Sunny SF-B1877 User manual

MAGNETIC BELT DRIVE INDOOR
CYCLING BIKE
SF-B1877
USER MANUAL
IMPORTANT! Please retain owner’s manual for maintenance and adjustment instructions. Your
satisfaction is very important to us, PLEASE DO NOT RETURN UNTIL YOU HAVE
CONTACTED US: [e-mail] or 1- 877 - 90SUNNY (877-907-8669).

1
IMPORTANT SAFETY INFORMATION
We thank you for choosing our product. To ensure your safety and health, please use this
equipment correctly. It is important to read this entire manual before assembling and using the
equipment. Safe and effective use can only be achieved if the equipment is assembled,
maintained, and used properly. It is your responsibility to ensure that all users of the
equipment are informed of all warnings and precautions.
1. Before starting any exercise program, you should consult your physician to determine if
you have any medical or physical conditions that could put your health and safety at risk
or prevent you from using the equipment properly. Your physician’s advice is essential if
you are taking medication that affects your heart rate, blood pressure, or cholesterol level.
2. Be aware of your body’s signals. Incorrect or excessive exercise can damage your health.
Stop exercising if you experience any of the following symptoms: pain, tightness in your
chest, irregular heartbeat, shortness of breath, lightheadedness, dizziness, or feelings of
nausea. If you do experience any of these conditions, you should consult your physician
before continuing with your exercise program.
3. Keep children and pets away from the equipment. The equipment is designed for adult
use only.
4. Use the equipment on a solid, flat level surface with a protective cover for your floor or
carpet. To ensure safety, the equipment should have at least 2 feet (60 CM) of free space
all around it.
5. Ensure that all nuts and bolts are securely tightened before using the equipment. The
safety of the equipment can only be maintained if it is regularly examined for damage
and/or wear and tear.
6. Always use the equipment as indicated. If you find any defective components while
assembling or checking the equipment, or if you hear any unusual noises coming from
the equipment during exercise, discontinue use of the equipment immediately and do not
use until the problem has been rectified.
7. Wear suitable clothing while using the equipment. Avoid wearing loose clothing that may
become entangled in the equipment.
8. Do not place fingers or objects into the moving parts of the equipment.
9. The maximum weight capacity of this unit is 265 pounds (120 KG).
10.This equipment is not suitable for therapeutic use.
11.To avoid bodily injury and/or damage to the product or property, proper lifting and moving
are required.
12.Your product is intended for use in cool and dry conditions. You should avoid storage in
extreme cold, hot or damp areas as this may lead to corrosion and other related
problems.
13.This equipment is designed for indoor and home use only; It is not intended for
commercial use.

2
EXPLODED DIAGRAM
3
11
4
5
4
4
6
7
8
11
11
15
15
15
1
9
10
76
71
12
12
64
65
21
21
14
14
14
14
13
13
13
66
66
66
64
64
64
64 64
65
65
65
79
79
55
56
83
52L
58R
52R 51R
51L
84
68
78
78
78 78
78
78
78
38
60
54 59
75
75
6884
13
66
65
61
73
73
74
74
56
58L 64
65
21 43
77
76
49 48
89
86
41
70
70 82
40
40a
40b
37
87
87
91
90
90
91
39
81 72
67
88
82
2
76
32
31
78
92
42
76
82
82
62
28
28
50
6327
23
23
69
22
47
18 17
16
25 26
24
25
26
24
69
34
35 33
30
29
20 19
96
36
36
36
81
44
45
46
53
57
85
80
80
HARDWARE PACKAGE
#72 M5*10 1PC
#94 S13-S14-S15 1PC
#67 M10*35*15*H6 2PCS #37 M10*H9.5*S17 2PCS
#64 M8*40*20*S5 4PCS #65 φ8.4*φ16*1.6 4PCS
#95 S10-13-17-22
#93 S5-S6 1PC

3
PARTS LIST
No. Description Spec. Qty. No. Description Spec. Qty.
1 Seat Post 1 38 Belt 5PK*1320 1
2 Handlebar Post 1 39 Tablet Holder 219.5*101*75 1
3 Seat Slider 1 40 Computer TZ4117 1
4 Adjustment Knob M16*1.5 3 40a Computer Wire 1 1
5 Seat 98-2 1 40b Computer Wire 2 1
6 Rear Stabilizer 1 41 Handlebar (A) 1
7 Front Stabilizer 1 42 Inductor Seat LTF8163 1
8 Main Frame 1 43 Magnetic Bracket 1
9 Outer Belt Cover 648*264*45 1 44 Nut M8*S13 1
10 Decorative Cover 195*161*31 1 45 Wave Washer D17*Φ22*30 1
11 Bushing F38*F30*153.3 3 46 C-clip D17 1
12 Transportation
Wheel Φ42*18*Φ8*22 2 47 Nut M8 1
13 Foot Leveler Φ38*43/(M8*25) 4 48 Right Decorative
Cover 220*191*67 80g 1
14 End Cap 70*30*1.5 4 49 Left Decorative
Cover 220*191*67 80g 1
15 End Cap 30*30*1.5 3 50 Spacer Φ18*Φ12.12*53.6 1
16 Inertial Axle Φ16*Φ12*156 1 51L/R Pedal JG109 9/16” 2
17 Idler Wheel Shaft 1 52L/R Nylon Nut 9/16*20*H8*S19 2
18
Idler Wheel
Φ43*Φ34*24
1
53
Magnet
Φ15*7, LT-310
1
19 Washer 1 54 Middle Axle Φ17*166*42.5*74.
5*4-Φ10.1*Φ105 1
20
Screw
M6*10
1
55
Belt Wheel
Φ204*21*5PK
1
21
Nut
M8
3
56
Bearing
6203RS C&U
2
22 Bolt M8*55 1 57 Trunk Wire 1
23
Metal Plate
δ2.5
2
58L/R
Crank
170mm
2
24 Screw M8*10 2 59 Screw M10*16 4
25
Washer
2
60
Spacer
Φ22*Φ17.1*5.5
1
26
Washer
2
61
Bottle Holder
Φ73*215
1
27 Nut M12*1.25P*H6*S
19 1 62 Flywheel Φ463*75 1
28 Bearing 6001RS C&U 2 63 Spacer Φ18*Φ12.2*25.5 1
29 Spring Φ1.2*Φ13*44*N1
5 1 64 Screw M8*40*20*S5 7
30 Nut M10*H9.5*S17 1 65 Washer Φ8.4*Φ16*1.6 7
31 Bushing 17*17*99 1 66 Nut M8 4
32 Tension Control
Knob Φ10*246 1 67 Bolt M10*35*15*H6 2
33 Nut M10*H6*S17 1 68 Hex Nut M10*1.25 2
34 Plastic Cover 25*27*27 1 69 Cap Nut M12*1.25 2
35 Square Nut 15*15*25*M10 1 70 Screw M6*10 4
36 C-clamp 17*20 3 71 Washer 4
37 Nut M10*H9.5*S17 2 72 Screw M5*10 1

4
No. Description Spec. Qty. No. Description Spec. Qty.
73 Washer D5*Φ13*1 2 85 Inner Belt Cover 504*259*23 1
74
Screw
M5*15*Φ10
2
86
Handlebar (B)
1
75
Screw
M6*10*Φ12
2
87
Handle Pulse
2
76 Screw ST4.8*10*Φ8 11 88 Handle Pulse Wire 1
77
Magnet
30*20*10
6
89
Foam (A)
Φ23*Φ29*600
1
78 Screw ST4.2*13 9 90 Foam (B) Φ23*Φ29*420 2
79
Screw
ST4.2*16
3
91
Screw
ST4.2*15
2
80
Shipping Tube
2
92
Inductor
1
81 End Cap Φ25*1.5 2 93 Allen Wrench S5-S6 1
82
End Cap
Φ14*14
5
94
Spanner
S13-14-15
1
83 Cover for Middle
Axle Φ56*28 1 95 Spanner S10-13-17-22 1
84
Crank Cap
Φ25*7
2
96
Washer
Φ6.1*Φ9.3*t1.6
1
Ordering Replacement Parts (U.S. and Canadian Customers only)
Please provide the following information in order for us to accurately identify the part(s) needed:
The model number (found on cover of manual)
The product name (found on cover of manual)
The part number found on the “EXPLODED DIAGRAM” and “PARTS LIST” (found near the
front of the manual)
Please contact us at [e-mail] or 1- 877 - 90SUNNY (877-907-8669).

5
ASSEMBLY INSTRUCTIONS
We value your experience using Sunny Health and Fitness products. For assistance with parts or
troubleshooting, please contact us at [e-mail] or 1-877-90SUNNY
(877-907-8669).
#4 M16*1.5 1PC
8
8
1
1
4
4
STEP 1:
Pull out the Seat Post (No. 1) from Main
Frame (No. 8). Turn the Seat Post (No. 1) at
180° as left picture showed. Then re-insert
Seat Post (No. 1) into the sleeve located on
the Main Frame (No. 8). Adjust the Seat
Post (No. 1) to the desired position and
tighten with the Adjustment Knob (No. 4).
STEP 2:
Attach the Front and Rear Stabilizers (No. 7
&No. 6) to the Main Frame (No. 8) using 4
Screws (No. 64)and 4 Washers (No. 65).
Tighten and secure with Allen Wrench (No.
93).

6
We value your experience using Sunny Health and Fitness products. For assistance with parts or
troubleshooting, please contact us at [e-mail] or 1-877-90SUNNY
(877-907-8669).
51L 58L
S15
94
S15
94
S22 95
94
94
58R 51R
95 S22
S15
#95
S22 S15
#94
#52L/R 9/16*20*H8*S22 2PCS
#73 D5*φ13*1 2PCS
#74 M5*15*φ10 2PCS
51L 52L 52R 51R
51R
51L 58L
58R
52L
52R
61
73
74
73
8
32
58L 58R
S15
STEP 3:
WARNING! Read instructions carefully as improper
assembly may cause permanent damage to your
bike.
Note: The Pedals (No. 51L/R) are marked "L" and
"R" for Left and Right.
Remove the 2 Nylon Nuts (No. 52L/R) located on
the Pedals (No. 51L/R).
Turn the Tension Control Knob (No. 32)
CLOCKWISE as tightly as you can with your hand.
Align the Left Pedal (No. 51L) with the Left Crank
(No. 58L) at 90°. Turn the pedal bolt on the Left
Pedal (No. 51L) COUNTER-CLOCKWISE as tightly
as you can with your hand. Then, use Spanner (No.
94) to tighten and secure.
Turn the Left Nylon Nut (No. 52L) CLOCKWISEas
tightly as you can with your hand. Use Spanner
(No. 94) to hold the pedal bolt on the Left Pedal
(No. 51L) and use Spanner (No. 95) to turn the Left
Nylon Nut (No. 52L) CLOCKWISE at the same
time, until it is tightened onto the Left Crank (No.
58L).
Align the Right Pedal (No. 51R) with the Right
Crank (No. 58R) at 90°. Turn the pedal bolt on the
Right Pedal (No. 51R) CLOCKWISE as tightly as
you can with your hand. Then, use Spanner (No.
94) to tighten and secure.
Turn the Right Nylon Nut
(No. 52R)
COUNTER-CLOCKWISE as tightly as you can with
your hand. Use Spanner (No. 94) to hold the pedal
bolt on the Right Pedal (No. 51R)
and use
Spanner (No. 95) to turn the Right Nylon Nut (No.
52R) COUNTER-CLOCKWISE at the same time,
until it is tightened onto the Right Crank (No. 58R).
Remove 2 Screws (No. 74) and 2 Washers (No.
73) from the Main Frame (No. 8) using Spanner
(No. 94). Attach the Bottle Holder (No. 61) to the
Main Frame (No. 8) using the 2 Screws (No. 74)
and 2 Washers (No. 73)
that were removed.
Tighten and secure with Spanner (No. 94).

7
We value your experience using Sunny Health and Fitness products. For assistance with parts or
troubleshooting, please contact us at [e-mail] or 1-877-90SUNNY
(877-907-8669).
S15
#94
5
3
4
1
8
72
39
67 67
41
40
40a
40b
88
37
2
4
57
8
40a 40b
88 57
40
#72 M5*10 1PC
#67 M10*35*15*H6 2PCS
#37 M10*H9.5*S17 2PCS
S17 #95 #94
STEP 5:
Loosen and remove the [handlebar] Adjustment Knob
(No. 4). Insert Handlebar Post (No. 2) into the sleeve
located on the front of the Main Frame (No. 8). Adjust
the Handlebar Post (No. 2) to the desired position and
reinsert and tighten the Adjustment Knob (No. 4) to
secure the post in place.
Secure Handlebar A (No. 41)to Handlebar Post (No.
2) using 2 Bolts (No. 67) and 2 Nuts (No. 37). Tighten
and secure with Spanner (No. 95).
Remove Screw (No. 72) from Handlebar A (No. 41)
with Spanner (No. 94). Attach Tablet Holder (No. 39)
onto the Handlebar A (No. 41) with Screw (No. 72) that
was removed. Tighten and secure with Spanner (No.
94).
Attach the Computer (No. 40) to the bracket located on
the Handlebar Post (No. 2). Connect Computer Wire 1
(No. 40a) with Handle Pulse Wire (No. 88), and connect
Computer Wire 2 (No. 40b) with Trunk Wire (No. 57).
The assembly is complete!
STEP 4:
Loosen and remove the [seat slider] Adjustment
Knob (No. 4). Insert Seat Slider (No. 3) into the
Seat Post (No. 1). Adjust the Seat Slider (No. 3) to
the desired position, re-insert and tighten
Adjustment Knob (No. 4) to secure the post in
place.
Secure Seat (No. 5) to the Seat Slider (No. 3) with
Spanner (No. 94).
NOTE:
Before you fully tighten the seat, you can
adjust the front of the seat higher or lower to meet
your needs.

8
BATTERY INSTALLATION & REPLACEMENT
BATTERY INSTALLATION
1. Take out 2 AAA batteries from computer box.
2. Press the buckle of battery cover on the back of the Computer (No. 40), then remove battery
cover.
3. Install 2 AAA batteries into the battery case on the back of the Computer (No. 40). Pay
attention to the battery + and – ends before installing.
4. Press the buckle of battery cover, then put the battery cover back to the back of the Computer
(No. 40).
The installation is complete!
BATTERY REPLACEMENT
1. Press the buckle of battery cover on the back of the Computer (No. 40), then remove battery
cover.
2. Remove the 2 old AAA batteries in the battery case and install 2 new AAA batteries into the
battery case on the back of the Computer (No. 40). Pay attention to the battery + and – ends
before installing.
3. Press the buckle of battery cover, then put the battery cover back to the back of the Computer
(No. 40).
The replacement is complete!
NOTE: Always change both batteries at the same time. Do not mix battery types and do not mix
old and new batteries. Dispose batteries according to your state and regional guidelines.

9
EXERCISE COMPUTER
FUNCTION BUTTON:
MODE:
1. Press the button for selection function display value on LCD.
2. Press the button and hold for 2 seconds to reset all values except
odometer to zero.
Note: When the user replaces batteries, all the values will reset to ZERO
automatically.
OPERATIONS:
AUTO ON/OFF: The computer will show the workout value automatically as the user begins to
exercise. When the bike has become inactive or without any exercise over 4 minutes, the
computer will turn off and the workout value on the odometer will be held. While the user starts
the exercise again, the workout value on odometer will accumulate continuously.
AUTO SCAN: After the computer is powered on or the Mode button is pressed, the LCD will
display all function values: TMR-SPD-DIST-CAL-ODO-RPM-PUL (repeat). Every function will
display for 6 seconds.
FUNCTIONS:
SPD (SPEED): Displays the current speed being obtained. The range is from 0.0 to 99.9 MPH
(Mile per Hour).
DST (DISTANCE): Counts the total distance of an exercise from start to finish. The range is from
0.00 up to 9999 M (Mile).
TMR (TIME): Counts the total time of an exercise from start to finish. The range is from 00:00 up
to 99:59.
CAL (CALORIES): Counts the total amount of calories burned during an exercise from start to
finish. The range is from 0.0 to 9999 KCAL. (The data is a rough guide which cannot be used in
medical treatment.)
ODO (ODOMETER): Displays the total amount of distance from the first use. The range is from
0.0 to 9999 M (Mile). User also can press the mode key to display the odometer value.
RPM: Counts each stroke within a minute. The range is from 0 to 400.
PUL (PULSE):Displays the user's heart rate in beats per minute during training. (The data is a rough
guide which cannot be used in medical treatment.)
NOTE: please put your hands on the hand pulses when in PULSE function.
Note:
1. If the computer display is abnormal, please re-install the batteries and try again.
2. Battery Spec: 1.5V UM-4 or AAA (2PCS).
3. The batteries must be removed from the appliance before it is disposed.

10
ADJUSTMENTS & USAGE GUIDE
13 66
ADJUSTING THE BALANCE
In order to achieve a smooth and comfortable ride, you must ensure that the
bike is stabled and secured. If you notice that the bike is unbalanced during
use, you should adjust the Foot Levelers (No. 13)located beneath the
front and rear stabilizers. To do so, simply rotate the Foot Leveler (No. 13)
until the bike becomes levelled
with the floor surface. If required, repeat this
process to adjust the remaining foot levelers.
32
ADJUSTING THE TENSION & EMERGENCY STOP
Adjust the tension by rotating the Tension Control Knob (No. 32)
clockwise to increase the level of resistance. Rotate the
Tension Control
Knob (No. 32)counter-clockwise
to decrease the level of resistance. Push
down on the Tension Control Knob (No. 32)to enforce the brake and stop
the bike immediately.
S14
ADJUSTING THE ANGLE OF SEAT
Use Spanner (No. 94)
to unscrew the nut under the seat. Adjust the seat to
the desired angle and reinstall the nut. Check the nut periodically to ensure
that it is tight and secure. Use the Spanner (No. 94)
to tighten when
necessary.
Note: You will need to tighten the nut on the opposite side at the same time.
The use of an additional spanner is required.
12
7
41
4
MOVING THE BIKE
To move the bike, first ensure that the handlebar is properly secured. If the
handlebar is loose, tighten the Adjustment Knob (No. 4) to secure it. Next,
stand in
front of the bike so that you’re directly in front of the handlebar.
Firmly grasp and hold each side of the handlebar, place one foot on the
Front Stabilizer (No. 7)
, and tilt the bike towards you until the
Transportation Wheels (No. 12) on the Front Stabilizer (No. 7) touches
the ground.With the wheels on the ground, you can transport the bike to the
desired location with ease.
44
32 32
ADJUSTING THE HEIGHT
Loosen and pull out the [seat height] Adjustment Knob (No. 4)
to adjust
the height of the seat. You may also slide the seat forward or backwards by
loosening and pulling out the [seat] Adjustment Knob (No. 4) on the Seat
Slider (No. 3)
. You may adjust the height of the handlebar by using the
[handlebar] Adjustment Knob (No. 4). When adjusting, you will see a limit
on the seat post, seat slider, and handlebar post. Do NOT lift the posts
passed this mark. Always check the Adjustment Knob (No. 4)
to ensure
that it is fully secured when you finish making an adjustment.
III
4444
3
3
2

11
MAINTENANCE INSTRUCTIONS
This is general information for daily, weekly, and monthly maintenance to be performed on your bike.
DAILY MAINTENANCE
After each exercise
session, wipe down all the
equipment: seat, frame, and handlebars. Pay
special attention to the seat post, handlebar
post, and belt/chain guard. Sweat is very
corrosive and may cause problems that require
parts replacement later.
1. Get on the bike and engage the drive train.
2.
Pay attention to any vibrations felt through
the pedals. If you feel any vibrations, you
may need to tighten the pedals, bottom
bracket, or adjust the drive belt/chain
tension.
3. Use a wrench to tighten the pedals until
they are secure.
MONTHLY MAINTENANCE
1.
Check if all hardware is secure, such as: bottle
holder, flywheel nuts, belt/chain guard bolts,
brake caliper lock nuts, and brake caliper
tension rod nuts.
2.
Inspect the brake tension rod for signs of wear
such as missing threads. Clean
and lubricate
the brake tension rod.
3.
Clean and lubricate the seat post, handlebar
post and seat slider. Remove any built
up of
foreign material.
WEEKLY MAINTENANCE
1.
Inspect moving parts and tighten the
hardware.
2. Inspect pull pin frame fittings to make sure
the fittings are secure. Loose frame fittings
may strip out threads over time and cause
extensive damage.
3.
Clean and lubricate pop pin assemblies.
Pull on the pin and spray a small amount of
lubricant onto the shaft.
4. Tighten the seat hardware to make sure
the seat is level and centered.
5.
Brush and treat the resistance pads.
Remove any foreign material that may
have collected on the pads. Spray the pads
with silicone lubricant. This helps to reduce
noise from friction between the pads and
the flywheel.
6.
Visually inspect the bottom bracket, toe
clips and toe straps. If any of them are
loose or disconnected, attach and tighten.
LEATHER BRAKE PAD CARE (If applicable)
1.
Perform this maintenance when the brake pad
is first installed and for the life of the brake
pad. Following these simple guidelines can
increase the life of your brake pads.
2.
Some brake pad assemblies are
pre-
lubricated. Squeeze the brake pad. If
lubricant is released, then the pad has been
pre-lubricated.
3. If the brake pad is dry, then coat the brake pad
with 3-n-
1 oil. Brush the leather with a clean,
wire bristle brush, and then apply the oil. The
oil should be allowed to soak in
to the pad.
Repeat 4-
5 times until the pad is saturated, but
not dripping with oil. When the pad is
saturated, it will no longer absorb oil.
4.
Inspect the brake pad weekly and lubricate if
needed. The pad should not have a glazed
appearance. If the pad appears glazed, then
brush it with wire brush and apply lubricant as
needed. If any of the sponge padding is
showing throu
gh the leather pad, the brake
pad should be replaced.
Version: 2.1