3M 3125 Sander User Manual


 
e. Guideline for parts exchange
Parts no.
Figure no.
(ID number)
Part name Qty Guideline for parts exchange
3 3305 Spring 1 When bent or damaged, or when it doesn’t
work properly
4 3322 Air regulator 1
5 3323 O ring (p-7) 2 When damaged
6 3501 O ring (P-10A) 1 When damaged
8 3401 Throttle lever 1 When deep wear marks occur in the part
that contacts the valve pin
9 3402 Roll pin 1 Lever hinge is worn badly
10 3465 Ball bearing
(696ZZ)
1 Ball is worn and gap becomes big, or is
locked up
11 3326 Rear end plate 1 When bearing is loose or when other
dangerous deformation is seen. If the
marks made by the rotor are not bad, it can
be repaired with paper wrap.
12 3411 Roll pin 2
13 3333 Rotor collar 1
14 3210 Cylinder 1 When internal scratches cannot be
repaired.
15 3329 Rotor 1 When the vane groove is worn
16 3212 Rotor blade 4
When the width is 0.5 less than the
original size (7), or when the length
becomes 0.25 less than the original size
(25.4)
17 3424 Front end plate 1 When the bearing joint is loose or when
other dangerous damage is seen. If the
marks made by the rotor are not bad, it can
be repaired with paper wrap.
18 3464 Ball bearing
(608Z)
1 1) When the ball bearing is worn or seized
up. 2) There is too much play.
19 3217 Pinion 1 When the gear is damaged or heavily worn
20 3215 Cup lock 1
21 3119 Cup 1
22 3118 Angle housing 1
23 3466 Ball bearing
(696ZZ)
1 1) When the ball bearing is worn or seized
up. 2) There is too much play.
24 3336 Gear 1
25 3464 Ball bearing
(608Z)
1 1) When the ball bearing is worn or seized
up. 2) There is too much play.
26 3338 Half moon key
(1.5 x 8)
1
28 3340 Clamp nut 1
30 3321 O ring (P-4) 1 When damaged or it won’t seal
32 60730 EX shaft 1 When the bearing juncture is loose
33 60731 Balancer 1
34 170408 Stopper screw with
hexagonal hole (M4 x
8, tip of bar)
1
35 60737 Snap ring 1 When bent or severely deformed
36 686ZZ Bearing (686ZZ) 2 When the balls are worn and there is too
much play or the bearing is or locked up
37 60732 Shoe bearing case 1 When the bearing is loose or deformed.
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