Nordson 1050729 User manual

Instruction Sheet P/N 1032546C04
Pump Service Kit - P/Ns 1050729 (7.8 cc),1067875 (7.8 cc PA), 1086938 (7.8 cc machined), 1050728 (4.9 cc),
or 1069146 (4.9 cc PA) 4/08
This instruction sheet describes the replacement of the pump assembly
in a DuraBluetadhesive melter. Kit P/Ns 1067875 and 1069146 contain
high-temperature, chemical resistant O-rings (referred to in this
instruction sheet as PA).
WARNING: Risk of personal injury or equipment damage! Refer to
the safety information provided in the melter manual before
servicing the melter. Failure to comply with the safety information
provided can result in personal injury, including death.
Required Tools:
Phillips-head screwdriver
10- and 13-mm wrenches
3- and 4-mm hex keys
Pump
Pump O-rings
Machine key
M8 x 90 mm screws w/washers
(spare)
Parker lubricant
3. Switch the melter off.
6. Remove the right-side coupling cover.
8. Remove the four M8 pump screws
and matching washers that attach the pump
to the bottom of the tank.
7. Remove the RTD and the heater from
the pump body. Save the screws, washer,
and, if applicable, the RTD retaining clip.
Note: When reassembling the drive
assembly to the tank, tighten the M8 pump
screws to 16.3–17.6 N•m (12–13 ft-lb.).
2. For D4 melters, operate the melter until the tank is
completely empty. For D10 and D16 melters, close the tank
shut-off valve (position 2 is closed; position 1 is open.).
4. Disconnect power to the melter at the local power
disconnect switch.
1. Allow the melter to heat up to Ready status. Refer to the
operation section of the melter product manual for information
about operating the melter.
5. Disconnect all hoses from the manifold.
Continue
WARNING: Risk of electrocution! The control switch does not
remove high-voltage power from the melter. Before opening the
electrical compartment door, ensure that the local power
disconnect switch is in the off position and locked. Failure to
properly disconnect the power from the melter can result in
personal injury, including death.
Remove the Drive Assembly
Note: Retrofit kit P/N 1064357 is required
when replacing the pump assembly on a
melter that has a sheet metal-type drive
assembly bracket (shown to the right).
Old design New design
1
2
Note: On some melters, a retaining clip
is not present because the RTD is housed
in a slot between the pump housing and the
manifold.

3. Remove the four screws that secure the pump and the
pump bracket (C) to the motor and then separate the pump
from the pump coupling half. Discard the machine key.
Replace the Pump
2. Loosen the pump shaft coupling half (B) set screw.
5. Using the new machine key (G) provided, install the pump
shaft coupling half on the pump shaft, but DO NOT tighten the
set screw.
4. Lubricate the three new pump O-rings and install them
on the new pump.
1. Remove the two screws that secure the manifold (A) to the pump (D)
and then separate the manifold from the pump.
12. Complete the pump replacement by reversing
steps 2 through 9 of Remove the Drive Assembly.
9. Once the coupling assembly is sliding freely over the
shafts, center the assembly over the shafts such that the star
is above the gap between the two shafts and then set a 2-mm
(0.080-in. ) gap between the star and one coupling half.
11. Clean any residual material from the face of the
manifold and then secure the manifold to the new pump
using the screws removed in step 1. Tighten the screws to
the torque specification indicated in the illustration.
9. Disconnect the motor cable from underneath the melter
and then slide the drive assembly out of the chassis.
7. While aligning both halves of the coupling assembly,
including the bronze center star (F), position the new pump,
the pump bracket, and the motor; then loosely install the four
pump bracket screws.
6. Loosen the set screw on the motor shaft coupling half (E).
8. Check the initial alignment of the drive assembly by sliding
the coupling halves and star back and forth over the motor and
pump shafts. The coupling components should move freely
without binding. If they do not, adjust the position of the motor
until free movement is achieved.
10. Tighten all the coupling set screws and then tighten
the four pump bracket screws to the torque specification
indicated in the illustration.
or 1047564 (PA)
or 1067551 (PA)
or 1047563 (PA)
P/N 941161
6.4 NSm (54−60 in.-lb)
P/N 941230
P/N 940024
13.5−16.3 NSm (10−12 ft-lb)
13.5−16.3 NSm (10−12 ft-lb)
D
C
E
G
B
F
A