Eskridge, Inc. Olathe, Ks. 913-782-1238 www.eskridgeinc.
com
Model 312 spindle-shaft service manual, SM312S2
-AA
Page 5
4)
If equipped with metal-face-type seal
(16D)
, the adapter
(16F)
with o-ring seal
(16E)
may be left on if this was not leaking.
If you suspect leaks of this component, remove the adapter
(16F)
by using a thin chisel to begin moving it up from the seat-
ed position and remove as it clears the seal diameter boss of
the shaft
(2)
. Remove and replace the o-ring
(16E)
. Re-install
the adapter (16F) with lubricated o-ring
(16E)
in place.
6)
Lubricate inner lip of new shaft se
al
(16A)
(if equipped) and
slide it onto the shaft
(2)
until it fits snugly over the shaft seal
diameter with the open side toward the insi
de of the gear drive.
If equipped with metal-face-type seal
(16D)
, insert each half
of the seal in its respective cavity with lapped metal face fac-
ing the proper direction (lapped metal faces are to be touching
each other for proper operation).
Note: Press bearing cone onto output shaft by pressing on in-
ner race only. DO NOT press on roller cage, as it will damage
bearing.
6)
Inspect inner and outer bearing cups
(20D & 20B)
. If
cups are
damaged, drive them out using a brass drift and press new
cups into place using an acceptable press tool that will not
damage the cups
(20B, 20D)
.
Base Reassembly
1)
Clean all foreign material from any magnetic oil plug
(30B)
lo-
cated on base
(1)
.
2) Place
spindle-shaft
(2)
spline-end up on work table. Using a
press tool that presses only on the cone race, press outer bear-
ing cone
(20A)
onto shaft
(2)
until it seats against the shoulder.
3) Place
b
ase
(1)
exterio
r side up on work table.
4)
Apply a layer of lithium or general purpose bearing grease to
the roller contact surface of o
uter bearing cup
(20B
)
. Install the
rubber dirt boot
(16C)
onto base if equipped.
5)
Place the shaft
(2)
with lip-seal
(16A)
if equipped and bearing
cone
(20A)
on press work table (spline pointing up). Apply a
thin layer of purple Loctite (545) or equivalent on OD of lip-seal
(16A)
if equipped.
6) Place the base
(1)
with the metal-face-type seal
(16D)
if
equipped over the sha
ft
(2)
with the bearing
(20A)
and seal
(16A)
or
(16D, 16E, 16F)
. Use 4-5 spacers between the spin-
dle flange and lip seal
(16A)
to force the seal into the bore of
the base
(1)
. Press on the base
(1)
to install the lip seal
(16A)
.
7) Apply lithium or general purpose bearing grease to roll-
er contact surface of the inner cu
p
(20D)
then press
inner bearing cone
(20C)
onto shaft
(2)
until it seats against
inner bearing cup
(20D)
.
8)
T
he bearing preload should be adjusted to
achieve rolling torque in the range of between
100 to 400 in-lb. The bearing preload should be
tailored to your application; a low-speed application may
require a high pre-load, while high-speed applications
usually requires low pre-load. Adding shims
(35A)
will in-
crease the pre-load on the bearing set. Determine your
pre-load requirement and install shims
(35A)
to obtain
this pre-load.
Install the Load-N-Lock™ segments
(35B)
over the shims
(35A)
and into the groove in the shaft
(2)
. Finally, install the
lock ring
(35C)
over the segments
(35B)
.
All subassembly service or repairs should be complete at
this time. Continue to Unit Assembly to complete unit build-
up.
Unit Reassembly
1) Install
t
he secondary carrier
(5)
assembly onto the output
shaft
(2)
; align the splines of the carrier
(5A)
with the out-
put shaft
(2)
splines and slide the carrier onto the shaft.
2) Lubricate
o-ring
(16B)
and install on the external pilot of
the secondary ring gear
(12B)
.
Caution: Hold ring gear(s) by outside diameter or use lifting
device to prevent injury.
3)
Align gear teeth of secondary ring gear
(12B)
with the gear
teeth of the planet gears
(5B)
and then align bolt holes
(also use the scribe-mark made during disassembly).
4) Lubricate
o-ring
(16B)
and install on the external pilot of
the primary ring gear
(12A)
.
5)
Install the sun gear
(6)
into the mesh of the secondary car-
rier assembly
(5)
and install the thrust washer
(14B)
.
6)
Align the planet gear
(7B)
teeth with the teeth of the prima-
ry ring gear
(12A)
and install the carrier, aligning the spline
teeth of the carrier with the splines of the sun gear
(6)
.
7)
Install the thrust washer (14B) onto the primary carrier as-
sembly
(7)
.
8)
Install the input gear
(
4
)
.
6)
Install the thrust washer
(
14A
)
.
Refer to exploded view for
details..
7)
Noting the scribed line made during disassembly, (with lu-
bricated o-ring
(16B)
in place) align and install the cover
(
3)
.
8)
Install and torque the twenty 5/8-11 hex-head cap-
screws
(25A)
with lockwashers
(25G)
. The torque for the
cap-screws:
220 ft-lb dry, 170 f
t-lb if the fasteners are
lubricated
.
9)
Using a splin
ed shaft to drive the input gear
(4)
ensure that
the unit spins freely.
10) Install all plugs
(30A, 30B, 30C)
. Fill the unit to the prop-
er level, as specified, with recommended gear oil (refer to
chart, page 3) after unit is sealed with brake and/or motor.
The gearbox is now ready to use.
