Weider 831.159821 User Manual
USER'S MANUAL
CAUTION
Read all precautions and instructions in this manual before using
this equipment. Save this manual
for future reference.
Model No. 831.159821
Serial No.
Write the serial number in the
space above for reference.
Serial Number Decal (under seat)
Visit our website at
www.weiderfitness.com
new products, prizes,
fitness tips, and much more!
SEARS, ROEBUCK AND CO.
HOFFMAN ESTATES, IL 60179
2
IMPORT ANT PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
BEFORE YOU BEGIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
WEIGHT RESISTANCE CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
CABLE DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
EXERCISE GUIDELINES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .26
ORDERING REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Back Cover
FULL 90 DAY WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back Cover
Note: A PART IDENTIFICATION CHART and a PART LIST/EXPLODED DRAWING are attached in the center of
this manual. Remove the PART IDENTIFICATION CHART and the PART LIST/EXPLODED DRAWING before
beginning assembly.
TABLE OF CONTENTS
3
1. Read all instructions in this manual and in
the accompanying literature before using the
weight system. Use the weight system only
as described in this manual.
2. It is the responsibility of the owner to ensure
that all users of the weight system are adequately informed of all precautions.
3. The weight system is intended for home use
only. Do not use the weight system in a commercial, rental, or institutional setting.
4. Use the weight system only on a level surface. Cover the floor or carpet beneath the
weight system to protect the floor.
5. Make sure all parts are properly tightened
each time the weight system is used.
Replace any worn parts immediately.
6. Keep children under the age of 12 and pets
away from the weight system at all times.
7. Keep hands and feet away from moving parts.
8. Always wear athletic shoes for foot protection when using the weight system.
9. The weight system is designed to support a
maximum user weight of 300 pounds.
10. Never release the press arm, butterfly arms,
leg lever, leg press base, lat bar, ab strap, or
handle while weights are raised; the weights
will fall with great force.
11. Make sure that the cables remain on the pulleys at all times. If the cables bind while you
are exercising, stop immediately and make
sure that the cables are on all of the pulleys.
12. Always stand on the foot plate when performing an exercise that could cause the
weight system to tip.
13. Always disconnect the lat bar from the
weight system when performing an exercise
that does not use the lat bar.
14. If you feel pain or dizziness at any time while
exercising, stop immediately and begin cooling down.
15. The warning decals
shown here have been
placed on the weight
system in the locations
shown on page 4. If a
decal is missing or
illegible, please call
our toll-free HELPLINE
at 1-800-736-6879,
Monday through
Saturday, 7 a.m. until
7 p.m. Central Time, to
order a free replacement decal. Place the
decal on the weight
system in the location shown.
WARNING:To reduce the risk of serious injury, read the following important precau-
tions before using the weight system.
WARNING:Before beginning this or any exercise program, consult your physician. This
is especially important for persons over the age of 35 or persons with pre-existing health problems.
Read all instructions before using. SEARS assumes no responsibility for personal injury or property
damage sustained by or through the use of this product.
Keep hands and
fingers clear of
this area.
IMPORTANT PRECAUTIONS
Decal 1
Decal 2
4
BEFORE YOU BEGIN
ASSEMBLED
DIMENSIONS:
Height: 77 in.
Width: 81 in.
Length: 59 in.
Foot Plate
Low Pulley
Station
Ab Pulley
Station
High Pulley Station
Lat Bar
Leg Lever
Butterfly Arm
/Press Arm
Weight
Seat
Seat
Backrest
Backrest
Leg Press
Plate
Thank you for selecting the versatile WEIDER®PRO
4100 weight system. The PRO 4100 weight system
offers a selection of weight stations designed to develop every major muscle group of the body. Whether
your goal is to tone your body, build dramatic muscle
size and strength, or improve your cardiovascular system, the weight system will help you to achieve the
results you want.
For your benefit, read this manual carefully before
using the weight system. If you have additional
questions, please call our toll-free HELPLINE at
1-800-736-6879, Monday through Saturday, 7 a.m.
until 7 p.m. Central Time (excluding holidays). To help
us assist you, please note the product model number
and serial number before calling. The model number is
831.159821. The serial number can be found on a
decal attached to the weight system (see the front
cover of this manual).
Before reading further, please review the drawing
below and familiarize yourself with the parts that are
labeled.
Warning
Decal 1
Warning Decal 2
(One on each side
of the right upright.)
Note: The terms “right side” and “left side” are determined relative to a person facing away from the weight system; they do
not correspond to right and left in the pictures in the manual.
Right Side
Left Side
75
5
Before beginning assembly, carefully read the
following information and instructions:
• Assembly requires two people.
• Place all parts in a cleared area and remove the
packing materials. Do not dispose of the packing
materials until assembly is completed.
• T ighten all parts as you assemble them, unless
instructed to do otherwise.
• As you assemble the weight system, make sure
all parts are oriented as shown in the drawings.
• For help identifying small parts, use the P
ART
IDENTIFICATION CHART.
An Allen wrench (included) and the following
tools (not included) are required for assembly:
• two adjustable wrenches
• one rubber mallet
• one standard screwdriver
• one Phillips screwdriver
• lubricant, such as grease or petroleum jelly,
and soapy water.
Assembly will be more convenient if you have a
socket set, a set of open-end or closed-end
wrenches, or a set of ratchet wrenches.
Make Things Easier for Yourself
Everything in this manual is designed to ensure
that the weight system can be assembled successfully by anyone. However, it is important to
realize that the versatile weight system has
many parts and that the assembly process will
take time. Most people find that by setting aside
plenty of time, assembly will go smoothly.
ASSEMBLY
1
33
33
81
67
1
70
81
67
28
75
75
57
57
1. Before beginning assembly, be sure that you
have read and understand the information in
the box above.
Attach the Base Cap (28) to the Right Base (1)
with an M4 x 20mm Self-tapping Screw (77) and
an M5 Washer (50).
Attach the Center Base (67) to the Right Base (1)
with two M10 x 70mm Bolts (81), two M10
Washers (75), and two M10 Nylon Locknuts (70).
Do not tighten the Locknuts yet.
Insert four M10 x 65mm Carriage Bolts (57) up into
the Right Base (1).
2. Press two 50mm Square Inner Caps (33) into the
ends of the Left Base (2).
Insert four M10 x 65mm Carriage Bolts (57) up into
the Left Base (2).
Attach the Left Base (2) to the Right Base (1) and
Center Base (67) with three M10 x 70mm Bolts
(81), three M10 Washers (75), and three M10
Nylon Locknuts (70).
Tighten the M10 Nylon Locknuts (70) used in
steps 1 and 2.
FRAME ASSEMBLY
2
1
2
81
70
57
77
50
75
57
6
4. Press a 50mm x 70mm Inner Cap (22) into the
top of the Right Leg (73).
Attach the Right Leg (73) to the Right Base (1)
with the two M10 x 65mm Carriage Bolts (57) and
two M10 Nylon Locknuts (70).
Attach the Right Upright (6) to the Right Base (1)
with the two indicated M10 x 65mm Carriage
Bolts (57) and two M10 Nylon Locknuts (70).
Do not tighten the M10 Nylon Locknuts (70)
yet.
3. Attach the Base Plate (37) to the Left Base (2)
with an M10 x 135mm Bolt (58) and an M10
Nylon Locknut (70). Be sure that the texture
side is on top.
Attach the Left Upright (7) to the Left Base (2)
with the two indicated M10 x 65mm Carriage
Bolts (57) and two M10 Nylon Locknuts (70).
Attach the Left Leg (36) to the Left Base (2) with
the two indicated M10 x 65mm Carriage Bolts
(57) and two M10 Nylon Locknuts (70). Be sure
the large upper hole in the Left Leg is on the
side shown.
Do not tighten the M10 Nylon Locknuts (70)
yet.
3
4
2
57
70
6
1
73
22
36
Large
Hole
7
70
57
57
37
70
58
70
70
70
70
70
70
57
7
7. Set two Weight Bumpers (83) over the indicated
holes in the Center Base (67). Insert the two
Weight Guides (20) into the holes. Attach the
Weight Guides to the Center Base with two M10 x
65mm Bolts (63), four M10 Washers (75), and
two M10 Nylon Locknuts (70).
75
75
75
75
73
70
6
5
60
60
70
5
70
70
83
83
75
75
75
63
75
67
20
7
6. Press a 50mm Square Inner Cap (33) into the
end of the Left Seat Frame (29).
Attach the Left Seat Frame (29) to the Left Leg
(36) with two M10 x 65mm Carriage Bolts (57)
and two M10 Nylon Locknuts (70).
Attach the Left Seat Frame (29) to the Left
Upright (7) with two M10 x 85mm Bolts (60), two
M10 Washers (75), and two M10 Nylon Locknuts
(70).
Do not tighten the M10 Nylon Locknuts (70)
yet.
33
75
75
36
70
70
60
29
60
7
70
6
57
5. Attach the Right Seat Frame (5) to the Right Leg
(73) with two M10 x 85mm Bolts (60), two M10
Washers (75), and two M10 Nylon Locknuts (70).
Attach the Right Seat Frame (5) to the Right
Upright (6) with two M10 x 85mm Bolts (60), two
M10 Washers (75), and two M10 Nylon Locknuts
(70).
Do not tighten the M10 Nylon Locknuts (70)
yet.
8
10. Press a 50mm x 70mm Inner Cap (22) into the
end of the Right Top Frame (8).
Attach the Right T op Frame (8) to the Right
Upright (6) with two M10 x 90mm Bolts (59), a
Support Plate (21), and two M10 Nylon Locknuts
(70).
Attach the Right T op Frame (8) to the Left Top
Frame (3) with two M10 x 70mm Bolts (81), two
M10 Washers (75), and two M10 Nylon Locknuts
(70).
Do not tighten the M10 Nylon Locknuts (70)
yet.
9. Press two 50mm x 70mm Inner Caps (22) into
the ends of the Left Top Frame (3).
Attach the Left T op Frame (3) to the Left Upright
(7) with two M10 x 90mm Bolts (59), a Support
Plate (21), and two M10 Nylon Locknuts (70). Do
not tighten the Locknuts yet.
8. Slide the eight Weights (72) onto the Weight
Guides (20) with the pin grooves on the side
shown.
Press the Weight Tube Bumper (32) into the bottom of the Weight Tube (82). Insert the Weight
Tube into the center hole in the stack of Weights
(72). Be sure the Weight Tube is oriented as
shown.
Lubricate the indicated holes in the T op Weight
(74). Slide the T op Weight onto the Weight
Guides (20), with the pin groove on the bottom.
72
32
74
20
82
8
Lubricate
Pin
Groove
Holes
22
70
70
59
3
21
22
7
9
6
59
22
70
70
70
3
75
81
8
21
10
9
13. Lubricate an M10 x 50mm Bolt (62) with grease.
Attach the Pivot Bracket (48) to the Right Butterfly
Arm (11) with the Bolt and an M10 Nylon Locknut
(70). Do not overtighten the Locknut; the Pivot
Bracket must be able to pivot easily.
Press a 40mm x 50mm Inner Cap (23) into the
indicated end of the Right Butterfly Arm (11). Wet
the bottom end of the Arm with soapy water. Slide
a Large Foam Pad (19) onto the Arm.
Slide a Foam Grip (76) onto a Press Handle (12).
Press a 25mm Round Inner Cap (24) into the end
of the Handle. Attach the Handle to the Right
Butterfly Arm (11) with two M8 x 16mm Bolts (64)
and two M8 Washers (26).
Slide the Large Foam Pad (19) down so that the
bottom of the Foam Pad is even with the bottom
of the Right Butterfly Arm (11).
Repeat this step with the Left Butterfly Arm
(10).
11. Press the two Weight Guide Bushings (44) into
the Center T op Frame (14). Slide the Center Top
Frame onto the Weight Guides (20).
Attach the Center T op Frame (14) to the Right
T op Frame (8) with two M10 x 70mm Bolts (81),
two M10 Washers (75), and two M10 Nylon
Locknuts (70).
Attach the Center T op Frame (14) to the Left Top
Frame (3) with two M10 x 70mm Bolts (81), two
M10 Washers (75), and two M10 Nylon Locknuts
(70).
Tighten all of the M10 Nylon Locknuts (70)
used in steps 3–11.
75
75
75
70
70
14
8
3
44
20
81
81
70
70
11
22
41
70
8
6
9
61
Lubricate
12
64
26
26
64
76
19
10
12
11
70
48
62
24
23
13
12. Press a 38mm Square Inner Cap (41) into the
Right Upright (6). Press a 50mm x 70mm Inner
Cap (22) into the Butterfly Frame (9).
Lubricate an M10 x 80mm Bolt (61) with grease.
Attach the Butterfly Frame (9) to the Right T op
Frame (8) with the Bolt and an M10 Nylon Locknut
(70). Do not overtighten the Locknut; the
Butterfly Frame must be able to pivot easily.
ARM ASSEMBLY
Lubricate
10
16. Press a 50mm x 70mm Inner Cap (22) into the
top of the Leg Press Frame (30).
Lubricate an M10 x 80mm Bolt (61) with grease.
Attach the Leg Press Frame (30) to the Left Base
(2) with the Bolt and an M10 Nylon Locknut (70).
Do not overtighten the Locknut; the Leg Press
Frame must be able to pivot easily.
14. Lubricate an M10 x 80mm Button Head Bolt (97)
and both sides of two Plastic Washers (55) with
grease. Attach the Right Butterfly Arm (11) to the
Butterfly Frame (9) with the Bolt, the two Plastic
Washers, two Butterfly Caps (54), and an M10
Nylon Locknut (70). Do not overtighten the
Locknut; the Butterfly Arm must be able to
pivot easily. Be sure the indented sides of the
Plastic Washers fit over the welded bushing in
the Butterfly Arm.
Repeat this step with the Left Butterfly Arm
(10).
9
10
11
97
54
54
55
55
Lubricate
Welded
Bushing
Lubricate
70
14
23
Lubricate
23
63
70
4
73
25
77
50
15
2
22
70
61
30
16
15. Attach the Bumper (25) to the Right Leg (73) with
an M4 x 20mm Self-tapping Screw (77) and an
M5 Washer (50).
Press two 40mm x 50mm Inner Caps (23) into
the ends of the Leg Lever (4).
Lubricate an M10 x 60mm Bolt (63) with grease.
Attach the Leg Lever (4) to the Right Leg (73)
with the Bolt and an M10 Nylon Locknut (70). Do
not overtighten the Locknut; the Leg Lever
must be able to pivot easily.
Lubricate
11
20. Note: The following drawings are shown from
the left side of the weight system, with the
Left Top Frame (3) removed for clarity.
Wrap the High Cable (45) around a 90mm Pulley
(38). Attach the Pulley at the rear hole, inside of
the bracket on the Center Top Frame (14) with an
M10 x 45mm Bolt (66) and an M10 Nylon Locknut
(70).
17.
Locate the High Cable (45). Route the Cable up
through the Left T op Frame (3) and around a
90mm Pulley (38). Attach the Pulley inside the
T op Frame with an M10 x 70mm Bolt (81), two
M10 Washers (75), two 13mm Spacers (34), and
an M10 Nylon Locknut (70).
18. Route the High Cable (45) around a 90mm Pulley
(38) and down through the Left T op Frame (3).
Attach the Pulley and a Cable Trap (91) inside
the T op Frame with an M10 x 70mm Bolt (81),
two M10 Washers (75), two 13mm Spacers (34),
and an M10 Nylon Locknut (70). Be sure the
Cable Trap is turned to hold the Cable in the
groove of the Pulley.
Note: To complete this step, it may be necessary to loosen the indicated M10 Nylon
Locknuts (70). Retighten the Locknuts when
this step is completed.
19. Wrap the High Cable (45) around a 90mm Pulley
(38). Attach the Pulley to the single hole side of a
Double “U”-Bracket (56) with an M10 x 45mm
Bolt (66) and an M10 Nylon Locknut (70).
38
45
75
70
81
75
34
3
34
17
3
34
75
34
75
81
38
70
71
91
45
18
70
56
38
66
45
19
38
66
70
45
14
20
CABLE ASSEMBLY
IMPORT ANT: While assembling the cables, do
not over tighten the locknuts attaching the pulleys; the pulleys must be able to turn freely.
Refer to the CABLE DIAGRAMS and CABLE ID
CHART on pages 24 and 25 for proper cable
routing and help identifying the cables.
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