Tuff stuff MSL-IV Assembly & Instruction Manual
A SSEMBLY INSTRUCTION MANUAL
MSL-IV
Muscle IV Home Gym
America’s Premium Exercise Equipment
Revision Date 9 -98
L 8’-0” W 4’-0” H 7’-0”
y
Introd
uction
bout the Muscle IV Home Gym (MSL-IV).
Congratulations on your new purchase of the Muscle IV
ome Gym (MSL-IV). This gym is capable of a variet y of
ifferent exercises, as well as, smooth and user-friendly
djustment features. In addition, this gym has been
esigned to meet the needs and performance requirements
r a suitable home exercise machine. We hope you are
ompletely satisfied with this product and wish you many
ears of enjoyment.
uff Stuff Equipment
Every Tuffstuff product has been built to precise quality
tandards and has been carefully packaged to ensure that
amage will not occur during shipment. The limited lifetime
arranty and signature indicating final inspection which was
onducted by our line foreman, is an expression of our
onfidence in the completeness, the materials, and
orkmanship of this product.
arranty
SEE WARRANTY REGISTRATION CARD
egistration Card
To avoid unnecessary delays in warranty parts and to
sure that a permanent record of your purchase is on file
ith our factory, be sure to complete the warranty
gistration card and send it to Task Industries today.
afety Information
) Familiarize yourself and others with the proper operation
nd workout recommendations for each piece of Tuff Stuff
quipment prior to use.
) Consult with your physician before beginning any
xercise program.
) Use proper discretion when children are present.
) Frayed or worn cables can be dangerous and may cause
jury. Periodically check these cables for any indication of
ear.
) Inspect machine for any sign of parts or hardware
ecoming loose.
Maintenance Information
1) Lubrication of all moving parts is essential to the longevit
and optimal performance of your Muscle IV Home Gym.
Initial lubrication of some parts of your gym have been done
at the factory, but the weight stack guide rods must be
lubricated at the time of assembly. We recommend a clear
aerosol, silicone or Teflon spray.
Note: Do not use oil based lubricants as they will attract
dust,dirt, and grime and will eventually gum up and erode
bushings and sealed bearings.
2) All pulleys and bushings should be checked regularly for
signs of wear.
3) Check and adjust tension on cables periodically as it will
maintain proper anatomical function.
4) Periodically check all moving parts, upholstery and grips
for wear. If replacement is necessary, please contact your
local Tuff Stuff retailer or call our Customer Service
Department.
5) As needed, upholstery may be cleaned with a mild
solution of soap and water. Regular use of a vinyl treatment
will add to the life and appearance of your upholstery.
6) All chrome plated surfaces should be cleaned regularly to
prolong the life and luster of the finish. Wipe machine down
with a damp cloth and dry thoroughly each day. At least
once a week your chrome equipment should be polished
with a commercial grade or automotive type chrome polish.
Tool Requirements
1) Two 3/4” Open-end wrenches
2) Two 9/16” Open-end wrenches
3) One rubber mallet
4) Needle nose pliers
5) One can Silicone Spray/ Teflon Spray Lubricant
6) Snap ring pliers
7) Hex Key 3/16” (Supplied)
7) Windex or household glass cleaner
Hardware Measurement Diagram
) Keep hands and limbs clear from weight stack and all
ther moving parts.
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MSL-IV Muscle IV Home Gym
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Owners’ Manual: Assembly Instruction
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IMPROVED
See #63 on page 19
IG. 1 On a flat surface, lay the Base Frame (#2) down
nd insert two Plastic Insert Caps 2” Sq. (#64). Next, insert two
lastic Insert Caps 2” Sq. w/groove (#63) onto the front
tabilizer of the Base Fr ame (#2), as shown above.
FIG. 2 Locate the Low Row Foot Support (#37) and slid
a Hard Grip .875 X 8 (#60) over each end of the tube, as
illustrated above. The hard Grip .875 X 8 (#60) fits very tightl
onto the Low Row Foot Support (#37) and it may be
necessary to use windex or a household glass cleaner (as
shown) to complete this procedure. Next, insert one Plasti
Insert Cap 2” Sq. (#64) into the tube-end of the Low Row Foo
Support (#37).
IG. 3 Install the Low Row Swivel Pulley Bracket (#25)
nto the receptacle on the Low Row Foot Support (#37) and
ecure it using one Nylon Insert Jam Lock Nut 1/2-13 (#88)
nd one Flat Washer SAE 1/2 (#89). Note: It is recommended
hat the axle on the Low Row Swivel Pulley Bracket (#25)be
ubricated with grease prior to this assembly.
SL-IV Muscle IV Home Gym
FIG. 4 Attach the Low Row Foot Support (#37) to the
Base Frame (#2) and secure it using using two Hex Head Cap
Screws 3/8-16 X 2 3/4 (#77), four Flat Washers SAE 3/8 (#90)
and two Nylon Insert Jam Lock Nuts 3/8-16 (#86). Next, insert
two Plastic Insert Caps 2 X 3 (#101) into the pulley bracket
housing on the Low Row Foot Support (#37).
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IG. 5 Attach the Rear Upright (#4) to the Base Frame (#2)
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)
h
nd secure it using two Hex Head Cap Screws 3/8-16 X 2 3/4
#77), four Flat Washers SAE 3/8 (#90) and two Nylon Insert
ock Nuts 3/8-16 (#86). Note: Do not tighten this hardware
ssembly at this time. Next, insert two Plastic End Caps 2” Sq.
/groove (#63) into the Rear Upright (#4), as shown above.
FIG. 6 Attach the Front Upright (#3) to the Base Frame
(#2) and secure it using one Hex Head Cap Screw 3/8-16 X 2
3/4 (#77), two Flat Washers SAE 3/8 (#90) and one Nylon
Insert Jam Lock Nut 3/8-16 (#86). Note: Do not tighten this
hardware assembly at this time.
IG. 7 Attach the Leg Extension Seat Frame (#38) to the
ase Frame (#2). Secure the Leg Extension Seat Frame
#38) to the Base Frame (#2) using one Hex Head Cap Screw
/8-16 X 4 1/2 (#93), two Flat Washers SAE 3/8 (#90) and one
ylon Insert Jam Lock Nut 3/8-16 (#86). Next, secure the Leg
xtension Seat Frame (#38) to the Front Upright (#3) using
ne Hex Head Cap Screw 3/8 -16 X 2 3/4 (#77), two Flat
ashers SAE (#90) and one Nylon Insert Jam Lock Nut 3/8-16
#86). Note: Do not tighten this hardware assembly at this
ime.
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FIG. 8 Slide the Pec Dec Adj Seat Tube (#27) onto th
Rear Upright (#4),as shown above. Note: Position the Pe
Dec Adj Seat Tube (#27) with the Push-Pull Pin 1/2 (#56
facing the same side as the selector holes on the Rear Uprig
(#4).
MSL-IV Muscle IV Home Gym
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Owners’ Manual: Assembly Instructions
IG. 9 Secure the Top Pulley Assembly (#5) to the Front
pright (#3) using two Hex Head Cap Screws 3/8-16 X 4 1/4
#99) four Flat Washers SAE 3/8 (#90) and two Nylon Insert
ock Nuts 3/8-16 (#86). Next, secure the Top Pulley
ssembly (#5) onto the Rear Upright (#4) using one Hex
ead Cap Screw 3/8-16 X 3 (#94), two Flat Washers SAE 3/8
#90) and one Nylon Insert Jam Lock Nut 3/8-16 (#86). Note:
his bolt should be placed in the top hole of the Rear Upright
#4).
FIG. 10 Next, attach the Pec Dec Housing (#18) to the
Rear Upright (#4). secure this assembly using one Hex Head
Cap Screw 3/8-16 X 3 1/2 (#8), two Flat Washers SAE 3/8
(#90) and one Nylon Insert Jam Lock Nut 3/8-16 (#86). Note
This bolt should be placed in the top hole of the Pec Dec
Housing (#18). Next, install one Hex Head Cap Screw 3/8 -1
X 3 (#94), two Flat Washers SAE 3/8 (#90) and one Nylon
Insert Jam Lock Nut 3/8-16 (#86) through the lower hole of th
Pec Dec Housing (#18). Finally, install the Rubber Stopper
(#62) and two Plastic Insert Caps 2 Sq. (#64), as shown
above.
IG. 11 Attach the Pec Dec Arm (#7) to the Pec Dec Arm/
am Support (#13) and secure it using one Hex Head Cap
crew 1/2-13 X 3 (#98), two Flat Washers SAE 1/2 (#89) and
ne Nylon Insert Jam Lock Nut 1/2-13 (#88). Repeat this
rocedure for the opposite Pec Dec Arm Assembly. Note: It is
ecommended that the axle on the Pec Dec Arm (#7) be
ubricated with grease prior to assembly.
SL-IV Muscle IV Home Gym
FIG. 12 Mount the assembled Pec Dec Arms (#7) in
Fig.11 to the Pec Dec Housing (#18) axles, as illustrated.
Note: It is recommended that the Pec Dec Housing (#18)
axles be lubricated with grease prior to assembly. Next, mount
the two Pec Dec Cams (#9) onto the the axles of the Pec Dec
Housing (#18), as shown above.
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IG. 13 Secure the two Pec Dec Cams (#9) to the Pec
p
ec Housing (#18) using two Retaining Snap Rings (#49).If
ossible, use special snap ring pliers for this job, as shown
bove. If not available, carefully work each Retaining Snap
ing (#49) into the groove, then push down alternately with a
crew driver working the Retaining Snap Ring (#49) into the
roove. Note: Be careful not to distort the Retaining Snap
ing (#49) or bend it.
FIG. 14 Insert a Handle Bracket Left (#11) and Right
(#97) into the two Pec Dec Arms (#7) and secure them using
two Hex Head Cap Screws 3/8 -16 X 1 (#81) and two Fender
Washers 3/8- 1 1/2 (#106).
IG. 15 Insert the two Pec Dec Swivel Pulley Brackets
#25) into the receptacles on the Top Pulley Assembly (#5)
nd secure using four Flat Washers SAE 1/2 (#89) and two
ylon Insert Lock Nuts 1/2-13 (#88). Do not over-tighten these
uts, as the Pec Dec Swivel Pulley Brackets (#25) must
ove freely during use of the machine. Note: It is
ecommended that the Pec Dec Swivel Pulley Brackets (#25)
e greased prior to assembly.
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FIG. 16 Install the Ab Crunch Insert Bracket (#57) and
one Nylon Pulley 4 1/2 Rd. (#35-Not shown See Fig 56) into
the Rear Upright (#4) and secure it using one Hex Head Ca
Screw 3/8-16 X 2 1/2 (#78), two Flat Washers SAE 3/8 (#90)
and one Nylon Insert Jam Lock Nut 3/8-16 (#86).
MSL-IV Muscle IV Home Gym
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Owners’ Manual: Assembly Instruction
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IG. 17 Insert the two Guide Rods (#20) into the
eceptacle of the Base Frame (#2), as shown above. Next,
nsert two Rubber Donuts 1 X 2 1/2 (#41) onto each each
uide Rod (#20). Note: Lubricate the Guide Rods (#20) with
ilicone or teflon lubricant at this time.
FIG. 18 Carefully begin sliding the 10 Lb. Weight Plates
(#52) over the Guide Rods (#20),one or two at a time as our
skill permits. Make sure that the 10 Lb. Weight Plates (#52)
are installed onto the Guide Rods (#20) in numerical order,
beginning with the number 200 at the bottom,190 next, and s
on.
IG. 19 Now slide the Top Plate/Selector Bar (#58) over
he Guide Rods (#20) allowing it to come to rest on the
ompleted weight stack.
SL-IV Muscle IV Home Gym
FIG. 20 Maneuver each of the Guide Rods (#20) into the
holes on the bottom side of the Guide Rod Retainer (#54).
Next, mount the Guide Rod Retainer (#54) along with the two
captive Guide Rods (#20) to the side of the Top Pulley
Assembly (#5). Secure this assembly using two Hex Head
Cap Screws 3/8 -16 X 3 (#94), four Flat Washers SAE 3/8
(#90) and two Nylon Insert Jam Lock Nuts 3/8-16 (#86).
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IG. 21 Locate the Adjustable Pulley Bracket (#26) and
r
hread a Hex Nut 1/2 -13 (#88) and a Flat Washer SAE 1/2
#89) onto it. Use the illustration above for further clarification
f this bolt and nut assembly. Next, insert the Adjustable
ulley Bracket (#26) into the Guide Rod Retainer (#54) and
ecure it using one Nylon Insert Jam Lock Nut 1/2-13 (#88)
nd one Flat Washer SAE 1/2 (#89). Note: Loosely secure the
ut to allow adjustment for cable tension later in the assembly
rocess.
FIG. 22 Insert the Lat Bar Holder (#22) into the tube-end of
the Top Pulley Assembly (#5), as shown above. Secure this
assembly using one Hex Head Cap Screw 3/8-16 X 2 1/2
(#78), two Flat Washers SAE 3/8 (#90) and one Nylon Insert
Jam Lock Nut 3/8-16 (#86).
IG. 23 Now position the Press Arm (#1) to the Top Pulley
ssembly (#5), as shown above. Next, press the Pivot Axle 1
11 3/4 (#19) through the holes in the Press Arm (#1) using
rubber mallet hammer until it is flush with both sides. Note:It
s recommened that the Pivot Axle 1 X 11 3/4 (#19) be
reased prior to this assembly.
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FIG. 24 At the top of each end of the Press Arm (#1) is a
set screw fixture. Secure the Press Arm (#1) using two Set
Screws 3/8-16 X 1/2 (#61). Use the Hex Key 3/16 (#50) tool fo
securing the Set Screws 3/8-16 X 1/2 (#61). Next, insert two
Plastic Insert Caps 1 X 2 (#67) into the tube-ends of the Press
Arm (#1).
MSL-IV Muscle IV Home Gym
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