RIDGID 918-I Manual page 17

Table III. Troubleshooting
PROBLEM
Rolled groove too
narrow or too wide.
Rolled groove not per-
pendicular to pipe axis.
Pipe does not track
while grooving.
Pipe flared at groove end.
Pipe drifts back and forth
on driving roll axis while
grooving.
Pipe rocks from side to
side.
Groover does not roll
groove in pipe.
Groove does not meet
specification.
Pipe slips on driving
roll.
999-998-676.10_REV. C
CAUSE
Incorrect size of grooving and driving rolls.
Mismatched grooving and driving rolls.
Grooving roll and/or driving roll worn.
Pipe length not straight.
Pipe end not square with pipe axis.
Pipe not level.
Groover not level.
Pipe axis not offset 1 / degree from drive roll axis.
2
1 / degree offset not sufficient.
2
Not applying pressure to pipe.
Not using stabilizer.
Excessive weld seam.
Pipe end not square.
Pipe not level.
Operator is advancing groove roll too fast.
Pipe is too hard.
Stabilizer too tight.
Pipe length not straight.
Pipe end not square with pipe axis.
Pipe stand too close to end of pipe.
Pipe end flattened or damaged.
Hard spots in pipe material or weld seams harder
than pipe.
Grooving roll feed rate too slow.
Pipe support stand rollers not in correct location for
pipe size.
Pipe wall maximum thickness exceeded.
Wrong rolls.
Pipe material too hard.
Adjustment nut not set.
Maximum pipe diameter tolerance exceeded.
Mismatched grooving and driving rolls.
Grooving 8" Sch.40 steel pipe harder than 150
BHN.
Driving roll knurling plugged with metal or worn flat.
Grooving roll feed rate too slow.
918-I Heavy Duty Roll Grooving Machine
Install correct size of grooving and driving rolls.
Match grooving and driving rolls.
Replace worn roll.
Use straight pipe.
Cut pipe end square.
Adjust stand to level pipe.
Level groover.
Offset pipe 1 / degree (See Figure 7).
2
Offset pipe slightly more.
Apply pressure to pipe (See Figure 9).
Use stabilizer.
Grind flush 2" from end of pipe.
Cut pipe end square.
Adjust stand to level pipe.
Slow down pumping action. Refer to proper oper-
ating instructions.
Replace pipe.
Adjust stabilizer.
Use straight pipe.
Cut pipe end square.
Move pipe stand in
Cut off damaged pipe end.
Use high quality pipe of uniform hardness.
Feed grooving roll into pipe faster.
Position pipe stand rollers for pipe size being used.
Check pipe capacity chart.
Install correct rolls.
Replace pipe.
Set depth.
Use correct diameter pipe.
Use correct set of rolls.
Do not groove hard pipe.
Clean or replace driving roll.
Feed grooving roll into pipe faster.
CORRECTION
1 / distance from end of pipe.
4
15