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Cleaning 142 VTK - TR -BA- 171e - 1 - User Man u al MDS 3080 -V Step 1: Push t he Tapp et Center ing Screw BY ont o the t a ppet. Step 2: Hold th e tapp e t with t he Tappet Centeri ng Screw BY between t he in dex finger…

Cleaning

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141

Afterwards, clean the outside of the tappet

sealing. Keep using the fluidic brush, especially for

the outer edge.

Then clean the inner rim of the tappet sealing with

a cleaning rod.

Clean the outside of the tappet centering piece

first with a lint-free cloth.

Use a fluidic brush for the bore of the tappet

centering piece.

Important Note!

There is no tappet centering piece, if you use a 2G

tappet rod.

Step 7 (valve body)

Clean the valve with a lint-free cloth.

Step 8 (O-ring)

Clean all O-rings with a lint-free cloth.

Tab. 30: Clean all components by hand

– Dry all the components in the air or with compressed air. For nozzle inserts, we recommend

to use the MDT 324 Nozzle Insert Cleaning Holder.

– A two finger seesaw test is necessary to check if the tappet rod runs smoothly through the

Tappet Centering Screw BY. Otherwise, the parts have to be cleaned again. The table explains

how to perform a two finger seesaw test.

Cleaning

142

VTK-TR-BA-171e-1 - User Manual MDS 3080-V

Step 1:

Push the Tappet Centering Screw BY onto the tappet.

Step 2:

Hold the tappet with the Tappet Centering Screw BY between the index

finger and the thumb. Swivel the tappet half-circularly between a and b. The

Tappet Centering Screw BY must slide smoothly on the tappet in between

the ends.

Remove the Tappet Centering Screw BY from the tappet after the test.

Tab. 31: Two-Finger-Seesaw-Test

In case you still have parts, which are not completely clean after the fine purification, repeat the

corresponding cleaning steps for those components several times, if necessary. If that is still not

helping, contact our Technical Support.

9.4.5 Assembling of the Valve

Re-assemble the valve and its components as follows.

Unusual (connector BY)

In the exceptional case that you removed the

connector BY as well, you have to mount it first.

Place the fluid box body on the receptacle of the

mounting body. Align the bore on the fluid box

body with the bore on the mounting body (see

circles). The fluid box body will fit into the

mounting body, if the mounting direction is

correct.

Push the Connector BY through the mounting

body into the bore of the fluid box body. Screw

the Connector BY tight (clockwise) by using an

MDT 327 (for newer revisions of the Connector

BY you can also use a hexagon key 2.5 or the

Torque Wrench Tool VM with the Bit Hexagon

Key 2.5). Torques are depending on the material

of the mounting body (stainless steel 120 – 140

cN.m, PEEK 70 – 80 cN.m).

Important Note!

Do not press the fluid box body while fastening

the Connector BY, otherwise, it cannot correctly

grip into the fluid box body.

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Step 1 (O-ring)

In case that you removed the O-ring, you have to

mount it onto the fluid box body.

Pull the O-Ring-BY over the fluid box body with a

pair of tweezers.

Step 2 (cartridge base)

Mount the cartridge base onto the fluid box. Use

MDT 327 or the MDT 306 - Torque Wrench Tool

VM with BitVM-A (torque 110 – 120 cN.m) to fix

the cartridge base with the tightening screw by

screwing clockwise.

Important Note!

There are two types of cartridge bases: Cartridge

Base CH (without integrated luer lock) and

Cartridge Base CHI (with integrated luer lock). If

you use a cartridge base without integrated luer

lock, you need to screw the Fluid Box Connector

Luer Lock into the top bore of the cartridge base.

Use the open-ended wrench of the MDT 327

(hexagon screw size M8, torque stainless steel

100 – 120 cN.m, PEEK 40 – 60 cN.m).

Step 3 (tappet sealing)

Push the Tappet Sealing PE/PTFE/HT with the

wider side down onto the pin of an MDT 328 -

Tappet Sealing Changing Tool. Push the MDT

328 with the tappet sealing straight into the

fluid box. When the tappet sealing sits tight, you

will hear a light noise.

Step 4 (tappet centering piece)

Press the tappet centering piece into the fluid

box body. Use the MDT 328 to make sure the

tappet centering piece rests flat on the tappet

sealing.

Important Note!

When using a 2G Tappet rod, you do not need a

tappet centering piece.

Step 5 (tappet and tappet centering screw)

Screw the Tappet Centering Screw BY into the

fluid box. Do not screw it tight yet. Screw it only

for two rotations.