Cleaning The Pump Components; Reassembling The Pump - Nordson 3400 Manual

B 2-14
Pump
Cleaning the Pump
Components

Reassembling the Pump

B2EN-02-[3-PUMP]-5
If necessary, follow this procedure to clean the pump components. If the
components are damaged, replace the entire pump.
WARNING: Risk of fire or explosion. Do not heat Nordson
Type-R cleaning fluid above 246 °C (475 °F). Do not heat
cleaning fluid with an open flame or in an unregulated heating
device.
1. Use one of the following methods to heat the components:
S
Place the components, except for O-rings, in a container of
Type-R cleaning fluid and heat the fluid above the melting point of
the adhesive.
S
Use a flameless heat gun to heat the components, except for
O-rings.
2. Scrub the components with a fine-bristled brush and wipe them with a
clean, dry cloth.
Follow this procedure to reassemble the gear pump assembly.
1. Reassemble the pump components. See Figure B 2-3 for the proper
placement of the shafts, gears, balls, pump plates, and dowel pins.
NOTE: The plates are marked T for top, C for center, and B for
bottom. Use these markings to properly align the plates.
2. Screw the socket-head screws into the top of the pump. Tighten to
19.78–20.91 NSm (175–185 in.-lb).
NOTE: The drive shaft must rotate a full revolution without binding or
dragging before you tighten the screws. To ensure proper alignment,
you may need to strike the side of the pump with a soft-face hammer
while tightening the screws. After tightening the screws, a maximum
of 0.56 NSm (80 in.-oz) of torque is required to turn the drive shaft on
a clean pump.
3. Reattach the crossover tube and the return tube to the pump.
4. Attach the pump to the pump mount. The drive shaft must be free to
rotate after the pump is locked down. Tighten the hex-head screws
and washers to 6.78–9.04 NSm (60–80 in.-lb).
NOTE: Your pump may include a pump mount insulator. If so, place
the insulator between the pump and the pump mount.
41-3000
Issued 11/00
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