Invacare Arrow Replacing Stabilizer, Cylinder Spring Figure, Adjusting Weight Distribution

MWD WHEELCHAIRSPROCEDURE 15

REPLACING STABILIZER	ADJUSTING WEIGHT DISTRIBUTION
CYLINDER SPRING (FIGURE 9)	(FIGURE 10)
NOTE: Stabilizer springs are only on wheelchair mod-	NOTE: The seat mount plates and seat support brackets
els built before 7/1/1999.	allow seat frame to be repositioned along the base frame.

1.Remove mounting screw and locknut that secures NOTE: The position of the seat support brackets is factory top of the stabilizer fork assembly to the base frame. set at 5-1/2-inches from the front end of the base frame.

2.	Unthread adjustment barrel and remove from stabi-	Use the following chart as a starting point.
	lizer rod.	Weight of	Distance of Seat
3.	Unthread jam nut and remove from stabilizer rod.	User	Support Bracket*
4.	Unthread adjustment nut and remove from stabilizer	under 200-lbs	5-7-inches
	rod.	over 200-lbs	6-8-inches
5.	Remove spring retainer from stabilizer rod.	* Distance measured from the front of the base frame to
6.	Remove existing stabilizer spring.	the front of the seat support bracket.
7.	Install NEW stabilizer spring.	NOTE: Following the above chart will put 85-90% of the
		total weight of the chair and user over the large wheels.
8.	Reinstall spring retainer.
		However, these settings may not be the most desirable in
9.	Reinstall adjustment nut.	terms of maneuverability and comfort for the user.
10. Reinstall jam nut.		Adjustment for Optimum Performance
11. Reinstall adjustment barrel.		1. Loosen the four (4) mounting screws that secure the
12. Adjuststabilizer.RefertoADJUSTINGSTABILIZERS		seat support brackets to the base frame.
	in this procedure of the manual.	2. Adjust seat back until one (1) of the following occurs:
	Base Frame	A. The clearance of the front riggings and the stabi-
		lizers is at a minimum or
		B. The rear stop is contacted.

	Mounting	WARNING
		DO NOT adjust seat beyond limit stops.
	Screw
		3. Retighten mounting screws securing the seat support
		brackets to the base frame.
Locknut	Adjustment	4. Test wheelchair for handling.
		5. If handling of the power wheelchair is drifting, repeat
	Barrel
	Jam Nut	thisproceduremovingseatupinsmallincrementsuntil
		the chair handles properly.
		6. Once the seat is adjusted to the point of proper han-
	Adjustment	dling, comfort adjustments can be made
	Nut	7. Check distance the stabilizer wheels are off the floor.
		A. If distance is between 3/8 and 1/2-inches off of the
Stabilizer	Spring	floor the user will experience a “normal” amount of
Spring		rocking when stopping or negotiating steeper in-
	Retainer	clines, depending on the amount of braking.
		B. If distance is greater than 1/2-inches off of floor
	Stabilizer	the amount of rocking the user experiences when
	Rod	stopping or negotiating steeper inclines will in-
		crease.
FIGURE 9 - REPLACING STABILIZER CYLINDER SPRING
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