7 General Maintenance
To Disassemble the EI HES
5977B Series MSD Operating Manual 181
To Disassemble the EI HES
Materials needed
• Gloves, clean, lint-free
• Large (8650-0030)
• Small (8650-0029)
• Cloths, clean (05980-60051)
• T6 Torx driver, (8710-2548)
• Tweezers (8710-2460)
Procedure
Refer to the exploded parts view Figure 57 and the EI HES parts list Table 18 on
page 182 while using this procedure.
1 Place a clean cloth on your work surface to hold the ion source parts.
2 Use a T6 Torx screwdriver to remove the screw securing the filament block
to the source mount. Use the finger grip to remove the filament block.
3 Remove the dual filament from the filament block by lifting the source body
up off of the filament block, while holding the filament block so that the dual
filament will not fall and become damaged.
4 Use a T6 Torx screwdriver to remove the two screws securing the source
mount to the source body.
5 Remove the source mount from the lens body.
6 Remove the repeller and ring heater sensor assembly from the source body.
7 Separate the repeller from the ring heater assembly.
8 Use a T6 Torx screwdriver to remove the screw and locking ring for the lens insulator
that secures the lens stack in the source body, then remove the lens stack.
Use care when removing the filament from the filament block. Excessive stress
can crack the filament ceramic. If this happens, do not attempt to operate with
a defective filament, it must be replaced.
Never remove the finger grip from the filament block.
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