3M 3M-Matic S-857, Instructions And Parts List

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20
Troubleshooting
(Continued)
Troubleshooting Guide (arranged in sequence of machine operation)
Problem
Buffing arm/cut-off blade out of
sequence, oscillate back and forth.
Feed assembly retracts and stops.
Feed cylinder extends but does not
actuate V-8 valve.
Tape not cutting or tape end
shredding or buffing rollers stop in
mid-stroke and do not apply the
tape.
Tape not being held by jaw
assembly.
Correction
1. Turn off air supply adjust valve
V-3. Retract cut and buffing
cylinder to retracted positions.
Actuate and hold V-3 as air is
turned on. This should put air
circuitry in sequence.
2. Adjust or replace valve V-2.
1. Adjust or replace valve V-6.
2. Adjust or replace valve V-5.
3. Replace valve.
4. Adjust or replace valve V-7.
1. Adjust or replace valve V-7.
2. Adjust or replace valve V-5.
3. Retighten and adjust V-8 valve
if needed.
1. Replace blade.
2. Readjust blade and tighten screw.
1. Replace roller.
2. Adjust V-6 valve.
3. Adjust or replace V-7 valve.
4. Replace wave washer.
5. Adjust jaw cylinder flow control.
6. Adjust flow control for extending
feed cylinder.
7. Replace jaw spring.
8. Replace one-way roller assem-
bly located on feed assembly.
Possible Cause
1. Valve V-3 out of adjustment or
defective.
2. Valve V-2 out of adjustment or
defective, sticks closed when
box paddle is actuated.
1. Valve V-6 out of adjustment or
defective.
2. Valve V-5 out of adjustment or
defective.
3. Power valve P-2 defective.
4. Valve V-7 out of adjustment or
defective.
1. Valve V-7 out of adjustment or
defective.
2. Valve V-5 out of adjustment or
defective.
3. Check for loose cylinder rod
connection.
1. Dull blade.
2. Blade out of adjustment.
1. Bad jaw roller.
2. Valve V-6 actuates before tape
is in jaw assembly.
3. Valve V-7 actuated before tape
is clamped.
4. Wave washer (Item #81)
missing from tape holding roller
(Item #27).
5. Jaws close too slow.
6. Feed cylinder extends too fast.
7. Low clamping force on tape.
Missing or broken jaw spring
(Item #114).
8. Bad one-way roller assembly.
End of tape is not fed into the
jaw assembly.
WARNING – Use care when working near knife blade
as blade is extremely sharp. If care is not taken,
severe injury to personnel could result.