Via Seating 4U User manual

4u
user guide
205 Vista Boulevard, Sparks, Nevada 89434 lPhone: 800-443-6614 lviaseating.com
table of contents
33A/35A 4u forward tilt height adjustable arm with rotating and front/back adjustable cap
51A/52A/53A adjustable height arm with 4-ways adjustable cap option
38A height adjustable arm
35C control mechanism
39A height adjustable roll back arm
67C control mechanism
67CSS with optional FT control mechanism
68C control mechanism
74C control mechanism
4U upholstered integrated adjustable lumbar support
LS4B Adjustable lumbar support User guide pg. 11
pg. 10
pg. 9
pg. 8
pg. 7
pg. 6
pg. 5
pg. 4
pg. 3
pg. 2
pg. 1

4u
user guide
775 331 6001
[e-mail]
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1
Arm cap slide: Grasp and
slide arm cap forward or
backward, sliding forward
a max of 2.5”.
Adjust arm height adjustment:
While pressing the “arm button”,
use your hand to raise and lower
the arm height.
Arm
Button
Arm
Button
Arm cap rotation: Grasp
and lift arm cap to turn left
or right, rotating a max of
15° each way.
33A/35A 4u forward tilt height adjustable arm with rotating and front/back adjustable cap

4u
user guide
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2
Switch
(Lever)
Arm height adjustment
(Only applies to 38A): While
pressing the “button”, use
your hand to raise and lower
the arm height.
Optional arm width adjustment
(Only applies to 19AB): Push the
“switch” located beneath the arm
forward. Use your hand to grasp
the arm and adjust out to desired
width away from seat Each arm
adjusts separately. When nished
making adjustments, push the
switch back to its original position.
38A height adjustable arm
Arm
Button
Arm
Button

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3
4u
user guide
Roll back arm feature: while
pressing and holding the small
“button” toward the top front
on the silver circle, grasp the
arm and roll back to horizontal
position. Repeat to lift back to
upright position.
Arm height adjustment: While
pressing the “button”, use your
hand to raise and lower the arm
height.
39A height adjustable roll back arm
Arm
Button
Arm
Button
Arm
Button

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4
Additional Width Adjust-
ment(Only applies to 19AB):
Pull back on the “levers” under
the arms to unlock and extend
the arms outwards. Push forward
on the levers to lock.
To put them back to normal
simply just do the opposite.
Unlock (pull back on the lever)
and push the arms back in to
place, and lock the arms by
pushing the lever forward.
Arm height adjustment:
While lifting up on the
small “switch”, use your
hand grasping the arm
cap to raise and lower the
arm height.
51A/52A/53A adjustable height arm with 4-ways adjustable cap option
Switch
(Lever)
Switch
(Lever)
Switch
(Lever)
Arm cap slide: Grasp
and slide arm cap
forward or backward,
sliding forward a max
of 2.5”.
Arm cap rotation: Grasp
and lift arm cap to turn left
or right, rotating a max of
15° each way.
4u
user guide

35C stool control mechanism
Push the
button
Push the
button
Seat height adjustment: Adjust
the seat height by lifting your
weight out of the chair and
pulling up on the “paddle”.
Proper seat height is realized
when the top of your legs are
somewhat parallel to the oor.
Back lock adjustment (single
position): Use the same paddle
as you use for the seat height
adjustment. To lock the chair in
an upright position, shift your
weight forward until the chair
is in an upright position, then
push the “button” in. To rock
(free oat) shift your weight
forward and push the button
again.
Pull up
on paddle
Unlock foot ring: press down on the
plastic “inner hub” and lift the foot
ring up to unlock it. Adjust foot ring
to desired position.
Lock foot ring: lock foot ring in
place by pressing down on “outer
foot rest” until hub is in “locked”
position.
Foot ring adjustment
35C with 11DR/11XDR
Press down
inner hub
Press down
on foot rest
Foot rest
Inner hub
Pull up
on paddle
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4u
user guide

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4u
user guide
Right
knob
Left
knob
Seat height adjustment:
Adjust the seat height by
lifting your weight out of the
chair and pulling up on the
“paddle”. Proper seat height
is realized when the top
of your legs are somewhat
parallel to the oor.
Single rotation back tilt lock
adjustment (5 position): Tilt the
seat back to desired angle and
twist the “right knob” slightly.
To unlock, twist the other way,
leaning back to unlock. The turn
is smooth. All tilt lock angles
can be reached within a single
turn of the handle.
Back/recline tension adjustment:
Rotate knob right to increase tilt
tension. Rotate “left knob” left to
decrease tilt tension. Rotate within
a single rotation of the knob to
achieve any of the 7 distinct back
tension levels.
Pull up
on paddle
67C control mechanism
Pull up
on paddle

Right
knob
Left
knob
Seat height adjustment:
Adjust the seat height by
lifting your weight out of the
chair and pulling up on the
“paddle”. Proper seat height
is realized when the top
of your legs are somewhat
parallel to the oor.
Seat slider: Pull up on “paddle”
while shifting your weight forward
to move your seat forward or
backward to move your seat back.
Single rotation back tilt lock
adjustment (5 position): Tilt the
seat back to desired angle and
twist the “right knob” slightly.
To unlock, twist the other way,
leaning back to unlock. The turn
is smooth. All tilt lock angles
can be reached within a single
turn of the handle.
Back/recline tension adjustment:
Rotate knob right to increase tilt
tension. Rotate “left knob” left to
decrease tilt tension. Rotate within
a single rotation of the knob to
achieve any of the 7 distinct back
tension levels.
Pull up
on paddle
Pull up
on paddle
Pull up
on paddle
Pull up
on paddle
67CSS with optional FT control mechanism
Forward tilt adjustment (FT): Push the “paddle” in
the down position and lean back in the chair. You
will hear a click when the forward tilt mechanism
has turned on. Sit in your normal position to use
the forward tilt feature. To turn off the forward tilt
feature, lift the paddle in the up position and lean
back in the chair. You will hear a click when the
forward tilt mechanism has turned off.
Pull up
on paddle
Pull up
on paddle
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4u
user guide

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4u
user guide
68C control mechanism
Right
knob
Seat height adjustment:
Adjust the seat height by
lifting your weight out of the
chair and pulling up on the
“paddle”. Proper seat height
is realized when the top
of your legs are somewhat
parallel to the oor.
Single rotation back tilt lock
adjustment (5 position): Tilt the
seat back to desired angle and
twist the “right knob” slightly.
To unlock, twist the other way,
leaning back to unlock.
Left
knob
Back/recline tension adjustment:
Rotate knob right to increase tilt
tension. Rotate “left knob” left to
decrease tilt tension.
Optional seat slider (12SS): Pull
up on “paddle” while shifting
your weight forward to move your
seat forward or backward to move
your seat back.
Pull up
paddle
Pull up
paddle
Pull up
on paddle
Pull up
on paddle

Push the
button
Push the
button
Seat height adjustment: Adjust
the seat height by lifting your
weight out of the chair and
pulling up on the “paddle”.
Proper seat height is realized
when the top of your legs are
somewhat parallel to the oor.
Back lock adjustment (3 position):
Use the same paddle as you use
for the seat height adjustment.
To lock the chair in an upright
position, shift your weight forward
until the chair is in an upright
position, then push the “button”
in. To rock (free oat) shift your
weight forward and push the
button again.
Pull up
on paddle Pull up
on paddle
74C control mechanism
Optional seat slider (12SS): Pull
up on “paddle” while shifting
your weight forward to move your
seat forward or backward to move
your seat back.
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Pull up
paddle
4u
user guide

4U upholstered integrated adjustable lumbar support
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4u
user guide
Lumbar position adjustment: From the seated position,
use your right hand to make adjustments by engaging
the small, black lumbar “adjustment bar”. Slide the small
bar to the left to move the adjustable lumbar support up.
Slide the small bar to the right to move the adjustable
lumbar support down. The travel range is 2.5”.
Adjustment
bar
slide left = lumbar up
slide right = lumbar down

Lumbar position adjustment: From the seated position,
use a hand to make adjustments by engaging the small
lumbar “adjustment lever”. Slide the lever up to move
the lumbar support up. Slide the lever down to move
the adjustable lumbar support down.
LS4B Adjustable lumbar support User guide
Adjustment
lever
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4u
user guide