Maintenance And Cleaning; Thorough Cleaning - TECHCON SYSTEMS TS5420 Manuel D'utilisation

8.

Maintenance and Cleaning:

Tool required: 5/8" open-end wrench; Snap ring pliers, O-ring removal tool (P/N
TSD1597-7).
Normally, purging the valve with appropriate flush material or solvent after use is
sufficient for cleaning. However some material may cause a buildup in the valve
chamber, in this case periodic and thorough cleaning will be required.
NOTE:
•
To replace seals, please order seal kit part number: 5420-SEALKIT
•
To repair valve, please order valve kit part number: 5420-VALVEKIT
CAUTION: Make sure the fluid pressure is released before disassemble the valve.

8.1 Thorough Cleaning

Refer to figure 5.0
1) Release fluid pressure.
2) Disconnect fluid line and remove fluid inlet fitting.
3) Disconnect valve air hose.
4) Turn the stroke control knob (15) two turns counterclockwise from closed position.
5) Hold the fluid housing (8) and rotate the air cylinder (2) counterclockwise. When
completely un-threaded, pull the two valve segments straight apart to separate.
6) Inspect o-ring (6), replace o-ring if damaged found.
7) Remove cup seal (7), replace seal if damaged found.
8) Remove luer adapter assembly (9).
9) Clean the fluid housing (8), needle/piston assembly (5) and luer adapter
assembly (9).
NOTE: Avoid using sharp probes for cleaning. Any nicks or scratches on the seal or the
surfaces of the needle/piston assembly may cause leakage.
10) Insert cup seal (7) into fluid housing (8) using a soft rod (such as wooden dowel or
plastic). Make sure the o-ring side is facing down.
11) Reinstall luer adapter assembly (9) to fluid housing (8).
12) Lubricate o-ring (6) with o-ring grease.
13) Thread the air cylinder/needle assembly into fluid housing. Make sure not to cross
.
thread
Techcon Systems is an OK International Brand
Copyright © All Rights Reserved • TS941 Rev 04/04
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8.2 To Replace Seal in Air Cylinder
1) Hold the fluid housing (8) and rotate the air cylinder (2) counterclockwise. When
completely un-threaded, pull the two valve segments straight apart to separate.
2) Remove stroke control knob (15) by rotating it in counterclockwise direction.
3) Remove compression spring (1).
4) Using the snap ring pliers, remove the retaining ring (3).
5) Remove Mylar washers (14).
6) Pull the needle/piston assembly (5) straight out from the air cylinder (2)
7) Using the snap ring pliers, remove the retaining ring (11).
8) Remove the nylon washer (12) from the air cylinder.
9) Using o-ring removal tool, remove o-ring (13).
10) Replace all o-rings if necessary.
11) Lubricate all o-rings with o-ring grease.
12) Reinstall o-ring (13).
13) Reinstall nylon washer (12) and secure with retaining ring (11).
14) Thread the air cylinder (2) into fluid housing (8). Make sure not to cross thread.
15) Reinstall needle/piston assembly (5) and secure with retaining ring (3).
16) Reinstall first Mylar washer on the needle/piston assembly.
17) Reinstall compression spring (1) into air cylinder (2).
18) Reinstall second Mylar washer in the stroke control knob (15).
19) Reinstall stroke control knob (15).
1 2 3 4
15 1 4 1 3
Figure 5.0
Techcon Systems is an OK International Brand
Copyright © All Rights Reserved • TS941 Rev 04/04
10
5 6 7 8
12 11 1 0
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