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W1737/W1738 Owner's Manual (Mfg. 10/09+)
SERVICE
Figure 36. Brake assembly.
Figure 37. Brake caliper removed for
access to brake pads.
Brake Service
Check the brake rotor (shown in Figure 36) regularly
to make sure it is clean and the pads are still in good
condition (thicker than 1⁄8", see Figure 37). Using the
emergency stop system for daily machine shutdown will
wear out the sanding belts and the brake pads. Inspect
for any grease or oil on the brake rotor as oil reduces
emergency braking ability. To clean any lubricants from
the rotor, only use automotive brake parts cleaner and
a dry rag. Replace brake shoes if they are contaminated
withoil.DONOTre-use!
To check the condition of the brake pads, do these
steps:
1. TURN OFF and LOCK the master power switch so
no power can go to your sander, and shut OFF and
relieve the air pressure!
2. Removethelower-rightmotor-accesspanel.
3. Measure the thickness of each pad. If a pad is below
1⁄8", then replace both.
To replace the brake pads, do these steps:
1. TURN OFF and LOCK the master power switch so
no power can go to your sander, and shut OFF and
relieve the air pressure!
2. Use a 14mm wrench and remove the two caliper
anchor pin retaining nuts and washer (see Figure
36).
3. Use locking pliers to clamp on the anchor pin
end and pull the pin from the caliper mount, and
remove the springs and caliper (see Figure 37).
4. If the rotor is damaged, remove the rotor and have
it surfaced at a machine shop. Clean the rotor with
automotive brake parts cleaner and handle it with a
dry rag when installing.
5. Tofinishthejob,installthenewbrakepads,
reassemble and mount the caliper, and reconnect
the air line if removed.
6. Test the emergency brake operation!
Retaining
Nut
Rotor
Caliper
Assembly
Anchor
Pins
Brake
Pads
1
⁄8"
Min