Oil Seal Installation - Bolens QS Series Service Manual

DRIVE TRAIN (Continued)
QS, QT
&
1900 SERIES
Page 3-25 REV. 12/78
OIL SEAL INSTALLATION
OIL SEAL INSTALLATION
1. Be sure housing bore diameter,
bore depth and shaft diameter
are correct and within the re-
commended tolerances. In-
spect all surfaces for scratches
or nicks.
2.
Prov1de rad1us or chamfer at
housing bore entrance.
3. Be sure sealing lip has not
been damaged.
4
Lubncate sealing lip(s) With
any l1ght machine oil before
installing.
5. Apply a l1ght coat of any suit-
able Sealing Compound to 0.0.
of seal to provide a margin of
safety against seepage through
the pressf1t in housing bore.
Extreme care must be taken to
avoid depositing any com-
pound on the sealing number.
6. Install seal with lip facing
medium to be sealed. (The ·
reverse is used on!y when
it becomes more important to
exclude a medium than to
retain 1t.)
7. When possible, chamfer end
of shaft over which seal must
pass; otherwise use a sleeve as
illustrated at "A" or "B" in
Figure 3-60.
8. Press seal into housing with
smooth uniform pressure ap-
plied by means of a pressfit-
ting tooL See "C" in Figure
3-60. If shaft is already in
place. use a sleeve-type
pressfitting tooL
9. Whenever possible, use an
arbor press to insert seal into
housing. Be sure seal is not
cocked when applying pres-
sure. It is desirable to seat seal
against a shoulder in the bore
to help prevent cocking.
10.
When shaft is assembled from
reverse side of sealing lip, no
spec1al precautions are re-
qUired other than removing all
burrs and sharp corners from
shaft. When the shaft enters
against the sealing lip, a
tapered sleeve must be used
made to the dimensions shown
at "A" in Figure 3-60. When
seal must pass splines, key-
ways or holes use a sleeve as
shown at "B" in Figure 3-60.
If the use of an assembly
sleeve is not possible, the edges
of the spline, keyway or holes
should be rounded and lubri-
cated with a heavy grease.
11. In cases where the completed
machine is painted where seal
is exposed, mask area to pre-
vent paint being deposited on
shalt and sealing lip. If paint
is baked on, be sure temper-
&
ature does not exceed oper-
ating temperature of seal to ·
avoid injury to the sealing
member.
/-LL-4
/HOUSING
RADIUS
MOUNTING
stEEn
fOI USE WITH SKAFfS
HAYING SPLINES, KEYWAYS Ol HOLES
SLEEVES
NOTES:
(11 Sl . . ,.• wall ohauld bo 01 thil'l 01 poniblo (ftOI MOl• !loan
.O.W" to.,.ond okoft).
(21
l11brical1
bo!h ,, .... and oholl "lott u1in11.
DRIVING TOOLS
FIGURE 3-41