Stealth Products Drop Lock Hardware Guide

USER MANUAL
Seating Hardware
Stealth’s User Manual and Maintenance Guide for
2 or 4 Point Drop Lock Hardware
Drop Lock Hardware

i
Customer Satisfaction 1.0
Stealth Products strives for 100% customer satisfaction. Your complete
satisfaction is important. Please contact us with feedback or suggested
changes that will help improve the quality and usability of our products.
You may reach us at:
General
Read and understand all instructions prior to the use of the product. Failure to
adhere to instructions and warnings in this document may result in property
damage, injury, or death. Product misuse due to failure of the following
instructions will void the warranty.
Immediately discontinue use if any function is compromised, parts are missing,
loose, or shows signs of excessive wear. Consult with your supplier for repair,
adjustment, or replacement.
MDSS GmbH
Schiffgraben 41
30175 Hannover, Germany
Stealth Products, LLC
104 John Kelly Drive, Burnet, TX 78611
Phone: [phone] Toll Free: 1(800) 965-9229
Fax: [phone] Toll Free: 1(800) 806-1225
[email protected] www.stealthproducts.com

ii
Important Information 2.0
Important Information!
All persons responsible for fitting, adjustment, and daily use of the devices
discussed in these instructions must be familiar with and understand all safety
aspects of the devices mentioned. In order for our products to be used
successfully, you must:
 Read and understand all instrucons and warnings.
 Maintain our products according to our instrucon on care and maintenance.
 Devices should be installed and adjusted by a trained technician.
Supplier Reference
Supplier:
Telephone:
Address:
Purchase Date:
Model:

iii
Introduction 3.0
Before you install or begin using this product, it is important that you read
and understand the content of these installation and operating instructions.
The installation instructions will guide you through the possibilities with
the Drop Lock Hardware.
Instructions are written with the expressed intent of use with standard
configurations. They also contain important safety and maintenance
information. For further assistance, or more advanced applications, please
contact your supplier or Stealth Products at [phone] or toll free at
1-800-965-9229.
Always keep the operating instructions in a safe place so they may be
referenced as necessary.
All information, pictures, illustrations, and specifications are based on the
product information that was available at the time of printing. Pictures and
illustrations shown in these instructions are representative examples and are
not intended to be exact depictions of the various parts of the product.
Ordering Documentation
You can download additional copies of this User Manual on the Stealth website:
https://stlpro.site/stealth-docs
and search: Drop Lock Hardware User Manual in the search bar at the top of
the page.

iv
Warranty 4.0
Our products are designed, manufactured, and produced to the highest of
standards. If any defect in material or workmanship is found, Stealth Products
will repair or replace the product at our discretion. Any implied warranty,
including the implied warranties of merchantability and fitness for a particular
purpose, shall not extend beyond the duration of this warranty. Stealth
Products, LLC does not warrant damage due to, but not limited to:
Misuse, abuse, or misapplicaon of products.
Modicaon or product without wrien approval from Stealth Products, LLC.
Any alteraon or lack of serial number, where applicable, will automacally
void this warranty.
Stealth Products, LLC is liable for replacement parts only.
Stealth Products, LLC is not liable for any incurred labor costs.
No person is authorized to alter, extend, or waive the warranties of Stealth
Products, LLC.
Stealth Products warrants against failure due to defective materials
or workmanship:
Covers: 2 years
Hardware: 5 years
Electronics: 3 years
In Case of Product Failure
In the event of product failure covered by our warranty, please follow the
procedures outlined below:
1. Call Stealth at [phone] or toll free [phone].
2. Request the Returns Department or obtain an RA from the Returns Department and
follow department or documentaon instrucons.

v
Table of Contents 5.0
1.0 Customer Satisfaction ............................................................................ i
2.0 Important Information.......................................................................... ii
3.0 Introduction ........................................................................................... iii
4.0 Warranty................................................................................................. iv
5.0 Table of Contents ................................................................................... v
6.0 Warning Labels ..................................................................................... vii
6.1 Warning Labels ................................................................................................... vii
6.2 Limited Liability................................................................................................... vii
6.3 Testing.................................................................................................................... vii
7.0 User Safety .............................................................................................. 1
7.1 User Safety/Warning Information ................................................................. 1
8.0 Parts and Accessories ............................................................................ 2
8.1 2 Point Drop Lock Hardware........................................................................... 2
8.2 4 Point Drop Lock Hardware........................................................................... 3
9.0 Installation Instructions ........................................................................ 3
9.1 Drop Lock Installation ........................................................................................ 5

vi
Table of Contents 5.0
10.0 Mounting............................................................................................... 7
11.0 Transit Checklist ................................................................................... 8
11.1 Before Transit...................................................................................................... 8
11.2 Pre-Transit............................................................................................................ 8
12.0 Chair Safety ........................................................................................... 9
12.1 Chair Securement And Safety...................................................................... 9
13.0 Securing The Wheelchair .................................................................. 10
13.1 Guidelines.......................................................................................................... 10
14.0 First Time Use ..................................................................................... 11
14.1 Dealer Assistance........................................................................................... 11
14.2 User Testing ..................................................................................................... 11
14.3 Conditions Of Use ......................................................................................... 11
15.0 Maintenance ....................................................................................... 12
15.1 Care And Maintenance ................................................................................ 12

vii
Warning Labels 6.0
Warning Labels 6.1
Warnings are included for the safety of the user, client, operator and property.
Please read and understand what the signal words SAFETY, NOTICE, CAUTION,
WARNING and DANGER mean, how they could affect the user, those around
the user, and property.
Limited Liability 6.2
Stealth Products, LLC accepts no liability for personal injury or damage to
property that may arise from the failure of the user or other persons to follow
the recommendations, warnings, and instructions in this manual.
Testing 6.3
Initial setup and driving should be done in an open area free of obstacles until
the user is fully capable of driving safely.
The Drop Lock Hardware should always be tested without any person sitting in
the wheelchair until every alteration of the physical installation or adjustment is
complete.
NOTI CE
Identifies important information not related to injury, but
possible property damage.
SAFETY
Indicates steps or instructions for safe practices, reminders of
safe procedures, or important safety equipment that may be
necessary.
CA UTION Identifies a potential situation which (if not avoided) will
result in minor to moderate injury,and property damage.
WARNING Identifies a potential situation which (if not avoided) will
result in severe injury, death,and property damage.
DANGER Identifies an imminent situation which (if not avoided) will
result in severe injury, death,and property damage.

1
User Safety 7.0
The wheelchair user should transfer to the vehicle seat and use the vehicle installed
restraint system when feasible.
This seang system is designed only for use with wheelchair base frames that have been
successfully crash tested to the frontal impact requirements of WC19.
The wheelchair base must provide four securement points and pelvic belt anchor points
that conform to the requirements of WC19.
Always secure the wheelchair and occupant in a forward-facing posion in the vehicle.
The wheelchair should be used as indicated in the manufacturer’s instrucons.
Adjustable back supports should not be reclined to more than 30 degrees to the vercal
during travel in a vehicle unless necessary for the medical and postural needs of the
occupant.
Only belt restraints that comply with the provisions of ANSI/RESNA WC/Vol. 4, Secon
19/ISO 7176-19 and that have been dynamically tested in accordance with this standard
should be installed on the wheelchair for use as a restraint in a motor vehicle.
During travel, postural support devices should be posioned so they don’t interfere with
the proper posioning of these belt restraints.
These belts should limit occupant movement in a crash and reduce the likelihood of
ejecon from the vehicle and/or injurious contact with the vehicle interior.
Belt restraints should be posioned on the wheelchair occupant in accordance with
WTORS manufacturer’s instrucons as indicated in 6.3h.i thru 6.3h.vii.
Trays should be removed and secured in a safe locaon. A clear zone around the
wheelchair occupant should be ulized.
Any alteraons or substuons should not be made to the seang system or it’s parts
and components without consulng Stealth Products.
User Safety/Warning Information 7.1

2
Parts and Accessories 8.0
2 Point Drop Lock Hardware 7.1
Drop Lock Hardware is offered in both 2-point and 4-point hardware for WC20
approved seating. This hardware is very clean and has no sharp edges.
A basic setup of the 2 Point Drop Lock Hardware consists of:
 A le and right corresponding seat and back mount brackets.
 Hardware for quick removal of the seang system from the chair.
 Adjustable cane clamps are part of the assembly and are to be installed to the chair frame
permanently. These cane clamps are adjustable back and forth and vercally on the
canes.
 Seat to back hinge keeps the back and seat connected.
 Seat tabs to allow for proper support while the rear of the seat rests on the canes.
Hinged Seat to Back Bracket
NOTICE
Seat to Back Bracket and Seat Tabs are available in 2 Point Hardware only.
Seat Tab
Drop Lock Mount (2)
NOTICE Standard cane size is 1”.

3
Parts and Accessories 8.0
NOTICE
All screws are hand tightened with enough torque to keep the brackets secure.
4 Point Drop Lock Hardware 8.2
4 Point Drop Lock Hardware includes the following hardware:
NOTICE
Seat to Back Bracket and Seat Tabs are not included with 4 Point Hardware.
Drop Lock Mount (4)
NOTICE Standard cane size is 1”.

4
Installation Instructions 9.0
Drop Lock Installation 9.1
2 Point Drop Lock Hardware includes:
1/4-20 x 5/8” Socket Head Screws (A)
1/4-20 x 1/2” Socket Head Screws & 1/4-20 Nylon Nuts (B)
1/4-20 x 3/4” Buon Head Screws & 1/4-20 Flat Washers (C), (D)
Seat Tab (E)
NOTICE
3/16 and 5/32 T-Handles are used to install the hardware. Do not overtighten screws.
(A)
(B)
(B) (C)
(D)
(E)

5
Installation Instructions 9.0
4 Point Drop Lock Hardware includes:
 1/4-20 x 1 1/4 Socket Head Screws (A)
 1/4-20 x 1/2 Socket Head Screws & 1/4-20 Nylon Nuts (B)
 1/4-20 x 3/4 Buon Head Screws & 1/4-20 Flat Washers (C)
Mounting Instructions 9.2
1. To mount the hardware to the canes, loosen the socket head screws (A).
2. Posion the hardware at the desired locaon and ghten mount into posion.
3. If angle adjustment is needed, loosen socket head screws (B). Set to the desired angle and
reghten.
4. In order for the L-Bracket to be ush with the back, poke/burn holes through the fabric and
mount the buon head screws (C) to the back.
(A)
(B)
(C)
NOTICE
To mount the hardware to a seat base, follow the same mounting instructions
mentioned above.

6
Mounting 10.0
Picture shown includes full assembly of 2 Point Drop Lock Hardware for
the back:
Picture shown includes full assembly of 4 Point Drop Lock Hardware for
the back:

7
Mounting 10.0
Picture shown includes full assembly of 2 Point Drop Lock hardware for seats:
Picture shown includes full assembly of 4 Point Drop Lock hardware for seats:

8
Transit Checklist 11.0
Before Transit: 11.1
 Prior to transporng, always double check the e-downs and hardware.
 On e-downs and restraints, look for tears or worn webbing straps. Replace as necessary
and never use torn straps.
 Look for damaged hooks or loose e down hardware On the seang system, check for
loose screws aaching the hardware to the seat. These should be snug and not over
ghtened.
 The knob hardware should be snug and if transit pins are available, they should be
inserted. These pins keep the chair aached to the frame even in the event that a knob
were to come loose and come o the chair. If there is a tray or any items that can become
airborne or cause bodily harm in the event of a crash, relocate and secure them.
Pre-Transit 11.2
 The chair is in a forward facing posion.
 All hardware is checked for loose screws or damaged components.
 Check that all e-down straps are secure and restraints are not twisted.
 Any loose objects are removed and placed in secure areas.
 Seat belt restraints that are compliant with ANSI/RESNA WC/Vol. 4, Secon 19/ISO
7176-19 are ulized.
CA UTION
In the event that the chair is ever in an vehicular collision, check all hardware
thoroughly for damage. If there are any signs of damage have a qualified tech
inspect and replace the damaged components or send to Stealth Products for
a complete overhaul to ensure future safety.

9
Chair Safety 12.0
Chair Securement And Safety 12.1
The wheelchair occupant must be secured with dynamically crash-tested and
approved pelvic and upper torso belts or with a five point child restraint
harness as part of WTORS. Also, the pelvic belt should be angled between 45
and 75 degrees to the horizontal when viewed from the side. However, if the
user cannot achieve this standard, an optional zone of 30-40 degrees can
be utilized safely.

10
Securing the Wheelchair 13.0
General Guidelines 13.1
In order to meet WC20 standards, the chair must first abide by WC19 guidelines
and have approved WTORS (SAE J2249). All guidelines and literature provided
by the WTORS manufacturer must be followed.
Always secure the wheelchair and occupant in a forward facing position
in the vehicle.
 Aach the four e-down straps only to
designated, labeled transit securement points
indicated by anchor symbols on the wheelchair.
 Tighten the straps to suciently remove all slack.
Never aach e-downs to adjustable, moving, or
removable parts of the wheelchair such as
armrests, front riggings, and wheels.
 Posion the anchor points for the rear
e–down straps directly behind the rear
securement points on the wheelchair.
 The front e-down straps should anchor to
oor points that are spaced wider than the
wheelchair to provide increased lateral
stability.

11
First Time Use 14.0
Dealer Assistance 14.1
During first time use by the client, it is advised that the dealer or service
technician assists and explains the configuration to the customer (the user
and/or the attendant). If needed, the dealer can make final adjustments.
WARNI NG
The Drop Lock Hardware should only be prescribed and fitted by qualified
health care professionals.
User Testing 14.2
It is important that the customer is fully aware of the installation and how the
headrest can be adjusted in order to gain the best positioning possible. As a
dealer, proceed as follows:
Explain and show the customer how you have executed the installaon, and explain
the funcon.
Have the user test the position of the Drop Lock Hardware:
Is the hardware in the proper posion for the client?
Can the user safely operate the chair?
Is the placement of the Drop Lock Hardware in an opmal posion for the user?
If needed, adjust the hardware to the proper position.
Explain to the customer any possible issues and how to address them.
Conditions of Use 14.3
The Drop Lock Hardware is intended for use as installed by the dealer, in
accordance to the installation instructions in this manual:
The foreseen condions of use are communicated by the dealer or service technician to
the user and/or aendant during the rst me use.
If the condions of use change signicantly, please contact your dealer or a qualied
service technician to avoid excessive wear and tear or unintended damage.

12
Maintenance 15.0
SAFETY Replace or repair parts as needed.
DA NGER
Failure to comply with these warnings could result in serious bodily harm.
Care and Maintenance 15.1
 Ensure the hardware you are using stays in working order by keeping it cared for
and maintained.
 Periodically check the hardware for loose screws or worn parts.
 To clean, use general household cleaners.
 Tighten set screws unl they are snug.
NOTICE
Do not overtighten screws. Overtightening will prevent hardware from
functioning properly and could irreversibly damage the hardware.