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W1737/W1738 Owner's Manual (Mfg. 10/09+)
SERVICE
Changing V-Belts
ChecktheV-beltsperiodicallytocheckforsignsof
glazing,crackingorfraying.Ifanyofthese conditions
arepresent,changebothV-belts.
Note: If the emergency stop system is used to stop
the machine as a normal daily event, the breaking
system and belts will prematurely wear and require
replacement. When shutting down the machine under
non-emergency conditions, use the red OFF push
buttons.
To change the V-belts, do these steps:
1. TURN OFF and LOCK the master power switch so no
power can go to your sander and shut OFF the air
pressure!
2. Openbothright-sideupperandloweraccesspanels.
3. Remove the screws and the safety cover for access
to the upper pulley. See Figures 38 and 39.
4. Use a 14mm wrench and remove the upper caliper
anchor pin retaining nut and washer. See Figure 40.
5. Use locking pliers to clamp on the anchor pin end,
pull the pin from the caliper mount, and remove the
springs. See Figure 40.
6. Pivotthecaliperdownandawayfromtherotor for
belt clearance.
7. Removetheupperbeltadjustmentnutandwasher
(Figure 40).
8. Prythemotorbaseplateupwardtode-tensionthe
belts, and roll the belts off of the motor pulley.
9. InstallthenewV-belts.
10.Replacetheupperbeltadjustment nutandwasher,
and tension the belt as necessary.
11.TheV-beltisproperlytensionedwhen itwillmove
no more than 3⁄4" in the center with moderate
pressurefromyourthumb.SeeV-Belt Tension on
Page 29 for details.
12. Reassemble in reverse order and test the emergency
brake operation.
Figure 38. Safety cover and mounting
screws.
Figure 39. Upper pulley exposed.
Figure 40. Belt removal access.
Safety
Cover
Retaining
Nut
Rotor
Caliper
Assembly
BeltAdjustmentNut Anchor
Pins