Invacare 9000 Service Manual page 20

Cld cyclical level drive
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PROCEDURE 6
7. Repeat STEPS 1-6 until the caster points straight
ahead.
8. Balance the steering link. Refer to BALANCING THE
STEERING LINK in this procedure of the manual.
S
T
Balancing the Steering Link
E
NOTE: The steering link MUST be balanced to ensure it
E
is properly secured to the rod ends.
R
1. Remove the steering link from the fork. Refer to CON-
I
NECTING/REMOVING STEERING LINK TO/FROM
N
FORK in this procedure of the manual.
G
2. Rotate the steering link adjustment nuts until they
are against the steering link as shown in FIGURE 2.
L
DO NOT tighten
I
N
K
Front Caster
Drive Arm
Steering Link Adjustment Nuts
Rod End
Drive Arm Threads
NOTE: Threads are enlarged for clarity.
ALIGNING THE CASTER AND DRIVE ARM
Drive
Arm
Drive
Arm
Rod
End
Steering Link
BALANCING THE STEERING LINK
Steering Link
FIGURE 2 - ADJUSTING CASTER AND DRIVE ARM ALIGNMENT
3. Perform the following steps. Refer to CHART A for
an example of thread calculation.
A. Count the number of drive arm threads and steer-
ing pin threads between the rod ends and the
steering link.
B. Divide the number of threads determined in
STEP A in half.
C. Rotate the steering pin rod end and the steering
link until only the number of threads determined
STEP B are showing at each end.
4. Securely tighten both steering link adjustment nuts
against the steering link.
5. Connect the steering pin to the fork. Refer to CON-
NECTING/REMOVING STEERING LINK TO/FROM
FORK in this procedure of the manual.
Steering Link
Steering
Adjustment
Pin Rod
Nuts
End
CHART A - THREAD CALCULATION
Step
Steering Pin
3A
Threads
3A
3B
3C
20
STEERING LINK
Steering Pin
(INSTALLED)
Steering Pin Rod End
Description
Number
Drive Arm Threads
Steering Pin Threads
Total Number of Threads
Divide in Half
5
6
11
5.5

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