Ransburg M90 Handguns 77073, 77132 - Manual (Page 24)

AH-99-01.3
M90 Handguns - Maintenance
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8. If the Teflon seal does not pull out with
the fluid tube, care must be taken when
removing this part not to damage the
sealing surfaces within the barrel’s fluid
inlet chamber.
9. There is no need to remove the retaining
ring or nut from the barrel unless they
are damaged. If they are to be replaced,
lift one end of the retaining ring over the
captive ridge and spiral it off the end of
the barrel. Then the retaining nut can be
removed.
> Use care in removing the retaining ring.
If it is spread too much it could break.
C A U T I O N C A U T I O N C A U T I O N C A U T I O N C A U T I O N !!!!!
Disassembly Disassembly Disassembly Disassembly Disassembly
1. Remove the trigger adjustment nut and
spring retainer from the needle shaft us-
ing two 3/8-inch open end wrenches.
2. Position the barrel so the front is facing
down. Using the small spanner tool on
the special multi-purpose wrench, un-
screw the packing nut from the rear of
the barrel by turning it counterclockwise.
3. Holding the barrel in one hand and with
a firm pull, remove the needle shaft as-
sembly from the packing chamber of the
barrel. The trigger adjustment nut can
be reinstalled for additional grip.
4. Remove the packing nut, rear seal re-
tainer, seal container subassembly, and
packing tube from the rear of the needle
shaft. The spring-loaded u-cup and o-
ring can now be removed from the seal
container.
5. Loosen the ball valve needle using two
2.5mm wrenches to unlock the jam nut.
Then unscrew both parts off the front of
the needle shaft. The seal spreader, u-
cup seal and seal pusher can now be
removed.
6. Remove the valve seat body and Teflon
seal from the front of the barrel using the
nozzle wrench. If the seal does not pull
out with the valve seat body, care must
be taken when removing this part not to
damage the sealing surfaces within the
barrel chamber.
Cleaning and Inspection Cleaning and Inspection Cleaning and Inspection Cleaning and Inspection Cleaning and Inspection
1. Clean the packing chamber of the barrel
with a suitable solvent and a soft bristle
bottle brush. Do not submerge or soak
the barrel in solvent. If the chamber has
dry paint in it and cannot be cleaned out,
the barrel MUST BE REPLACED.
2. Examine the plastic section of the
needle shaft and the packing tube for
signs of carbon tracking. Also inspect
the air passages and packing chamber
of the barrel for signs of scratches, addi-
tional carbon tracking, or dried paint.
Shine a small flashlight into the front of
the barrel to highlight any damage in
these areas.
> Soaking or submerging the barrel could
allow solvents into the high voltage section
of the barrel, leading to gun failure and/or
possible dangerous conditions that could
result in property damage and personnel
injury.
W A R N I N G W A R N I N G W A R N I N G W A R N I N G W A R N I N G !!!!!
3. Inspect the sealing area on the front
needle shaft section for wear. If any
signs of roughness or unevenness are
found, the needle shaft must be re-
placed.
> Barrels with dry paint, scratches, or high
voltage tracking marks in the air and/or
packing chamber passages MUST BE
REPLACED. Neglecting to replace the
barrel may lead to reduced gun efficiencies
and premature component failure.
C A U T I O N C A U T I O N C A U T I O N C A U T I O N C A U T I O N
!!!!!
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