Stairmaster 8G 9-5270 User manual

Brand: Stairmaster

Model: 8G 9-5270

Category: Fitness, gymnastics & weight training

Type: User manual

This manual is also suitable for

8G 9-5250

SERVICE

MANUAL

8 Series Gauntlet

Core Health & Fitness

Page 2

Title Page and Table of Contents .......................................................................................... 1

SAFETY INFORMATION ............................................................................................................................................. 3

Safety Instructions .......................................................................................... 5

Important Label Locations ........................................................................................17

Terminology ........................................................................................19

PRODUCT SPOTLIGHT ...........................................................................................................................................20

INSTALLATION ...........................................................................................................................................21

PART IDENTIFICATION & THEORY ...........................................................................................................................................28

Drive System ........................................................................................28

Power System ........................................................................................31

Step Hardware ........................................................................................35

Drive System Hardware ........................................................................................38

WIRING AND POWER FLOW ...........................................................................................................................................41

SIGNAL FLOW ...........................................................................................................................................43

PREVENTATIVE MAINTENANCE ...........................................................................................................................................44

TROUBLESHOOTING ...........................................................................................................................................47

Troubleshooting Procedures ........................................................................................51

Part Replacement Procedures ........................................................................................53

TABLE OF CONTENTS

Click any text to jump to section

Page 3

SAFETY INFORMATION

DANGER - to reduce the risk of electrical

shock:

1. Always unplug the machine from the electrical

outlet before cleaning or servicing.

2. This machine is not intended to be serviced by

the end user, refer servicing to qualied person-

nel only.

3. This product will be wired for either 120 VAC

nominal power input OR 230 VAC nominal input.

It is factory-equipped with a specic electric

cord an plug to permit connection to the proper

electric circuit. Make sure that the product is con-

nected to a dedicated power line having an outlet

with the same conguration as that of the plug.

4. Improper connection of the equipment-ground-

ing conductor can result in a risk of electric shock.

Check with a qualied electrician or serviceman

if you are in doubt as to whether the product

is properly grounded. Do not modify the plug

provided with the product. NO adapter should

be used with this product. If the product must be

reconnected for use on a dierent type of electric

circuit, the reconnection should be made by qual-

ied service personnel in order to avoid a hazard.

5. If the power supply cord is damaged, it must be

re placed by the manufacturer, its service agent,

or similarly qualied persons in order to avoid

hazard.

WARNING - to reduce the risk of burns, re, electrical

shock, or injury to person:

1. This equipment is designed for use in a com-

mercial gymnasium or health club. To ensure the

proper use of the equipment in a safe manner, all

users of the equipment should read this manual

before using the machine. This machine should

be made a part of your club training program in

order that the equipment is used by your mem-

bers in a safe manner as intended. In addition to

instructing the club members in the proper use of

the equipment, the club member should obtain a

complete physical examination form their health

care provider before beginning any exercise

program.

2. This machine is not intended to be used by

children. It is not intended to be used by persons

with reduced physical, sensory, or mental capabil-

ities or lack of experience and knowledge, unless

given instruction and under the personal super-

vision concerning use of the machine by a person

responsible for their safety. Do not leave children

unsupervised around the machine.

3. Assemble and operate the machine on a solid lev-

el surface. Position the machine with a minimum

of 20 inches (0.5 meters) of clearance on each

side to allow for ease of mounting and dismount-

ing. Allow for 48 inches (1.25 meters) of clearance

behind the ma chine. These dimensions are the

recommended minimum distances. The actual

area for access and passage is the responsibility

of the facility and should take into account this

training envelope and any other national or local

codes or regulations.

4. Keep power cord away from heated surfaces.

Unplug power cord when the machine is unat-

tended and before performing any preventative

maintenance such as cleaning or replacing a

worn part.

5. Familiarize yourself with the location of the STOP

buttons on the console. If you experience dicul-

ties during the workout, pushing the STOP button

will bring the machine to a stop.

6. Do not exceed the maximum allowable weight

limit of 350 lbs. / 158 kg.

7. Use care when getting on or o the machine.

Always use the handrails. Do not step o of the

machine while it is moving. Press the STOP button

and wait for the machine to come to a complete

stop before dismounting.

8. Do not over exert yourself during exercise. Stop

exercising if you feel pain or tightness in your

chest, become short of breath or feel faint. If you

feel pain or experience any abnormal symptoms,

stop exercising and consult your health care

provider.

Page 4

9. Wear proper exercise clothing and athletic shoes

during a workout. Avoid wearing loose clothing.

Tie back long hair and keep towels away from

the moving parts. Face forward at all times and

never attempt to turn around while the machine

is moving.

10. Do not operate the machine if the motor shroud

is removed or if the power cord is damaged in

any manner. Keep all air openings free from dirt

or any material that would block the ow of air to

the motor.

11. The safety and integrity of this machine can only

be maintained when the equipment is regularly

examined for damage and wear and repaired.

It is the sole responsibility of the owner of this

equipment to ensure that regular maintenance

is performed. Worn or damaged parts must be

replaced immediately or the equipment removed

from service until the repair is made.

Page 5

Safety Instructions

This chapter includes precautions and tness safeguards for the installation and use of the product. Please read this

chapter carefully before installing or using your equipment.

Safety instructions are provided in the following languages (in the order shown):

• English

• Dutch

• French

• Italian

• Portuguese

• Spanish

• Swedish

• Chinese

• Japanese

• Arabic

Page 6

These safety notes are directed to you as the owner of the equipment. For safety purposes, it is your

responsibility to train all your members and tness sta to follow these safety instructions.

• Do instruct your members to obtain a medical

exam before starting any exercise program. If at

any time during exercise you feel faint, dizzy or

experience pain, stop and consult your physician

• Do read, understand and carefully follow all warn-

ings, instructions and procedures on the machine

and in this manual before use.

• Do use your machine only for its intended use, as

described in this manual.

• Do set up the machine on a solid, level surface

• Do inspect the machine for incorrect, worn or

loose components and then correct, replace or

tighten prior to use

• Do stop operating your machine if you feel dizzy,

faint or exhausted.

• Do use care when mounting or dismounting the

machine, and make sure it is completely stopped

before attempting to mount or dismount

• Do perform regular preventive maintenance as

instructed in the manual.

• Do keep the air openings free of lint, hair, etc.

• Do keep the belt surface clean and dry.

• Do move the pedal on the mounting or dismount-

ing side to the lowest position and bring the

machine to a complete stop before attempting to

get on or o

• Do reduce pedal/crank speed in a controlled man-

ner - this unit is not equipped with a free-wheel.

• Do read, understand and test the emergency STOP

procedure prior to use.

• Do keep the electrical cord away from sources of

excessive heat.

• Do disconnect all power before doing any mainte-

nance or cleaning.

DO NOT

• Do not let children operate your machine. Super-

vise invalids or disabled persons who use your

machine.

• Do not exceed the maximum allowable user

weight (350 lbs. / 159 kg).

• Do not use your machine without athletic shoes.

• Do not wear loose or dangling clothing while

using the machine.

• Do not step or jump on or o the machine while it

is in motion.

• Do not use this machine in damp or wet locations

• Do not ever drop or insert any object, hands, or

feet into any opening, or underneath this equip-

ment.

• Do not place water bottles or cups on the machine

unless you are using the designed holders

• Do not use your machine where aerosol (spray)

products are being used or where oxygen is being

administered.

• Do not use attachments or parts not recommend-

ed by the manufacturer.

• Do not run the equipment with the motor shroud

removed, or modify the equipment in any way.

• Do not operate your machine if it has a damaged

cord or plug, if it is not working properly, if it has

been dropped or damaged, or if the display shows

an error code.

CAUTION: READ THE OWNER’S

MANUAL COMPLETELY BEFORE

OPERATING THIS MACHINE.

CAUTION: BEFORE CLEANING OR

SERVICING, DISCONNECT POWER

SUPPLY.

CAUTION: MOVING PARTS, KEEP

HANDS AND FEET FROM UNDER

THE STAIRMILL WHEN

OPERATING.

STOP (OF ACTIVITY)

OFF

PRECAUTIONS

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Page 17

Important Label Locations

050-2215 B

READ THE OWNERS MANUAL

AND FOLLOW ALL PROPER

INSTRUCTIONS PRIOR TO USE.

IMPROPER USE OF THIS MACHINE

CAN RESULT IN SERIOUS INJURY.

1. As with all exercise equipment

or programs, consult a physician

prior to use and stop if you feel

faint, dizzy or exhausted.

2. This equipment should only be

used in a supervised environment.

3. Inspect machine prior to use and

immediately report worn, loose or

damaged equipment to the

responsible party and refrain from

using it.

4. Always exercise in control. Begin

exercising carefully as steps and/or

pedals will begin to move once

contacted.

5. Keep body and clothing free and

clear of all moving parts.

6. Always wear closed toe athletic

shoes when operating this machine.

7. Keep children away.

8. Replace this label if damaged or

illegible.

P/N: 050-2198 REV

MAX USER

WEIGHT

CERTIFICATIONS

MFG

DATE

VOLT

AMPS

CYCLES

WATTS

PHASE

Patents:

Core Health & Fitness, LLC

4400 NE 77th Avenue, Suite 300

Vancouver, WA 98662 USA

1-888-678-2476

P/N: 050-5456 Rev

Class SA Fitness Equipment

for comercial use only

DESIGNED IN THE USA

MADE IN CHINA

www.corehealthandfitness.com/patents

Page 18

Regulatory Information

This section provides regulatory and safety information

pertaining to the product

FCC AND OTHER DOMESTIC

REGULATIONS

This product has been tested and found to comply with

the limits for a Class A digital device, pursuant to Part 15

of FCC rules. Under FCC guidelines, operation is subject

to the following two guidelines:

1. This device may not cause harmful interference, and

2. This device must accept any interference received,

including interference that may cause undesired

operation.

The product generates and uses radio frequency energy.

If the product is not installed and used in accordance

with the instructions provided in the owner’s manual,

interference with radio communications may occur.

Likewise, if unapproved accessories are installed, in-

terference with radio communications may occur. The

intent of the FCC class A limit is to provide reasonable

protection against harmful interference in a commercial

installation. However, there is no guarantee that inter-

ference may not occur in a specic installation. In the

event that interference is experienced, turn o the unit

to verify that it is the source. If the interference clears

with the unit o, then try each of the following mea-

sures and combinations thereof:

• Reorient or relocate the machine.

• Reorient or relocate the receiving antenna for your

television, radio or VCR.

• If using the wall outlet option, connect the unit to a

dierent power outlet.

• Contact Product Support, your authorized dealer, or a

qualied radio/television technician for help. This product

has also been tested to meet the following standards:

• UL 1647 (1997) Motor Operated Massage and Exercise

Machines

CANADIAN DOC AND OTHER

REGULATIONS

This class A digital apparatus meets all requirements of

the Canadian Interference Causing Equipment

Regulations. This product has also been tested to meet

the following standards:

• CSA C22.2 No 0-M91 General Requirements

• CSA C22.2 No. 68-92 Motor Operated Appliances

EUROPEAN APPLICATIONS

This product has been tested to the following

standards:

EN 60335-1:

1995 Safety of household and similar

electrical appliances Part 1: General

requirements

EN 61000-6-1:

2001 EMC Generic standards - Immunity for

residential, commercial and

light-industrial environments

EN 61000-6-3:

2001 EMC Generic standards - Emissions

standard for residential, commercial and

light-industrial environments

EN 957-1 Safety of Machinery

EN 957-8 Stationary Training Equipment - Part

8: Steppers, Stairclimbers and

Climbers- Additional Specication

safety requirements and test methods

OTHER

ASTM 2776-10 Standard Specication for tness

Equipment

Page 19

Terminology

Concept Description

Current The number of electrically charged particles that ow past a given point on a

circuit in a given time

Ampere (AMP) A measure of current

Volt (V) Measures the dierence of the current pressure of a circuit. Core refers to the 2

most common global voltages as:

• 110V (or 110VAC)

• 220V (or 220VAC)

Watt (W) The rate at which an electrical device consumes energy

Resistance The ability of a part to dissipate passing current into heat to lower a voltage.

Resistance is measured in Ohm’s (Ω). All components have a resistance.

Potentiometer (POT) An electronic component which has an adjustable resistance

Hot Wire Delivers power to the unit. Typically has black, brown, or red insulation

Neutral Wire Once electricity has done its work, it goes back through the neutral wire to

complete the circuit. Typically has white or blue insulation

Ground Wire In addition to the neutral wire, the ground wire oers current another path

should an electrical short happen. Also help to dissipate static build-up from

components. Typically has green insulation (may be bare copper in some cases)

General Electricity

Voltages worldwide can vary. Core products are designed to be stable within most voltages:

• For 110V systems the voltage range is: 110 VAC – 125 VAC 50/60hz

• For 220V systems the voltage range is: 190 VAC – 250 VAC 50/60hz

Electrical Tools

Multi-Meter – Used to test voltages, amperages and ohm readings. They can vary on

type from digital (as shown to the right) or analog. For this service manual we will refer

to the digital style for diagnostics.

Page 20

PRODUCT SPOTLIGHT

Beginning with the rst stepping machine in 1983, StairMaster® has been a legendary name in the gym. Today the tra-

dition continues with the Gauntlet®. Building on 30 years of experience and proven performance, the Gauntlet provides

a superior combination of cardio and strength training in our most comfortable design ever. The machine features a

deeper, wider step surface with durable, rust-free polypropylene construction and is now available with all three smart,

aordable, exible, OpenHub™ console options. Its combination of quality and innovation delivers a workout that’s head

and shoulders above anything else in the gym.

• The Landmark Challenge program allows users to climb well-

known landmarks from around the world like the Eiel Tower,

the Statue of Liberty and the Taj Mahal. Standard console pro-

grams are also included

• Electronically controlled alternator, brake and drive chain pre-

cisely control the stair speed, allowing a wide range of users to

exercise smoothly within their comfort zones

• Hot bar with stop button, heart rate, and level control

• Revolving staircase with eight steps, 8 in (20 cm) high, 9 in (23

cm) deep and 22 in (56 cm) wide

• 24 to 162 steps per minute

• User weight capacity 350 lbs (159 kg)

User Weight Capacity Width Length Height

350 lbs (159 kg) 34˝ (68 cm) 58˝ (147 cm) 89˝ (226 cm)

BLUETOOTH

ANT+

USB CHARGING PORT

HDMI PORT

PERSONAL FAN

TV TUNER (GLOBAL)

INTEGRATED SERVICE LIGHT

800/900mHz RECEIVER

IPTV

ADD-ON PERSONAL VIEWING SCREEN

THREE CONSOLE OPTIONS

15” TOUCH SCREEN 10” TOUCH SCREEN LCD SCREEN

FEATURES

OPENHU B

™

OPTIONALINCLUDED

Page 21

INSTALLATION

Caution: The unit is very heavy.

Two people may be needed to move the frame assembly.

1. Remove all the packaging material and parts

not attached to unit including shrouds, mast,

hardware card, etc. so the 8G Stepmill is ready for

assembly on the shipping crate platform. Move

the main assembly carefully o the shipping

pallet.

The following parts are included on the hardware

cards. If cards or parts are missing, please contact

support.

PART # DESCRIPTION QT Y.

110-1830 NUT, 3/8-16, NYLOK HEX 6

110-1871 NUT, 5/16-18, NYLOC 4

110-3480 NUT, 3/8-16, SHN, CS, ZP, GR 5 4

120-3330 WASHER, PLAIN, ID: .375", OD: .875", TH: .06", CS, ECB 8

140-3494 PIN, COTTER, Ø.12" WIRE, 1/2"-5/8" SHAFT, CS, ZP 2

140-3495 FEET, 3/8-16 SCREW, 1.93" BASE 4

711-3285 RIVET, FLUSH, LOCK, PUSH, Ø6.5mm 34

731-0367 WASHER,PLAIN,M10 12

740-7842 WASHER, 8.4mmID X 21mm OD X 1.6mm THK 4

110-3479 SCREW, 3/8-16, 1", BHCS, CS, ECB 4

110-3481 SCREW, 3/8-16, 3 5/8", BHCS, AS, ZP 2

110-3482 SCREW, 5/16-18, 1 3/4", BHCS, AS, ZP 4

110-3510 Screw, 5/16-18, 3/4", BHCS, AS, ECB 4

711-3339 PIN, TRANSPORTATION, SM 2

Page 22

2. Secure the Frame Neck Adapter to the frame

using four (4) pieces each of the 5/16”x1 3/4”

screws, 21mm OD washers, and 5/16” nylok hex

nut.

3. Slide the Mast Grommet onto the mast rst and

then the Upper Shroud Cover

Route the wires for the display up and out

through the top of the mast. Then use two (2)

pieces each of the 3/8”x3 5/8” screws, 3/8” nylok

hex nuts, and (4) pieces of Ø3/8” ID washer to

secure the Mast to the Frame Neck Adapter.

4. Install the upper handrail beauty ring onto the

top of the lower neck as shown. Connect the

heartrate grip wires on the left side handrails

prior to bolting.

Slide beauty ring onto both handrails of the Hot-

bar Handrail Assembly. Exert force on handrail

sucient to insure a tight seal with the beauty

ring then use two (2) pieces each of 5/16”x3/4”

screws and Ø1.6 ID washers to secure the hand-

rails to the mast per side.

Page 23

5. Slide the Left Handrail Grommet onto the Lower

Left Handrail then repeat this step for the Right

Handrail Grommet and Lower Right Handrail. At-

tach handrails with (2) pieces each of the 3/8”x1”

screws and 3/8” nylok hex nuts and (4) pieces of

the Ø3/8” ID washers each side.

Check to ensure both the beauty rings for the Hotbar Handrail Assembly and the rubber

grommets for both the Mast and Lower Handrails are in place and all hardware is tight prior to

proceeding.

6. Attach the Lower Left Handrails to the Hotbar

Handrail Assembly using two (2) pieces each of

5/16”x3/4” screws and .875” OD washers. Repeat

this step for the Lower Right Handrail.

Page 24

7. Slide the upper shroud cover and neck grom-

met down the mast onto the frame ensuring

the grommet has a good seal between the mast

and the upper shroud before securing using the

plastic rivets on the inside of the frame.

8. Attach the Lower Right Handrail Cover using

the plastic rivets then repeat for the Lower Left

Handrail. Slide the Lower Handrail Grommets

down and ensure a tight seal against the Lower

Shrouds and Lower Handrail Covers.

9. With help from another individual, tip the 8G on

its left side and install the left side Leveling Feet.

Repeat this process for the right side Leveling

Feet.

Crushing Warning: The unit is very heavy.

Two people are needed to tip this unit safely.

Page 25

10. Fasten the back half of the console assembly

to the Mast using the screws supplied with the

console.

11. Connect the appropriate wires coming out of the

mast to the correct locations, please reference

the console wiring guide (CSB 620-8424).

12. Secure the front half of the console assembly to

the back half using the screws supplied with the

console taking care not to pinch any wires and

ensuring that the rubber console grommet has a

good seal.

Page 26

13. Install Transport Wheels (Optional)

14. The Transport Wheels can optionally be installed

to help with movement of the unit. Slide a

Transportation Pin through the left side of the

frame. Then, slide one Transport Wheel onto the

left side transportation pin so that the wheel

sits inside the frame. Finally, use a cotter pin to

lock the transport wheel onto the transportation

pin. Repeat these steps for the right Transporta-

tion Wheel. Once the machine has been moved

into the desired location, remove the transport

wheels prior to use.

15. Clamp the Power Cord

16. Remove the Phillips screw and place the power

cord into the clip. Then reinstall the screw.

Page 27

17. Installation is Complete

18. Plug power into wall and perform nal checks.

Note: Be sure to set the display to correct model

in the Maintenance Mode.

Page 28

PART IDENTIFICATION & THEORY

Resistance is applied to the steps of the machine by use of an alternator. 12VDC power from the lower board is fed into

the alternator to control the amount of resistance it applies. The resistance system (alternator) connects the gearing

system, or gear box of the machine via a poly-V belt.

I. Drive System

Engine Kit

Part Number: 711-3510-KT

Consists of pre-calibrated gearbox, brake and alternator

Page 29

Gearbox

Part Number: 711-3334

Brake Kit

Part Number: 260-0958-KT

Diagram

Speed Sensor

Part Number: 140-3501

• LCB Connection: J1

Page 30

Alternator Assembly

Part Number: 711-3361

• +3 Volts control input supplied to LCB

• +12 Volts supplied from LCB

• Provides resistance to the unit

• Assembly may include alternator 260-0952 or SM22900. Wiring for both using harness 711-3351 is below.

260-0952 Alternator Wiring

- Blue to F

- Red to B+

- Green to B-

SM22900 Alternator Wiring

- Blue to FLD (BRN)

- Red to B+

- Green to GND

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Stairmaster 8G 9-5270 User manual

Brand: Stairmaster

Model: 8G 9-5270

Category: Fitness, gymnastics & weight training

Type: User manual

This manual is also suitable for

8G 9-5250

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Stairmaster 8G 9-5270 User manual

This manual is also suitable for

Stairmaster 8G 9-5270 User manual

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