Procenter Delivery System* Troubleshooting Charts * includes International (Whip) Units

Procenter Delivery System* Troubleshooting Charts  * includes International (Whip) Units
Procenter Delivery System*
Troubleshooting Charts
* includes International (Whip) Units
Component
Page
Procenter / Int’l. (Whip) Delivery Units*............................... 2
Assistant’s Units.................................................................. 6
Midmark Cuspidor............................................................... 7
Flex Arms............................................................................ 9
* International (Whip) Delivery Units may be used with Asepsis Delivery System
components. For information on Asepsis consoles, assistant’s units, etc, refer to:
Asepsis Delivery System
3
4
1
2
1
004-0868-00 [Revised: mo/dd/yr]
Troubleshooting Chart: Procenter / International (Whip) Delivery Units
Problem
None of the handpieces
or syringe(s) will
function
Handpieces will not run.
One handpiece does not
run; all other handpieces
work properly.
Symptom
There is no water or air present at
any of the handpieces / syringe(s).
Check
Solution
Master ON / OFF switch must be ON.
Replace Master ON / OFF switch if
necessary.
Manual shutoff valve (in J-box) for AIR is
turned OFF.
Manual shutoff valves must be ON.
Contact licensed plumber to replace manual
shutoff valve.
Air pilot shutoff valve is malfunctioning.
Disconnect 1/8” purple tubing from air pilot shutoff
valve and check for air pressure.
If there no air pressure:
Replace air pilot shutoff valve
Handpieces do not run or have water.
Syringe works properly.
Throttle valve (in foot control) is
malfunctioning - stuck closed.
Disconnnect 1/4” clear tubing from 1/4” grey foot
control tubing. Check for air pressure.
If there no air pressure:
Replace throttle valve
Handpieces do not run or have water.
Syringe has water, but no air.
Tubing from air regulator damaged or
disconnected.
Check 1/4” grey tubing w/ rib (from foot control)
and 1/8” yellow tubing (from umbilical to delivery
unit) for damage and proper connnections.
Replace damaged tubing. Reconnect any
disconnected tubing.
Air regulator is set too low or
malfunctioning.
Air regulator output pressure should be 80 PSI.
Adjust air regulator pressure to 80 PSI.
Clean or replace air regulator if necessary.
Handpieces have water, but do not
run. Syringe works properly.
Damaged or disconnected drive air tubing
to delivery unit.
Check 1/4” grey tubing w/o rib (from foot control)
and 1/4” clear tubing (to handpiece supply
drive air manifold) for damage and proper
connnections.
Replace damaged tubing. Reconnect any
disconnected tubing.
One handpiece does not run or have
water; all other handpieces work
properly.
Handpiece holder valve is malfunctioning
(stuck open) - keeping the kink valve
“kinked”.
Replace suspect valve with known working valve..
Replace handpiece holder valve.
Kink valve is malfunctioning.
Watch kink valve when handpiece is removed
from holder. (It should “unkink”.)
If kink valve remians “kinked”:
Replace kink valve.
Damaged or disconnected tubing in
delivery unit.
Check 1/8” red tubing (between pilot air manifold
and handpiece ON/OFF valve) and 1/8” purple
tubing (between handpiece ON/OFF valve and
kink valve) for damage and proper connnections.
Replace damaged tubing. Reconnect any
disconnected tubing.
Drive air adjustment valve set too low or
malfunctioning.
Check drive air adjustment valve for
malfunctioning handpiece.
Adjust drive air valve.
Replace valve if necessary.
Damaged or disconnected tubing in
delivery unit.
Check 1/4” clear tubing (between drive air
manifold and drive air adjustment valve) and
1/4” clear tubing (between drive air adjustment
valve and kink valve) for damage and proper
connnections.
Replace damaged tubing. Reconnect any
disconnected tubing.
Damaged or disconnected tubing.
Check 1/8” blue tubing (between water selector
valve and water supply manifold in delivery head)
for damage and proper connections.
Replace damaged tubing. Reconnect any
disconnected tubing.
Water selector valve malfunctioning
Disconnect “out-going” water line from water
selector valve and check for water pressure.
If there is no water pressure:
Clean or replace water selector valve.
Water supply manifold (in delivery unit)
malfunctioning.
Disconnect instrument water supply tubing (1/8”
blue) from water supply manifold. Check for water
pressure.
If there is water pressure:
Clean or replace water selector valve.
One handpiece does not run, but
has water and coolant air; all other
handpieces work properly.
No water to handpieces
or syringe. Handpieces
run properly.
Probable Cause
Master ON/OFF switch is turned OFF or
malfunctioning.
With water selector valve (City
/ Botttle toggle switch) in either
position, there is no water to
handpieces or syringe.
2
004-0868-00 [Revised: mo/dd/yr]
Troubleshooting Chart: Procenter / International (Whip) Delivery Units - continued
Problem
No water to handpieces
or syringe. Handpieces
run properly. - continued
Symptom
With water selector valve (City
/ Botttle toggle switch) in CITY
position, there is no water to
handpieces or syringe. BOTTLE
position functions properly.
With water selector valve (City /
Botttle toggle switch) in BOTTLE
position, there is no water to
handpieces or syringe. CITY position
functions properly.
No water to
handpiece(s).
Syringe works properly.
All handpieces run and syringe works
properly, but there is no water to any
of the handpieces.
Handpiece runs, but there is n water
to that handpiece. Other handpieces
work properly.
Probable Cause
Check
Solution
Water selector valve malfunctioning.
Disconnect incoming City water line from water
selector valve and check for water pressure.
If there is water pressure:
Clean or replace water selector valve.
Manual shutoff valve (in J-box) for
WATER is turned OFF.
Manual shutoff valves must be ON.
Contact licensed plumber to replace manual
shutoff valve.
Water regulator valve (in J-box) is set too
low or malfunctioning.
Water regulator output pressure should be set to
30 PSI.
Adjust water regulator to 40 PSI.
Clean or replace water regulator if necessary
Water pilot shutoff valve (in J-box) is
malfunctioning.
Disconnect 1/8” blue tubing (from water pilot
shutoff valve) and check for water pressure.
If there is no water pressure:
Replace water pilot shutoff valve.
Damaged or disconnected tubing.
Check 1/8” blue tubing between water regulator
(in J-box) and water selector valve for damage
and proer connection.
Replace damaged tubing. Reconnect any
disconnected tubing.
Water bottle is empty.
-
Fill water bottle.
Water bottle gasket damaged or missing.
Check for air leaking from top of water bottle.
Replace water bottle gasket.
Water bottle air regulator (in J-box) set too
low or malfunctioning.
Water bottle air regulator output pressure should
be set to 30 PSI.
Adjust water bottle air regulator to 30 PSI.
Clean or replace regulator if necessary
Water bottle air regulator (in console or
L/R arm) is malfunctioning.
Water bottle air regulator output pressure should
be 30 PSI.
Replace regulator if necessary.
Damaged or disconnected tubing.
Check 1/8” brown tubing (between water bottle
air regulator in J-box and water bottle cap for
damage and proper connection.
Replace damaged tubing. Reconnect any
disconnected tubing.
Check 1/8” blue tubing (between water bottle cap
and water selector valve) for damage and proper
connection.
Replace damaged tubing. Reconnect any
disconnected tubing.
Water selector valve malfunctioning.
Disconnect 1/8” blue tubing (from water bottle)
from the water selector valve and check for water
pressure.
If there is water pressure:
Clean or replace water selector valve.
Toggle switch on foot control is turned
OFF.
Check that toggle switch is turned ON.
Turn toggle switch ON.
Toggle switch on foot control is
malfunctioning.
Check water pressure at output of coolant water
toggle valve.
Replace foot control. (valves are not
replaceable)
Damaged or disconnected tubing.
Check 1/8” orange tubing (from umbilical) for
damage and proper connection.
Replace damaged tubing. Reconnect any
disconnected tubing.
(Procenter units) Coolant water
adjustment valve is set too low or is
malfunctioning.
Check coolant water adjustment valve for
handpieces.
Adjust coolant water valve.
Replace valve if necessary.
(Whip units) Coolant water control valve
malfunctioning.
Disconnect 1/8” blue outlet line and check for
water during operation.
Replace coolant water control valve.
Refer to tubing diagrams.
Damaged or disconnected tubing.
Check 1/8” blue tubing (between water supply
manifold and coolant water adjustment valve) and
(between coolant water adjustment valve and
kink valve of handpiece) for damage and proper
connection.
Replace damaged tubing. Reconnect any
disconnected tubing.
Check 1/8” white tubing (between coolant water
adjustment valve) and (between kink valve and
check valve)
Replace damaged tubing. Reconnect any
disconnected tubing.
Kink valve malfunctioning
-
3
Replace kink valve if necessary.
004-0868-00 [Revised: 1/8/13]
Troubleshooting Chart: Procenter / International (Whip) Delivery Units - continued
Problem
Symptom
Probable Cause
Check
Solution
Water leaks from
handpiece when
removed from holder.
When any handpiece is removed
from holder, water comes out without
pressing foot control pedal.
All handpieces run, but
do not function properly.
Water sputters when handpiece is
used.
Air in lines.
Check for air in coolant lines.
Press coolant water flush valve button and
hold for 45 seconds.
Water leaking into oil jar.
Handpiece is not sealing at hose
connection point, causing water to leak
into exhaust hole.
Check for damaged / missing gasket in
handpiece.
Replace gasket(s).
With water selector valve (City
/ Bottle toggle switch) in either
position, water pressure is too low at
all handpieces & syringe(s).
Twisted / damaged tubing.
Check 1/8” blue tubing (between water selector
valve and water supply manifold in delivery unit)
for damage, kinks, etc.
Replace damaged tubing. Reroute tubing if
necessary.
Water supply manifold (in delivery unit) is
partially clogged.
Disconnect all tubing from manifold and inspect
for proper air flow.
Clean / replace water supply manifold.
With water selector valve (City /
Bottle toggle switch) in CITY position,
water pressure is too low at all
handpieces & syringe(s). In BOTTLE
position, water pressure is normal.
Water regulator setting is too low.
Water regulator output pressure should be set to
30 PSI.
Adjust water regulator to 30 PSI.
Clean or replace regulator if necessary
Twisted / damaged tubing.
Check 1/8” blue tubing (between selector valve
and water regulator in J-box) for damage, kinks,
etc.
Replace damaged tubing. Reroute tubing if
necessary.
With water selector valve (City /
Bottle toggle switch) in BOTTLE
position, water pressure is too low at
all handpieces & syringe(s). In CITY
position, water pressure is normal.
Water bottle air regulator setting is too
low.
Water bottle air regulator output pressure should
be set to 30 PSI.
Adjust water bottle air regulator to 30 PSI.
Clean or replace regulator if necessary
Water bottle air regulator (in console or
L/R arm) is malfunctioning.
Water bottle air regulator output pressure should
be 30 PSI.
Replace regulator if necessary.
Twisted / damaged tubing.
Check 1/8” brown tubing (between water bottle
air regulator in J-box and water selector valve) for
damage, kinks, etc.
Replace damaged tubing. Reroute tubing if
necessary.
Check 1/8” blue tubing (between water bottle cap
and water selector valve) for damage, kiks, etc.
Replace damaged tubing. Reroute tubing if
necessary.
Water bottle gasket leaking.
Check for air leaking from top of water bottle.
Replace water bottle gasket.
Handpiece is not stowed properly iin
holder.
Check kink valve. If it is “unkinked”, make sure
handpieces are fully stowed in holders.
-
Handpiece ON/OFF valve is out of
adjustment.
Check to see if handpiece ON/OFF valve is
activated when handpiece is inserted in holder.
Adjust handpiece ON/OFF valve lever so it
properly activates when handpiece is stowed
in holder.
Handpiece holder valve is malfunctioning
- stuck closed.
Check to see if kink valve of unused handpiece is
“unkinked” even though handpiece is in holder.
Replace handpiece holder valve.
Check valve of malfunctioning handpiece
is defective - stuck open.
Inspect handpiece check valve (connnected to
1/8” clear tubing for handpiece), to see if it is
stuck open - or replace check valve with known
working valve.
Replace handpiece check valve.
Tube connnector malfunctioning
Check for leaks at connection point between
handpiece and tube connnector.
Replace tube connector.
Kink valve is malfunctioning.
Check to see if kink valve is working properly.
Adjust kink valve. Replace kink valve if
necessary.
Coolant water toggle valve is
malfunctioning - bleed port is clogged,
allowing pressure to remain in air line.
Coolant water flush valve is
malfunctioning - stuck open.
While one handpiece is in use, one or
more additional handpieces run while
in holders.
Disconnect orange signal line and check for
residual air pressure (residual pressure indicates
bleed port is not working)
-
4
Replace foot control.
Replace coolant water flush valve.
004-0868-00 [Revised: 1/8/13]
Troubleshooting Chart: Procenter / International (Whip) Delivery Units- continued
Problem
All handpieces run, but
do not function properly.
- continued
Symptom
Check
Solution
Drive air foot pedal valve is malfunctioning
- bleed port is clogged, allowing pressure
to remain in drive air line.
Disconnect 1/4” clear tubing from 1/4” grey foot
control tubing (in J-box). Check for residual air
pressure. (Residual air pressure indicates bleed
port is not working).
Replace foot control.
Master ON/OFF switch is turned OFF,
but kink valves do not “unkink”.
Drive air foot pedal valve is malfunctioning
- bleed port is clogged allowing pressure
to remain in drive air line.
Disconnect 1/4” clear tubing from 1/4” grey foot
control tubing (in J-box). Check for residual air
pressure. (Residual air pressure indicates bleed
port is not working).
Replace foot control.
Master ON/OFF valve malfunctioning stuck open.
Replace suspect master ON/OFF switch valve
with known working valve.
Replace master ON/OFF valve.
Coolant air adjustment valve (on delivery
unit) adjusted too low or malfunctioning.
Check coolant air adjustment valve.
Adjust / replace coolant air adjustment valve.
Damaged or disconnected tubing.
Check 1/8” tubing (between coolant air adjustment
valve in delivery unit) and 1/8” green tubing
(between coolant air adjustment valve and all
handpieces) for damage and proper connection.
Replace damaged tubing. Reconnect tubing
if necessary.
Syringe air adjustment valve (on
Procenter unit) or pinch valve (on Whip
units) adjusted too low or malfunctioning.
Check setting of syringe air adjustment valve.
Adjust / replace syringe air adjustment valve.
Damaged or disconnected tubing.
Check 1/8” yellow tubing (between syringe air
adjustment valve in delivery unit and J-box and
1/8” yellow tubing (between syringe air adjustment
valve and syringe) for damage and proper
connection.
Replace damaged tubing. Reconnect tubing
if necessary.
Coolant air only is not working.
Handpieces work
properly; Syringe has no
air.
Probable Cause
Handpiece runs momentarily after
it is removed from the handpiece
holder even though foot pedal is not
pressed.
Syringe has no air.
5
004-0868-00 [Revised: mo/dd/yr]
Troubleshooting Chart: Procenter Assistant’s Units
Problem
No water to syringe or
water quick connect.
Symptom
With water selector valve (City/Bottle
toggle switch) in either position, no
water is present at syringe or water
quick connect.
With water selector valve (City/Bottle
toggle switch) in BOTTLE position,
no water is present at syringe
or water quick connect. In CITY
position, water is present.
With water selector valve (City/Bottle
toggle switch) in CITY position, no
water is present at syringe or water
quick connect. In BOTTLE position,
water is present.
No water to syringe.
Water quick connect
works properly.
No water present at syringe. Water
quick connect works properly.
No water to quick
conect. Syringe works
properly.
No suction at saliva
ejector or HVE.
Probable Cause
Check
Solution
Water selector valve is malfunctioning.
Remove outgoing water line from water selector
valve, and check if water is present.
If no water is present:
Replace water selector valve.
Damaged or disconnected tubing.
Check 1/8” blue tubing (between water selector
valve and syringe) and 1/4” blue tubing (to
water quick connect) for damage and proper
connections.
Replace damaged tubing. Reconnect tubing
if necessary.
Water bottle is empty.
-
Fill water bottle with distilled water.
Water bottle gasket is leaking.
Check for air leaking around bottle cap.
Replace water bottle gasket.
Water bottle air regulator is out of
adjustment or malfunctioning.
Check air regulator pressure setting.
Adjust air regulator output pressure to 30
PSI.
Clean / replace air regulator if necessary.
Water bottle air regulator (in console or
L/R arm) is malfunctioning.
Water bottle air regulator output pressure should
be 30 PSI.
Replace regulator if necessary.
Damaged or disconnected tubing.
Check 1/8” brown tubing (between water bottle air
regulator in J-box and water bottle) for damage
and proper connections.
Replace damaged tubing. Reconnect tubing
if necessary.
Check 1/8” blue tubing (between water bottle
and water selector valve) for damage and proper
connection.
Replace damaged tubing. Reconnect tubing
if necessary.
Water selector valve is malfunctioning.
Replace suspect valve with known working valve.
Replace water selector valve.
Water manual shut-off valve in J-box is
turned off or malfunctioning.
Check that water manual shut-off valve is ON.
Contact licensed plumber to replace manual
shut-off valve.
Damaged or disconnected tubing.
Check 1/8” blue tubing (between air regulator in
J-box and water selector valve) for damage and
proper connections.
Replace damaged tubing. Reconnect tubing
if necessary.
Water selector valve is malfunctioning.
Replace suspect valve with known working valve.
Replace water selector valve.
Pinch valve (in assistant’s unit) adjusted
too tightly.
-
Loosen pinch valve.
Syringe valve is malfunctioning.
Replace suspect valve with known working valve.
Replace syringe button valve.
No water to quick connect port.
Syringe works properly.
Water quick connect valve is
malfunctioning.
Replace suspect valve with known working valve.
Replace water quick connect valve.
With ON/OFF lever(s) open, there is
insufficient suction at saliva ejector
and HVE.
Central vacuum unit is OFF or
malfunctioning.
Check central vacuum unit.
Contact service provider for central vacuum
unit if necessary.
Damaged or disconnected tubing.
Check 5/8” grey vacuum tubing (between asst’s
unit and central vacuum connection in J-box) for
damage and proper connections.
Replace damaged tubing. Reconnect tubing
if necessary.
Hole plug(s) missing from solids collector
Check solids collector.
Replace hole plug(s) on solids collector.
6
004-0868-00 [Revised: 1/8/13]
Troubleshooting Chart: Midmark Cuspidor
Problem
Symptom
Probable Cause
No water at cup filler and
bowl rinse.
Neither cup filler or bowl rinse have
water. Handpieces & syringe work
properly.
Damaged or disconnnected tubing.
No water at cup filler.
When either cup filler button is
pressed, no water comes out; Bowl
rinse works properly.
Cup filler flow adjustment valve set too
low.
No water at bowl flush.
Water to bowl flush runs
continuously.
When bowl flush push button is
pressed, no water comes out; cup
filler works properly.
Water to bowl flush runs
continuously; Cup filler works
properly.
Check
Solution
Check 1/4” blue tubing (between J-box and
cuspidor)for damage and proper connnections.
Replace damaged tubing. Reconnect tubing
if necessary.
Check 1/8” tubing [between cuspidor and console
(connnection box under seat on LR chair)] for
damage and proper connections.
Replace damaged tubing. Reconnect tubing
if necessary.
-
Adjust cup filler flow adjustment knob.
Cup fill push button valves malfunctioning.
Replace suspect cup fill push button valves with
known working valves.
Replace cup fill push button valves.
Cup fill (pilot / primary) air valve
malfunctioning.
Replace suspect valve with known working valve.
Replace cup fill (pilot / primary) air valve.
Cup fill water valve malfunctioning.
Replace cup fill water valve with known working
valve.
Try to flush any debris out of valve. Replace
cup fill water valve if necessary.
Damaged or disconnected tubing.
Check 1/8” white tubing (between two cup filler
push button valves and shuttle valve) and 1/8”
white tubing (between shuttle valve and cup
filler air timing valve) for damage and proper
connections.
Replace damaged tubing. Reconnect tubing
if necessary.
Check 1/4” yellow tubing (between two cup filler
air timing valves) for damage.
Replace damaged tubing. Reconnect tubing
if necessary.
Check 1/8” red tubing (between two cup filler air
timing valves and cup fill water valve) for damage.
Replace damaged tubing. Reconnect tubing
if necessary.
Check 1/4” blue tubing (between two cup filler
adjustment valve and cup fill water valve) for
damage.
Replace damaged tubing. Reconnect tubing
if necessary.
Bowl flush push button valve
malfunctioning.
Replace push button valve with known working
valve.
Replace bowl flush push button valve.
Bowl flush control pinch valve adjusted
too tightly.
Check adjustment of valve.
Adjust pinch valve.
Bowl flush water valve is malfunctioning.
Replace suspect valve with known working valve.
Try to flush any debris out of valve. Replace
bowl flush water valve if necessary.
Damaged or disconnected tubing.
Check all 1/8” red tubing (between bowl flush
push button valve, bowl flush solenoid, bowl flush
air timing valve, and bowl flush water valve) for
damage and proper connections.
Replace damaged tubing. Reconnect tubing
if necessary.
Check 1/4” blue tubing (between bowl flush pinch
valve and bowl flush water valve) for damage and
proper connections.
Replace damaged tubing. Reconnect tubing
if necessary.
Bowl flush push button valve
malfunctioning.
Replace suspect valve with known working valve.
Replace bowl flush push button valve.
Bowl flush water valve is malfunctioning.
Replace suspect valve with known working valve.
Try to flush any debris out of valve. Replace
bowl flush water valve if necessary.
Bowl flush solenoid is malfunctioning.
Check for voltage across solenoid.
If no voltage is present, replace bowl flush
solenoid.
If voltage is present, replace chair PC board.
Refer to service information for dental chair.
7
004-0868-00 [Revised: mo/dd/yr]
Troubleshooting Chart: Midmark Cuspidor - continued
Problem
Symptom
Water to cup filler runs
continuously.
Water to cup filler runs continuously;
Bowl rinse works properly.
One of the cup filler push button valves
stuck open.
Probable Cause
Replace suspect valve with known working valve.
Check
Replace cup filler push button valve.
Solution
Bowl flush works when
button is pressed, but
does not run for desired
length of time.
Bowl flush stops immediately after
button is released or does not run
for desired length of time (too long /
too short).
Bowl flush timing adjustment valve out of
adjustment or malfunctioning.
Adjust bowl flush timing adjustment valve.
Replace bowl flush timing adjustment valve.
Cup fill works when
button is pressed, but
does not run for desired
length of time.
Cup fill stops immediately after
button is released or does not run
for desired length of time (too long /
too short).
Cup fill timing adjustment valve is out of
adjustment or malfunctioning.
Adjust cup fill timing valve.
Replace cup fill timing adjustment valve.
Cuspidor will not drain.
Cuspidor bowl overflows.
Damaged drain line.
Check drain line for damage.
Replace drain line.
Clogged drain line or facility drain.
Check drain line and facility drain for clogs.
Clear drain of any possible obstructions.
8
004-0868-00 [Revised: mo/dd/yr]
Troubleshooting Chart: Flex Arm
Problem
Flex arm will not lock.
Flex arm will not unlock.
Flex arm drifts.
Excessive rotation.
Symptom
Flex arm will not lock.
Probable Cause
Check
Solution
Lock pawls damaged.
Inspect lock pawls for damage.
Replace lock pawls.
Lock cylinder valve in flex arm is
malfunctioning.
Remove 1/8” brown tubing from lock cylinder
and check for residual air pressure. (Residual air
pressure indicates bleed port is not working).
Replace lock cylinder.
Unlock button valve(s) on delivery unit
handles malfunctioning.
Without depressing unlock button(s), remove 1/8”
brown tubing from unlock button valves and check
for air pressure.
If air pressure is detected,
Replace unlock button valve(s).
Lock cylinder energizes, but flex arm
will not unlock.
Locking pawls in flex arm have become
loose and slipped off of arm lock cylinder
pin.
Check to see if pawls are installed on arm lock
cylinder pin.
Re-install locking pawls back on arm lock
cylinder pin then tighten mounting hardware.
Lock cylinder does not energize.
Unlock button valve(s) on delivery unit
handles malfunctioning.
While depressing unlock button(s), remove 1/8”
brown tubing from unlock button valves and check
for air pressure.
If air pressure is not detected,
Replace unlock button valve(s).
Lock cylinder valve in flex arm
malfunctioning.
While depressing unlock button(s), remove 1/8”
brown tubing from lock cylinder valve and check
for air pressure.
If air pressure is detected,
Replace lock cylinder valve.
Flex arm drifts down.
Spring tension jam nut in flex arm out of
adjustment.
-
Tighten spring tension jam nut.
Flex arm drifts up.
Spring tension jam nut in flex arm out of
adjustment.
-
Loosen spring tension jam nut.
Flex arm can be rotated more than
120°.
Rotation stop pins (on top of flex arm)
missing or broken.
Check for missing stop pins.
Replace stop pins.
Rotation stop screw (on top of flex arm)
missing or broken.
Check for missing rotation stop screw.
Replace rotation stop screw.
9
004-0868-00 [Revised: mo/dd/yr]
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