Precor 5.17 User manual

5.17 Elliptical Fitness Crosstrainer
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5.17 Elliptical Fitness Crosstrainer
Warning: This service manual is for use by Precor trained service providers only.
IfyouarenotaPrecorTrainedServicer,youmustnotattempttoserviceanyPrecorProduct;
Call your dealer for service.
This document contains information required to perform the majority of troubleshooting, and
replacement procedures required to repair and maintain this product.
This document contains general product information, software diagnostic procedures (when
available), preventative maintenance procedures, inspection and adjustment procedures,
troubleshooting procedures, replacement procedures and electrical block and wiring diagrams.
To move directly to a procedure, click the appropriate procedure in the bookmark section to the
left of this page. You may “drag” the separator bar between this page and the bookmark section
to change the size of the page being viewed.
© 2003 Precor Incorporated
Unauthorized Reproduction and Distribution Prohibited By Law
20039-123

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Section One - Things You Should Know
System Information
The 5.17 disables lift (ramp) operation and changes in resistance levels when the unit is not in
use. In order for ramp and resistance levels to be selectable the unit must be in use, that is, the
system must be receiving a normal pulse from the reed switch speed sensor.
The 5.17 EFX operates from a 12 Vdc source. An AC to DC power adapter is provided with the
EFX. See Diagram 1.1.
Diagram 1.1 - Power Adapter
Right, Left, Front, and Back Conventions
In this manual, right, left, front, and back are from the perspective of a user standing on the EFX
5.17, facing the display enclosure.
Warning and Caution Statements and General Safety Guidelines
Warning statements indicate a particularly dangerous activity. Warning statements you will find in

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this manual include:
• To remove power from the EFX 5.17, the power adapter’s power cord must be disconnected
from the wall outlet. Always ensure that the EFX 5.17 power adapter is unplugged from the
wall outlet when you inspect or adjust the EFX 5.17, or when you isolate, remove, or replace
a EFX 5.17 component.
• Removing the covers exposes high voltage components and potentially dangerous
machinery. Exercise extreme caution when you perform maintenance procedures with the
hood removed.
• During service operations you will be very close to moving machinery and high voltage
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 EFX 5.17
operation.
Caution statements are intended to prevent damage to the EFX 5.17 as a result of the current
activity. Caution statements included in this manual are listed below:
• Notice the orientation notch on the PROM. These components must be positioned with the
same notch orientation.
Safety guidelines you should know and follow include:
• Read the owner’s manual and follow all operating instructions.
• Visually check the EFX 5.17 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 EFX 5.17.
• When operating the EFX 5.17, 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 EFX 5.17.
• To prevent electrical shock, keep all electrical components, such as the power cord and
circuit breaker away from water and other liquids.
• Do not use accessory attachments that are not recommended by the manufacturer-such
attachments might cause injuries.

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General Information
For the latest exploded view, part number and part pricing information, visit the Precor dealer
website at “www.precor.com/Dealer.
Required Tools and Equipment
The following list is a summary of the tools and equipment required when you service Precor’s
EFX 5.17.
TOOLS EQUIPMENT
phillips and flat-head screwdrivers anti-static wrist strap
digital multimeter
standard and metric allen wrench sets
open-end wrench set Supplies
blue loctite
drive ratchet and ratchet set cable ties
chip puller Spares
rubber mallet interconnect cables
snap ring pliers
torque wrench
belt gauge (part # 20030-117)

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Section Two - Preventive Maintenance
Preventive maintenance measures are either scheduled or unscheduled. Scheduled preventive
maintenance activities are included here so that you are aware of preventive measures
performed on a regular basis.
Regular Preventive Maintenance (Owner)
Cleanliness of the EFX 5.17 and its operating environment will keep maintenance problems and
service calls to a minimum. Precor recommends that you perform the following preventive
maintenance schedule.
At the End of Each Day
Wipe down the stairarms, ramps, wheels and frame with a damp cloth.
Every Week
Wipe the surface of the electronic console with a slightly-damp sponge or soft cloth. Dry with a
clean towel.
CAUTION
Keep water away from electronic components to prevent shock.
On-Site Preventive Maintenance (Service Technician)
Perform the following preventive maintenance tasks each time you are called to service an EFX
5.17:
Examine the belts for wear, cracks or other signs of deterioration and replace if necessary.
Visually examine all wires and check connectors and wire connections. Secure connections and
replace wiring as necessary.

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Section Three - Checking EFX 5.17 Operation
This section provides you with a quick method of checking EFX operation. Check the operation
of the EFX at the end of most maintenance procedures.
Procedure
1. Plug the power adapter’s power cord into the wall outlet, the power adapter’s jack into the
EFX 5.17 and set the on/off switch in the “on” position.
2. Select Resistance Level 1.
3. Operate the EFX for 4–5 minutes. As you operate the EFX, concentrate on the operating
sounds made by the unit. Be on the alert for unusual rubbing, hitting, grinding, or squeaking
noises.
4. If the EFX makes unusual noises or the electronic display does not change appropriately,
troubleshoot per section 6.
5. Press the RESISTANCE key until you reach Resistance Level 5. Operate the EFX for
another 2–3 minutes.
6. If the EFX resistance does not change or the operation of the EFX feels inconsistent
compared with Resistance Level 1, troubleshoot per section 6.
7. Press the RESISTANCE key until you reach Resistance Level 10. Operate the EFX for
another 2–3 minutes.
8. If the resistance of the EFX 5.17 does not change or the EFX operation feels inconsistent
with Resistance Levels 1 and 5, troubleshoot per Procedure 6.5.
9. Press the CROSSRAMP key while viewing the electronic console. Confirm that the foot
pads incline and the ramp display increments to 7 as the CROSSRAMP key is pressed.
10. Press the CROSSRAMP  key while viewing the electronic console. Confirm that the foot
pads return to the lowest position and the ramp display decrements to 1 as the
CROSSRAMP key is pressed.
11. If the ramp system of the EFX 5.17 does not operate properly, troubleshoot per Procedure
6.4.
12. Turn off the EFX with the circuit breaker, then unplug the power adapter’s power cord from
the wall outlet.

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Procedure 4.1 - Calibrating the Lift Motor
1. In order to calibrate the lift motor, it is necessary to disconnect the lift motor from the ramp
assembly.
2. Set the on/off switch in the “off” position. Remove the six screws that retain the front half of
the front cover to the rear half of the front cover and remove the front half cover.
3. Remove the retaining clip from each lift nut mounting pin. Support the lift ramp assembly
and remove the lift mounting pins from the lift nut. Raise the ramp and support it from the
handlebars using a bungi cord (See Diagram 4.1).
Diagram 4.1 - Supporting the Ramp
4. Connect a DC voltmeter between the blue and brown wires of the lift motor connector. Set
the on/off switch in the on position. Operate the ramp until the DC voltmeter reading is as
close to 1.1 VDC as possible. Set the on/off switch in the off position. Set the meter, while
still connected between the blue and brown wires, to read ohms. Grasp the lift motor drive
screw and rotate it until the ohmmeter reads 240Ω(See Diagram 4.2)
5. Rotate the lift nut on the lift motor drive screw until the distance between the top surface of
the lift nut and the top of the lift motor drive screw is three inches. If the lift motor drive screw
is allowed to rotate while lift nut is being positioned, the ohmmeter will no longer read 240Ω.
The lift calibration number must be 240Ω. The distance measurement must be correct and
the ohmmeter must read 240Ω for the lift calibration to be correct.

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Diagram 4.2 - Lift Motor Mounting
6. Remove the bungi cord from the ramp and set the ramp at it’s mounting position. Do not
rotate the lift nut any more than is necessary to align the holes in the lift nut with the holes in
the ramp. Replace both lift nut mounting pins. Replace both retaining clips on the lift nut
mounting pins.
7. Set the on/off switch in the “on” position. Thoroughly test all lift related functions per Section
Three.
8. Set the on/off switch in the “off” position, replace the front cover per Procedure 6.1.
3.00”
Lift Nut Pin
Lift Nut
Retaining Clip
Lift Nut
Lift Motor
Drive Screw
Lift Motor

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Procedure 4.2 - Inspecting and Adjusting Belt Alignment and
Tension
Procedure
1. Set the on/off switch in the “off” position.
WARNING
Before continuing with this procedure, review the Warning and Caution statements listed in
Section One, Things You Should Know.
2. Remove the rear cover as described in Procedure 6.1.
3. Operate the unit by rapidly rotating a crankarm by hand. As the unit operates watch the
drive belts for proper alignment. The belts should operate parallel to each other and the
belts should maintain even spacing.
4. If the belts are not correctly aligned...
THEN... OTHERWISE...
Continue with the next step. Skip to step 13
5. Refer to Diagram 4.3 for the following belt alignment steps.The right and left tension bolts
have locking tabs. If necessary, use pliers to bend the locking tabs out of the way so that the
bolts can be turned.
6. If the step up pulley belt is out of alignment to the right, continue with step 8.
7. If the step up pulley belt is out of alignment to the left, continue with step 10.
8. Turn the left tension bolt 1/4 turn clockwise, then repeat step 3. If turning the left adjustment
bolt 1/4 of a turn was not sufficient, turn the right tension bolt 1/4 of a turn counterclockwise.
9. Repeat step 8, alternating between the left and right tension bolts until the alignment is
correct. Continue with step 13.
10. Turn the right tension bolt 1/4 of a turn clockwise, then repeat step 3. If turning the right
adjustment bolt 1/4 of a turn was not sufficient, turn the left tension bolt 1/4 turn
counterclockwise.
11. Repeat step 10, alternating between the right and left tension bolts until the alignment is
correct.
12. Belt tension must now be checked and if necessary corrected. Remember, if it is necessary
to change the belt tension, the belt alignment must be maintained.

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Diagram 4.3 - Drive Unit
13. Place a belt gauge (McMaster-Carr 6160K12 or Grainger 3HX33) in the middle of the step
up belt and the center of the belt span (see Diagram 4.4). Lay a straight edge along the
length of the belt and beside the belt gauge. Slide one of the o-rings up against the shoulder
of the belt gauge. Press downward on the belt gauge, causing the belt to deflect. Read the
deflection on the belt gauge at the edge of the straight edge. Deflect the belt 1/2”. Read the
tension across the top edge of the o-ring. If the belt is correctly tensioned the gauge will
read between 14 and 16 pounds.
14. If the tension in step 13 is correct skip to step 18. Otherwise continue with the next step.
Step up
Belt
Brake
Input
Belt