Replacing the Lift Motor Capacitor
Contents
1. THEN OTHERWISE Continue with the next step to Skip to Step 38 replace the upper limit switch skip to step 31 to replace the down limit switch or skip to Step 35 to replace the zero sense switch Replacing the Upper Lift Limit Switch 27 28 29 30 Position the limit switch at its mounting location Replace the screws and washers that secure the limit switch to the switch bracket Connect the red wires disconnected in Step 3 to the limit switch terminals If you are replacing more than one limit switch THEN OTHERWISE Continue with the next step to Skip to Step 38 to replace the down limit switch or skip to Step 35 to replace the zero sense switch Replacing the Down Lift Limit Switch 31 32 33 34 Position the limit switch at its mounting location Replace the screws and washers that secure the limit switch to the switch bracket Connect the black wires disconnected in Step 6 to the limit switch terminals If you are replacing the zero sense switch C960 Series Commercial Treadmill THEN OTHERWISE Continue with the next step Skip to Step 38 Replacing the Zero Sense Switch 35 36 37 38 39 Position the limit switch at its mounting location Replace the screws and washers that secure the limit switch to the switch bracket Connect the blue wires disconnected in Step 9 to the switch terminals Calibrate the lift assembly as described in Procedu2. 3A 6 Remove the bolt s and nut s that secure the lift platform to the treadmill frame Remove the lift platform C960 Series Commercial Treadmill Diagram 6 3A Lift Shaft Orientation REAR FRONT lt _ gt Lift Platform Pin Lift Shaft Flat Side C960 Series Commercial Treadmill Diagram 6 3B Lift Platform Actuator Block Lift Platform Lift Motor Replacing the Lift Platform 7 8 With the treadmill still on its right side position the lift platform at its mounting position Replace the bolt s and nut s that secure the lift platform to the treadmill frame Perform this step on C962i and C964i treadmills only Replace the lift shaft Replace the retaining ring Orient the lift shaft into the position it was in when removed in step 5 With the lift platform rotated to the front of the treadmill the flat side of the lift shaft will face to the rear of the treadmill when correctly oriented See Diagram 6 3A Align the hole in the lift platform with the hole in the lift shaft and replace the pin Carefully tap the pin into place with a mallet or hammer Slide the coupler onto the the lift shaft and replace the lift potentiometer Align the flat side of the lift potentiometer shaft with the flat side of the lift shaft and and position the lift potentiometer so that the locator tab on the lift potentiometer fits into the locator hole in the lift potentiometer bracket See Diagram 6 3C Carefully
3. motor Note Right left front and back are from the perspective of a user standing on the treadmill and facing the electronic console 27 Securely tighten the left hand drive roller adjustment bolt It is important that the bolt pulls drive roller shaft all the way forward in the roller mount 28 While applying rearward pressure to the drive roller adjust the right hand drive roller adjustment bolt until the drive roller is square relative to the treadmill frame 29 Position the drive belt on the drive motor pulley 30 Position the drive motor parallel to the line scored on the motor mounting pedestal 31 Tighten the four bolts that mount the pedestal to the drive motor mounting plate 32 Inspect and adjust the tension of the drive belt as described in Procedure 3 2 of the Commercial Treadmill Service Manual 33 34 C960 Series Commercial Treadmill Inspect and adjust the tension tracking and alignment of the running belt as described in Procedure 3 1 of the Commercial Treadmill Service Manual Check the operation of the treadmill as described in Section Three of this appendix then replace the hood C960 Series Commercial Treadmill Procedure 6 7 Replacing the Take Up Roller or Take Up Roller Bearings Removing the Take Up Roller 1 Remove the screws that secure the right and left end caps to the treadmill frame Set the end caps and end cap mounting hardware aside Place a running belt gauge on each sid
4. socket See the illustrations below for the alignment notches Care must be taken that the IC legs on a DIP28 are all aligned in the socket to prevent the legs from bending when inserted The PLCC44 IC must be carefully aligned squarely in its socket or it will not insert Do not force the IC into its socket If it does not insert easily remove the it and re align it in its socket 3 DIP28 OON Gi le CI5X V1 02 LWR amp 56 30 32 00 SC 2 PCA
5. step 36 34 Connect the two blue wires on the revolution sensor wire assembly to the terminals on the zero sense switch terminals 35 Calibrate the treadmill lift assembly as described in Procedure 4 1 of this appendix 36 Check the operation of the treadmill as described in Section Three of this appendix then replace the hood as described in Procedure 5 1 of the Commercial Treadmill Service Manual C960 Series Commercial Treadmill Procedure 6 2 Replacing the Limit Switches Actuator Shaft or Switch Bracket Note The limit switches and the actuator shaft are mounted on the switch bracket see Diagram 5 1 WARNING Always turn off the circuit breaker and unplug the treadmill before you remove the treadmill hood Procedure 1 Remove the hood 2 Ifyou are removing the actuator shaft or switch THEN OTHERWISE Skip to Step 12 to remove the upper Continue with the next step limit bracket switch Step 6 to remove the down limit switch or Step 9 to remove the zero sense switch Removing the Upper Limit Switch WARNING When power is applied to the treadmill the wires connected to the upper and lower limit switches carry high voltage Turn off the treadmill and unplug the power cord from the wall outlet before you perform the following steps 3 Carefully remove the red wires from the upper limit switch Note See Diagram 6 2 for limit switch wiring 4 Remove the screws and washers that secure the
6. that secures the switch cam to the switch mounting bracket Note One end of the dowel will go into the switch cam easier than the other end 16 17 18 19 20 Line up the tabs on the display housing with the holes on the display housing mounting plate Gently press the display housing onto the mounting plate until the tabs are pushed into the holes Connect the safety cord on the switch cam Replace the screws that secure the upper display housing to the display housing mounting plate Check the operation of the treadmill as described in Section Three of this appendix C960 Series Commercial Treadmill Procedure 6 9 Replacing the PROM Anti static kits part number 20024 101 can be ordered from Precor 1 The PROM and the associated printed circuit assembly PCA are static sensitive Anti static devices must be used and all anti static precautions must be followed during this procedure Remove the printed circuit assembly per its associated procedure Currently we are using two styles of IC software packages they are a 28 pin dual in line package DIP28 and a forty four pin square package PLCC44 Each of these packages should be removed with a proper IC removal tool see the illustrations below PLCC44 removal tool DIP28 removal tool The ICis may inserted into their socket by hand by carefully aligning the notch on the IC with the notch on the IC socket and carefully pressing the IC into its
7. the actuator block firmly with your hand when you perform Step 14 14 Unscrew the actuator shaft from the actuator block Set aside the actuator block 15 Slide the actuator shaft from the switch bracket 16 If you are removing the switch bracket THEN OTHERWISE Continue with the next step Skip to Step 20 Removing and Replacing the Switch Bracket 17 Remove the socket head screws and washers that secure the switch bracket to the lift motor platform Set aside the switch bracket 18 Position the switch bracket at its mounting location 19 Replace the socket head screws and washers that secure the switch bracket to the lift motor platform Replacing the Actuator Shaft and Switch Actuator 20 Slide the actuator shaft through the switch bracket until it is positioned at its mounting location 21 Thread the actuator block onto the lower end of the actuator shaft Note If necessary use the pliers to secure the actuator block to the actuator shaft 22 23 24 25 26 C960 Series Commercial Treadmill Position the shoulder screw removed in Step 13 through the actuator block and into the base of the lift platform Tighten the shoulder screw that connects the actuator shaft and actuator block to the lift platform Position the switch actuator on the top of the actuator shaft Replace the screw that secures the switch actuator to the actuator shaft If you must replace one or more of the limit switches
8. the roller shaft the bolt heads and washers must be outside of the clamp formed by the upper and lower roller mounts 24 25 26 27 28 29 Thread the socket head bolts through the top roller mount and into the lower roller mount Tighten the socket head bolts that secure the top and lower roller mounts Replace the screws that secure the right and left end caps to the treadmill frame Tension the running belt until both gauges are again at mid range Inspect and adjust the tension tracking and alignment of the running belt as described in Procedure 3 1 of the Commercial Treadmill Service Manual Check the operation of the treadmill as described in Section Three of this appendix C960 Series Commercial Treadmill Procedure 6 8 Replacing the Safety Switch Assembly The exploded view of the safety switch assembly is shown in Diagram 6 9 Removing the Safety Switch Cam 1 Remove the three screws that secure the upper display housing to the display housing mounting plate Place your right hand on the two right upper display housing mounting tabs Place your left hand on the left tabs Push the right tabs towards the right targa upright and the left tabs towards the left targa upright as you lift the display housing from the mounting plate Support the display housing on the front handrails If you are removing the safety switch cam as well as the safety limit switch THEN OTHERWISE Continue with the ne
9. C960 Series Commercial Treadmill Section Six Replacement Procedures Procedure 6 1 Replacing the Lift Motor Rotation Sensor or Magnet Hub 6 3 Procedure 6 2 Replacing the Limit Switches Actuator Shaft or SWIICH Bracket eiuessenueseinenreee nee 6 7 Procedure 6 3 Replacing the Lift Motor Capacitor 4 244444Bnnnnn nn nn 6 13 Procedure 6 4 Replacing the Lift Platform 22224444444444440RnR nn nun nun nnnnnnnnnn 6 15 Procedure 6 5 Replacing the Drive Belt cssssssesseeeeeeeesseeeeenneeeeeeeeeeeeees 6 19 Procedure 6 6 Replacing the Drive Roller or Drive Roller Bearings 6 23 Procedure 6 7 Replacing the Take Up Roller or Take Up Roller Bearings 6 29 Procedure 6 8 Replacing the Safety Switch Assembly seeeeeeeeeeees 6 33 Procedure 6 9 Replacing the PROM cccccssssesesssseeeeeeeeeeseeseeseeceneneeeseneeeeeeees 6 35 C960 Series Commercial Treadmill Procedure 6 1 Replacing the Lift Motor Rotation Sensor or Magnet Hub Note If you need to replace a lift motor that utilizes a hall effect rotation sensor remove the magnet hub and rotation sensor bracket from the defective lift motor and mount them on the new lift motor Unless the magnet and rotation sensor are defective do not remove them from their mounting positions on the magnet hub and sensor bracket Replacement lift motors are not furnished with the hall effect rotation senso
10. e of the running belt and set the gauges a mid range Remove the running belt tension by turning the take up roller tension adjustment bolts counterclockwise Turn the running belt tracking bolt counterclockwise 2 3 turns Remove the socket head bolts that secure the top take up roller mounts Remove the top roller mounts then lift the take up roller from the lower roller mounts If you are replacing the bearings or the bearings and shaft in the take up roller THEN OTHERWISE Continue with the next step Remove the tension limiting bolt and you perform the following steps running belt tracking bolt from the take up roller shaft Skip to Step 19 Removing the Roller Bearings and Shaft Always remove and replace the bearings and washers as a set It is not necessary to replace the shaft if you are replacing the bearings However if you are replacing the shaft you must also replace the bearings and washers 8 9 10 11 12 Remove the snap ring from one end of the roller see Diagram 6 6 Hold the roller in a vertical position 3 4 inches above a block of wood The block of wood must be on a hard solid surface such as a floor see Diagram 6 7 Hold the roller with the end of the roller that has had the snap ring removed upward and drop the roller onto the block of wood The roller may need to be dropped several times to drive the bearing out of the roller Remove the bearing from the opposite end of the r
11. e roller tube while holding the shaft in place Set the roller tube on a block of wood as shown in Diagram 6 8 Diagram 6 8 Replacing the Roller Bearing fo C960 Series Commercial Treadmill 19 While an assistant supports the roller tube place a wave washer on to the shaft Slide the new bearing onto the upper end of the shaft Using the bearing replacement tool and a hammer or mallet gently tap the bearing into the tube The bearing will be below flush and the snap ring groove will be exposed when the bearing is properly set in the roller tube 20 Using the snap ring pliers install a retaining ring next to the bearing just mounted in the roller Replacing the Drive Roller 21 Thread the drive roller adjustment bolts into the drive roller shaft 22 Visually inspect the drive belt for wear cracks or other damage Replace the drive belt if required 23 Slide the drive roller through the running belt Place the drive belt on the drive roller pulley and place the drive roller on the lower drive roller mounts 24 Place the top roller mounts on the lower roller mounts Note When you place the top roller mounts over the ends of the roller shaft the bolt heads and washers must be outside of the clamp formed by the upper and lower roller mounts 25 Thread the socket head screws through the top roller mounts and into the lower roller mounts and tighten 26 Push and hold the left side of the drive roller toward the drive
12. eadmill Procedure 6 4 Replacing the Lift Platform WARNING Always turn off the circuit breaker and unplug the treadmill before you remove the treadmill hood Removing the Lift Platform 1 Turn off the treadmill with the circuit breaker then unplug the power cord from the wall outlet 2 Place the treadmill on its right side Note To avoid scratching or marring the treadmill put a drop cloth underneath the treadmill when you perform Step 2 3 Remove the lower bolt and nut that secures the lift motor to the lift platform It is not necessary to remove the lift motor when you remove the lift platform 4 Skip this step on C962i and C964i treadmills Remove the bolt that connects the actuator block to the lift platform See Diagram 6 3B 5 Perform this step on C962i and C964i treadmills only Remove the nut that retains the lift potentiometer and remove the lift potentiometer Remove the coupler that connects the lift potentiometer to lift platform shaft Note the orientation of the flat side of the lift platform shaft When it is replaced later in this procedure it must be remounted in the same orientation If the lift shaft is incorrectly oriented the lift system calibration will be incorrect Remove the retaining ring from the lift shaft Use a thin drift punch or similar tool to carefully drive the pin out of the lift shaft on the left hand lift potentiometer side of the lift platform Remove the lift shaft See Diagram 6
13. en the bolts threaded through both ends of the drive roller shaft 7 Remove the socket head screws that secure the top drive roller mounts see Diagram 6 5 8 Remove the top roller mounts then remove the drive belt from the drive roller pulley 9 Lift the drive roller from the lower roller mounts and slide it from the running belt 10 Slip the drive belt off the drive motor pulley Replacing the Drive Belt 11 Push the drive roller through the running belt Place the drive belt on the drive roller pulley and place the drive roller on the lower drive roller mounts 12 Place the top roller mounts on the lower roller mounts Note When you place the top roller mounts over the ends of the roller shaft the bolt heads and washers must be outside of the clamp formed by the upper and lower roller mounts 13 Thread the socket head screws through the top roller mounts and into the lower roller mounts Diagram 6 5 Roller Mount Assembly C960 Series Commercial Treadmill 14 Tighten the socket head screws 15 Push and hold the left side of the drive roller toward the drive motor Note Right left front and back are from the perspective of a user standing on the treadmill and facing the electronic console CAUTION Do not crush the washer on the bolt when you perform the next step 16 Turn the bolt in the left end of the drive roller shaft all the way clockwise and tighten securely 17 Adjust the right hand bolt until
14. ift motor 23 Position the magnet hub on the lift motor so that it is flush with the speed sensor bracket 24 Replace the set screw that secures the magnet hub to the lift motor Replacing the Lift Motor 25 Extend the lift motor actuator 1 27 C960 Series Commercial Treadmill Note To extend the lift motor actuator faster place a screwdriver shaft in the lower mounting hole of the lift motor and rotate the lift motor tube 26 Position the lift motor at its mounting location Note When you perform Step 27 replace the lower screw and nut first 27 Replace the two shoulder screws and nuts that secure the lift motor to the treadmill frame Note The original nuts used to mount the lift motor are Kep nuts which do not require a separate washer If you do not use Kep nuts to mount the lift motor use washers when you mount the lift motor to the treadmill frame 28 Return the treadmill to an upright position 29 Connect the black lift motor lead to the terminal of the lift motor capacitor that already has a black wire 30 Connect the red lift motor lead to the terminal of the lift motor capacitor that already has a red wire 31 Connect the connector on the white lift motor lead that connects the lift motor to pin 4 of lower PCA connector J3 32 Connect the molex connector on the revolution sensor wire assembly to connector J2 on the lower PCA 33 If the treadmill does not have a rotation sensor C962i or C964i go to
15. ing Bracket Rotation Sensor Magnet Hub _ F a Magnet C960 Series Commercial Treadmill Replacing the Magnet 12 Remove the set screw that secures the magnet to the magnet hub Discard the magnet Note When you position the magnet in the magnet hub place the north pole towards the center of the magnet hub The north pole of the magnet should be marked with a spot of white paint If the magnet on the treadmill you are servicing is not marked use either a compass or another magnet to determine the north pole 13 Position a new magnet in the magnet hub 14 Tighten the set screw that secures the magnet to the magnet hub 15 If you are replacing the revolution sensor THEN OTHERWISE Continue with the next step Skip to Step 19 16 Remove the screw and washer that secure the rotation sensor to the sensor bracket see Diagram 6 1 17 Position the revolution sensor at its mounting location 18 Position the screw and washer that secure the rotation sensor to the sensor bracket Torque the screw to 8 in Ibs 19 If you are replacing the lift motor you removed earlier in this procedure THEN OTHERWISE Continue with the next step Skip to Step 25 Removing and Replacing the Rotation Sensor Bracket 20 Remove the two nuts that secure the sensor bracket to the lift motor 21 Position the sensor bracket removed in the previous step on the lift motor 22 Replace the two nuts that secure the sensor bracket to the l
16. limit switch to the switch bracket 5 Ifyou are removing more than one limit switch THEN OTHERWISE Continue with the next step to Skip to Step 11 remove the down limit switch or Step 9 to remove the zero sense switch C960 Series Commercial Treadmill Removing the Down Limit Switch 6 Carefully remove the black wires from the down limit switch 7 Remove the screws and washers that secure the limit switch to the switch bracket see Diagram 5 1 8 If you are removing the zero sense switch THEN OTHERWISE Continue with the next step Skip to Step 11 Removing the Zero Sense Switch 9 Carefully remove the blue wires from the zero sense switch 10 Remove the two screws and washers that secure the limit switch to the switch bracket see Diagram 5 1 Diagram 6 2 Limit Switch Wiring Diagram To Lift Cap To J3 Black Term 3 To J2 Term 3 To J2 Term 6 To J3 Red Term 1 To Lift Cap C960 Series Commercial Treadmill 11 If you are removing the actuator shaft or switch bracket THEN OTHERWISE Continue with the next step Skip to Step 26 Removing the Actuator Shaft and Switch Actuator 12 Remove the screw that secures the switch actuator to the actuator shaft Set aside the screw and switch actuator 13 Remove the shoulder screw that connects the actuator shaft and actuator block to the lift platform Note If necessary hold the actuator shaft with the pliers and support
17. ller from the lower roller mounts and slide it out of the running belt 7 Slip the drive belt off the drive motor pulley then set aside the drive belt until you are ready to install the drive roller 8 Ifyou are replacing the bearings or the bearings and shaft in drive roller THEN OTHERWISE Continue with the next step Remove the bolts threaded through the drive roller shaft then skip to Step 21 Removing the Roller Bearings and Shaft Always remove and replace the bearings and washers as a set It is not necessary to replace the shaft if you are replacing the bearings However if you are replacing the shaft you must also replace the bearings and washers C960 Series Commercial Treadmill Diagram 6 6 Exploded View of a Roller Wave Washer Roller Shaft Roller Tube Bearing Snap Ring 9 Remove the snap ring from both ends of the roller see Diagram 6 6 10 Hold the roller in a vertical position 3A4 inches above a block of wood The block of wood must be on a hard solid surface such as a floor see Diagram 6 7 11 Hold the roller with the end of the roller upward and drop the roller onto the block of wood The roller may need to be dropped several times to drive the bearing out of the roller 12 Remove the bearing from the opposite end of the roller in the same manner Care must be taken to keep the roller shaft in the bearing because the shaft is no longer being retained on the lower end
18. ller shaft Slide the roller tube down over the shaft until the end of the shaft protrudes through the bearing Invert the roller tube while holding the shaft in place Set the roller tube on a block of wood as shown in Diagram 6 8 While an assistant supports the roller tube place a wave washer on to the shaft Slide the new bearing onto the upper end of the shaft Using the bearing replacement tool and a hammer or mallet gently tap the bearing into the tube The bearing will be below flush and the snap ring groove will be exposed when the bearing is properly set in the roller tube Using the snap ring pliers install a retaining ring next to the bearing just mounted in the roller Replacing the Take Up Roller 20 21 22 Slide the take up roller through the running belt then place the take up roller on the lower roller mounts If the treadmill uses a tension limiting bolt assembly thread it into the right end of the take up roller shaft Thread the running belt tracking bolt through the left end of the take up roller shaft C960 Series Commercial Treadmill Note When you replace the bolts in the take up roller the tension limiting bolt must be on the right side of the treadmill when the take up roller is installed on the treadmill The belt tracking bolt must be on the left side of the treadmill 23 Place the top roller mounts on the lower roller mounts Note When you place the top roller mounts over the ends of
19. of the roller as it is dropped onto the block of wood 13 Remove the shaft from the roller Diagram 6 7 Removing a Bearing C960 Series Commercial Treadmill Replacing the Roller Bearings and Shaft You will need an assistant to perform the following steps 14 15 Have an assistant support the roller against a work surface One end of the roller must be flush with the work surface Place a bearing on the roller then position the bearing replacement tube against the outer race of the bearing Note A ten inch length of 2 inch O D pipe with a cap threaded onto one end will serve as a bearing replacement tool The open end will be placed against the bearing and the end with the capped end will be struck with the hammer CAUTION The bearing must go squarely into the roller tube If the bearing is not square in the roller tube you will be unable to insert the bearing 16 17 18 Set the roller tube on a solid work surface Place a new bearing in the bearing pocket on one end of the roller tube Using the bearing replacement tool and a hammer or mallet gently tap the bearing into the tube The bearing will be below flush and the snap ring groove will be exposed when the bearing is properly set into the roller tube Using the snap ring pliers install the snap ring Place a wave washer onto roller shaft Slide the roller tube down over the shaft until the end of the shaft protrudes through the bearing Invert th
20. oller in right same manner Care must be taken to keep the roller shaft in the bearing because the shaft is no longer being retained on the lower end of the roller as it is dropped onto the block of wood Remove the shaft from the roller C960 Series Commercial Treadmill Replacing the Roller Bearings and Shaft You will need an assistant to perform the following steps 13 14 Have an assistant support the roller against a work surface One end of the roller must be flush with the work surface Place a bearing on the roller then position the bearing replacement tube against the outer race of the bearing Note A ten inch length of 2 inch O D pipe with a cap threaded onto one end will serve as a bearing replacement tool The open end will be placed against the bearing and the end with the capped end will struck with the hammer CAUTION The bearing must go squarely into the roller tube If the bearing is not square in the roller tube you will be unable to insert the bearing 15 16 17 18 19 Setthe roller tube on a solid work surface Place a new bearing in the bearing pocket on one end of the roller tube Using the bearing replacement tool and a hammer or mallet gently tap the bearing into the tube The bearing will be below flush and the snap ring groove will be exposed when the bearing is properly set into the roller tube Using the snap ring pliers install the snap ring Place a wave washer onto ro
21. r WARNING Always turn off the circuit breaker and unplug the treadmill before you remove the treadmill hood Removing the Lift Motor 1 Remove the hood 2 Remove the red lift motor lead from the lift motor capacitor but leave the remaining red wire connected to the capacitor terminal 3 Remove the black lift motor lead from the lift motor capacitor but leave the remaining black wire connected to the capacitor terminal 4 Disconnect the connector on the white lift motor lead 5 Ifthe treadmill does not have a rotation sensor C962i or C964i go to step 8 6 Remove the revolution sensor plug from the J2 connector jack on the lower PCA Note When the revolution sensor wire assembly is disconnected from the lower PCA the zero sense switch must be disconnected as well 7 Disconnect the two blue wires on the rotation sensor wire assembly from the zero sense switch terminals 8 Place the treadmill on its left side 9 Remove the two shoulder screws and nuts that secure the lift motor to the treadmill frame and lift platform see Diagram 6 1 Remove the lift motor and set it aside 10 If the treadmill does not have a rotation sensor C962i or C964i go to step 25 11 Remove the set screw that secures the magnet hub to the lift motor Set aside the magnet hub C960 Series Commercial Treadmill Diagram 6 1 Exploded view of the Lift Motor with Rotation Sensor Lift Motor 1 4 Rotation Sensor pe lt Mount
22. re 4 1 of this appendix Check the operation of the treadmill as described in Section Three of this appendix C960 Series Commercial Treadmill Procedure 6 3 Replacing the Lift Motor Capacitor WARNING Always turn off the circuit breaker and unplug the treadmill before you remove the treadmill hood Removing the Lift Motor Capacitor 1 Remove the hood 2 Remove the black and red wires from the lift motor capacitor terminals 3 Loosen the screw and nut on the capacitor mounting bracket Note If you are servicing a 240 volt 960 series treadmill use a phillips screwdriver to loosen and tighten the screw on the capacitor mounting bracket 4 Remove the capacitor from the mounting bracket Replacing the Lift Motor Capacitor 5 Position the lift motor capacitor in the capacitor mounting bracket Note Wire length and wire assembly configuration may limit the mounting orientations of the lift motor capacitor Make sure that the wires you removed from the capacitor will reach the capacitor terminals before you perform the next step 6 Tighten the screw and nut on the capacitor mounting bracket 7 Connect the wires removed in Step 2 to the capacitor terminals Note Because the lift motor capacitor is not polarized you can connect wires to either terminal However you cannot mix wire colors on any one terminal 8 Check the operation of the treadmill as described in Section Three of this appendix C960 Series Commercial Tr
23. the drive roller is square to the frame 18 Position the new drive belt on the drive motor pulley 19 Position the drive motor pedestal parallel to the line scored on the drive motor mounting plate 20 Tighten the bolts that mount the pedestal to the drive motor mounting plate 21 Replace the inductor 22 Inspect and adjust the tension of the drive belt as described in the Commercial Treadmill Service Manual Note The drive belt will track along either the right or left edge of the pulley grooves It will not center itself between the pulley flanges 23 Check the operation of the treadmill then replace the hood C960 Series Commercial Treadmill Procedure 6 6 Replacing the Drive Roller or Drive Roller Bearings WARNING Always turn off the circuit breaker and unplug the treadmill before you remove the treadmill hood Note If the drive roller bearings require replacement you may replace either the bearings or the entire drive roller Replacing the bearings uses parts that are less expensive but requires more time to perform the replacement Removing the Drive Roller 1 Remove the hood 2 Remove the running belt tension by turning the drive roller adjustment bolts counterclockwise 3 Remove the drive motor as described in Procedure 6 5 4 Remove the socket head screws that secure the top drive roller mounts 5 Remove the top roller mounts then remove the drive belt from the drive pulley 6 Lift the drive ro
24. tighten the lift potentiometer nut Do not overtighten the lift potentiometer nut If the coupler has set screws align the coupler over the junction of the lift potentiometer shaft and the lift shaft and tighten the coupler set screws C960 Series Commercial Treadmill Diagram 6 3C Lift Potentiometer Mounting Locator Tab Potentiometer Locator Hole Potentiometer Bracket 10 Skip this step on C962i and C964i treadmills Replace the bolt that connects the actuator block to the lift platform 11 Replace the lower bolt and nut that secures the lift motor to the lift platform 12 Check the operation of the treadmill as described in Section Three of this appendix C960 Series Commercial Treadmill Procedure 6 5 Replacing the Drive Belt WARNING Always turn off the circuit breaker and unplug the treadmill before you remove the treadmill hood Removing the Drive Belt 1 Remove the hood 2 Score a line on the drive motor mounting plate that runs the length of the motor pedestal see Diagram 6 4 Note The line scored on the mounting plate allows you to correctly position the drive motor 3 Ifthe treadmill is an SCR treadmill remove the inductor 4 Loosen the four lock nuts that secure the drive motor pedestal to the drive motor mounting plate Diagram 6 4 Scoring the Drive Motor Pedestal C960 Series Commercial Treadmill 5 Carefully push the drive motor toward the drive roller 6 Loos
25. xt step Skip to Step 6 Diagram 6 9 Safety Switch Assembly Switch a f Bracket C960 Series Commercial Treadmill 4 Disconnect the safety cord from the switch cam see Diagram 6 10 5 Remove the dowel that secures the switch cam to the switch mounting bracket see Diagram 6 10 Set aside the safety switch cam Removing the Safety Limit Switch 6 Disconnect the safety switch wiring 7 Remove the screws and nuts that secure the safety switch to the switch mounting bracket 8 Remove the small rubber ring positioned between the safety switch actuator and the switch cam Replacing the Safety Switch 9 Position the small rubber ring removed in the previous step between the safety switch actuator and the switch cam 10 Position the safety limit switch at its mounting location Diagram 6 10 Safety Switch Cam and Safety Cord Bracket Switch Cam Dowel i ring Safety Switch 11 12 C960 Series Commercial Treadmill Replace the screws and nuts that secure the safety limit switch to the switch mounting bracket Connect the safety switch wire assembly to the upper PCA Replacing the Safety Switch Cam 13 If the safety switch cam operates too freely the switch may operate unintentionally If desired a friction pad Precor part 38628 101 may be inserted between the safety switch cam and switch mounting bracket 14 Position the safety switch cam at its mounting location 15 Replace the dowel
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