MASSEY FERGUSON MF 14 User manual

SERVICE MANUAL
MF 14 TRACTOR WITH MOWER
This manual may be placed in the Special Products Service Manual Form No. 1448 981 M1 or in the
Technical Maintenance Manual under Group Xl.
MF
Garden
Tractor Talk
Digitally signed by Garden
Tractor Talk
DN: cn=Garden Tractor Talk,
o=GTtalk.com, ou,
[email protected], c=US
Date: 2011.12.03 11:29:34 -05'00'

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SAFETY PRECAUTIONS
When working around tractor or mower, make sure engine is shut off and key is removed from the
ignition switch.
Be careful when working around a hot engine.
Never work on electrical components unless the battery cables are disconnected.
When performing hydraulic checks, be careful not to injure yourself on the transmission cooling fan.
Be sure transmission gear shift lever is in the neutral position when performing hydraulic pressure
checks.
Do not make any adjustments with the engine running unless absolutely necessary.
Look for this symbol to point out important safety pre-
cautions. lt means - ATTENTION! BECOME ALERT!
YOUR SAFETY IS INVOLVED.
INDEX
PAGE
ENG I NE '1
Specifications
Removal
lnstallation
Complete Disassembly
Servicing of lndividual and Reassembly
Components
Fuel System
1
1
1
2
4
6
lgnition System
TRANSMISSION AND REAR AXLE
STEERING AND FRONT AXLE
8
9
16
20
21
HYDRAULIC SYSTEM
MOWER AND MOWER DRIVE (lncludes lmplement Drive Clutch)
-t-

ENGINE
SPECIFICATIONS
CylinderBore.....
obs;i dl6"
lt\-^^l-^L^tt h^l r.rJU\) -.UZU
Crankshaft Rod Journal Size
^_^-,--:_ .....1.5000"-1.4995"
crankpin Rod side crearance " " r'evvv -r'aiTvir
r\-^-r-^:_ r --_rL v'vs'|q"ve " .007"-.016"
Crankpin Length
Connecting Rod to plqnt<q1n Running Clearance
Connecting Rod to Wrist Fin Clearaice
lA, !-r ^.
WristPinto Piston Boss. ........O""f
Piston to Cylinder Bore (Thrust Face)
n:^r-- a^ A- r, :: ::':;
Piston Pin Bore Size .
n:^r^ -
piston pinDiameter... ......::.....::...:.":6;,,
l:lg :iqg clearance (Ig.p_qno Middte Rinss)
Ring End Gap .
n^-^L :::::
Valve Stem Clearance (lntake) :::::
Valve Guide in Block (lnterferen'ce) . .
Valve Seat in Block (lnterference) . .
Valve Clearance, lntake (Cold) : : :dYi, _:6lU
yiiY: :::l tlslP : " 44 u"
:x;;
Valve Seat Wid[h .037"_.045"
The following procedures are for disassembly and reassembly of the complete engine. For detailed
information regarding any component, refer to the ifpropriate nba,:ing *iffin ,,servicing of lndividual
Components" portion of this Manual.
REMOVAL 4. Disconnect starter cabte.
5. Disconnect coil wire, electric clutch
Refer to Figs. 1 and 2.
1. Remove hood and griile as an assembry. wire, f uel line, choke cable and throttle cable.
6. Remove 4 bolts securing engine to frame
2. Remove screen from flywheel and dis- and remove engine.
connect drive shaft. INSTALLATION
3. Disconnect wires from regulator rectifier P.osition .engine on frame and secure
and disconnect blue wire from thetonnect;;. - with retaining bolts.
Fig. 1 - Right-Hand Side of Engine Fig. 2 - Left-Hand Side of Engine
-'1-

2. Connect coil wire, electric clutch wire,
fuel line, choke cable and throttle cable to left
side of engine.
3. Connect starter cable and reconnect
wires to regulator rectifier.
4. Connect drive shaft and screen to fly-
wheel.
5. lnstall hood and grille assembly.
D ISASSEM BLY
1. Remove air cleaner and carburetor.
2. Remove starter, rotating screen and air
baff les.
3. Use a suitable puller and remove fly-
wheel. The use of a puller is recommended,
bumping end of crankshaft could cause damage.
4. Remove valve cover and breather.
5. Remove cylinder head.
6. Compress valve springs with a suitable
spring compressor and remove keepers. Re-
move valves and springs.
7. Remove oil base and remove connecting
rod cap.
8. Clean carbon and/or ridge from top of
cylinder wall and remove piston and rod from
cylinder block.
9. Turn engine upside down on bench.
10. Remove bearing plate with oil seal and
bearing from flywheel side of engine. lt may be
necessary to use a puller.
11. Remove retaining ring and remove bot-
tom balance gear and shim washers. Note num-
ber and location of shim washers for ease of
installation.
12. Carefully bump crankshaft on pTO end
and remove from cylinder block.
13. Remove retaining ring and remove top
balance gear and shim washers.
14. Remove the camshaft pin by driving on
end of pin opposite flywheel side. After the pin
has been driven approximately 1/2", it can be
withdrawn by hand. Note location and amount of
shims at end of camshaft for ease of installa-
tion. 15. Remove camshaft and valve lifters.
16. Remove governor arm f rom governor
shaft.
17. Unscrew governor shaft bushing nut
and remove shaft from inside of cylinder block.
'18. Remove long screw from cylinder block
and slide governor gear off stub shaft.
REASSEM BLY
1. lnspect main bearings. lf they turn easily
and noiselessly and show no evidence of scoring
on the races, there is no reason for removal. lf
the bearings are damaged, remove old bearings
and press a new one in the cylinder block and
one in the bearing plate.
2. Turn engine upside down, place thrust
washer on stub shaft and slide governor gear
into place. Secure in place with long screw
through side of block. Screw prevents governor
from sliding off during reassembly.
3. lnstall governor shaft from inside of cyl-
inder block and secure with bushing nut. Shaft
must not bind or have excessive end-play. End
clearance can be corrected by bumping bushing
in or out of cylinder block.
4. lnsert tappets into their bores. The tap-
pets are i nterchangeable.
5. Start camshaft pin into cylinder block
(from flywheel side) and through camshaft. See
Fig.3. Tap lightly on pin until it just starts into
bore at opposite end. Check end-play of cam-
shaft with a feeler gauge. Remove the pin and
add enough shim washers (opposite gear end)
to obtain .005"-.01 0" end-play.
6. Slip one .010" spacer on stub shaft and
install top balance gear on shaft (with timing
marks out). Do not install the bottom gear at this
time. lnstall another .010" spacer with one .020"
spacer and secure with retainer ring next to
thickest spacer. Proper gear end-play is .005"-
010", remove or add spacers to obtain.
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Fig. 3 - lnstalling Camshaft
-2-

7. Press crankshaft into block, align pri-
mary timing mark on balance gear with standard
timing mark on crankshaft. See Fig. 4. Press
shaft until gears are meshed approximately
1/16" then rotate crankshaft until timing marks
on cam gear align with mark on crank gear.
Continue to press crankshaft into cylinder block.
8. Rotate crankshaft until it is approximate-
ly 15' past B.D.C. then place a .010" spacer on
stub shaft and start the bottom balance gear on
shaft. Align secondary mark on gear with secon-
dary mark on crankshaft, then install gear all
the way on shaft. See Fig. 5. The secondary
timing mark on the gear will align with standard
mark on crank when gear is in place, if properly
timed. lnstall spacers with thickest one toward
retaining ring and check end-play of gear. Add
or subtract shims to obtain .005"-.010" end-play.
Fig. 5 - Installing Boltom Balance Gear
L lnstall bearing plate using one .020" and
one .010" thick gasket onto crankshaft and se-
cure to engine block with retaining capscrews.
Tighten capscrews evenly to avoid distortion
to bearing plate. Check crankshaft end-play by
measuring between inner race of bearing and
shoulder on crankshaft. Correct crankshaft end-
play is .003"-.020" and is controlled by gasket
thickness on bearing plate.
10. Use a suitable ring compressor and in-
stall piston and connecting rod. Be sure mark on
connecting rod is toward flywheel side of engine
as shown in Fig. 6. lnstall rod cap with mark
the same way. Tighten retaining bolts to 300
in.-lbs. torque.
1 1 . lnstall oil base.
12. lnstall valves, springs and retainers
and adjust tappets. Adjust exhaust tappets .017"-
.019" and intake .008"-.010" cold.
13. lnstall cylinder head and torque bolts to
360 in.-lbs. torque following sequence shown in
Fig.7.
14. Carefully install oil seals on crankshaft.
15. lnstall crankcase breather with new
gaskets in the number sequence shown in Fig. 8.
@@ @
@@
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Fig. 7 - Head Bolt Tightening Sequence
1. Stud Bolt
2. Gasket
3. Breather Plale
4. Reed
5. Ballle
6. Seal
7. Filter
8. Gaskel
9. Cover
PRIMARV
TIMt!{G
Fig. 4 - Crankshaft and Top Balance Gear Properly Timed
SECONDARY
TlMlI,IG
$ARK
MARKS ?OWARD
F],wTNEL
Fig. 6 - Connecting Rod Properly lnstalled
gECONDARY
TIMINC I.IARR
(cRAl{l{5HAF? )
SECO!II]ARY
TIMIIiIG MARK
(SATANCC CEAR}
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Fig. 8 - Grankcase Breather
-3-

16. lnstall flywheel with square key, wave
washer and nut. lnsert a bar between flywheel
fins and tighten retaining nut to 60 ft.-lbs. torque.
17. lnstall push rod and breaker points. Set
point gap to .020". This is an initial setting.
18. Place air shroud plate over carburetor
opening as shown in Fig. 9, and install carbure-
tor. 19. Connect governor arm to carburetor
linkage and adjust governor linkage.
20. lnstall air shrouds and rotating screen.
CYLINDER HEAD
Cooling fins are provided to aid in cooling.
Blocked fins often cause "hot spots" which can
result in a blown head gasket. lf gasket fails
around one of the head bolts, high temperature
can burn away portions of the aluminum alloy
head. lf no evidence of burning is found, check
head for flatness. A slightly warped head can be
surfaced by using a piece of sandpaper placed
on a flat surface. Carefully clean carbon de-
posits by using a putty knife being careful not to
scratch gasket surface.
To remove and install cylinder head proceed
as follows:
1. Remove cylinder head air baffle.
2. Remove head bolts and carefully re-
move head.
3. Clean head and check for flatness.
4. Use a new gasket and reinstall head and
air baffle. Tighten head bolts in sequence and
evenly to 360 in.-lbs. torque. See Fig. 7.
CYLINDER BLOCK
lnspect cylinder block as follows:
1. Check all gasket surfaces to make sure
they are free of gaskets, sealing material and
free of deep scratches or nicks.
2. Check cylinder bore for excessive wear,
taper or out of round. lf the cylinder taper does
not exceed .005", or .004" out of round, de-
glaze cylinder walls and install a service ring kit.
NOTE: lf gauges are not available for check-
ing cylinder wear, a simple and quite ac-
curate method is as follows:
1. Use top of piston and push a piston ring
to bottom of cylinder bore.
2. Measure ring end gap.
3. Move the same ring to top of ring travel
in cylinder bore and again measure ring
SERVICING OF INDIVIDUAL COMPONENTS
end gap.
4. Take the diflerence between the two
measurements and divide by 3. This is
approximately the cylinder taper.
For Example: With bottom ring gap ol .014"
and .035" top gap, the diflerence is .021".
Divide .021" by 3, the result is .007". This
represents the approximate cylinder taper.
3. lf cylinder bore is excessively worn, it
can be rebored to .010"-.020" or .030" oversize.
Reboring to one of these sizes will allow usage of
oversize piston and ring assemblies.
PISTON, RINGS AND ROD
Production type and service type rings are
available in standard, .010", .020" and .030"
oversize. Production type is used only when cyl-
inder is not worn while service type is used when
cylinder is worn but within wear limits (.005"
taper - .004" out of round). Cylinder bore must
be deglazed when service rings are used. To in-
stall new rings, proceed as follows:
1. Remove piston and rod and remove rings
from piston.
2. Clean ring grooves.
3. Place each ring in cylinder bore and
check end clearance. Ring end gap should be
.010"-.020".
4. lnstall rings on piston according to mark-
ings on the ring. lf a groove or bevel is on the
inside of the ring, it must be toward the top of
piston. When a groove is on the outside of the
ring, it must face down on piston.
5. Use a ring compressor and install piston
and rings into cylinder bore.
Connecting rods are available in .002" un-
dersize to be used where the crankshaft has a
slight wear. Rods are also available in .010" and
.020" undersize for use with reground cranks.
-4-
Fig. 9 - Plate lnstalled Prior to lnstalling Carburetor

lnstall connecting rod in engine with notch
on rod and cap toward flywheel side of engine
as shown in Fig. 6. Tighten retaining bolts to 300
in.-lbs. torque.
CRANKSHAFT AND BALANCE GEARS
Two balance gears are driven off the crank-
shaft gear in the direction opposite to crankshaft
rotation. The two gears run on needle bearings
on stub shafts.
When the crankshaft is reinstalled, care
must be exercised to make sure that the gears
are properly timed to the crankshaft. See Figs.
10and'11.
Fig. 10 - Engine Balance System Components
.003" to .020" end-play of crankshaft.
CAMSHAFT
The camshaft contains an automatic com-
pression release which raises the exhaust valve
slightly during cranking and aids in starting. Fly-
weight action disengages this release after a
speed of 650 rpm is reached. The camshaft ro-
tates on a pin which is held securely in the
engine block. Shims must be used to obtain an
end-play of .005"-.01 0".
VALVES, SEATS, SPRINGS AND
GU IDES
To replace valve guide, drive down and
carefully break off protruding end until guide can
be removed. Press new guide into block until
upper end of guide is 1-15/32" from top of cyl-
inder block.
Check rotator caps to be sure they will ro-
tate before installing valves and retainers.
Valve seat inserts are available for both
valves. When servicing the valve seats the seat-
ing surfaces should be held as close as possible
to 1/32" wide. The seats should never be more
than 1/16" wide. Both seats should be ground
to a 45' angle. After the valves and seats are
refaced, they should be lapped in with a fine
grade of valve grinding compound. After valves
are installed, adjust tappet clearance to - in-
take .008"-.010" and exhaust .01 7"-.019".
GOVERNOR
The governor is a mechanical type with
centrifugal flyweights and is mounted within the
crankcase and driven off the camshaft gear.
Engine governed speed is variable as de-
termined by the throttle control lever.
Before servicing the governor gear assem-
bly, the crankshaft, balance gears and camshaft
will have to be removed. Governor linkage is
adjusted at the factory and further adjustment
should not be necessary unless the linkage has
been disturbed. Readjustment may be indicated
if engine speed surges with change of load or if
speed drops considerably when a load is applied.
To adjust governor linkage, stop engine,
ref er to Fig. 12, and proceed as follows:
'1. Loosen clamp nut holding governor arm
to cross shaft.
2. Rotate cross shaft counterclockwise as
far as possible.
3. Pull governor arm all the way away from
carburetor and retighten clamp nut.
Normal location of spring is third hole in
governor arm and second hole in control arm as
shown in Fig. 12. Also refer to Fig. 9.
Fig. 11 - Timing Marks Used lor lnstallation
The crankshaft and gear are of one piece.
lf gear is worn or damaged the crankshaft should
be replaced. lf crankpin is slightly scored it can
be cleaned up by using crocus cloth soaked in
oil, then use a .002" undersize rod. lf scored
more than .002" it should be reground to .0.10"
or .020" or replaced.
BEARING PLATE
The bearing plate contains one crankshaft
bearing and oil seal. lt is retained to the cylinder
block with 4 capscrews and is sealed with shim
gaskets. The gaskets control crankshaft end-
play. Remove or add shim gaskets to obtain
PRIMARY
TIMING MARK
(BALANCE GEAR)
STANDARD
TIMING MARK
(CRANKST]AFT )
SECONDARY
TIMING MARK
(BALANCE GEAR) SECONDARY
TIMING MARK
(cRANKSHAFT)
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HIGH SPESD
MlX?UR8
SCREW
Fig. 13 - Carburetor Adjustment Screws
Fig. 12 - Adjusling Governor Linkage
Maximum power and efficiency are possible
only with proper carburetion. lmproper carbure-
tor adjustments can cause overheating, spark
plug fouling, excessive valve wear and lack of
power. lf any of these problems occur, check
carburetor for adjustments and overhaul if nec-
essary.
CARBU RETOR ADJUSTM ENTS
Refer to Fig. 13.
1. Stop engine and carefully turn both fuel
mixture adjustment screws in until they bottom
(do not force).
2. Turn high speed mixture screw out 2
turns and turn idle mixture screw out 1-1/4
turns. This is an initial setting.
3. With engine running at full throttle, (do
not exceed 3600 rpm), adjust high speed mix-
ture screw in until engine starts to slow down.
Then turn screw out slowly until engine regains
full speed. lf adjusted properly, engine should
acCelerate smoothly and operate at a steady
governor speed. lf it doesn't, open adjustment
screw slightly.
NOTE: lf necessary, adjust throltle control
linkage to obtain 3600 rpm.
4. Operate engine at about 1000 rpm and
turn idle mixture screw in until engine slows
down (runs rough) then open screw until engine
runs smooth.
NOTE: ll these adjustments do not correct
the carburetion problem, the carburetor
should be removed and overhauled.
CARBU RETOR D ISASSEM BLY
1. Remove carburetor from engine and
wash clean in solvent.
2. Remove retaining nut, gasket and bowl.
3. Remove float pin, float, needle and
needle seat.
4. Remove idle mixture screw and high
speed mixture screw.
5. Remove high speed mixture screw seat.
NOTE: ll choke, throttle plates or shalts
are worn, replace the complete carburetor.
lnspect all parts for wear or damage, re-
place as required. Clean all parts in an alcohol
or acetone solvent and blow out with compressed
air.
FUEL SYSTEM
-6-

CARBURETOR REASSEMBLY
See Fig. 14.
1. lnstall needle seat with gasket. lnstall
needle, float and float pin.
2. lnvert carburetor and adjust float level,
by bending tang on float, until an 11/64" drill
bit just fits between float and gasket surface on
carburetor, as shown in Fig. 15.
3. Remove float and needle and install high
speed needle screw seat.
4. lnstall new bowl gaskets, needle and
f loat.5. lnstall bowl and secure with retaining
nut and gasket.
6. lnstall high speed mixture screw. Turn
in until needle contacts seat then turn out 2
tu rns.
7. lnstall idle mixture screw. Turn in until
needle contacts seat then turn out 1-1/4 turns.
B. lnstall carburetor on engine and adjust
as outlined under the heading "Carburetor Ad-
justments".
Fig. 14 - Carburetor - ldentification ol Parls
FUEL PUMP
The fuel pump operates off a cam on the
camshaft. A lever transmits action to a dia-
phragm within the pump body.
Fig. 15 - Ghecking Float Level
DISASSEMBLY AND REASSEM BLY
Refer to Fig. 16.
'1. Remove fuel lines and mounting screws
holding pump to engine.
2. With a file, make an indicating mark
across a point at the union of fuel pump body
and cover. This is a positive marking to assure
proper reassembly. Remove assembly screws
and remove cover.
3. Turn cover over and remove valve plate
screw and washer. Remove valve retainer,
valves, valve springs and valve gaskel, noting
their position. Discard valve springs, valves and
valve retainer gasket.
4. Clean fuel head thoroughly with solvent
and a fine wire brush.
5. Holding pump cover with diaphragm
surface up, place new valve gasket into the
cavity. Now assemble the valve spring and valves
into the cavity and reassemble valve retainer and
lock in position by inserting and tightening fuel
pump valve retainer screw.
6. Place pump cover assembly in a clean
place and rebuild the lower diaphragm section.
7. Holding mounting bracket, press down
on the diaphragm to compress spring under it,
then turn bracket 90" to unhook diaphragm so it
can be removed.
B. Clean mounting bracket with a solvent
and a fine wire brush.
9. Replace the diaphragm operating spring,
stand new spring in casting, position diaphragm
and press down on diaphragm to compress
spring and turn 90'to reconnect diaphragm.
10. Hold mounting bracket, then place the
pump cover on it (make sure that indicating
marks are in line) and insert the four screws.
DO NOT TIGHTEN. With the hand on the mount-
ing bracket only, push the pump lever to the limit
of its travel and hold in this position while tighten-
ing the four screws. This is important to prevent
stretching the diaphragm.
11. Mount the fuel pump on engine, using
the new mounting gaskets. Connect the fuel
lines.
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Fig. 16 - Fuel Pump - ldenlilication of Parts Fig. 17 - lgnilion Timing Using A Gontinuity Light
1. Screw 5. Spring
2. Pump Cover 6, Valve Relainer
3. Gasket 7. Screw
4. Valve 8. Oiaphragm
9. Spring
10. Gasket
11. Pump Body
IGNITION SYSTEM
When checking the ignition system, start
with the components that require most frequent
servicing. Hard starting, low power and erratic
operation are often caused by faulty ignition.
Spark plug, ignition coil, points and condenser
must be in good condition and the spark must
occur at the proper time to maintain good per-
formance. A simple test will help determine if
the ignition is at fault.
QUICK IGNITION CHECK
Remove high tension wire from spark plug.
Turn engine in direction of rotation while holding
wire approximately 1/8" away from cylinder
block. lf a sharp, snappy spark jumps this dis-
tance, you may assume the ignition system is
functioning satisfactorily. Try a new spark plug.
lf spark does not occur, check the ignition com-
ponents and wiring.
BREAKER POINTS AND CONDENSER
Point condition and adjustment of gap will
affect engine operation. lf the points are burned
or badly oxidized, little or no current will flow
through the ignition system. Breaker point gap
will also affect ignition timing.
To install points proceed as follows:
1. Be sure push rod is in place and secure
points in place with retaining screws. Replace
condenser when points are replaced.
2. Connect wire to points and rotate fly-
wheel until points fully open.
3. Adjust point gap to .020".
4. Attach continuity test light to breaker
point wire and to ground as shown in Fig. 17.
5. Rotate engine slowly in direction of ro-
tation until light just goes out. At this point, S
mark on flywheel should align with mark on
bearing plate. lf the marks do not align readjust
points. Point gap will vary from .019"-.022".
IGNITION COIL
The ignition coil requires very litile servicing
except being kept clean and all terminals tight.
The coil must be hooked up properly. The
negative (-) coil terminal must be connected
to the breaker points.
IGNITION TIMING
The engine has a hole in the flywheel hous-
ing so that the timing marks can be observed.
Two timing marks are stamped on the flywheel
- the f mark indicates T.D.C. and the S mark
indicates the spark point which is 20. B.T.D.C.
-8-
I-