13. Turn pump motor switch on and carefully tighten pump
mounting screws while pump is turning. This will align the
pump with the drive shaft assembly.
14. Observe motor and drive shaft coupling. Check for
misalignment. If necessary, loosen and retighten motor
mounting bracket to realign. Replace rear panel.
8.4.2 V4 and V3 Drive Shaft Assembly Replacement
© Copyright Astro Packaging 2009 KB30, KB50 and KB100 Series Hot Melt Units 19600-159 Rev. A 04/09/09 43
1. If it is possible and can be safely done, pump out all of the hot
melt material in the melt unit, then switch off the system power
switch and allow the melt unit to completely "cool down".
Otherwise switch off system power switch and allow hot melt
material in tank to completely solidify.
2. Switch on system power switch for about 10 minutes to allow melt
unit to warm up enough to permit removal of drive shaft assembly.
3. Remove back panel and remove motor, mounting assembly,
and motor coupling.
4. Remove the two socket head cap screws that hold the drive
shaft block to the pump block. Pull the drive shaft assembly off
the pump block.
5. Dismantle drive shaft assembly by pressing the motor side of the
shaft through the block. Support the block so the ball seal is free to
come out with the drive shaft.
6. Clean all parts and inspect for wear, replace as required.
7. Replace the ball seal in the block. Apply small amount of high
temperature lubricant, (Astro Packaging p.n. 30122-3) to the drive
shaft in the area of the ball seal.
8. Reassemble drive shaft assembly in reverse order.
9. Refit drive shaft assembly to pump block, replace gasket if
required. Do not fully tighten mounting screws.
10. Switch on system power switch and allow tank heaters to warm up
enough to permit turning of the pump drive shaft.
11. Turn pump shaft and allow the drive shaft assembly to self-align
with the pump. Tighten drive shaft assembly mounting screws and
again rotate shaft by hand, to see that it turns freely. Realign if
required.
12. Replace motor, mount assembly, and coupling. Do not fully
tighten mounting bolts.
13. Switch on pump motor switch and check misalignment of
motor drive shaft. Adjust motor mount position as required and
tighten bolts. Check again for misalignment and readjust motor
mount position if required.
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