Duff-Norton NZ-100 - Manual (Page 8)

Use degreasing solvent to remove grease
or oil from all parts.
Use clean hot water or a soap solution for
general cleaning of painted surfaces.
Dry parts thoroughly after cleaning.
4-6. Cleaning
Clean all parts and inspect for wear or damage.
4-7. Inspection
Inspect bearings for damaged race surfaces.
Inspect seals for cut or brittle lips. Replace any
defective parts, using only Duff-Norton supplied or
approved parts
4-8. Assembly
(Refer to Figure 5-1)
8
Remove grease from unit and do not
reuse old grease.
Before installing new parts, remove
any rust preventive, protection
grease, etc.
Note
1.
2.
3.
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
If new nut is being used, spot drill the nut
threads
for the setscrews. Setscrews must not
protrude above the surface of the tube, to
avoid interference with nylon nut guide.
Pump grease into the trunnion housing until it
oozes around bearing.
Be sure nylon nut guide is in place.
Be sure guide bushing and wiper seal are in
outer tube. Slide outer tube over translating
tube and screw all the way onto trunnion
housing. Tighten outer tube setscrews.
Pump several ounces of grease into the guide
bushing grease fitting.
Coat drive key(s) with anti-seize compound or
moly-sulphide grease. Reinstall any keys,
bushings, or retaining rings used on drive end
of screw.
Slide trunnion housing and gearbox together,
with adapter flange, if used. Install metric
screws.
Reinstall limit switch. Be sure to readjust limit
switch after installation.
Install ball nut on screw. Hold ball nut arbor
against screw and twist on nut, being careful
not to lose balls.
Install stop washer and bolt. Use high strength
thread locking adhesive on bolt.
Pack load bearings with grease and install in
trunnion housing. Insert journal bushings into
bearings. Slide screw through bushings.
Install slotted nut on screw. On models with
ball bearings, tighten nut finger tight. On
models with tapered roller bearings, tighten nut
enough to provide some preload, but not so
much as to make the screw hard to turn by
hand.
Install pin through slotted nut. If pin is not
secure in hole it must be replaced. Install two
pipe plugs in trunnion housing.
Fill translating tube about half full of grease
(see 3-1). Screw translating tube onto ballnut.
It is critical that these setscrews be
spot-drilled, tightened, and secured
with thread locking adhesive.
Note
WARNING
Provide adequate ventilation during
the use of cleaning agents; avoid
prolonged breathing of fumes and
contact with skin. Read & follow
manufacturer’s instructions.