Safco Task Master 5120 Assembly Instructions, Illustrations & Parts List
4900 Industry Drive
Central Point, OR 97502
Visit us on the web:
www.ergoindemand.com
TASK MASTER® INDUSTRIAL CHAIR
(17” - 35” Range)
ASAS
AS
ASAS
TOOLS REQUIRED: 1/2" CRESCENT OR SOCKET WRENCH; SCREWDRIVER; RUBBER MALLET
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INSTRUCTIONSINSTRUCTIONS
INSTRUCTIONS
INSTRUCTIONSINSTRUCTIONS
5120
PARTS LISTPARTS LIST
PARTS LIST
PARTS LISTPARTS LIST
CODE
Base 1 5101-04
A
Q
Lower Footrest 2 5101-06
B
Q
Footrest Nut 4 5101-24
C
Q
Flat Washer 6 5147-31
D
Q
Hex Bolt 4 5101-23
E
Q
Glide 5 5101-25
F
Q
Upper Footrest 1 5118-06
G
Q
Carriage Bolt (Black) 2 5118-23
H
Q
Locking Nut 2 5118-24
I
Q
Tapered Bushing (on K) 1 5101-05
J
Q
Wavetube Assembly 1 5101-11
K
Q
Seat Assembly 1 5113-01BL
L
Q
Back Assembly 1 5113-02BL
M
Q
DESCRIPTION
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PART NO.
Check all parts against Parts List before beginning assembly.
Allow all parts to warm to room temperature prior to assembly.
Locate the HIGHER set of mounting holes on the side of the legs
1
of the (A) Base. From the bottom, slide a (B) Lower Footrest (with
the curved front facing out) up between those legs until the holes
in the footrest line up with those in the legs. Place a (C) Footrest
Nut inside the footrest, with the cupped side matching the curve
of the footrest end. Insert a (D) Flat Washer on to (E) Hex Bolt
through the hole in the base leg and the footrest, and thread it into
the footrest nut. Attach the other end of the footrest the same
way. Now tighten bolts alernately with a wrench, until both sides
are evenly tight. Do not overtighten.
Mount the second (B) Lower Footrest into the LOWER set of
2
mounting holes on the legs, using the same procedure as before.
Install a (F) Glide onto each of the legs of the base. The glides
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should fit snugly, so place a glide under a leg and tap the leg into
it with a rubber mallet. Be sure the leg is inserted completely into
the glide for proper stability. (HINT: Glides are easier to install if
they are slightly expanded. Use a blow dryer or warm water,
drying thoroughly, to expand glides.)
Position the (G) Upper Footrest over the holes on the tops of two
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of the base legs. Insert a (H) Carriage Bolt (Black) through each of
the footrest holes and through the legs. Add (D) Flat Washer and
fasten with (I) Locking Nuts on the underside of the legs; tighten
alternately with a wrench, until both sides are evenly tight. Do not
overtighten.
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Registered U.S. Patents 5,836,555; D381,823
5120-37MP: 1 of 6;
Rev. 4: 11/06 (8004.04)
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The (J) Tapered Bushing should come preassembled on (K)
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Wavetube (contact Ergo if it is not). Spread the tapered bushing
slightly (it has a split side) and slide to about halfway down
wavetube. Insert the wavetube assembly, wave surface first, into
the central hub of the base; slide it down until the tapered bushing
pops inside the hub and nests securely.
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For questions or concerns, please call
available Monday-Friday 8:00 AM to 4:30 PM (Central Time) (English-speaking operators)
Install the (L) Seat Assembly by aligning the hole on the underside
6
with the shaft of the wavetube assembly; push down firmly on seat.
Insert the stem of the (M) Back Assembly into the slot at the back
7
of the seat. Use a screwdriver to depress the push button at the
bottom of the stem and slide until the stem goes all the way
through the slot and sticks out the other side about 2". It may be
necessary to rotate the lever at the back of seat assembly
clockwise so stem will slide all the way through the slot. Rotate
the lever counterclockwise to lock the stem.
Make the final chair adjustments following the instructions on the
8
reverse side.
Ergo In Demand at 1-800-888-6024
CHAIR ADJUSTMENT INSTRUCTIONS
To maximize the ergonomic benefits of this chair, it is essential to understand how the controls function and how they affect your posture.
ADJUST THE
HEIGHT RANGE:
The wavetube gives the
chair an extra 10" of height
adjustment, providing a total
seat height range of 17" to
35". Determine the
appropriate range for the
task or tasks at hand. Place
a foot on the chair base and
lift the seat with a sharp
pull. The upper chair
assembly will disconnect
from the base. Spread the
tapered bushing and move
it along the wavetube to the
desired position (toward the
seat for lower height range,
toward the open end for
higher ranges). Do not let
any part of the bushing
extend beyond either end
of the wavetube.
ADJUST THE
FINAL HEIGHT:
The front lever under the
seat on the left side
pneumatically adjusts the
height of the seat over a
range of about 8". The
proper height should be
determined by a
combination of variables:
the height of the work
surface, the task to be
performed and your body
size. Typically, the chair
should be high enough so
your arms form a 90o angle
at the elbow or slightly
greater. This allows for
better circulation in the
shoulders and neck area
and also reduces the
amount of fatigue in the
forearms and hands. The
feet should lie flat on the
ground or footrest. To help
insure good posture,
maintain a 90o angle at the
bend of the knees.
ADJUST THE
BACK HEIGHT:
The backrest height
adjustment lever is behind
and below the seat. By
sliding the backrest
assembly up or down, you
adjust the height of the back,
which has a lumbar support
curve to it. Sit centered on
the seat. The curve in the
backrest should fit into the
small of your back. This will
reduce the pressure on the
spinal discs, especially in
the lumbar area.
ADJUST THE
BACK ANGLE:
The back angle adjustment
lever is the rear one on the
left side, under the seat.
The 22o angle adjustment
of the backrest is especially
critical for work tasks that
require leaning forward. Lift
the lever and allow the
surface of the backrest to
support the upper body
weight by positioning it to
the natural curve of the
spine. Press down on the
lever to lock into place. The
backrest hinge should tilt
freely, to help prevent
twisting of the spine.
ADJUST THE
SEAT ANGLE:
The seat angle adjustment
lever is the one on the right
side, under the seat. The
seat tilt is important for work
tasks that require leaning
forward. The 10o tilt allows
you to lean forward without
extra pressure under the
thighs. Lift the lever and
shift your weight forward
until you find a
comfortable position, then
release the lever to lock
into place.
MAINTENANCE
The pneumatic lift in the Cylinder is
permanently lubricated at the factory and
needs no further lubrication. NEVER
LUBRICATE THE PNEUMATIC LIFT. Do not
remove clip from bottom of Cylinder. Contact
Ergo immediately if clip is missing or
damaged. Clean polyurethane seat and back
with soap and water. To repair small cuts in
polyurethane, apply a few drops of quickdrying glue into the cut and press the sides
together until the glue sets.
5120-37MP: 2 of 6; Rev. 4: 11/06 (8004.04)
GENERAL SAFETY INSTRUCTIONS
Do not stand on seat.
Chair must be on level surface to ensure proper
stability.
Only use chair when fully assembled.
Never use chair if it does not perform according
to this sheet or warranty may be void.
Immediately report any problems to Ergo and
always give the manufacturer's date code
information from the label under the seat.
CAUTION: Allow for optimum support. Never try
to position Tapered Bushing below the retaining
ring at the bottom of the Wavetube. Always leave
at least 1/2" clearance between the bottom of the
Wavetube and the floor.
Ergo In Demand, Inc., Central Point, OR 97502
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