Nelson Irrigation Corporation 848 Airport Rd. Walla Walla, WA 99362 USA Tel: 509.525.7660 Fax: 509.525.7907 E-mail: [email protected] Web site: www.nelsonirrigation.com
LOWER BEARING MAINTENANCE
DISASSEMBLY
(LOWER UNIT)
REASSEMBLY
(LOWER UNIT)
STEP 14
Remove #8400 Cover from shaft.
Remove #8372 Seal from cover.
Remove #8371 brake ring and
#8473 dust seal from shaft.
Inspect all parts for wear and
replace as required.
STEP 15
Assemble #8473 Dust Seal onto
#8459 Shaft Assembly. Slide
#8371 Brake Ring onto shaft.
Locate the four studs of the brake
ring in the center holes between
the smaller threaded holes.
STEP 19
Assemble #8461 Gasket. Install
#8475-001 O-Ring in #8401
Flange and mount onto assembly
using three #8462 Bolts. Torque
bolts to 130-150 in. lbs.
SEE BACK PAGE FOR PARTS LIST
STEP 13
Remove the #8373 Seal. To remove
the two #6253 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 #8405
Housing.
STEP 18
Install #6548 O-Ring in #8402
Retainer and assemble retainer on
shaft. Using method described in
disassembly (Lower Unit) instruct-
ions Step 12, secure bearing shaft
from rotating. Torque on #10068
Retainer Assembly to 100-120 ft.
lbs. Assemble #8373 Lip Seal.
Orient with lip side out.
STEP 12
The #10068 Retainer Assembly
is removed by using a spanner
wrench with unit still bolted into
vise. NOTE: An extension handle
on the spanner wrench may be
needed to loosen the retainer.
Remove retainer and flange,
and slide #8405 Housing from
bearing shaft.
STEP 17
Assemble #8461 Gasket. Press
on #8405 Housing. Fully pack
housing with #6143 Lubricant.
Assemble #6253 Bearing into
housing.
STEP 11
After removing bearing from gun,
insert two 5/16-18” #8408 Bolts
into shaft top. Clamp bolt heads
into a vise securely. Remove three
#8462 Bolts (or #10153-001 for
ANSI/DIN).
STEP 16
Place #8372 Lip Seal into #8400
cover as shown with Nelson name
toward ball bearing. Pack #6253
Bearing with #6143 lubricant
or equivalent. (See “Notes on
Lubrication” on the front cover.)
Press bearing into #8400 Cover.
Slide cover assembly onto bearing
shaft. CAUTION: Do not get
grease on brake surface.
2/14
#8462
#10068
#8405
#8400
#8372
#8371
#8459
#8371
#8473
#8372
#6253
#8373
#8402
#8475-001
#8401
10069 Flange Assembly
