250
C
D
B
A
Double-Pull Cylinders
Double-pull cylinders have rods on both ends and are used with 
mainsheet travelers or jib sheet car systems to easily adjust loaded 
sails. As oil is pumped into the cylinder, the rod pulls the traveler 
while the other rod eases. Reverse the process and the eased rod 
pulls the other way. Delrin® isolaters separate the cylinders from 
the metal elements of the hull to prevent corrosion.
What makes Harken double-pull cylinders unique is the way they 
are installed on the boat. To take the cylinder off the mounting 
brackets for service, the user simply removes four screws, 
leaving both brackets in place.
Double-pull cylinders do not come with end fittings on the rod 
because of the variety of cylinder functions. On page 249 and 251, 
you’ll find a selection of end fittings to choose from. 
Fittings are sold separately.
Disassembled endcap with Delrin
isolator.
Length overall
Stroke (S)
*Overall cylinder length equals zero stroke length plus two times the desired stroke.     **Overall bracket spacing equals zero stroke bracket spacing plus the desired stroke.
HYCP03513xxxxBNN
Double-Pull Cylinder Part Number
Cylinders are made to order. Specify desired stroke length in
 millimeters and optional end fittings when ordering.
Hydraulic
Cylinder 
Action type
P = Double-acting pull/pull
Bore diameter (mm)
Rod diameter (mm)
Stroke length (mm)
Materials 
B = Black hardcoat-anodized aluminum
Optional rod end fittings (specify each end separately) 
C, L, or N (see page 233 for options); rod end blocks (see page 235)
Overall bracket spacing
Delrin is a registered trademark of E. I. du Pont de Nemours and Company or its affiliates.
Part
No.
- Size
Zero stroke 
length (A)*
Zero stroke 
bracket spacing 
(B)**
Mounting 
retainer Ø (C)
Outside Ø
(D)
Rod
thread size
Rod thread 
length
Weight
lb @ zero stroke
kg @ zero stroke 
in
mm
in
mm
in
mm
in
mm
UNF 2A
in
mm
length + lb/in stroke
length + kg/mm stroke
 HYCP02511xxxxBNN 
 -6 
 11.84 
 300.8 
 8.55 
 217 
 1.6 
 41 
 2 
 51 
 7/16-20 
 1 
 25 
 2.07 + .14 
 0.94 + .002 
 HYCP03513xxxxBNN 
 -10 
 13.86 
 352 
 9.27 
 235.5 
 1.9 
 47 
 2.2 
 57 
 1/2-20 
 1.6 
 41 
 3.41 + .25 
 1.55 + .005 
 HYCP04016xxxxBNN 
 -12 
 13.56 
 344.5 
 9.03 
 229.4 
 1.9 
 47 
 2.2 
 57 
 5/8-18 
 1.6 
 41 
 3.87 + .33 
 1.76 + .006 
 HYCP04516xxxxBNN 
 -17 
 13.85 
 351.9 
 9.31 
 236.4 
 1.9 
 47 
 2.3 
 58 
 5/8-18 
 1.6 
 41 
 4.31 + .35 
 1.96 + .006 
 HYCP05519xxxxBNN 
 -22 
 15.81 
 401.6 
 10.22 
 259.6 
 2.2 
 55 
 2.9 
 73 
 3/4-16 
 2.1 
 53 
 7.05 + .51 
 3.20 + .009 
 HYCP06522xxxxBNN 
 -30 
 17.36 
 441 
 11.77 
 298.8 
 2.2 
 55 
 3.2 
 81 
 7/8-14 
 2.1 
 53 
 9.48 + .63 
 4.30 + .011 
 HYCP07525xxxxBNN 
 -40 
 22.31 
 566.7 
 14.16 
 359.7 
 3 
 76 
 3.8 
 97 
 1-12 
 3.2 
 82 
 16.21 + .87 
 7.36 + .016 

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