Filter
Top Products
60
Hydraulic
System
Tractors,
Lawn
and
Garden
-
110
and
112
5-6
General
Information
SM-2059-
(Apr-57)
DIAGNOSING
MALFUNCTIONS
PUMP,
VALVE
AND
RESERVOIR
Noisy
Pnmp
Caused
by
Cavitatiun
Fluid
low
in
reservoir.
Check
level
and
fill
r e
servoir
to
proper
level,
page
5-3.
Oil
too
heavy.
Drain
system
and
fill
with
oil
of
proper
viscosity,
page
5-3.
Oil
filter
in
reservoir
plugged.
Drain
system,
clean
filter
and
fill
with
new
fluid,
page
5-
3.
Oil
in
System
Gets
Hot
Fluid
low
in
res
e
rvoir.
Check
level
and
fill
reservoir
to
proper
level,
page
5-3.
Contaminated
oil.
Drain
oil
and
refill
with
new
fluid
of
pro-
per
viscosity,
page
5-3.
Relief
valve
setting
too
high
or
too
low.
Check
pressure,
page
15-
8.
Add
or
remove
shims
as
required
to
ob-
tain
correct
pressure.
Oil
viscosity
too
high
or
too
low.
Drain
system
and
fill
with
proper
vis-
cosity
fluid,
page
5-3.
Hoses
restricted
(crimped
or
pinched).
Route
lines
properly
to
prevent
restric-
tion.
Leaks
Torque
screws.
Apply
"Copper
Coat"
or
equivalent
to
milled
surfaces
if
necessary.
Pump
Shaft
Seal
Leaking
Worn
shaft
seal.
Replace
seal.
Broken
diaphragm
seal
or
backup
gasket.
Check
condition
of
diaphragm
and
gasket.
Replace
parts
as
necessary.
Bearing
out
of
position.
Check
bearing
position
and
condition,
page
15-4.
Replace
front
plate
if
necessary.
Litho
in
U.S.A.
Excessive
internal
wear.
Disassemble
unit
and
check
for
internal
wear.
Replace
parts
as
necessary.
Foaming
Oil
Fluid
low in
reservoir
.
Check
level
and
fill
reservoir
to
proper
leve
1,
page
5-
3.
Oil
viscosity
too
light
or
too
hea
vy -
wrong
oil.
Drain
system
and
fill
with
non-foaming
oil
of
proper
viscosity,
page
5-
3.
Low
System
Pressure
Fluid
low in
reservoir.
Check
level
and
fill
reservoir
to
proper
level,
page
5-
3.
Loose,
worn
or
damaged
drive
belt.
Check
condition
of
belt.
Tighten
belt
to
proper
tension,
page
15-8.
Replace
belt
if
necessary.
Weak
relief
valve
spring
or
worn
adaptor.
Check
condition
of
parts.
Replace
parts
as
necessary.
Add
shims
if
necessary.
Loose
drive
sheave
(key
missing).
Install
key
and
tighten
sheave
nut
firmly.
Loose
relief
valve
seat.
Install
seat
to
proper
depth.
See
specifications,
page
15-10.
External
Leakage
Loose
screws.
Tighten
screws.
Disassemble
pump
and
apply
"Copper
Coat"
or
equivalent
to
milled
surfaces
if
necessary.
Damaged
O-rings.
Replace
O-rings
between
valve
and
back
plate.
Valve
spool
worn
or
damaged.
Check
valve
assembly.
Replace
valve
assembly
if
necessary.