7-6
Disassembly and Repair
Pump rebuild
1 “-‘f,,
Figure 7.13 - Crossover Tube
Components:
7 Crossover Tube
2 O-ring
3 Back-up Ring
I
Figure 7.74 - Siphon Ball Components.
I
Figure 7.15 -
Pressure Ball Components:
1 Pressure Ball Seat
2 Pressure Ball
Disassembly
(continued)
20. Remove the crossover tube (1). Inspect the o-ring (2) and back-up
ring (3). Replace if necessary.
21. Unscrew the siphon ball seat from the pump body.
22. Pull the siphon ball seat and its cage from the pump body.
23. Pull the piston out of the pump body.
a
WARNING: Avoid scratching the pump piston or the inside
1
of the pump body during disassembly. Surface scratches on
l
these parts may cause excessive leakage during operation.
24. Remove the pressure ball seat (1) and the pressure ball (2) from the
piston by unscrewing the seat from the piston.
25. Inspect both the pressure and the siphon balls and their seats for
wear or damage. Replace if necessary.
aa
WARNING: Do not heat Type R solvent with an open flame
or in an unregulated heating devise. Do not heat type R
solvent above 246X (475’ F).
26. Heat a container of Type R solvent to the melting temperature of the
adhesive material being used. Clean all components of the pump.
P/T’4 106 701A
41-23OOSP - Issued 1194
8 Nordson Corporation 1994
All Rights Reserved
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