Weider 831.159831 User Manual
USER’S MANUAL
Model No. 831.159831
Serial No.
The serial number is found in the
location shown below. Write the
serial number in the space above.
CAUTION
Read all precautions and instructions in this manual before using
this equipment. Save this manual for future reference.
Serial
Number
Decal
Patent Pending
SEARS, ROEBUCK AND CO.
HOFFMAN ESTATES, IL 60179
Visit our website at
www.weiderfitness.com
new products, prizes,
fitness tips, and much more!
2
TABLE OF CONTENTS
IMPORTANT PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
BEFORE YOU BEGIN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
ASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
WEIGHT RESISTANCE CHART . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
TROUBLESHOOTING AND MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
CABLE DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
ORDERING REPLACEMENT PARTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back Cover
FULL 90 DAY WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Back Cover
Note: A PART LIST/EXPLODED DRAWING and a PAR T IDENTIFICATION CHART are attached in the center of
this manual. Remove the PAR T LIST/EXPLODED DRAWING and the PAR T IDENTIFICATION CHART before
beginning assembly.
3
IMPORTANT PRECAUTIONS
WARNING: To reduce the risk of serious injury, read the following important precautions
before using the weight system.
1. Read all instructions in this manual and in
the accompanying literature before using the
weight system.
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 any
commercial, rental, or institutional setting.
4. Use the weight system only on a level surface. Cover the floor beneath the weight system to protect the floor.
5. Make sure all parts are properly tightened
each time you use the weight system.
Replace any worn parts immediately.
6. Keep children under 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.
9. The weight system is designed to support a
a maximum user weight of 250 pounds.
10. Always stand on the foot plate when performing an exercise that could cause the
weight system to tip.
11. Never release the press arm, butterfly arms,
leg lever, press plate, lat bar, ab strap, or
nylon strap while weights are raised; the
weights will fall with great force.
12. Always disconnect the lat bar from the
weight system when performing an exercise
that does not use the lat bar.
13. 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.
14. If you feel pain or dizziness at any time while
exercising, stop immediately and begin cooling down.
15. The decal shown here
has been placed on the
weight system in the
location shown on page
4. If the decal is missing
or illegible, please call
our toll-free HELPLINE at
the number on the front
cover of this manual to
order a replacement
decal. Apply the new
decal in the indicated
location.
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.
4
ASSEMBLED
DIMENSIONS:
Height: 77 in.
Width: 80 in.
Depth: 55 in.
Low Pulley
Station
Foot Plate
Leg Lever
Press Arm
Backrest
Curl Pad
Butterfly Arm
Ab Pulley
Station
Weight Stack
Leg Press Lever
Thank you for selecting the innovative and versatile
WEIDER®PRO POWER STACK weight system. The
POWER STACK offers a unique 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 POWER
STACK will help you to achieve the results you want.
For your benefit, read this manual carefully before
using the POWER STACK 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 831.159831. The serial number
can be found on a decal attached to the weight system
(see the front cover of this manual).
Please use the drawing below to familiarize yourself with the major parts and how they fit together.
Seat
Leg Press
Backrest
Seat
High Pulley
Station
Warning
Decal
Lat Bar
BEFORE YOU BEGIN
5
Make sure you have the following tools:
• Two adjustable wrenches
• One standard screwdriver
• One phillips screwdriver
• One rubber mallet
• You will also need grease or petroleum jelly, a
small amount of soapy water, and clear tape or
masking tape.
Note: 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.
How to Identify Parts
To help you identify the small parts used in assembly,
we have included a PAR T IDENTIFICATION CHART
in the center of this manual. Place the chart on the
floor and use it to easily identify parts during each
assembly step. Note: Some small parts may have
been pre-attached. If a part is not in the parts
bag, check to see if it has been pre-attached.
How to Orient Parts
As you assemble the weight system, make sure that
all parts are oriented exactly as shown in the drawings.
Tightening Parts
Tighten all parts as you assemble them, unless
instructed to do otherwise.
Questions?
If you have questions after reading the assembly
instructions, 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).
Assembly Requires Two Persons
For your convenience and safety, assemble the
weight system with the help of another person.
Set Aside Enough Time
Due to the many features of the weight system, the
assembly process will require several hours. By
setting aside plenty of time and by deciding to
make the task enjoyable, assembly will go smoothly.
You may want to assemble the weight system over
a couple of evenings.
Select a Location for the Weight System
Because of its weight and size, the weight system
should be assembled in the location where it will be
used. Make sure that there is enough room to walk
around the weight system as you assemble it.
How to Unpack the Box
To make assembly as easy as possible, we have
divided the assembly process into four stages. The
parts needed for each stage are found in individual
bags. Important: Wait until you begin each stage
to open the parts bag for that stage. Place all
parts of the weight system in a cleared area and
remove the packing materials. Do not dispose of
the packing materials until assembly is completed.
Make Assembly Easier for Yourself
Everything in this manual is designed to
ensure that the weight system can be assembled successfully by anyone. Before begin-
ning assembly, make sure to read the
information on this page. This brief introduction will save you much more time than
it takes to read it.
The Four Stages of the Assembly Process
Frame Assembly—You will begin by assembling
the base and the uprights that form the skeleton of
the weight system.
Arm Assembly—During this stage you will
assemble the arms and the leg lever.
Cable Assembly—During this stage you will
attach the cables and pulleys that connect the
arms to the weights.
Seat Assembly—During the final stage you will
assemble the seats and the backrests.
ASSEMBLY
1. Before beginning, be sure that you have read
and understood the information on page 5.
Locate and open the parts bag labeled
“FRAME ASSEMBLY.”
Press a 2” Square Inner Cap (67) into each end
of the Butterfly Base (1).
Insert four 5/16” x 2 1/2” Carriage Bolts (75) and a
a 3/8” x 3 1/2” Carriage Bolt (95) up through the
indicated holes in the Butterfly Base (1). Place the
Butterfly Base flat on the floor. Note: If the Bolts
fall out, secure them by putting a small piece of
tape over the head of each Bolt.
2. Press three 2” Square Inner Caps (67) into the
Center Base (2). Insert a 3/8” x 3 1/2” Carriage
Bolt (95) up through the indicated hole in the
Center Base.
Attach the Center Base (2) to the Butterfly Base (1)
with two 5/16” x 2 3/4” Bolts (89), a Medium
Support Plate (109), and two 5/16” Nylon Locknuts
(86). Do not tighten the Nylon Locknuts yet.
Note: There are three kinds of Support Plates.
The main difference between them is the distance between the holes. When you need a
Support Plate, find the kind with holes that
will fit over the bolts you are using.
1
3. Press a 2” Square Inner Cap (67) into the end of
the Press Base (3).
Insert four 5/16” x 2 1/2” Carriage Bolts (75) up
through the indicated holes in the Press Base (3).
Insert a 3/8” x 2 1/2” Carriage Bolt (76) and a 3/8”
x 4” Carriage Bolt (112) up through the indicated
holes at the end of the Press Base.
Attach the Press Base (3) to the Center Base (2)
with two 5/16” x 2 3/4” Bolts (89), a Medium
Support Plate (109), and two 5/16” Nylon Locknuts
(86). Do not tighten the Nylon Locknuts yet.
3
6
Frame Assembly
75
1
67
75
67
95
75
75
76
3
2
86
67
109
89
2
95
86
112
2
67
1
89
86
109
86
4. Slide the Butterfly Upright (4) over the indicated
5/16” x 2 1/2” Carriage Bolts (75) in the Butterfly
Base (1). Hand tighten two 5/16” Nylon Locknuts
(86) onto the Bolts. Do not tighten the Nylon
Locknuts yet.
4
7
5. Press three 2” Square Inner Caps (67) into the
Butterfly Top Frame (7). Press two Round Inner
Caps (63) into the top of the Butterfly Top Frame.
Attach the Butterfly Top Frame (7) to the indicated bracket at the top of the Butterfly Upright (4)
with two 5/16” x 2 3/4” Bolts (89), a Medium
Support Plate (109), and two 5/16” Nylon
Locknuts (86).
5
86
86
67
109
4
4
1
75
67
67
7
86
89
63
63
6. Press a 2” Square Inner Cap (67) halfway into the
top of the Butterfly Leg (11). Attach a Bumper (50)
to the Butterfly Leg with a 1” Tap Screw (80).
Attach the Butterfly Seat Frame (10) to the
Butterfly Leg (11) with two 5/16” x 2 3/4” Bolts
(89), two 5/16” Washers (100), and two 5/16”
Nylon Locknuts (86). Do not tighten the Nylon
Locknuts yet.
6
89
67
80
50
11
10
86
86
100
100
7
8. Press a 1” Square Inner Cap (69) into the small
tube on the Press Upright (5).
Slide the Press Upright (5) over the indicated
5/16” x 2 1/2” Carriage Bolts (75) in the Press
Base (3). Hand tighten two 5/16” Nylon Locknuts
(86) onto the Bolts. Do not tighten the Nylon
Locknuts yet.
Slide the Upright Support (6) over the 3/8” x
2 1/2” Carriage Bolt (76) and the 3/8” x 4”
Carriage Bolt (112) in the Press Base (3). Hand
tighten a 3/8” Nylon Jamnut (92) onto the 3/8” x
2 1/2” Carriage Bolt. Do not tighten the Nylon
Jamnut yet. Note: Do not thread a Nylon
Jamnut onto the 3/8” x 4” Carriage Bolt yet.
Attach the Upright Support (6) to the Press
Upright (5) with two 5/16” x 2 1/2” Carriage Bolts
(75) and two 5/16” Nylon Locknuts (86). Do not
tighten the Nylon Locknuts yet.
8
8
75
10
86
89
11
4
86
86
86
100
75
75
76
112
69
86
86
86
86
92
6
3
5
7. Slide the Butterfly Leg (11) onto the two 5/16” x
2 1/2” Carriage Bolts (75) in the Butterfly Base
(1). Hand tighten two 5/16” Nylon Locknuts (86)
onto the Bolts.
Attach the Butterfly Seat Frame (10) to the
Butterfly Upright (4) with two 5/16” x 2 3/4” Bolts
(89), two 5/16” Washers (100), and two 5/16”
Nylon Locknuts (86).
Do not tighten the 5/16” Nylon Locknuts (86)
yet.
89
100
12
67
89
3
5
75
86
50
80
86
86
9. Press a 2” Square Inner Cap (67) into the Press
Seat Frame (12). Attach a Bumper (50) to the
Press Seat Frame with a 1” Tap Screw (80).
Slide the Press Seat Frame (12) onto the indicated 5/16” x 2 1/2” Carriage Bolts (75) in the Press
Base (3). Hand tighten two 5/16” Nylon Locknuts
(86) onto the Bolts. Do not tighten the Nylon
Locknuts yet.
Attach the Press Seat Frame (12) to the Press
Upright (5) with two 5/16” x 2 3/4” Bolts (89), two
5/16” Washers (100), and two 5/16” Nylon
Locknuts (86). Do not tighten the Nylon
Locknuts yet.
9
9
10. Press a 2” Square Inner Cap (67) into the Press
Top Frame (9).
Attach the Press Top Frame (9) to the indicated
bracket at the top of the Press Upright (5) with
two 5/16” x 2 3/4” Bolts (89), a Medium Support
Plate (109), and two 5/16” Nylon Locknuts (86).
Do not tighten the Nylon Locknuts yet.
11. Identify the Left Weight Guides (27), which have
welded rings near the bottom. Slide two Weight
Bumpers (46) onto the Left Weight Guides. Note:
The wide end of the Weight Bumpers must be
on bottom. Insert the Left Weight Guides into the
indicated holes in the Center Base (2).
Set the other two Weight Bumpers (46) over the
indicated holes in the Center Base (2). Note: The
wide end of the Weight Bumpers must be on
bottom. Insert the Right Weight Guides (26)
through the Weight Bumpers and into the holes in
the Center Base.
10
11
109
9
86
67
5
26
26
2
46
Welded
Rings
27
27
89
12. Attach the indicated Weight Guides (26, 27) to
the Center Base (2) with two 3/8” x 2 3/4” Bolts
(82), four 3/8” Washers (97), and two 3/8” Nylon
Locknuts (90).
2
82
82
97
97
90
90
12
10
13. Slide six Weights (41) onto the Right Weight
Guides (26). Make sure the Weights are turned
so the pin grooves are on the bottom.
Press a Weight Tube Bumper (45) into the lower
end of the Short Weight Tube (44). Slide the
Short Weight Tube into the center holes in the
Weights (41).
Slide a Top Weight (42) onto the Right Weight
Guides (26). Note: Make sure the Top Weight is
turned so the groove fits over the welded pin
on the Short Weight Tube (44).
42
44
26
41
45
Pin
Grooves
Welded
Pin
13
14
14. Slide the Bottom Weight (47) and seven Weights
(41) onto the Left Weight Guides (27). Make sure
the Weights are turned so the pin grooves are
on the bottom.
Press a Weight Tube Bumper (45) into the lower
end of the Long Weight Tube (43). Slide the Long
Weight Tube into the center holes in the Weights
(41).
Slide the other Top Weight (42) onto the Left
Weight Guides (27). Note: Make sure the Top
Weight is turned so the groove fits over the
welded pin on the Long Weight Tube (43).
27
Welded
Pin
Pin
Groove
42
41
43
45
47
11
82
82
29
28
67
8
90
90
92
26
27
4
7
5
8
9
28
5
78
82
35
15
16
38
29
82
90
92
90
15. Press a 2” Square Inner Cap (67) into the Center
Top Frame (8). Place the Center Top Frame on
the indicated brackets on the Uprights (4, 5).
Note: The tops of the four Weight Guides (26,
27) must be behind the Center Top Frame, as
shown in step 16.
Attach the Center Top Frame (8) to the Butterfly
Top Frame (7) with two 3/8” x 2 3/4” Bolts (82), a
Large Support Plate (29), and two 3/8” Nylon
Locknuts (90). Do not tighten the Nylon
Locknuts yet.
Attach the Center Top Frame (8) to the bracket on
the Butterfly Upright (4) with two 3/8” x 2 3/4”
Bolts (82), a Small Support Plate (28), and two
3/8” Nylon Jamnuts (92). Do not tighten the
Nylon Locknuts yet.
16. Attach the Center T op Frame (8) to the rear hole in
the Press T op Frame (9) with a 3/8” x 2 3/4” Bolt
(82), a Large Support Plate (29), and a 3/8” Nylon
Locknut (90). Do not tighten the Locknut yet.
Locate the parts bag labeled “PULLEY BAG
1.” Remove a 3 1/2” Pulley (35) from the bag.
Slide a 3 1/2” Pulley (35) and a Cable Trap (38)
onto a 3/8” x 4” Bolt (78). Slide the Bolt through the
Large Support Plate (29) and Press Top Frame (9),
and hand tighten a 3/8” Nylon Locknut (90) onto it.
Attach the Center Top Frame (8) to the bracket on
the Press Upright (5) with two 3/8” x 2 3/4” Bolts
(82), a Small Support Plate (28), and two 3/8”
Nylon Jamnuts (92). Do not tighten the Nylon
Locknuts yet.
17. Attach each set of Weight Guides (26, 27) to the
Center Top Frame (8) with two 3/8” x 3 3/4” Bolts
(101), two 3/8” SAE Washers (113), and two 3/8”
Nylon Locknuts (90).
Tighten the 3/8” Nylon Locknuts (90), the
5/16” Nylon Locknuts (86), and the 3/8” Nylon
Jamnut (92) used in steps 2–17.
17
90
90
113
26
27
101
101
8
12
20. See the inset drawing. Press a Plastic Bushing
(60) onto each welded tube on the Press Frame
(17). Slide the Press Frame into place on the
Press Base (3). Note: This will be a tight fit.
The Plastic Bushings should fit onto each end
of the welded tubes in the Base.
Lubricate the 3/8” x 8” Bolt (106). Attach the
Press Frame (17) to the Press Base (3) with the
Bolt and a 3/8” Nylon Jamnut (92). Do not over-
tighten the Nylon Jamnut; the Press Frame
must pivot easily.
21. Press a 1 3/4” Square Inner Cap (68) into the top
of a Press Arm (18). Press a 1” Round Inner Cap
(66) into the Press Arm.
Attach the Press Arm (18) to the Press Frame
(17) with two 5/16” x 2 1/2” Bolts (87) and two
5/16” Nylon Locknuts (86).
Repeat this step with the other Press Arm (18).
21
68
18
18
17
86
87
66
Arm Assembly
18. Locate and open the parts bag labeled “ARM
ASSEMBLY.”
Press two 2” Square Inner Caps (67) into the
ends of the Leg Lever (13).
Lubricate a 3/8” x 3 1/4” Bolt (104). Attach the
Leg Lever (13) to the Butterfly Leg (11) with the
Bolt and a 3/8” Nylon Jamnut (92). Do not over-
tighten the Nylon Jamnut; the Leg Lever must
be able to pivot easily.
18
67
67
13
92
11
104
Lubricate
19. Lubricate the 3/8” x 3” Bolt (88). Attach the Leg
Press Lever (14) to the Press Base (3) with the
Bolt and a 3/8” Nylon Locknut (90). Do not over-
tighten the Nylon Locknut; the Leg Press
Lever must pivot easily.
19
90
Lubricate
88
3
14
92
Lubricate
17
3
60
17
106
20
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