Filter
Top Products
60
Hydraulic
System
Tractors,
Lawn
and
Garden
-
110
and
112
15-2
Pump
SM-2059-
(Apr-57)
GENERAL
INFORMATION-Continued
with
the
"V"
down.
The
protector
gasket
and
backup
gasket
fit
on
the
top
of
the
diaphragm
seal
being
the
same
general
pattern
as
the
seal.
The
purpose
of
these
gaskets
is
to
prevent
ex-
trusion
of
the
seal
into
the
space
between
the
diaphragm
and
the
front
plat
e .
When
the
pump
is
in
operation,
oil
from
the
pressure
p
or
t
is
forced
w1der
the
diaphragm
seal
and
is
distributed
by
the
interconnecting"
V"-
groove
in
the
seal.
This
oil
pressure
forces
the
gaskets
against
the
wear
plate,
thus
dividing
the
area
under
the
wear
plate
into
pie
shaped
seal
compartments.
A
small
hole
1s
drilled
through
the
diaphr
agm
into
each
compartment.
These
connect
th
e
small
chambers
formed
by
the
gear
teeth
to
the
com
-
partments
under
the
wear
plate.
Becaus
e of
the
location
of
these
holes,
the
pressure
under
the
diaphragm
is
slightly
hi
g
her
than
the
con'es-
ponding
secti
on
in
the
gear
chamber.
Conse-
quently,
the
diaphragm
is
always
kept
in
close
contact
with
the
gear
ends,
compensating
for
de-
flection
from
pressure,
thermal
expansion
or
wear.
This
greatly
incre
a
ses
pump
efficiency.
REPAIR
1 -
Fronl
Plale
2 -
Steel
Boll
(2
used
)
3 -
Check
Spring
(2
used
)
4 -
Cap
Screw
(2
used)
5 -
Diaphragm
Seal
6 -
Proteclor
Gaske
t
7 -
Backup
Gasket
8 -
Diaphragm
9 - Key
10
-
Drive
Shaft
and
Gear
11
-
Idler
Shaft
and
Gear
12
-
Body
and
Dowel
13
-
Dowel
(2
used
)
14 -
Bock
Plate
Assembly
15
-
Relief
Valve
Seat
16
-
Steel
Ball
17 -
18
-
19
-
20
-
21
-
22
-
23 -
24
-
25
-
26 -
27 -
28 -
29
-
30 -
31
-
32
-
Relief
Valve
Adapte
r
Relief
Valve
Spring
Relief
Valve
Shim
O-Ring
He,_
Hd.
Plug
Filt",
Replacement
Kit
Aluminum
Washers
(4
used)
Filter
Gasket
12-Point
Cap
Screws
(4
u
sed)
Internal
Toolh
Washer
(6
used)
Machine
Screw
(6
used
)
Filter
O-Rin g
Filler
Plug
Reser
voir
Drive
Shaft
Seal
F
ig.
3-Explodcd
Vicw
of
Hydraul
ic
Pump
and
Rc.ervoir
Lit
ho
1n
U. S. A.