ITW Dynatec DM55 DynaDrum - Pump Disassembly

ITW Dynatec
Chapter 7
Maintenance and Repair Notes
Page 120 DM55 DynaDrum PP V6, Manual No.21-18, Rev.2.19
7.9 Pump Disassembly
WARNING
Heed all security advices given in chapter 7.1.
Maintenance and repair work is only permitted for skilled personnel!
Always wear safety shoes, heat-resistant protective gloves, safety goggles and
protective clothing that cover all vulnerable parts of the body while working on
the heated unit! Risk of injury or severe burns!
Prior to disassembly:
• Heat the unit above the softening point of the material being pumped by the unit.
• Switch pump motor OFF.
• Activate the applicator to relieve pressure.
• Elevate the platen to full UP position to make work easier.
• Disconnect main electrical power.
• Disconnect air pressure at air control panel.
• Provide safety blocking under the platen.
WARNING
Place safety blocking (lid and fiber separator sheet between the lid and platen)
under the platen to prevent platen lowering of platen.
Disassembly and replacement:
Referencing the component illustrations of the 114350 Piston Pump Assembly, perform
the following procedures:
1. Remove the piston pump according to the “Piston Pump Assembly Replacement”
procedures on previous page.
2. Place the pump assembly on a workbench lined with release paper or another non-
stick material.
3. Remove the inlet check valve assembly (Item 10, PN 116381) at the bottom of the
pump. Disassemble the assembly by removing the retaining pin and ball. Clean and
reassemble.
4. Carefully remove the -337 O-ring (Item 22, PN 114360) on the bottom of the pump
body. Clean and inspect. (Replace any damaged O-rings found while working through
this procedure).
5. Remove the pump outlet manifold bolts (Item 17, PN 109793) and manifold (Item 16,
PN 114300 or other optional manifold supplied). Remove pressure relief assembly
(Item 38, PN 801241).
6. Remove the hose manifold connector tube (Item 41, PN 116183). Inspect the O-rings
for damage and clean or replace.
7. Remove the relief outlet nozzle assembly (Items 35, 36 & 37) on the bottom of the
pump. Inspect and clean. Using a long brush, ensure that the connection holes from
the relief outlet nozzle assembly to the outlet manifold‘s relief cavity are clear and
clean.
8. Bend down the tangs of the bearing lock washer (Item 20, PN 114354) which lock the
bearing lock nut (Item 19, 114357). Remove the lock nut, lock washer and tie rod
plate. Set aside.