Signode TENSION-WELD VT-16HD Operation, Parts And Safety Manual page 21

#6 CONDITION: A poor weld identified by an incomplete area of weld.
CAUSE
Welding is achieved by a combination of vibration and
downward pressure of the upper gripper. Either a
restriction of motion or a reduction of downward
pressure will cause a poor weld.
#7 CONDITION: Incomplete or no weld.
CAUSE
1. Improperly set weld time adjustment.
2. Worn teeth on upper or lower weld pads.
3. Insufficient air supply pressure.
4. Worn o-ring on main piston.
#8 CONDITION: Strap is over welded.
CAUSE
Improper weld timing adjustment.
#9 CONDITION: Motor shutoff appears sluggish.
CAUSE
1. Air leakage in timing circuit.
2. Dirty or very dry pilot valve (Key 106).
3. Dirty or very dry sealer valve stem (key 72).
REMEDY
Dismantle and clean the weld mechanism by brushing
away the strap residue or washing the entire unit in a
solvent. When a solvent is used it is imperative the
assembly be blown dry to remove all solvent. Check
for dry or worn bearings. Replace or lubricate as
required. If the tool has been used extensively,
examine the teeth on the upper and lower weld pads
for wear. Replace if worn.
REMEDY
1. Adjust weld time as required per instruction in
this manual.
2. Replace as required.
3. Remedy as required.
4. Replace as required.
REMEDY
Decrease weld timing as needed.
REMEDY
1. Check o-rings and pneumatic components for
leaks. Replace parts as required.
2. Remove, clean and lubricate the pilot valve
using air line oil or replace if needed.
3. Remove valve stem and inspect o-rings for
damage. Replace o-rings as needed. Clean part
and lubricate with EP Accrolube grease.
29