Service Manual
UBK13/ UBK13 BASE SERVICE
MANUAL
20039-174 REV A
Vertical Upright & Recumbent Bicycles
PRECOR CUSTOMER SUPPORT
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 1
Contents
About This Document .............................................................................................. 2
Right, Left, Front, and Back Conventions ..................................................................................................................... 2
Safety...................................................................................................................................................................................... 3
Warning and Caution Statements and General Safety Guidelines....................................................................... 4
General Information ........................................................................................................................................................... 4
Required Tools and Equipment ............................................................................. 5
Preventive Maintenance - Bikes ............................................................................ 6
Regular Preventive Maintenance (Owner) ................................................................................................................. 6
Quarterly Maintenance ........................................................................................................ 7
On-Site Preventive Maintenance (Service Technician) .......................................................................................... 7
Checking the Bicycle Operations ......................................................................... 8
Primary Belt Tension Adjustment .................................................................................................................................. 9
Adjusting the Seat Carriage - RBK Only ..................................................................................................................... 10
RBK13/UBK13 Base Troubleshooting .................................................................. 12
Display does not Illuminate ........................................................................................................................................... 12
No or Incorrect Pedaling Resistance ........................................................................................................................... 13
RBK13/UBK13 Base Replacement Procedures ................................................ 16
Replacing the Covers - UBK13 ....................................................................................................................................... 16
Replacing the Covers - RBK13 ....................................................................................................................................... 21
Replacing a Primary Drive Belt ..................................................................................................................................... 25
Replacing a Crankarm .................................................................................................................................................... 26
Replacing the Primary Pulley ........................................................................................................................................ 28
Replacing the Input Pulley and Axle Assembly ........................................................................................................ 31
Replacing the Idler Pulley .............................................................................................................................................. 36
Replacing a Generator .................................................................................................................................................... 38
Replacing a Battery ........................................................................................................................................................... 41
Replacing the lower PCA ............................................................................................................................................... 42
Replacing the Seat Post Pop-Pin - UBK13 Only ....................................................................................................... 44
Replacing the Seat Post - UBK Only ........................................................................................................................... 46
Replacing a Seat Post Component - UBK Only ....................................................................................................... 48
Replacing All or Part of a Seat Carriage - RBK only ................................................................................................ 51
Wire and Block Diagrams ...................................................................................... 56
Block Diagrams ................................................................................................................................................................. 57
Wire Diagrams ................................................................................................................................................................. 58
Index ............................................................................................................................ 59
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 1
General Information ....................................................................................................... 4
Section One
About This Document
In This Section
Right, Left, Front, and Back Conventions.................................................................. 2
Safety ................................................................................................................................. 3
Warning and Caution Statements and General Safety Guidelines ................... 4
Right, Left, Front, and Back
Conventions
In this manual, right, left, front, and back are form the perspective of a user operating the equipment
facing the console.
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 2
Safety
Safety guidelines you should know and follow include:
♦ Read the owner’s manual and follow all operating instructions.
♦ Operate the equipment on a solid, level surface with the unit properly leveled. The equipment is
properly leveled when the feet are in contact with the floor. Visually check the equipment before
beginning service or maintenance operations. If it is not completely assembled or is damaged in any
way, exercise extreme caution while operating and checking the equipment.
♦ When operating the equipment, do not wear loose clothing. Do not wear shoes with heels or
leather soles. Check the soles of your shoes and remove any embedded stones. Tie long hair back.
♦ Do not rock the unit. Do not stand or climb on the handlebars, display enclosure, or cover.
♦ Do not set anything on the handlebars, display enclosure, or cover. Never place liquids on any part
of the equipment while performing service.
♦ To prevent electrical shock, keep all electrical components away from water and other liquids.
♦ Do not use accessory attachments that are not recommended by the manufacturer-such
attachments might cause injuries.
♦ Units equipped with Personal Viewing Screens will have external power supply and coaxial cable
routed through the bottom of the unit to the top of the display console. Cord management must be
maintained.
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 3
Warning and Caution
Statements and General Safety
Guidelines
Warning statements indicate a particularly dangerous activity. Warning statements you will find in this
manual include:
♦ Self powered units, it will either be necessary to either equip the unit with the optional external
power supply or have an assistant pedal on the unit while voltage measurements are being taken.
Because of the danger of working on the unit while it is in motion using the optional external power
supply is strongly recommended.
♦ When the unit is used, crank arms are in motion; the generator will operate and produce potentially
hazardous voltages even when the battery is disconnected.
Caution statements are intended to prevent damage to the equipment as a result of the current
activity. Caution statements included in this manual are listed below:
♦ When it is necessary to lift or move the equipment, ensure that the equipment has adequate
support and that you use proper lifting techniques.
♦ To remove power from the equipment, the optional external power supply (when equipped) must
be disconnected from the wall outlet and the red (positive) wire must be disconnected from the
battery. Always ensure that the equipment external power supply is unplugged from the wall outlet
and the red (positive) wire is removed from the battery when you inspect or adjust the equipment,
or when you isolate, remove, or replace an component.
♦ Removing the covers exposes high voltage components and potentially dangerous machinery.
Exercise extreme caution when you perform maintenance procedures with the cover(s) removed.
♦ During service operations you will be very close to moving machinery and voltage bearing
components. When you perform maintenance procedures with the covers removed, remove
jewelry (especially from ears and neck), tie up long hair, remove neck ties, and do not wear loose
clothing.
♦ Exercise caution when touching any wire or electrical component during equipment operation.
General Information
For the latest exploded view, part number and part pricing information, visit the Precor dealer website
at www.precor.com/connection.
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 4
S ection Two
Required Tools and
Equipment
The following is a summary of the tools and equipment that may be required when you service Precor
Equipment.
Tools
♦ Phillip and flat-head screwdrivers
♦ Metric allen wrench set
♦ Open-end metric wrench set
♦ Metric socket wrench set
♦ Snap ring pliers
♦ Drive belt tension gauge
♦ Park Too CCP-22 crankarm puller or Shimano TL-FC10 Crankarm puller
Equipment
♦ Anti-static kit
♦ Digital multimeter
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 5
On-Site Preventive Maintenance (Service Technician) ....................................... 7
Section Three
Preventive Maintenance -
Bikes
In This Section
Regular Preventive Maintenance (Owner) .............................................................. 6
Preventive maintenance measures are either scheduled or unscheduled. Scheduled preventive
maintenance activities are included here so that you are aware of the preventive measures preformed
on a regular basis.
Regular Preventive
Maintenance (Owner)
Cleanliness of the cycle and its operating environment will keep maintenance problems and service
calls to a minimum. Precor recommends that you perform the following preventive maintenance
schedule.
After Each Use
♦ Turn off and, unplug power adapter (if equipped) from the bicycle.
♦ Wipe down the covers, handlebars, seat and pedals with a damp cloth.
Daily Maintenance
♦ Clean the bicycle's frame, covers, seat and pedals using a water damped cloth. Wipe the surface of
the electronic console with a damp sponge or soft cloth. Dry with clean towel.
Weekly Maintenance
♦ Clean underneath the bicycle, following these steps:
1 Turn off the bicycle with the on/off switch, then unplug it from the power adapter (if equipped).
2 Move the bicycle to gain access to the floor directly underneath the bicycle.
3 Vacuum the rug or damp mop the floor.
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 6
4 Make sure the floor is dry before returning the bicycle to its original position.
Quarterly Maintenance
1 Remove the covers.
2 Thoroughly clean inside the bicycle. Use a vacuum cleaner and damp rag to remove all the dust
particles, etc.
3 Check the belt tension per procedure,
Primary Belt Tension Adjustment
(on page 9).
On-Site Preventive
Maintenance (Service
Technician)
When you are called to service a bicycle perform these preventive maintenance activities:
♦ Perform the software diagnostics. Check LED and keypad functions. Record the odometer reading.
For more information, consult the console service manual equipped with your equipment.
♦ Visually inspect the drive belts for cracks, fraying or excessive wear.
♦ Visually examine all wires and check connectors and wire connections. Secure connections and
replace wiring as necessary.
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 7
Adjusting the Seat Carriage - RBK Only ................................................................... 10
Section Four
Checking the Bicycle
Operations
In This Section
Primary Belt Tension Adjustment .............................................................................. 9
This section provides you with a quick method of checking operation.
Procedure
1 Start pedaling.
2 With the banner displayed, press QUICK START.
3 The resistance will start at Level 1.
4 Operate the RBK13/UBK13 for 4–5 minutes. As you operate the bike, concentrate on the operating
sounds made by the unit. Be on the alert for unusual rubbing, hitting, grinding, or squeaking noises.
5 Press the RESISTANCE key until you reach Resistance Level 10. Operate the RBK13/UBK13 for
another 2–3 minutes.
6 If the electronic display does not change appropriately, reference per the, Standard Console service
manual.
7 If the resistance does not change or the operation of the bike feels inconsistent compared with
Resistance Level 1, troubleshoot per procedure, No or Incorrect Pedaling Resistance .
8 Press the RESISTANCE key until you reach Resistance Level 20. Operate the bike for another 2–3
minutes.
9 If the resistance of the bike does not change or operation feels inconsistent with Resistance Levels 1
and 20, troubleshoot per procedure, No or Incorrect Pedaling Resistance.
10 Check the LED’s mounted on the upper PCA and the function keys displayed on the electronic
console by performing the diagnostics test in the Standard Console service manual.
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 8
Figure 1: Belt Gauge
Figure 2: Drive Belt Adjustment
Primary Belt Tension
Adjustment
1 Remove the covers as per Procedure
Covers - RBK13
2 Place the belt tension gauge on the primary drive belt.
3 The correct belt tension is 70 ± 5 pounds. If the belt tension is correct replace the covers. If the belt
tension is incorrect, continue to the next step.
(on page 21).
Replacing the Covers - UBK13
(on page 16) or
Replacing the
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 9
4 Slightly loosen the three 4mm idler pulley bracket mounting bolts. The belt tension cannot be
adjusted if the idler pulley bracket mounting bolts are tightened.
5 Loosen the adjustment bolt lock nut.
6 Turn the adjustment bolt clockwise or counter clockwise as required until the gauge is in the range
of 70 ± 5 pounds.
7 Remove and then replace the belt tension gauge on the primary drive belt. If the belt tension is out
range, repeat steps 5 and 6 until the belt tension is in range. If the belt tension is within range,
continue to the next step.
8 Tighten the three 4mm idler pulley bracket bolts. Note: Do not over tighten the bolts, if the bolts
are over tightened it is possible to damage the mounting hole threads of the generator. If by
chance the threads do become damaged, the idler pulley bracket can be removed and flipped
over 360 degrees and reinstalled. Doing this will allow the use of another set of mounting
holes on the generator.
9 Tighten the adjustment bolt lock nut.
10 Replace the covers.
Adjusting the Seat Carriage RBK Only
Perform this procedure if the front to rear movement of the seat is too tight or there is excessive side to
side seat wobble.
1 The end of the adjustment bolts are designed with two flat sides so that an open end wrench can
be used to rotate the bolt. Using a 10mm wrench on the adjust bolt, use a 22mm wrench to loosen
the two lock nuts on the left and right side just enough so the adjust bolt can be turned freely.
2 The seat carriage wheel is mounted on the adjustment bolt, which is offset. The offset bolt enables
the wheel to be tightened or loosened against the seat rail. Perform half of the adjustment using the
right hand adjustment bolt and half of the adjustment using the left hand adjustment bolt. Rotate
the adjust bolt counterclockwise until it just makes contact with the seat rail then turn it an
additional 1⁄8 turn. Hold the 10mm wrench at this position and firmly tighten the lock nut.
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 10
Figure 3: Seat Carriage Adjustment Bolts
3 When the seat is properly adjusted, the angle of the rotation of both adjustment bolts should be
approximately the same. The seat should not wobble side to side and should move forward and
backward easily. If the seat still wobbles side to side, repeat step 2 but increase from 1⁄8 turn to ¼
Note:Tightening any further may result in accelerated wheel and bearing wear.
turn.
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 11
No or Incorrect Pedaling Resistance ......................................................................... 13
Section Five
RBK13/UBK13 Base
Troubleshooting
In This Section
Display does not Illuminate ......................................................................................... 12
Display does not Illuminate
Note:
In order to conserve battery power when the cycle is not in use, a time out feature is incorporated in
the cycles software. If the cycle is not used (motion not detected by the speed sensor), when in the
program mode, approximately 15 seconds later, the cycle will “power down” The bike will “power up”
again when pedaling is resumed (motion detected by the speed sensor). In order to measure voltages
in the unit it is necessary to keep the unit powered up. This can be accomplished either by pedaling on
the unit or by installing the optional external power adapter.
1 Attach the anti-static wrist strap to your arm, then connect the ground wire of the wrist strap to
the units frame.
2 Pedal on the cycle for a minimum of 5 seconds. The system monitors one of the three phase
generator windings for AC zero cross. The monitoring system notes every time the generator AC
voltage passes through zero volts. By counting the zero cross rate, the system knows how fast the
generator is turning. The system calculates the user RPM from the generator speed. If the system
does not see a zero cross rate, it assumes the bike is not being used and the display will not
illuminate when the bike is pedaled.
3 Disconnect the generator leads from terminals M3 (Red) and M4 (Black) on the lower PCA.
Connect a AC voltmeter to the leads removed from terminals M3 and M4. Pedal the bike at about
60 RPM (1 rotation per second), the voltmeter should read approximately between 80Vac and 120
Vac. If the voltage reading is absent or extremely low, replace the generator.
voltage will vary depending on the speed the crankarms are rotating. If you are trying to
measure the voltage and rotate the crankarm at the appropriate RPM may be difficult. It is
recommended that you have someone assist with pedaling the bicycle while taking this
voltage measurement. Use extreme caution by staying clear of the bicycles moving parts
while taking the voltage measurement.
Note: The output
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 12
Figure 4: Lower PCA Connectors
4 If the voltage reading in step 3 was normal, replace the lower PCA. If the lower PCA did not correct
the problem, continue with step 5.
5 With the unit powered up, measure between test point 24 and test point 37 for approximately 7.5
Vdc. If the measurement is correct, skip to step 8.
6 If the measurement in step 5 is significantly low or high, disconnect the interconnect cable from the
J2 connector and repeat the measurement in step 5.
7 If the measurement in step 5 is still significantly low or high, replace the lower PCA. If replacing the
lower PCA does correct the problem, skip to step 8.
8 Remove the upper display panel and disconnect the interconnect cable form the upper PCA. With
the unit powered up, check the voltage between the outer two pins of the interconnect cable for DC
volts. It should read approximately 7.5 Vdc. Note: The interconnect pins can be difficult to get good
connections with the meter leads. If the voltage is absent or significantly low, troubleshoot the
interconnect cable.
9 If the voltage measurement in step 5 is correct, replace the upper PCA.
If you have performed all of the previous tests and have not been able to locate the trouble, call Precor
customer support.
No or Incorrect Pedaling
Resistance
1 If the display is not illuminated, go to Procedure, Display does not Illuminate.
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 13
Figure 5: Lower PCA Connectors
2 Enter the "manual" program and set the work level at "level 20". Pedal the cycle and confirm that
there is no resistance or that the resistance is abnormally low.
Note:
The voltage readings in this procedure will vary with the pedaling rate. Pedal the cycle at approximately
60 RPM with the work level set at "10" while taking the voltage readings in this procedure. Resistance
readings must be taken with the power off and the cycle idle.
3 Measure the DC voltage at the terminals M1 and M8 of the lower PCA. The voltage reading should
be approximately 11 Vdc. If the reading is significantly low, or significantly high, skip to step 5.
4 If the reading in step 3 was correct, the pedaling resistance should be correct, skip back to step 2.
5 Disconnect the eddy current magnet wires from terminals M1 and M8 of the lower PCA. Measure
between the eddy current magnet wires with an ohmmeter. It should read approximately 10
Ω (ohms).
6 If the measurement in step 5 was significantly high or low, replace the generator.The eddy current
magnet is furnished with the generator. After replacing the generator, tension the primary belt as
per procedure,
Primary Belt Tension Adjustment
7 If the measurement in step 5 was correct, replace the lower PCA.
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 14
(on page 9).
Figure 6: Lower PCA Cables
8 It is highly unlikely that the RPM reading could be present but incorrect. If this condition should
occur, replace the lower PCA
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 15
Replacing All or Part of a Seat Carriage - RBK only ............................................... 51
Section Six
RBK13/UBK13 Base
Replacement Procedures
In This Section
Replacing the Covers - UBK13 ..................................................................................... 16
Replacing the Covers - RBK13 ..................................................................................... 21
Replacing a Primary Drive Belt .................................................................................... 25
Replacing a Crankarm ................................................................................................... 26
Replacing the Primary Pulley ....................................................................................... 28
Replacing the Input Pulley and Axle Assembly ...................................................... 31
Replacing the Idler Pulley ............................................................................................. 36
Replacing a Generator ................................................................................................... 38
Replacing a Battery ........................................................................................................ 41
Replacing the lower PCA .............................................................................................. 42
Replacing the Seat Post Pop-Pin - UBK13 Only ...................................................... 44
Replacing the Seat Post - UBK Only .......................................................................... 46
Replacing a Seat Post Component - UBK Only ....................................................... 48
Replacing the Covers - UBK13
Top Cover Removal
1 Remove the left side screw and the right side screw that secures the top cover.
2 Lift and remove the top cover.
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 16
Left Side Cover Removal
3 Move the pedal to its highest position in its rotation.
4 Remove the six screws that secure the left side cover to the frame.
5 Pull and remove the left cover.
Right Cover Removal
6 Move the pedal so that it is at the top of its rotations.
© Precor Incorporated, Unauthorized Reproduction and Distribution Prohibited by Law Page 17
Loading...