8 5/8 9/16 2-3/8 4 1-1/2 7/16 2.05 4-1/8 5-1/8 6-7/8 4-1/2
2½ 3½ SAE8 5/8 9/16 2-3/8 4-9/16 1-1/2 7/16 2.55 4-5/8 5-5/8 6-7/8 4-1/2
3¼ 4½ SAE12 3/4 11/16 2-3/4 4-1/2 1-3/4 9/16 3.25 5-7/8 7-1/8 7-1/2 4-3/4
4 5 SAE12 7/8 11/16 2-7/8 5 1-3/4 9/16 3.82 6-3/8 7-5/8 7-5/8 4-3/4
5 6½ SAE12 7/8 15/16 2-7/8 6-1/2 1-3/4 13/16 4.95 8-3/16 9-3/4 8-1/8 5-1/4
6 7½ SAE16 1 1-1/16 3-1/4 7-1/2 2-1/4 7/8 5.73 9-7/16 11-1/4 9 5-1/2

Thread (KK)
Bore Rod A B V W Y
IM LF – SM
1 1/2 1 7/8-14 3/4-16* 1-1/8 1.500 1/2 1 2-3/8
1 7/8-14 3/4-16* 1-1/8 1.500 1/4 3/4 2-3/8
2
1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 2-5/8
1 7/8-14 3/4-16 1-1/8 1.500 1/4 3/4 2-3/8
2 1/2 1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 2-5/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/2 1-1/4 2-7/8
1-3/8 1-1/4-12 1-14 1-5/8 2.000 1/4 7/8 2-3/4
3 1/4 1-3/4 1-1/2-12 1-1/4-12 2 2.375 3/8 1-1/8 3
2 1-3/4-12 1-1/2-12 2-1/4 2.625 3/8 1-1/4 3-1/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/4 1 3
4 2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 3-3/8
2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 3-3/8
5
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 3/8 1-3/8 3-3/8
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 3/8 1-3/8 3-3/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 1/4 1-1/4 3-1/2
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 1/4 1-1/4 3-1/2
6
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 1/4 1-1/4 3-1/2
4* 3-3/4-12 3-12 4 4.750 1/4 1-1/4 3-1/2
*Special request
 Add Stroke
Bore CB CD CW E EE G H J K L LR M MR
LB P XC
1½ 3/4 0.501 1/2 2½ SAE8 2-1/8 3-3/8 1-1/2 3/8 3/4 9/16 1/2 9/16 13-1/8 4-1/2

Find in table
2 1-1/4 0.751 5/8 3 SAE8 2-3/8 4 1-1/2 7/16 1-1/4 1-1/16 3/4 7/8 13-3/8 4-1/2
2½ 1-1/4 0.751 5/8 3½ SAE8 2-3/8 4-9/16 1-1/2 7/16 1-1/4 1-1/16 3/4 7/8 13-3/8 4-1/2

below
3¼ 1-1/2 1.001 3/4 4½ SAE12 2-3/4 4-1/2 1-3/4 9/16 1-1/2 1-1/4 1 1-3/16 14-1/4 4-3/4
4 2 1.376 1 5 SAE12 2-7/8 5 1-3/4 9/16 2-1/8 1-7/8 1-3/8 1-5/8 14-3/8 4-3/4
5 2-1/2 1.751 1-1/4 6½ SAE12 2-7/8 6-1/2 1-3/4 13/16 2-1/4 2-1/16 1-3/4 2-1/8 14-7/8 5-1/4
6 2-1/2 2.001 1-1/4 7½ SAE16 3-1/4 7-1/2 2-1/4 7/8 2-1/2 2-5/16 2 2-3/8 16-1/4 5-1/2

Thread (KK) XC +
Bore Rod A B V W Y
IM LF – SM Stroke
1 1/2 1 7/8-14 3/4-16* 1-1/8 1.500 1/2 1 14-7/8 2-3/8
1 7/8-14 3/4-16* 1-1/8 1.500 1/4 3/4 15-3/8 2-3/8
2
1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 15-5/8 2-5/8
1 7/8-14 3/4-16 1-1/8 1.500 1/4 3/4 15-3/8 2-3/8
2 1/2 1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 15-5/8 2-5/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/2 1-1/4 15-7/8 2-7/8
1-3/8 1-1/4-12 1-14 1-5/8 2.000 1/4 7/8 16-5/8 2-3/4
3 1/4 1-3/4 1-1/2-12 1-1/4-12 2 2.375 3/8 1-1/8 16-7/8 3
2 1-3/4-12 1-1/2-12 2-1/4 2.625 3/8 1-1/4 17 3-1/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/4 1 17-1/2 3
4 2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 17-5/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 17-7/8 3-3/8
2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 18-1/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 18-3/8 3-3/8
5
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 3/8 1-3/8 18-3/8 3-3/8
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 3/8 1-3/8 18-3/8 3-3/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 1/4 1-1/4 20 3-1/2
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 1/4 1-1/4 20 3-1/2
6
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 1/4 1-1/4 20 3-1/2
4* 3-3/4-12 3-12 4 4.750 1/4 1-1/4 20 3-1/2
*Special request
 Add Stroke
Bore E EE F G H J K SB SU SW XS
LB P SS
1½ 2½ SAE8 3/8 2-1/8 3-3/8 1-1/2 3/8 7/16 15/16 3/8 6-5/8 4-1/2 5-1/2

Find in table
2 3 SAE8 5/8 2-3/8 4 1-1/2 7/16 9/16 1-1/4 1/2 6-7/8 4-1/2 5-1/4
2½ 3½ SAE8 5/8 2-3/8 4-9/16 1-1/2 7/16 1-13/16 1-9/16 11/16 6-7/8 4-1/2 4-7/8

below
3¼ 4½ SAE12 3/4 2-3/4 4-1/2 1-3/4 9/16 1-13/16 1-9/16 11/16 7-1/2 4-3/4 5-3/8
4 5 SAE12 7/8 2-7/8 5 1-3/4 9/16 1-1/16 2 7/8 7-5/8 4-3/4 5
5 6½ SAE12 7/8 2-7/8 6-1/2 1-3/4 13/16 1-1/16 2 7/8 8-1/8 5-1/4 5-1/2
6 7½ SAE16 1 3-1/4 7-1/2 2-1/4 7/8 1-5/16 2-1/2 1-1/8 9 5-1/2 5-3/4

Thread (KK)
Bore Rod A B V W XS Y
IM LF – SM
1 1/2 1 7/8-14 3/4-16* 1-1/8 1.500 1/2 1 1-3/4 2-3/8
1 7/8-14 3/4-16* 1-1/8 1.500 1/4 3/4 1-7/8 2-3/8
2
1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 2-1/8 2-5/8
1 7/8-14 3/4-16 1-1/8 1.500 1/4 3/4 2-1/16 2-3/8
2 1/2 1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 2-5/16 2-5/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/2 1-1/4 2-9/16 2-7/8
1-3/8 1-1/4-12 1-14 1-5/8 2.000 1/4 7/8 2-5/16 2-3/4
3 1/4 1-3/4 1-1/2-12 1-1/4-12 2 2.375 3/8 1-1/8 2-9/16 3
2 1-3/4-12 1-1/2-12 2-1/4 2.625 3/8 1-1/4 2-11/16 3-1/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/4 1 2-3/4 3
4 2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 2-7/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 3-1/8 3-3/8
2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 2-7/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 3-1/8 3-3/8
5
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 3/8 1-3/8 3-1/8 3-3/8
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 3/8 1-3/8 3-1/8 3-3/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 1/4 1-1/4 3-3/8 3-1/2
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 1/4 1-1/4 3-3/8 3-1/2
6
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 1/4 1-1/4 3-3/8 3-1/2
4* 3-3/4-12 3-12 4 4.750 1/4 1-1/4 3-3/8 3-1/2
*Special request
 Add Stroke
Bore E EE F G H J K ØTD TL UT XG
LB P
1½ 2½ SAE8 3/8 2-1/8 3-3/8 1-1/2 3/8 1.000 1 4-1/2 6-5/8 4-1/2

Find in table
2 3 SAE8 5/8 2-3/8 4 1-1/2 7/16 1.375 1-3/8 5-3/4 6-7/8 4-1/2
2½ 3½ SAE8 5/8 2-3/8 4-9/16 1-1/2 7/16 1.375 1-3/8 6-1/4 6-7/8 4-1/2

below
3¼ 4½ SAE12 3/4 2-3/4 4-1/2 1-3/4 9/16 1.750 1-3/4 8 7-1/2 4-3/4
4 5 SAE12 7/8 2-7/8 5 1-3/4 9/16 1.750 1-3/4 8-1/2 7-5/8 4-3/4
5 6½ SAE12 7/8 2-7/8 6-1/2 1-3/4 13/16 1.750 1-3/4 10 8-1/8 5-1/4
6 7½ SAE16 1 3-1/4 7-1/2 2-1/4 7/8 2.000 2 11-1/2 9 5-1/2

Thread (KK)
Bore Rod A B V W XG Y
IM LF – SM
1 1/2 1 7/8-14 3/4-16* 1-1/8 1.500 1/2 1 2-1/4 2-3/8
1 7/8-14 3/4-16* 1-1/8 1.500 1/4 3/4 2-1/4 2-3/8
2
1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 2-1/2 2-5/8
1 7/8-14 3/4-16 1-1/8 1.500 1/4 3/4 2-1/4 2-3/8
2 1/2 1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 2-1/2 2-5/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/2 1-1/4 2-3/4 2-7/8
1-3/8 1-1/4-12 1-14 1-5/8 2.000 1/4 7/8 2-5/8 2-3/4
3 1/4 1-3/4 1-1/2-12 1-1/4-12 2 2.375 3/8 1-1/8 2-7/8 3
2 1-3/4-12 1-1/2-12 2-1/4 2.625 3/8 1-1/4 3 3-1/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/4 1 2-7/8 3
4 2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 3 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 3-1/4 3-3/8
2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 3 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 3-1/4 3-3/8
5
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 3/8 1-3/8 3-1/4 3-3/8
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 3/8 1-3/8 3-1/4 3-3/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 1/4 1-1/4 3-3/8 3-1/2
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 1/4 1-1/4 3-3/8 3-1/2
6
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 1/4 1-1/4 3-3/8 3-1/2
4* 3-3/4-12 3-12 4 4.750 1/4 1-1/4 3-3/8 3-1/2
*Special request
 Add Stroke
Bore E EE F G H J K ØTD TL UT
LB P XJ
1½ not available

Find in table
2 3 SAE8 5/8 2-3/8 4 3-1/8 7/16 1.375 1-3/8 5-3/4 6-7/8 4-1/2
2½ 3½ SAE8 5/8 2-3/8 4-9/16 3 7/16 1.375 1-3/8 6-1/4 6-7/8 4-1/2

below
3¼ 4½ SAE12 3/4 2-3/4 4-1/2 3 9/16 1.750 1-3/4 8 7-1/2 4-3/4
4 5 SAE12 7/8 2-7/8 5 2-3/4 9/16 1.750 1-3/4 8-1/2 7-5/8 4-3/4
5 6½ SAE12 7/8 2-7/8 6-1/2 2-3/4 13/16 1.750 1-3/4 10 8-1/8 5-1/4
6 7½ SAE16 1 3-1/4 7-1/2 2-7/8 7/8 2.000 2 11-1/2 9 5-1/2

Thread (KK) XJ +
Bore Rod A B V W Y
IM LF – SM Stroke
1 1/2 1 7/8-14 3/4-16* 1-1/8 1.500 1/2 1 5-1/4 2-3/8
1 7/8-14 3/4-16* 1-1/8 1.500 1/4 3/4 5-1/4 2-3/8
2
1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 5-1/2 2-5/8
1 7/8-14 3/4-16 1-1/8 1.500 1/4 3/4 5-3/8 2-3/8
2 1/2 1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 5-5/8 2-5/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/2 1-1/4 5-7/8 2-7/8
1-3/8 1-1/4-12 1-14 1-5/8 2.000 1/4 7/8 6-1/4 2-3/4
3 1/4 1-3/4 1-1/2-12 1-1/4-12 2 2.375 3/8 1-1/8 6-1/2 3
2 1-3/4-12 1-1/2-12 2-1/4 2.625 3/8 1-1/4 6-5/8 3-1/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/4 1 6-3/4 3
4 2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 6-7/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 7-1/8 3-3/8
2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 7-3/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 7-5/8 3-3/8
5
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 3/8 1-3/8 7-5/8 3-3/8
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 3/8 1-3/8 7-5/8 3-3/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 1/4 1-1/4 8-3/8 3-1/2
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 1/4 1-1/4 8-3/8 3-1/2
6
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 1/4 1-1/4 8-3/8 3-1/2
4* 3-3/4-12 3-12 4 4.750 1/4 1-1/4 8-3/8 3-1/2
*Special request
 Add Stroke
Bore E EE F G H J K ØTD TL UT
LB P XJ
1½ 2½ SAE8 3/8 2-1/8 3-3/8 1-1/2 3/8 1.000 1 4-1/2 6-5/8 4-1/2

Find in table
2 3 SAE8 5/8 2-3/8 4 1-1/2 7/16 1.375 1-3/8 5-3/4 6-7/8 4-1/2
2½ 3½ SAE8 5/8 2-3/8 4-9/16 1-1/2 7/16 1.375 1-3/8 6-1/4 6-7/8 4-1/2

below
3¼ 4½ SAE12 3/4 2-3/4 4-1/2 1-3/4 9/16 1.750 1-3/4 8 7-1/2 4-3/4
4 5 SAE12 7/8 2-7/8 5 1-3/4 9/16 1.750 1-3/4 8-1/2 7-5/8 4-3/4
5 6½ SAE12 7/8 2-7/8 6-1/2 1-3/4 13/16 1.750 1-3/4 10 8-1/8 5-1/4
6 7½ SAE16 1 3-1/4 7-1/2 2-1/4 7/8 2.000 2 11-1/2 9 5-1/2

Thread (KK) XJ +
Bore Rod A B V W Y
IM LF – SM Stroke
1 1/2 1 7/8-14 3/4-16* 1-1/8 1.500 1/2 1 6-7/8 2-3/8
1 7/8-14 3/4-16* 1-1/8 1.500 1/4 3/4 6-7/8 2-3/8
2
1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 7-1/8 2-5/8
1 7/8-14 3/4-16 1-1/8 1.500 1/4 3/4 6-7/8 2-3/8
2 1/2 1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 7-1/8 2-5/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/2 1-1/4 7-3/8 2-7/8
1-3/8 1-1/4-12 1-14 1-5/8 2.000 1/4 7/8 7-1/2 2-3/4
3 1/4 1-3/4 1-1/2-12 1-1/4-12 2 2.375 3/8 1-1/8 7-3/4 3
2 1-3/4-12 1-1/2-12 2-1/4 2.625 3/8 1-1/4 7-7/8 3-1/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/4 1 7-3/4 3
4 2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 7-7/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 8-1/8 3-3/8
2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 8-3/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 8-5/8 3-3/8
5
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 3/8 1-3/8 8-5/8 3-3/8
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 3/8 1-3/8 8-5/8 3-3/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 1/4 1-1/4 9 3-1/2
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 1/4 1-1/4 9 3-1/2
6
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 1/4 1-1/4 9 3-1/2
4* 3-3/4-12 3-12 4 4.750 1/4 1-1/4 9 3-1/2
*Special request
 Add Stroke
Bore BD E EE F G H J K ØTD TL TM UM UW XI
LB P
1½ 1-1/4 2½ SAE8 3/8 2-1/8 3-3/8 1-1/2 3/8 1.000 1 3 5 3 6-5/8 4-1/2

Specified by
2 1-1/2 3 SAE8 5/8 2-3/8 4 1-1/2 7/16 1.375 1-3/8 3-1/2 6-1/4 3-1/2 6-7/8 4-1/2

custoemr
2½ 1-1/2 3½ SAE8 5/8 2-3/8 4-9/16 1-1/2 7/16 1.375 1-3/8 4 6-3/4 4 6-7/8 4-1/2
3¼ 2 4½ SAE12 3/4 2-3/4 4-1/2 1-3/4 9/16 1.750 1-3/4 5 8-1/2 5 7-1/2 4-3/4
4 2 5 SAE12 7/8 2-7/8 5 1-3/4 9/16 1.750 1-3/4 5-1/2 9 5-1/2 7-5/8 4-3/4
5 2 6½ SAE12 7/8 2-7/8 6-1/2 1-3/4 13/16 1.750 1-3/4 7 10-1/2 7 8-1/8 5-1/4
6 3 7½ SAE16 1 3-1/4 7-1/2 2-1/4 7/8 2.000 2 8-1/2 12-1/2 8-1/2 9 5-1/2

Thread (KK)
Bore Rod A B V W Y
IM LF – SM
1 1/2 1 7/8-14 3/4-16* 1-1/8 1.500 1/2 1 2-3/8
1 7/8-14 3/4-16* 1-1/8 1.500 1/4 3/4 2-3/8
2
1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 2-5/8
1 7/8-14 3/4-16 1-1/8 1.500 1/4 3/4 2-3/8
2 1/2 1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 2-5/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/2 1-1/4 2-7/8
1-3/8 1-1/4-12 1-14 1-5/8 2.000 1/4 7/8 2-3/4
3 1/4 1-3/4 1-1/2-12 1-1/4-12 2 2.375 3/8 1-1/8 3
2 1-3/4-12 1-1/2-12 2-1/4 2.625 3/8 1-1/4 3-1/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/4 1 3
4 2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 3-3/8
2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 3-3/8
5
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 3/8 1-3/8 3-3/8
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 3/8 1-3/8 3-3/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 1/4 1-1/4 3-1/2
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 1/4 1-1/4 3-1/2
6
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 1/4 1-1/4 3-1/2
4* 3-3/4-12 3-12 4 4.750 1/4 1-1/4 3-1/2
*Special request
 Add Stroke
Bore BB DD E EE F G H J K R
LB P
1½ 1-3/8 3/8-24 2½ SAE8 3/8 2-1/8 3-3/8 1-1/2 3/8 1.63 6-5/8 4-1/2
2 1-13/16 1/2-20 3 SAE8 5/8 2-3/8 4 1-1/2 7/16 2.05 6-7/8 4-1/2
2½ 1-13/16 1/2-20 3½ SAE8 5/8 2-3/8 4-9/16 1-1/2 7/16 2.55 6-7/8 4-1/2
3¼ 2-5/16 5/8-18 4½ SAE12 3/4 2-3/4 4-1/2 1-3/4 9/16 3.25 7-1/2 4-3/4
4 2-5/16 5/8-18 5 SAE12 7/8 2-7/8 5 1-3/4 9/16 3.82 7-5/8 4-3/4
5 3-3/16 7/8-14 6½ SAE12 7/8 2-7/8 6-1/2 1-3/4 13/16 4.95 8-1/8 5-1/4
6 3-5/8 1-14 7½ SAE16 1 3-1/4 7-1/2 2-1/4 7/8 5.73 9 5-1/2

Thread (KK)
Bore Rod A B V W Y
IM LF – SM
1 1/2 1 7/8-14 3/4-16* 1-1/8 1.500 1/2 1 2-3/8
1 7/8-14 3/4-16* 1-1/8 1.500 1/4 3/4 2-3/8
2
1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 2-5/8
1 7/8-14 3/4-16 1-1/8 1.500 1/4 3/4 2-3/8
2 1/2 1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 2-5/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/2 1-1/4 2-7/8
1-3/8 1-1/4-12 1-14 1-5/8 2.000 1/4 7/8 2-3/4
3 1/4 1-3/4 1-1/2-12 1-1/4-12 2 2.375 3/8 1-1/8 3
2 1-3/4-12 1-1/2-12 2-1/4 2.625 3/8 1-1/4 3-1/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/4 1 3
4 2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 3-3/8
2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 3-3/8
5
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 3/8 1-3/8 3-3/8
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 3/8 1-3/8 3-3/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 1/4 1-1/4 3-1/2
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 1/4 1-1/4 3-1/2
6
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 1/4 1-1/4 3-1/2
4* 3-3/4-12 3-12 4 4.750 1/4 1-1/4 3-1/2
*Special request
 CD-Dia NR Add Stroke
Bore EX E EE G H J K MA
-0.0005 Rad LB P XC
1½ 7/16 0.500 2-1/2 SAE8 2-1/8 3-3/8 1-1/2 3/8 3/4 5/8 13-1/8 4-1/2

Find in table
2 21/32 0.750 3 SAE8 2-3/8 4 1-1/2 7/16 1 1 13-3/8 4-1/2
2½ 21/32 0.750 3-1/2 SAE8 2-3/8 4-9/16 1-1/2 7/16 1 1 13-3/8 4-1/2

below
3¼ 7/8 1.000 4-1/2 SAE12 2-3/4 4-1/2 1-3/4 9/16 1-1/4 1-1/4 14-1/4 4-3/4
4 1-3/16 1.375 5 SAE12 2-7/8 5 1-3/4 9/16 1-7/8 1-5/8 14-3/8 4-3/4
5 1-17/32 1.750 6-1/2 SAE12 2-7/8 6-1/2 1-3/4 13/16 2-1/2 2-1/16 14-7/8 5-1/4
6 1-3/4 2.000 7-1/2 SAE16 3-1/4 7-1/2 2-1/4 7/8 2-1/2 2-3/8 16-1/4 5-1/2

Thread (KK) XC +
Bore Rod A B V W Y
IM LF – SM Stroke
1 1/2 1 7/8-14 3/4-16* 1-1/8 1.500 1/2 1 14-7/8 2-3/8
1 7/8-14 3/4-16* 1-1/8 1.500 1/4 3/4 15-3/8 2-3/8
2
1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 15-5/8 2-5/8
1 7/8-14 3/4-16 1-1/8 1.500 1/4 3/4 15-3/8 2-3/8
2 1/2 1-3/8 1-1/4-12 1-14 1-5/8 2.000 3/8 1 15-5/8 2-5/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/2 1-1/4 15-7/8 2-7/8
1-3/8 1-1/4-12 1-14 1-5/8 2.000 1/4 7/8 16-5/8 2-3/4
3 1/4 1-3/4 1-1/2-12 1-1/4-12 2 2.375 3/8 1-1/8 16-7/8 3
2 1-3/4-12 1-1/2-12 2-1/4 2.625 3/8 1-1/4 17 3-1/8
1-3/4 1-1/2-12 1-1/4-12 2 2.375 1/4 1 17-1/2 3
4 2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 17-5/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 17-7/8 3-3/8
2 1-3/4-12 1-1/2-12 2-1/4 2.625 1/4 1-1/8 18-1/8 3-1/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 3/8 1-3/8 18-3/8 3-3/8
5
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 3/8 1-3/8 18-3/8 3-3/8
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 3/8 1-3/8 18-3/8 3-3/8
2-1/2 2-1/4-12 1-7/8-12 3 3.125 1/4 1-1/4 20 3-1/2
3* 2-3/4-12 2-1/4-12 3-1/2 3.750 1/4 1-1/4 20 3-1/2
6
3-1/2* 3-1/4-12 2-1/2-12 3-1/2 4.250 1/4 1-1/4 20 3-1/2
4* 3-3/4-12 3-12 4 4.750 1/4 1-1/4 20 3-1/2
*Special request
 Pivot Pins
PART # CD CL SHEAR CAPACITY lbs
81-001 1/2 1-7/8 8600
81-002 3/4 2-5/8 19300
81-003 1 3-1/8 34300
81-004 1-3/8 4-3/16 65000
81-005 1-3/4 5-3/16 105000
81-006 2 5-3/16 137000

Rod Clevises
PART # KK A CB CD CE CW ER LOAD lbs
82-001 7/16-20 3/4 3/4 1/2 1/2 1/2 1/2 4250
82-002 1/2-20 3/4 3/4 1/2 1/2 1/2 1/2 4900
82-003 3/4-16 1-1/8 1-1/4 3/4 2-1/8 5/8 3/4 11200
82-004 3/4-16 1-1/8 1-1/4 3/4 2-3/8 5/8 3/4 11200
82-005 7/8-14 1-5/8 1-1/2 1 2-15/16 3/4 1 18800
82-006 1-14 1-5/8 1-1/2 1 2-15/16 3/4 1 19500
82-007 1-14 1-5/8 1-1/2 1 3-1/8 3/4 1 19500
82-008 1-1/4-12 2 2 1-3/8 3-3/4 1 1-3/8 33500
82-009 1-1/4-12 2 2 1-3/8 4-1/8 1 1-3/8 33500

Eye Brackets
LOAD
PART # CD CB DD E F FL M MR R
lbs
85-001 1/2 3/4 13/32 2-1/2 3/8 1-1/8 1/2 9/16 1-5/8 4100
85-002 3/4 1-1/4 17/32 3-1/2 5/8 1-7/8 3/4 7/8 2-9/16 10500
85-003 1 1-1/2 21/32 4-1/2 7/8 2-3/8 1 1-1/4 3-1/4 20400
85-004 1-3/8 2 21/32 5 7/8 3 1-3/8 1-5/8 3-13/16 21200
85-005 1-3/4 2-1/2 29/32 6-1/2 1-1/8 3-3/8 1-3/4 2-1/8 4-15/16 49500
85-006 2 2-1/2 1-1/16 7-1/2 1-1/2 4 2 2-7/16 5-3/4 70000

Clevis Brackets
LOAD
PART # CD R CB CW DD E F FL M MR
lbs
86P-001 1/2 1-5/8 3/4 1/2 3/8-24 2-1/2 3/8 1-1/8 1/2 9/16 7300
86P-002 3/4 2-9/16 1-1/4 5/8 1/2-20 3-1/2 5/8 1-7/8 3/4 1-1/16 14000
86P-003 1 3-1/4 1-1/2 3/4 5/8-18 4-1/2 3/4 2-1/4 1 1-1/8 19200
86P-004 1-3/8 3-13/16 2 1 5/8-18 5 7/8 3 1-3/8 1-3/4 36900
86P-005 1-3/4 4-15/16 2-1/2 1-1/4 7/8-14 6-1/2 7/8 3-1/8 1-3/4 1-7/8 34000
86P-006 2 5-3/4 2-1/2 1-1/4 1-14 7-1/2 1 3-1/2 2 2-1/8 33000

Spherical Rod Eye

PART # KK A CD CE ER EX JL LE LOAD lbs
83SP-001 7/16-20 11/16 1/2 7/8 7/8 7/16 7/8 3/4 2600
83SP-002 3/4-16 1 3/4 1-1/4 1-1/4 21/32 1-5/16 1-1/16 9400
83SP-003 1-14 1-1/2 1 1-7/8 1-3/8 7/8 1-1/2 1-7/16 16800
83SP-004 1-1/4-12 2 1-3/8 2-1/8 1-13/16 1-3/16 2 1-7/8 28500
83SP-005 1-1/2-12 2-1/8 1-3/4 2-1/2 2-3/16 1-17/32 2-1/4 2-1/8 43000
83SP-006 1-7/8-12 2-7/8 2 2-3/4 2-5/8 1-3/4 2-3/4 2-1/2 70200

Rod Eyes
PART # KK A CB CD CA ER LOAD lbs
83-001 7/16-20 3/4 3/4 1/2 1/2 5/8 5700
83-002 1/2-20 3/4 3/4 1/2 1/2 5/8 5700
83-003 3/4-16 1-1/8 1-1/4 3/4 2-1/6 7/8 12100
83-004 7/8-14 1-1/8 1-1/2 1 2-3/8 1-7/16 13000
83-005 1-14 1-5/8 1-1/2 1 2-13/16 1-3/16 21700
83-006 1-1/4-12 2 2 1-3/8 3-7/16 1-9/16 33500
83-007 1-1/2-12 2-1/4 2-1/2 1-3/4 4 2 45000
83-008 1-3/4-12 2-1/4 2-1/2 2 4-3/8 2-7/8 53500
83-009 1-7/8-12 3 2-1/2 2 5 2-1/2 75000
 Bore E H R
1½ 2½ 3-3/8 1.63
2 3 4 2.05
2½ 3½ 4-9/16 2.55
3¼ 4½ 4-1/2 3.25
4 5 5 3.82
5 6½ 6-1/2 4.95
6 7½ 7-1/2 5.73

Tie Rod Nut Torque Specification

Cylinder Bore (in) Tie Rod Number Tie Rod Thread Torque Dry – lbs ft
1-1/2 4 3/8-24 18
2 4 1/2-20 45
2-1/2 4 1/2-20 45
3-1/4 4 5/8-18 120
4 4 5/8-18 130
5 4 7/8-14 230
6 4 1-14 300

15
 how to order... WARRANTY
November 2007

SERIES BORE SIZE ROD DIAMETER

COWAN DYNAMICS, hereinafter referred to as “The
Seller”, warrants products of its manufacture to be free
L C - 1 1/2” E - 1” from defects in material or workmanship under normal
D - 2” G - 1 3/8” use for 12 months after the date of shipment from the
E - 2 1/2” H - 1 3/4” factory.
G - 3 1/4” J - 2”
H - 4” K - 2 ½” During the warranty period “The Seller’s” sole obligation
K - 5” L - 3” is to either repair or replace a defective product as may be
L - 6” M - 3 ½” elected at “The Seller’s” sole discretion. All transportation
N - 4” costs are at the buyer’s expense.

All defective parts must be returned to COWAN

ROD THREAD STYLE ROD THREAD SIZE DYNAMICS, within the warranty period. Written
authorization for such return must first be obtained.
N - Standard Thread 1 - small male
M - Metric 2 - intermediate male Any alteration or repair of the goods by a party not
3 - full male specifically authorized in writing by “The Seller” shall
4 - small female automatically void the warranty.
CUSHIONS 9 - flange
8 - none In no event shall “The Seller” be liable for any incidental,
consequential or special damages of any kind or nature
MOUNTINGS whatsoever, including but not limited to lost profits arising
from or in any way connected with agreement or items
E5 ME5 mount: Head rectangular sold hereunder, wether alleged to arise from breach of
P1 MP1 mount: Female clevis contract, express or implied warranty, or in tort, including
SEALS P5 MP5 mount: Spherical Bearing without limitation, negligence, failure to warn or strict
F1 MF1 mount: Head rectangular flange liability.
N - Standard Seals
F - High Temp F5 MF5 mount: Head square flange
This warranty shall be rendered null and void when, in the
L - Low Temp X1 MX1 mount: Extended tie rod both ends
judgment of COWAN DYNAMICS, if the equipment has
W - Water Content X3 MX3 mount: Extended tie rod head end been subject to abnormal or abusive use or lack of proper
E - EPDM X2 MX2 mount: Extended tie rod cap end care and maintenance by the buyer, or when it has been
X0 MX0 mount: No mount determined that environmental or application conditions
PORTS S2 MS2 mount: Side lugs have exceeded those specified for normal use of a
SH2 MS2 mount: Side lugs, thrust key on head end specific product.
SXX - SAE S3 MS3 mount: Centerline lugs
BXX - BSPP T1 MT1 mount: Head end trunnion Notwithstanding the foregoing, warranties for items built
FXX - SAE Code 61 flange T2 MT2 mount: Cap end trunnion wholly or partially to buyer’s design or specifications are
TX Non NFPA Cap end trunnion limited to dimensional conformity to engineering
XX denotes position T4 MT4 mount: Intermediate trunnions drawings supplied by “The Seller” or Buyer.
ex: S12 = SAE Pos 1 head, Pos 2 Cap (Specify XI after stroke)
Indicate M for Manifold mount Finished materials and accessories purchased from
ex: S1M = SAE pos 1 head end, other manufacturers are warranty only to the extent of the
Manifold mount cap end manufacturers’ warranty to “The Seller”.

OPTIONS “The Seller” makes no warranty of any kind whatsoever,

expressed or implied, other than as specifically stated
Please consult the factory for additional option codes herein; and there are no warranties of merchantability
and/or fitness for a particular purpose which exceed the
EXAMPLE obligations and warranties specifically state herein.

Parts furnished without charge as replacements for

L G H N1 8 E S 11 T1 12.0 original parts under warranty are warranted for the
remainder of the original warranty period.
12 ” Stroke
Head Trunnion Force Majeure: “The Seller” does not assume the risk of
Port Position and shall not be liable for delay or failure to perform any of
“The Seller’s” obligations by reason of circumstances.
SAE Ports
beyond the reasonable control of The Seller (hereinafter
EPDM Seals “Events of Force Majeure”). Events of Force Majeure shall
Non Cushioned include without limitation, accidents, act of God, strikes of
Small male threads labor disputes, acts, laws, rules or regulations of any
government of government agency, fires, floods, delays
1 3/4” Rod diameter or failures, in delivery of carriers or suppliers, shortages of
3 1/4” Bore materials and any other cause beyond Seller’s control.
L Series

cowan dynamics inc.

6194, rue Notre-Dame Ouest, Montreal, Quebec, H4C 1V4 211 Watline Ave Unit 205, Mississauga, Ontario, L4Z 1P3

(514) 341-3415 Web Site: www.cowandynamics.com (905) 829-2910 Web Site: www.cowandynamics.com
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