Instruction manual

VHS-4, VHS-6 and VHS-250 Diffusion Pumps

D R A F T 6 / 1 8 / 1 3

Section 5. Replacement Parts

Table 5-1 lists the VHS-4 models.

Table 5-2 lists the VHS-4 replacement parts available from Agilent.

Table 5-1 VHS-4 Models

Pump Voltage

Part Number

Flange Type

ASA ISO Conflat

Standard cold cap 120 V 86460301 L6256301 L6188301

Extended cold cap 120 V 86460311 L6256311 L6188311

Standard cold cap 208 V 86460306 L6256306 L6188306

Extended cold cap 208 V 86460316 L6256316 L6188316

Standard cold cap 240 V 86460302 L6256302 L6188302

Extended cold cap 240 V 86460312 L6256312 L6188312

Table 5-2 VHS-4 Replacement Parts

Part Number Description

86488301 Standard Cold Cap Assembly

F6898301 Extended Cold Cap Assembly

L8908301 Sight Glass Repair Kit

F4785301 Jet Assembly

F4780 301 Splash Baffle

86754 301 Foreline Baffle Assembly

642906025 Switch

699006025 Standoff, ceramic insulating, Cold Cap

647304205 120 V / 1450 watt Heater Element

647304210 208 V / 1450 watt Heater Element

647306250 240 V / 1450 watt Heater Element

656179100 Wire, No. 10 stranded, nickel

648056680 Lugs, Replacement, nickel