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6.4.6. Procedure D3: Replacement of HVU
• Unscrew the HV contact.
• Using a multigrip pliers, extract the HVU from the gun.
• Replace the HVU, apply a light coat of dielectric grease
(P/N H1GSYN037) to the seal of the new HVU.
• Position the HVU in the barrel and push it to the stop.
• Check the condition of the contact o-ring.
Replace it if necessary.
If replacing the O-ring (A), when reassembling, use the
seal assembly tool (B) (P/N: 900018752).
• Place a plug with a layer of dielectric grease on the HV
contact seal.
Screw it to the contact + 1/4 turn. Make sure to leave
a slight protrusion of the screw head in relation to the
surface of the barrel.
A
39
DRT7133
D - 2023/01
B
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