Nelson Irrigation Corporation 848 Airport Rd. Walla Walla, WA 99362-2271 USA Tel: 509.525.7660 Fax: 509.525.7907 [email protected] Web site: www.nelsonirrigation.com
LOWER BEARING MAINTENANCE
DISASSEMBLY
(LOWER UNIT)
STEP 14
Remove #6585 Cover from shaft.
Remove #6997 Seal from cover.
Remove #6996 Brake Ring and
#7009 Dust Seal from shaft.
Inspect all parts for wear and
replace as required.
REASSEMBLY
(LOWER UNIT)
STEP 15
Assemble #7009 Dust Seal onto
#7031 Shaft Assembly. Slide
#6996 Brake Ring onto shaft.
Locate the four studs of the brake
ring in the center holes between
the smaller threaded holes.
STEP 19
Install 7007-001 O-Ring into
Spacer and mount onto assembly.
SEE BACK PAGE FOR PARTS LIST
STEP 13
Remove the #6998 Seal. To
remove the two #6559 Bearings
use a hammer and three blocks
of wood. Lightly tap uniformly
around inner race of bearing until
removed. Bearings are removed
from opposite sides of the #8472
Housing.
STEP 18
Install #6999 O-Ring in #7003
Retainer and assemble retainer on
shaft. Using method described in
disassembly (Lower Unit) instructions
Step 12, secure bearing shaft from
rotating. Torque Retainer to 95-110
ft. lbs. Apply a light coating of #9673
Silicone Grease to O.D. of Retainer.
Assemble #6998 Lip Seal. Orient
with lip side out. Metric Torque =
129-149 NM or 13-15 MKG.
STEP 12
The #10083 Retainer Assembly
is removed by using spanner
wrench. To hold the #7031 Shaft
Assembly from rotating insert two
5/16-18 bolts (#6635) into shaft
top. Clamp bolt heads into a vise
securely. Remove retainer and
#8472 Housing from bearing
shaft.
STEP 17
Assemble #6566 Gasket. Press
on #8472 Housing. Fully pack
housing with #6143 Lubricant.
Assemble #6559 Bearing into
housing.
STEP 11
Remove three #7990 or #7991
bolts from flange. Separate
#8472 housing from #10087
Spacer Assembly. Remove #7007
O-Ring from #10087 Spacer
Assembly.
STEP 16
Place #6997 Lip Seal into #6858 cover
as shown with Nelson name toward
ball bearing. Pack #6559 Bearing
with #6143 lubricant or equivalent.
(See “Notes on Lubrication” on the
front cover.) Press bearing into #6858
Cover. Slide cover assembly onto
bearing shaft. CAUTION: Do not get
grease on brake surfaces. To clean
plastic brake, use soap and water
(solvents may damage plastic). Clean
#6858 cover with acetone.
2/18
#8472
#10083
#6858
#6997
#6996
#7031
#6996
or #9492
#7009
#6997
#6559
#6998
#10083
#7007-001
#10087 Spacer Assembly
#7991
or 7990
#10087
#7007
(Bronze Model #9492)
STEP 20
Assemble #8967 O-Ring into the
Flange Adapter. Mount Flange
Adapter using required Bolts. Torque
Bolts to 130-150 inch pounds.
O-Ring
#8967
