- 4 –
ZVP-PC-0068-00-R2
THE UNIT HAS BEEN RUNNING FOR ANY
LENGTH OF TIME, USE HEAT RESISTANT
GLOVES WHEN WORKING ON THE
CENTRIFUGAL SPEED LIMITER.
5.4.3
Remove the centrifugal speed limiter housing.
5.4.4
Inspect the centrifugal speed limiter brake shoe
linings for wear and ensure that both brake
shoes pivot freely, replace the brake shoes if
worn.
5.4.5
Inspect the internal braking surface of the
housing for grooving and machine or replace if
badly grooved.
5.4.6
Check the front U seal and felt seal while the
centrifugal speed limiter assembly is dismantled,
it is advisable to change both seals if either is
worn.
5.4.7
Clean the outer face of the front bearing of any
dust residue.
5.4.8
Reassemble.
5.5
Spindle tube and bearings
5.5.1
Remove both the rear base and seal retainer
assembly and the centrifugal speed limiter
housing assembly.
5.5.2
Remove the rear circlip.
5.5.3
Drive or press the spindle tube forward through
the body.
5.5.4
Extract or pull the bearings from the body.
5.5.5
Reassemble.
6.0
TROUBLE SHOOTING GUIDE
6.1
Rotating nozzle head will not rotate or
rotates slowly.
6.1.1
Insufficient air pressure, check supply.
6.1.2
Blocked blast nozzles, inspect and clear
obstruction.
6.1.3
Flanged wear sleeve has abrasive particles
embedded, remove and replace.
6.1.4
Damaged bearings, replace bearings.
6.1.5
Check rear compression spring, if damaged
replace.
6.2
Rotating nozzle head rotates too fast.
6.2.1
Centrifugal speed limiter brake shoes are worn
out, replace.
6.2.2
Check rear compression spring, if damaged
replace.
6.3
Vibration
6.3.1
One blast nozzle is plugged, inspect and clear.
6.3.2
Blast nozzles out of balance, i.e. one nozzle has
worn more than the other or blast nozzles are
not of the same type, inspect and replace.
6.3.3
Tornado tool is loose in the carriage, inspect
and tighten.
