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Field of Application 

Before using the Harken Ninja MultiAscend, read the instructions contained 

in this manual thoroughly. This instruction manual is an integral part of the 

product, and it supplies information for its correct safe use and maintenance. 

If you do not understand any of the instructions, please contact Harken’s 

authorized dealer. Harken shall not be liable for damages, injuries, or 

death caused by usage not covered in this manual or any non‑compliant or 

unsafe actions.
This manual is intended for specialized personnel or expert users.

Safety Information

General advice

Progress capture device for ascending rope, and short distance 

rope descents. 

Intended use

•  As a type B rope adjustment 

device compliant to the European 

Standard EN 12841:2006 (fully 

rated and locking chest ascender) 

up to a maximum rated load of 

140 kg, that is a manually operated 

device which, when attached to 

a working line, locks under load 

in one direction and slides freely 

in the opposite direction, to be 

used on rope access systems and 

related activities.

•  This product can be used for 

hauling systems: this use is to be 

considered outside the scopes of 

the Regulation 2016/425. 

•  This product should only be 

used by one person at a time; 

this equipment should be a 

personal issue item.

•  This product is intended to prevent 

the risk of falls from a height during 

acceptable activities.

•  As a rope clamp compliant to the 

European Standard EN 567:2013 

to be used on mountaineering 

and related activities, that is 

a mechanical device which, if 

attached to a rope or an accessory 

cord of appropriate diameter, 

will clamp under load in one 

direction and move freely in the 

opposite direction. 

Improper use

•  Do not use with wire rope.
•  Do not use as a fall arrest device.
•  Do not use this product outside 

of its limitations, or for any other 

purpose than that for which it is 

intended. 

 

•  Do not alter, tamper, or add 

to this equipment without the 

manufacturer’s prior written 

consent. Any repair shall only be 

carried out in accordance with the 

manufacturer’s procedures.

•  Do not use this rope clamp in 

weather or environmental extremes.

Personal protective equipment

•  Harness, gloves, and helmet 

that meet national and/

or local requirements are 

recommended.

•  Follow your national and/or 

local regulatory requirements 

for Personal Protective 

Equipment (PPE).

Risks

•  This equipment shall only be used 

by a person trained and competent 

in its safe use.

•  Activities involving the use of the 

Ninja MultiAscend are inherently 

dangerous. You are responsible for 

your own actions and decisions.

•  Read and understand all 

instructions before use

•  Get specific training on the 

Ninja MultiAscend’s proper use.

•  Become acquainted with 

MultiAscend’s capabilities 

and limitations. 

•  Understand and accept the risks 

involved.

•  Users must be medically fit for 

all activities the MultiAscend is 

involved in. Users must be capable 

of controlling their own safety in any 

emergency situation.

•  Failure to heed any of these 

warnings could result in severe 

injury or death.

•  Overloading or dynamic load on the 

Ninja MultiAscend may damage the 

anchor rope.

•  Verify that the product markings are 

legible. 

Fig 4

 

WARNINGS

Do not use as a fall arrest device.
Anchor ropes should be attached to the anchor above the user. 

Slack between the anchor and the user should be avoided.
Any loading above the published recommendations or dynamic 

loading on the MultiAscend may damage both the rope and the 

device. Stay within the limitations of the specifications and 

lengths documented. 
Only competent personnel trained to use this equipment safely 

may use it.
Be aware of any dangers that may occur due to the use of 

combined items, in which the safe function of any one item is 

affected by, or interferes with, the safe function of another.
Do not trail or loop this product over sharp edges. Trailing or 

looping safety equipment in such a way may result in death 

or injuries.
Do not make any alteration or additions to the equipment 

without Harken’s prior written consent. All repairs should only 

be carried out according to Harken procedures.
If the product is sold outside of its original country of 

destination, the reseller must provide instructions for the 

following: use, maintenance, periodic examination, and repair, 

in the language of the country where the product is to be used.

Product descriptions/components

Materials: 

The product is made of aluminum body and swing plate; stainless 

steel hardware, pawls, and harness connection; nylon webbing for the strap; 

stainless steel for the metal components of the strap.

Dimensions  -  Fig 2

Fig 1

YYYYDDD-XXXX

6

7

8

9

2008

EN12841: 2006-B

Ø11 -13mm

140kg

EN567: 2013

Ø9 -13mm

1

4

5

2

3

Fig 4

Nomenclature of parts  -  Fig 5

A.  Top adjustment strap
B.  Swing plate
C.  Latch
D.  Pawls

E.  Capscrew
F.  Bottom saddle bracket

G. Pawl triggers

H.  M4 Ta

pped hole* 

I.  Body
J.  Cotter ring

K.  Nylon insert locknut
*for optional locking fastener 

swing plate

Certifications 

The MultiAscend device complies with regulation (EU) 2016/425 relating 

to PPE.
EN 567:2013 ‑ 9–13 mm rope
Tested for certification purposes with the following models of rope:
Tendon Canyon Dry Ø9 mm 

Bluewater Protac Ø9 mm 

Tendon Static Ø9 mm 

Teufelberger KMIII Ø9 mm and Ø13 mm
EN 12841.2006 B ‑ Ø: 11–13 mm, maximum rated load: 140 kg 
Tested for certification purposes with the following models of rope (both 

low stretch kernmantel ropes according to EN 1891, type A):
Beal Access Ø11 mm 

Teufelberger KMIII Ø13 mm
Note: This product has been approved for the use under the following 

specific conditions, as indicated in the standard EN 12841:2006: heat, cold, 

wet, and oil.
Note: When the adjustable anchor line is loaded by the full weight of the 

user this becomes a working line and an independently anchored safety line 

should be used in addition for optimum safety of the user.
Note: The primary function of Type B rope adjustment devices is progression 

along the working line, and they shall always be used in conjunction with, 

and connected to, a Type A rope adjustment when used in accordance with 

EN 12841:2006.
Note: When used as a rope adjustment device compliant with EN 12841, 

only low stretch Type A kernmantle ropes compliant with EN 1891 shall be 

used. When used as a rope clamp compliant with EN 567:2013, the device 

can be used with any of the following options:
•  Dynamic mountaineering ropes compliant to EN 892
•  Accessory cords compliant to EN 564
•  Low stretch kernmantle ropes compliant with EN 1891
Note: The harness must be compliant with EN 813 or EN 12277.
Note: It is recommended to use this device only in conjunction with 

CE‑marked PPE for compliance with 2016/425.
The EU examination certificate and production control phase were carried 

out by Dolomiticert S.C.A.R.L. EU Notified Body (N.B. 2008, Villanova Zona 

Industriale 7/A, 32013 Lonarone (BL) — Italy‑Tel. +39 0437 573407).
The EU Declaration of Conformity can be downloaded from the website 

www.harken.com.
This manual can be changed without notice.
Consult the website for updated versions or other languages not in 

this manual.

Product labeling  Fig 4

1.   CE mark and number of the 

notified body involved in the 

control of the production

2.   Certification information regarding 

EN 12841:2006

3.   Certification information regarding 

EN 567:2013

4.  Latch open direction

5.  Correct

 loading direction

6.  Manufacturer’s part number
7.  Name and address of 

manufacturer

8.  Read the manual
9.  Serial number of device

0000 000 - 000

Unit Serial Number

Control

Day of Manufacture

Year of Manufacture

The Serial number is in the format YYYYDDD‑XXXX. This format represents 

the following: 4‑digit year, 3‑digit day (Julian calendar count), and a 4‑digit 

individual identifier. For example, in the Julian calendar, the number 234 

represents August 22.

Use

Connection to the harness:

 Connect the 

bottom saddle bracket

 to 

an approved, rated, full‑strength point on the harness’ ventral (frontal) 

attachment 

Fig 15

. The MultiAscend is considered a full point of attachment 

when properly connected to a full body harness:
1.  Loop bottom saddle bracket 

through harness. 

Fig 11

 

and 

Fig 12

2.  Screw in cap screw until lock 

nut is tight. Cap screw and nut 

should turn together free from 

base. 

Fig 13

3.  Loop cotter ring in hole of 

cap screw.

4.  Connect upper webbing strap 

to sternal D‑ring connection of 

harness to hold up when not in 

use. 

Fig 14

 WARNING! Not all harnesses are compatible with this chest 

ascender. Consult manufacturer for recommendations. 

 WARNING! Only use lock nut once, then replace.
 WARNING! When using the MultiAscend as a chest ascender, 

never connect the chest ascender to the harness attachment 

point via an additional component (e.g., a connector or a 

lanyard). Always connect the saddle bracket directly to the 

harness attachment point.

Top adjustment strap

Attach as an alignment support per harness instructions. See 

Fig 1

 diagram 

of strap reeving. Ensure that the top adjustment strap cannot get caught in 

the pawls. 

 WARNING! Strap not for load bearing, only for 

alignment purposes

B
C

D

I

A

G

H

E

F

J

K

Fig 5

Harken Inc., USA - One Harken Way, N15W24983 Bluemound Rd., Pewaukee, WI 53072, USA    M1033 10/23    Made in USA    Printed in USA

Replacement parts

Part no.

Description

IN909

Pin, 

bottom saddle bracket,

 lock nut and cotter ring

IN910

Webbing strap replacement

IN909

IN910

Fig 3

40 mm

1.59"

120 mm

4.74"

Direction 

Direction 

of  

of  

Travel

Travel

73 mm

2.87"

148 mm

5.84"

108 mm

4.25"

Fig 2

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