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EN 14
4.
F. Replacing the PTV Coupling Fluid
Notes:
•
Before replacing the CRT coupling fluid, ensure the
expansion chamber bladder is fully collapsed. This can be
easily inspected by viewing the bladder through the small
hole on the expansion chamber assembly. If the rubber of
the bladder is not easily visible through the small hole, then
the bladder may be considered collapsed and fluid can be
added. If the rubber of the expansion chamber bladder is
visible at the hole of the expansion chamber, then
replacement of the expansion chamber bladder is required.
•
The CRT coupling fluid is critical to the optical performance
of the PTV. Use only part number 4835 310 67032 (3 bottle
kit) or 4835 310 67031 (1 bottle) to ensure the optical
integrity and performance reliability of the PTV when
replacing the CRT coupling fluid.
1. Reinstall the CRT gasket into the gasket channel of the
coupler. Confirm the placement of the CRT, C-element
lens, and vent plug gaskets.
2. Place the CRT onto the coupler with the high voltage
anode lead positioned as marked in step 10 of procedure
B.
3. Carefully position the CRT onto the coupler, using the
outline defined in step 6 of procedure B as a reference.
4. Start the CRT mounting ear screws but do not tighten
them.
5. Tighten the CRT mounting ear screws in a star pattern (like
tightening lug nuts on the wheel of a car). Make sure the
CRT does not shift position from the outline defined in step
B6.
Caution: do not over tighten the CRT ear screws (the CRT
mounting ear screws are not used on some assemblies).
6. Install the CRT mounting bracket and start the four CRT
mounting bracket bolts with springs.
7. Tighten the bolts in a star pattern.
8. Lay the CRT assembly on its side with the plug pointing up.
9. Remove the plug.
10. Using the PTV coupling fluid bottle with the cone top, refill
the coupler with fluid through the drain access hole.
Completely fill the coupler chamber so the fluid is level with
the top of the coupler at the plug. Wipe any excess fluid
from around the coupler.
11. Reinstall the plug and check for any fluid leaks.
12. Install the repaired CRT/optical block assembly into the
PTV and perform any necessary adjustments.
4.3
Set Re-assembly
To re-assemble the whole set, execute all processes in reverse
order.
Note: While re-assembling, make sure that all cables are
placed and connected in their original position
EBJ1.0U
Mechanical Instructions
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