MASSEY FERGUSON MF 14 - Page 41

MASSEY-FERG USON
GROUP
O
-
SECTION V
-
PART 2
IROUBI.E-SHOOT'NG
r\IR
OPERATED
VALVE
APPLY
AIn
TOOL
INSEI1TED
INTO
IIOSE
TO BND
SPARI{
PLUG
IIOLE
OT
ITITTING
PISTON
AT
T.D.C.
ON
COMPRESSION
STROKE
1.
CARBURETOR
2.
MUFFLER
3.
OIL FILL HOLE
4.
HEAD GASKET
SCREW
INTO
SPARK PLUG
ABOUT
60
LBS.
AIIT
PRESSURE
HOLE
AIR
HOSE
CONNECTOR
SI'{APS
OVER ADAPTER
COMPRESSION
GAUGE
\*
SPARK
PLUG
REi{OVED
FF.ST TEST:
WITHOUT
OiL
IN
CYLL\DER
SECOND TEST: SQUBT A
FEw
DROPS
OF OiL
ONTO PISTON THROUGH
SPARK
PLUG HOLE.
TURN
ENGINE
OVER
6
TO 8 REVOLUTIONS
Fis.
I
solution
will
pinpoint
the
quickly.
COA4PRESS'ON IESI fiIETHOD
Use
a
standard compression
gauge
and
insert
into
the
spark
plug
hole.
Crank over engine six
to
eight revolutions.
The
minimum
gauge
reading
should be 60
pounds
or
more.
Fis. 2
NOTE:
Cat,btn'eto't'
tltyottle
ntust
be
fully
open
ruhen rnaking
contpression
tests.
If
reading
is low,
squirt
a
few drops
of oil
into the cylinder
and retest the
compression.
The oil will temporarily
seal leakage
around
the rings if
leakage is
occuring at
this
point.
If
this test
shows
a
high
compression
reading,
all
indications
point
to
ring
wear or damage. If
little
or
no difference
in reading
results,
the
leak is either
in the
valves,
head
or
some other
area.
leak holes
more
Prinred
in
u.s.A