Determining Frame Size; Front Seat-To-Floor Height Adjustment - Invacare A4 Owner's Manual

Determining Frame Size

NOTE: For this procedure, refer to FIGURE 6.11.
1. To determine frame size, measure from the bottom of the caster headtube to the top of the seat rail at the edge of the seat
upholstery.
2. Refer to the chart to determine the frame size.
LENGTH (INCHES
11
12
13
14
15

Front Seat-to-floor Height Adjustment

NOTE: For this procedure, refer to FIGURE 6.12.
NOTE: Refer to STABILITY on page 9 for warnings concerning wheelchair stability.
Seat‐to‐floor height is determined by measuring from the top of the seat rail to the ground/floor. The different seat‐to‐floor heights
are possible by using different combinations of caster size, caster position, and rear wheel size.
1. Refer to FIGURE 6.12 and the charts on the following pages to determine available front seat‐to‐floor heights for each
wheelchair frame size.
2. Determine the changes needed to the casters, forks and rear wheels by reading across the chart for the seat‐to‐floor height
determined in STEP 1.
3. After determining the rear wheel size, replace the rear wheels. Refer to Removing/Installing Rear Wheels on page 37.
4. After determining the caster size, replace the casters and/or forks. Refer to Replacing/Adjusting Casters on page 40
and/orReplacing Forks on page 41.
5. After replacing or adjusting the caster size, refer to Adjusting Caster Height on page 42 to add/remove fork spacers and
add/remove washers to ensure caster headtubes are perpendicular to the ground.
6. Anti‐tipper height (if applicable) MUST be adjusted to maintain 1
wheels and the floor. Refer to Anti‐tipper Adjustment/Replacement on page 50.
7. Ensure wheel locks engage properly. Refer to Wheel Lock Adjustment/Replacement on page 40.
SHORT FORK
NON SUSPENSION ONLY
Part No 1110545
FRAME SIZE
17
18
19
20
21
LONG NON SUSPENSION FORK
Top
Middle
Bottom
FIGURE 6.12 Front Seat-to-floor Height Adjustment
FIGURE 6.11 Determining Frame Size
1
/ to 2 inch clearance between the bottom of the anti‐tipper
2
43
SECTION 6—WHEELS
LONG SUSPENSION FORK
Top
Middle
Bottom
A4 Owner's Manual