Tennant ATLV 4300 Service Manual page 64

VACUUMING
8. Go to the top of the hopper plenum and
remove the vacuum fan assembly from the
machine. Set the assembly up side down on
a flat surface.
9. Pull the vacuum fan impeller off the fan
motor shaft. Retain the key from the motor
shaft.
10. Install the new vacuum fan impeller onto the
motor shaft.
NOTE: Make sure to use the key that was
removed with the old impeller.
11. Turn the assembly over and place it back on
top of the hopper plenum. Hold the impeller
in place while turning over. Line up the holes
in the motor bracket with the holes in the
cover.
12. Go under the hopper cover and install the
four hex screws into vacuum fan assembly
retainer plate. Leave the hardware loose for
now.
13. Reinstall the impeller screen, spacer, and
sleeve onto the vacuum fan motor shaft.
14. Use blue loctite (242) on the threads of the
impeller screen hardware. Reinstall the one
M8 hex screw and three M6 flat screws.
15. Tighten the M8 hex screw to 18 -- 24 Nm
(15 -- 20 ft.. lb) and the M6 flat screws to
8 -- 10 Nm (6 -- 8 ft.. lb).
16. After the screen has been tighten down,
center the string guard (on the retainer
plate) around the outside of the screen.
Tighten the four screws to 18 -- 24 Nm
(15 -- 20 ft. lb).Use blue loctite (242) on the
threads of this hardware.
17. Reinstall cover assembly onto the hopper
plenum.
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ATLV 4300 330495 (10- -98)