Sauder Costa 428728 User manual

sauder.com
NOTE: THIS INSTRUCTION
BOOKLET CONTAINS IMPORTANT
SAFETY INFORMATION.
PLEASE READ AND KEEP FOR
FUTURE REFERENCE.
sauder.com
CONTACT US FIRST
BEFORE MAKING ANY RETURNS TO THE STORE.
sauder.com
CONTACT US FIRST
BEFORE MAKING ANY RETURNS TO THE RETAILER.
Sauder.com
Share your journey! Lot # 548497 10/19/20
Purchased: __________________
English pg 1-44
Français pg 45-50
Español pg 51-56
L-Desk
Costa Collection | Model 428728
For all your
newfangled gadgetry.
Visit sauder.com/service to order replacement parts, view video assembly tips, or chat with a live rep.
Prefer the phone? Give us a ring at 1-800-523-3987.
Customer Service is available Monday-Friday - 8:30 a.m. to 5 p.m. EST (except holidays)

Table of Contents Assembly Tools Required
Part Identification
Hardware Identification
Hardware Usage Guide
Assembly Steps
Français
Español
Safety
Warranty
åWhile not all parts are labeled, some of the parts will have a label or an inked letter on the edge
to help distinguish similar parts from each other. Use this part identification to help identify similar parts.
Hammer
Not actual size
No. 2 Phillips Screwdriver
Tip Shown Actual Size
2-3
4-5
6
7-44
45-50
51-56
57-58
59
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Electric drill with 3/16" bit
(ONLY in indicated step)
A RIGHT END (1)
B LEFT END (1)
C BOTTOM (2)
D RIGHT UPRIGHT (1)
D24 RIGHT DRAWER SIDE (2)
D25 LEFT DRAWER SIDE (2)
D28 LARGE RIGHT DRAWER SIDE (1)
D29 LARGE LEFT DRAWER SIDE (1)
D78 LARGE DRAWER BACK (1)
D109 DRAWER BACK (2)
D707 LARGE DRAWER BOTTOM (1)
D716 DRAWER BOTTOM (2)
E LEFT UPRIGHT (1)
F BACK (2)
G LEFT MODESTY PANEL (1)
H RIGHT FRONT LEG (2)
I END MOLDING (4)
J BOTTOM MOLDING (2)
K BACK MOLDING (2)
LLONG MODESTY PANEL
MOLDING (2)
M KEYBOARD SHELF (1)
N RIGHT KEYBOARD UPRIGHT (1)
O RIGHT MODESTY PANEL (1)
P LEFT FRONT LEG (2)
Q RIGHT REAR LEG (2)
R LEFT REAR LEG (2)
SSHORT MODESTY PANEL
MOLDING (2)
T ADJUSTABLE SHELF (1)
U LEFT KEYBOARD UPRIGHT (1)
V DRAWER FRONT (2)
W LARGE DRAWER FRONT (1)
X TOP (1)
Y RETURN TOP (1)
Z RIGHT PANEL (1)
AA LEFT PANEL (1)
BB DOOR (1)
Part Identification

Part Identification Now you know
our ABCs.
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A
BC
C
D
E
F
F
G
H
H
I
II
I
J
J
K
K
L
L
M
N
O
P
P
Q
Q
R
R
S
S
T
U
V
V
W
X
Y
Z
AA
BB
D109
D109
D716
D716
D707
D24
D24
D28
D29
D78
D25
D25

Hardware Identification
40AW CABINET RIGHT - 1 40AX CABINET LEFT - 1 40AY DRAWER RIGHT - 1 40AZ DRAWER LEFT - 1
CONNECTOR PLATE - 2
14G37F TWIST-LOCK®FASTENER - 24CAM SCREW - 37 8F WOOD DOWEL - 16 15F
FILE ROD - 2
8B FILE GLIDE - 2
15B
10A SLIDE CAM - 6 HIDDEN CAM - 37
1F
(EXTENSION SET SHOWN SEPARATED)
EXTENSION
SLIDE - 2
40MC
EXTENSION
RAIL - 2
40MA
(EXTENSION SET SHOWN SEPARATED)
EXTENSION
SLIDE - 4
40NC
EXTENSION
RAIL - 4
40NA
DOOR STOP - 1
4I
14H HINGE - 2 KNOB SET - 4
136K GLUE - 2
177M
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Hardware Identification
BLACK 1-1/8" MACHINE SCREW - 4
21S18S BROWN 1" FLAT HEAD SCREW - 4
SILVER 1-1/8" FLAT HEAD SCREW - 4
10S BLACK 1/2" FLAT HEAD SCREW - 4 11S
GROMMET CAP - 1
1P CORD CLIP - 1 4P GROMMET - 1 10P
METAL PIN - 4
1R
CAM COVER - 3
75P RUBBER SLEEVE - 4
2R
BLACK 1-15/16" FLAT HEAD SCREW - 9
113S
BLACK 9/16" FLAT HEAD SCREW - 26
32S30S BLACK 1-9/16" FLAT HEAD SCREW - 12
BLACK 9/16" LARGE HEAD SCREW - 16
1S 3S GOLD 5/16" FLAT HEAD SCREW - 24
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Hardware Usage Guide
1. Insert the dowel end of the FASTENER into the
hole of the adjoining part.
NOTE: The dowel end of the FASTENER must
remain fully inserted in the hole of the adjoining
part while locking the FASTENER.
2. Tighten the FASTENER with a Phillips
screwdriver as tight as possible.
Dowel end
2.
Push a TWIST-LOCK® FASTENER
into the large hole in the part.
1.
HOW TO USE A TWIST-LOCK®FASTENER
Cam Screw
Hidden Cam
Arrow
Push a HIDDEN CAM into
the part. The arrow in the
HIDDEN CAM must point
toward the hole in the
edge of the board.
Hole
2. 3.
1
2
Insert the CAM SCREW into the HIDDEN CAM.
Tighten the HIDDEN CAM.
HOW TO USE A HIDDEN CAM & CAM SCREW
Turn the CAM SCREW until
the shoulder is against the
surface of the part.
1.
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Step 1 Look for this icon. It means a video assembly tip is
available at www.sauder.com/service/tips
Find the numbered video or scan the QR code.
428728www.sauder.com/service Page 7
2
A
B
(24 used)
37F
Do not tighten the TWIST-LOCK® FASTENERS in this step.
å Assemble your unit on a carpeted floor or on the empty carton to
avoid scratching your unit or the floor.
å To begin assembly, push a SAUDER TWIST-LOCK® FASTENER (37F)
into the large holes in the ENDS (A and B).
å Repeat this step for the BOTTOMS (C), UPRIGHTS (D and E),
MODESTY PANELS (G and O), and KEYBOARD UPRIGHTS (N and U).
STOP
If you purchased
the 428725
Hutch, assemble
that unit first.

Step 2
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A
D
B
E
å Push thirty-seven HIDDEN CAMS (1F) into the edges of the
ENDS (A and B), UPRIGHTS (D and E), BACKS (F), LEFT
MODESTY PANEL (G), and RIGHT PANEL (Z).
1F
Arrow
Arrow
1F
F
F
G
Z
(37 used)
1

Step 3
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1
H
H
P
P
Q
Q
R
R
Z
AA
8F
8F
å Turn thirty-seven CAM SCREWS (8F) into the
LEGS (H, P, Q and R) and PANELS (Z and AA).
(37 used)

Step 4
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å Turn the ENDS (A and B), UPRIGHTS (D and E), and BACKS (F) over.
å Turn twelve BLACK 9/16" FLAT HEAD SCREWS (32S) into the ENDS (A and B),
UPRIGHTS (D and E), and BACKS (F) until the shoulders of the SCREWS rest on the
surfaces of the ENDS, UPRIGHTS, and BACKS.
å NOTE: Do not overtighten the SCREWS.
å Slide the MOLDINGS (I) onto the ENDS (A and B) and UPRIGHTS (D and E). Slide the
MOLDINGS (K) onto the BACKS (F). Line up the grooves in the MOLDINGS over the
heads of the SCREWS in the ENDS, UPRIGHTS, and BACKS.
å NOTE: If the MOLDING comes up o of the SCREWS, remove it and slide it on again.
The MOLDINGS should be centered over the ENDS, UPRIGHTS, and BACKS.
BLACK 9/16" FLAT HEAD SCREW
(12 used in this step)
32S
Shoulder
Apply pressure with your hands as you
guide the MOLDINGS over the SCREWS
and onto the ENDS, UPRIGHTS, and BACKS.
A
B
D
E
F
Surface
without
HIDDEN
CAMS
F
Surface
without
HIDDEN
CAMS
Surface without
HIDDEN CAMS Surface without
HIDDEN CAMS
Surface without
HIDDEN CAMS
Surface without
HIDDEN CAMS
K
I
I
K
I
I
Shoulder

Step 5
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Shoulder
Apply pressure with your hands as you
guide the MOLDINGS over the SCREWS
and onto the ENDS, UPRIGHTS, and BACKS.
Shoulder
Apply pressure with your hands as you
guide the MOLDINGS over the SCREWS
and onto the ENDS, UPRIGHTS, and BACKS.
å Turn six BLACK 9/16" FLAT HEAD SCREWS (32S) into the MODESTY
PANELS (G and O) until the shoulders of the SCREWS rest on the
surfaces of the MODESTY PANELS.
å NOTE: Do not overtighten the SCREWS.
å Slide the SHORT MODESTY PANEL MOLDINGS (S) onto the
MODESTY PANELS (G and O). Line up the grooves in the MOLDINGS
over the heads of the SCREWS in the MODESTY PANELS.
å NOTE: If the MOLDINGS come up o of the SCREWS, remove them
and slide them on again. The MOLDINGS should be centered over the
MODESTY PANELS. BLACK 9/16" FLAT HEAD SCREW
(6 used in this step)
32S
G
O
S
S
Surface without TWIST-LOCK® FASTENERS
Surface without TWIST-LOCK® FASTENERS
Some assembly
(and snacks) required.

Step 6
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å Flip the the MODESTY PANELS (G and O) over.
å Turn eight BLACK 9/16" FLAT HEAD SCREWS (32S) into the MODESTY PANELS (G and O) until the shoulders of the
SCREWS rest on the surfaces of the MODESTY PANELS.
å NOTE: Do not overtighten the SCREWS.
å Slide the LONG MODESTY PANEL MOLDINGS (L) onto the MODESTY PANELS (G and O). Line up the groove in the
MOLDING over the heads of the SCREWS in the MODESTY PANEL.
å NOTE: Be sure the MOLDINGS are positioned exactly as shown. If the MOLDINGS come up o of the SCREWS, remove
them and slide them on again. The MOLDINGS should be centered over the MODESTY PANELS.
G
O
Apply pressure with your hands as you
guide the MOLDINGS over the SCREWS
and onto the ENDS, UPRIGHTS, and BACKS.
Apply pressure with your hands as you
guide the MOLDINGS over the SCREWS
and onto the ENDS, UPRIGHTS, and BACKS.
Shoulder
Shoulder
L
L
Angled edge
Angled edge
BLACK 9/16" FLAT HEAD SCREW
(8 used in this step)
32S

Step 7
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15F
Surface with
TWIST-LOCK®
FASTENERS
Edge with
TWIST-LOCK®
FASTENERS End without hole
End without hole
A
Q
H
å First, fill two holes in the RIGHT END (A) 1/4 to 1/2 full with GLUE (177M). Then,
insert two WOOD DOWELS (15F) into the holes. Wipe away the excess GLUE.
å NOTE: Be sure to position the parts exactly as shown and use the correct holes.
å Now, fill the holes in the LEGS (H and Q) 1/4 to 1/2 full with GLUE (177M).
å Fasten the LEGS (H and Q) to the RIGHT END (A). Tighten six HIDDEN CAMS.
å NOTE: Be sure the WOOD DOWELS in the RIGHT END insert into the LEGS.
Wipe away the excess GLUE.
177M
Fill the holes 1/4 to 1/2 full with GLUE.
Inspect the parts thoroughly before
assembling. Disassembly of glued
parts is extremely dicult.
Caution
!
These surfaces
should be even.
1

Step 8
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Surface with
TWIST-LOCK®
FASTENERS
15F
Edge with
TWIST-LOCK®
FASTENERS
End with hole
å First, fill two holes in the LEFT END (B) 1/4 to 1/2 full with GLUE (177M). Then,
insert two WOOD DOWELS (15F) into the holes. Wipe away the excess GLUE.
å NOTE: Be sure to position the parts exactly as shown and use the correct holes.
å Now, fill the holes in the LEGS (P and R) 1/4 to 1/2 full with GLUE (177M).
å Fasten the LEGS (P and R) to the LEFT END (B). Tighten six HIDDEN CAMS.
å NOTE: Be sure the WOOD DOWELS in the LEFT END insert into the LEGS. Wipe
away the excess GLUE.
End with hole
15F
B
R
P
177M
Fill the holes 1/4 to 1/2 full with GLUE.
Inspect the parts thoroughly before
assembling. Disassembly of glued
parts is extremely dicult.
Caution
!
1
These surfaces
should be even.

Step 9
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177M
Fill the holes 1/4 to 1/2 full with GLUE.
Inspect the parts thoroughly before
assembling. Disassembly of glued
parts is extremely dicult.
Caution
!
1
E
15F
Edge with
TWIST-LOCK®
FASTENERS
End without hole
End without hole
å First, fill two holes in the LEFT UPRIGHT (E) 1/4 to 1/2 full with GLUE (177M). Then,
insert two WOOD DOWELS (15F) into the holes. Wipe away the excess GLUE.
å NOTE: Be sure to position the parts exactly as shown and use the correct holes.
å Now, fill the holes in the LEGS (H and Q) 1/4 to 1/2 full with GLUE (177M).
å Fasten the LEGS (H and Q) to the LEFT UPRIGHT (E). Tighten six HIDDEN CAMS.
å NOTE: Be sure the WOOD DOWELS in the LEFT UPRIGHT insert into the LEGS.
Wipe away the excess GLUE.
Q
H
These surfaces
should be even.

Step 10
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177M
Fill the holes 1/4 to 1/2 full with GLUE.
Inspect the parts thoroughly before
assembling. Disassembly of glued
parts is extremely dicult.
Caution
!
1
Surface with
TWIST-LOCK®
FASTENERS
15F
Edge with
TWIST-LOCK®
FASTENERS
End with hole
å First, fill two holes in the RIGHT UPRIGHT (D) 1/4 to 1/2 full with GLUE (177M).
Then, insert two WOOD DOWELS (15F) into the holes. Wipe away the excess GLUE.
å NOTE: Be sure to position the parts exactly as shown.
å Now, fill the holes in the LEGS (P and R) 1/4 to 1/2 full with GLUE (177M).
å Fasten the LEGS (P and R) to the RIGHT UPRIGHT (D). Tighten six HIDDEN CAMS.
å NOTE: Be sure the WOOD DOWELS in the RIGHT UPRIGHT insert into the
LEGS. Wipe away the excess GLUE.
End with hole
15F
R
P
D
These surfaces
should be even.

Step 11
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å Separate the EXTENSION SLIDES (40MC) from the EXTENSION RAILS (40MA) as shown in the upper diagram below. Be
prepared, the parts are greasy.
å Fasten the EXTENSION RAILS (40MA) to the LEFT END (B) and LEFT UPRIGHT (E). Use four GOLD 5/16" FLAT HEAD
SCREWS (3S) through holes #1 and #3.
å NOTE: For each EXTENSION RAIL, turn a SCREW into the hole shown in the enlarged diagram. Then, slide the inner
cartridge of the EXTENSION RAIL in to find the other hole that lines up with the hole in the END and UPRIGHT. Turn a
SCREW into this hole.
å NOTE: The EXTENSION SLIDES will be used later for the LARGE DRAWERS.
Open end
B
E
Edge with
TWIST-LOCK®
FASTENERS
Surface with
TWIST-LOCK®
FASTENERS
Surface with
TWIST-LOCK®
FASTENERS
Open end
P
H
1
3
2
4
1
3
2
4
Push the black lever in and pull the SLIDE from the RAIL.
40MA40MC
7
GOLD 5/16" FLAT HEAD SCREW
(4 used in this step)
3S

Step 12
428728 www.sauder.com/servicePage 18
B
E
å Separate the EXTENSION SLIDES (40NC) from the EXTENSION RAILS (40NA) as shown in the upper diagram below. Be
prepared, the parts are greasy.
å Fasten four EXTENSION RAILS (40NA) to the LEFT END (B) and LEFT UPRIGHT (E). Use eight GOLD 5/16" FLAT HEAD
SCREWS (3S) through holes #1 and #3.
å NOTE: For each EXTENSION RAIL, turn a SCREW into the hole shown in the enlarged diagram. Then, slide the inner
cartridge of the EXTENSION RAIL in to find the other hole that lines up with the hole in the END and UPRIGHT. Turn a
SCREW into this hole.
å NOTE: The EXTENSION SLIDES will be used later for the SMALL DRAWERS.
Open end
Open end
1
3
2
4
1
3
2
4
1
3
2
4
1
3
2
4
3
4
Push the black lever in and pull the SLIDE from the RAIL.
40NA40NC
7
GOLD 5/16" FLAT HEAD SCREW
(8 used in this step)
3S

Step 13
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å Fasten the BACKS (F) to the ENDS (A and B). Tighten four
HIDDEN CAMS.
Surface with HIDDEN CAMS
Surface with HIDDEN CAMS
The BACK
MOLDINGS (K)
should be here.
BA
FF
1

Step 14
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A
B
å Fasten the BOTTOMS (C) to the ENDS (A and B).
Tighten four TWIST-LOCK® FASTENERS.
å Slide the BOTTOM MOLDINGS (J) onto the notched
edges of the BOTTOMS (C).
The groove should be
closer to this edge.
CC
J
J
Surface with
TWIST-LOCK®
FASTENERS
Surface with
TWIST-LOCK®
FASTENERS
2
Notched edgeNotched edge
The groove should be
closer to this edge.