REMOVING/INSTALLING Gearbox

RWD WHEELCHAIRS

PROCEDURE 16

(FIGURE 10)

CAUTION

Perform the following procedure in a des- ignated work area to prevent damage to flooring (carpeting, tile, etc.).

Removing

1.Remove the drive wheels from the wheelchair. Refer to REMOVING/INSTALLING DRIVE WHEELS in PRO- CEDURE 12 of this manual.

2.Remove the drive wheel hub from the existing gearbox drive shaft. Refer to REMOVING/INSTALLING DRIVE WHEEL HUBS in PROCEDURE 12 of this manual.

NOTE: Note mounting position of gearbox to suspension arm before disassembly.

NOTE: To reposition the gearbox on the suspension arm, refer to WEIGHT DISTRIBUTION in this procedure of the manual.

	5/16-18 x	5/16-18 x
	2-1/2-inch
		1-1/4-inch
	Hex
		Hex
	Screws
		Screws

Suspension

Arm

Gearbox

Motor

FIGURE 10 - REMOVING/INSTALLING GEARBOX

R W D

W H E E L C H A I R S

3.Removethefour(4)hexscrewsthatsecuretheexisting motor/gearbox to the suspension arm.

4.Removeexistingmotorfromgearbox.RefertoMOTOR REPLACEMENT in PROCEDURE 12 of this manual.

5.Installexistingmotorontonewgearbox.RefertoMOTOR REPLACEMENT in PROCEDURE 12 of this manual.

Installing

CAUTION

The REAR hex screws that secure the gear- box to the suspension arm MUST be 5/16- 18 x 2-1/2-inches long and the FRONT hex screws that secure the gearbox to the sus- pension arm MUST be 5/16-18 x 1-1/4-inches long. Otherwise damage to the gearbox casting can result.

1.Position NEW gearbox with noted mounting holes.

2.When reassembling gearbox to suspension arm, use Loctite242andtorquehexscrewsto160-inchpounds.

NOTE: Replace any parts that show signs of wear or dam- age.

3.Reinstall the drive wheel hub to the new gearbox driveshaft.Referto REMOVING/INSTALLINGDRIVE WHEEL HUBS in PROCEDURE 12 of this manual.

4.Reinstallthedrivewheelsontothewheelchair.Referto REMOVING/INSTALLING DRIVE WHEELS inPRO- CEDURE 12 of this manual.

ADJUSTING WEIGHT DISTRIBUTION (FIGURE 11)

NOTE: Seat mount plates and seat support brackets al- lowtheseatframetoberepositionedalongthebaseframe. The range is determined by position of the seat stop screws. The front seat stop screw is positioned at 4-inches and the rear seat stop screw is positioned at 10-inches. Both seat stop screw positions are measured from the front of the base frame.

NOTE: The position of the seat support brackets is factory set at 7-inches, this measured from the front of the base frame to the front of the seat support bracket. This will put about 70% of the total weight of the chair and user over the large wheels. However, this setting may not be the most de- sirable in terms of maneuverability, front rigging clearance and comfort for the user.

Adjustment Options

NOTE: This section will provide the user with some knowl- edgeofwhattoexpectifthefollowingadjustmentsaremade.

1. Movingtheseatforward.

Advantage:	This adjustment allows more clear-
	anceforfrontriggingsandamorestable
	“feel” for the user.
Disadvantage:	Moreweightisputonfrontcastersand
	makes turning more difficult.

NOTE: This option can also be accomplished by moving the motor backward on the suspension arm. Refer to RE- POSITIONINGGEARBOX inthisprocedureofthemanual.

Arrow FWD, RWD, MWD specifications

Invacare is a renowned name in the field of mobility technologies, consistently innovating and enhancing the mobility devices market. Among its outstanding offerings are the Invacare MWD (Mid Wheel Drive), RWD (Rear Wheel Drive), and Arrow FWD (Front Wheel Drive) wheelchairs. Each of these models serves unique user needs, featuring distinct designs and functionalities.

The Invacare MWD is engineered for exceptional maneuverability. Its mid-wheel drive technology provides a centralized drive wheel, allowing for tight turns and easy navigation in confined spaces. This makes the MWD particularly suitable for indoor use, where space can be limited. The MWD also features advanced suspension systems, offering superior shock absorption. This results in a smoother ride over various terrains, enhancing user comfort and stability.

On the other hand, the Invacare RWD focuses on robust outdoor performance. With its rear-wheel drive configuration, this model has excellent traction and provides powerful acceleration. The RWD is designed for versatility, equipped with larger wheels that can handle uneven terrain while providing a stable ride. Its durable construction ensures enhanced longevity, making it an ideal choice for users who lead an active lifestyle and require reliable mobility solutions on rugged ground.

The Arrow FWD wheelchair brings another dimension with its front-wheel drive system. This design allows users to easily navigate obstacles as the front wheels can pivot over them. The Arrow FWD is particularly suited for both indoor and outdoor use, as it combines the agility of the MWD with the stability seen in the RWD. It features a compact design, making it easier for users to position themselves in various settings and social situations.

All three models utilize Invacare's cutting-edge technologies, such as advanced control systems and customizable seating options, enabling users to find their optimal comfort and support levels. The customizable features also cater to individual user needs, promoting enhanced independence.

In summary, Invacare’s MWD, RWD, and Arrow FWD wheelchairs represent an impressive blend of functionality, durability, and user-centric design. Each model presents its own unique technologies and attributes, allowing users to make informed choices based on their specific mobility requirements, lifestyle, and preferences. Whether navigating tight indoor spaces or tackling outdoor challenges, Invacare’s range of wheelchairs ensures that users can experience mobility with confidence and ease.

Invacare Arrow FWD, MWD, RWD REMOVING/INSTALLING Gearbox, Adjusting Weight Distribution Figure

Models: Arrow FWD RWD MWD

RWD WHEELCHAIRS