SERIES 454-464-484-574-584-674 Paragraphs 51-53

Fig. 28—011 pressure regu-lator valve is located in oilgallery at left rear side of

engine.

DIESEL ENGINEAND COMPONENTS

Modeis 454, 464 and 484 diesel trac-tors are equipped with a three cyiinderengine, having a bore and stroke of3.875 X 5.06 Inches and a dispiacementof 179 cubic Inches.

Modeis 574 and 674 diesel tractors areequipped with a four cylinder engine,having a bore and stroke of 3.875 x 5.06inches and a displacement of 239 cubicInches.

Modei 584 dlesei tractors are equippedwith a four cylinder engine, having abore and stroke of 3.875 x 4.38 inchesand a dispiacement of 206 cubic inches.

R&R ENGINE ASSEMBLY

All Models

51. To remove the engine assembly,first remove hood and rear side panels,drain cooling system and disconnectbattery ground cable. Disconnect wiresto alternator and wire to headlights.Disconnect steering lines and oil coolerlines and plug openings to prevent dirtfrom entering the system. Disconnectair cleaner scoop and radiator hoses.Support tractor under clutch housing,attach hoist to front support, then un-bolt and remove front support, radia-tor, axle and wheels as an assembly.Shut off fuel and disconnect the inletline at fOter base and the return line atthe tee. Disconnect the fuel shut offcable at the injection pump and thewire to the ether injector. Disconnectelectrical wires from engine, unclipharness and lay rearward. Remove thebreather tube assembly from right sideof engine. Disconnect temperaturesensing bulb and oil pressure tube fromengine, then disconnect throttle rodand tachometer cable. Attach hoist toengine, then unbolt and remove engineassembly.

When reinstalling engine assemblyunbolt and remove clutch assembly andposition it on transmission input shaft.Disconnect the linkage from clutch re-lease shaft. Clutch can be bolted to fly-wheel after engine is installed byworking through the opening at bottomof clutch housing.

NOTE: if fiywheei and ciutch piatebalancing marks are indicated (dab ofwhite paint), they must be aiigned.

CYLINDER HEAD

All Models

52. REMOVE AND REINSTALL.Drain coolant, remove hood and discon-nect battery cable. Unbolt and removeair cleaner. Disconnect upper radiatorhose and by-pass hose and removecoolant temperature bulb from engine.Disconnect injector lines from fuel in-jectors and injection pump. Cap or plugall fuel connections immediately afterthey are disconnected to prevent en-

13O

O12

O9

8O

1o

o4

O5

6O

3O

o2

O7

TOO

11o

o14

Fig. 29—Models 454, 494 and 484 cylinderhead cap screws are tightened In the se-

quence shown. Refer to text:

18O .

15

14

^—^

011

10

^o^

6O

"'—^

0 2

4

y—^

*̂ ^

05

9

120

/^—^

o13

17

trance of dirt or other foreign material.Unbolt and remove exhaust manifoldand water collecting tube from rightside and inlet manifold from left side ofcylinder head. Remove rocker armcover, rocker arms and shaft assemblyand push rods. Remove cylinder headcap screws and lift off cylinder head.

CAUTION: The injector nozzle assem-blies protrude slightly through the com-bustion side of cylinder head. Be ex-tremeiy carefui when removing or rein-staiiing cylinder head with injectors in-staiied not to damage injector ends. DONOT place cylinder head on bench withcombustion side down.

When reinstalling cylinder head, usenew head gasket and make certain gas-ket sealing surfaces are clean. Useguide studs when installing cylinderhead.

Tighten cylinder head retaining capscrews in three steps using the se-quence shown in Fig. 29 for the threecylinder engine and Fig. 30 for the fourcylinder engine. Tighten the cap screwsto a torque of 30 ft.-lbs. in first step, 60ft.-lbs. in second step and 90 ft.-lbs. inthird step. Adjust valve tappet gap to0.010 inch (intake) and 0.012 inch (ex-haust) as outlined in paragraph 54.

NOZZLE SLEEVES

All Models

53. The cylinder is fitted with brassinjector nozzle sleeves which passthrough the coolant passages. Thenozzle sleeves are available as serviceitems.

Adopter OTC-12M

17/16 X 14 NO

Fig. 30—Models 574, 674 and 584 cylinderhead cap screws are tightened In the se-

quence shown. Refer to text.Fig. 31—Use iH tooi No. FES 112-4 and slide

hammer to remove inlector nozzle sleeves.

17-

Paragraphs 54-55

To renew the nozzle sleeves, removecylinder head as outlined in paragraph52, then remove injectors. Use specialbolt (IH tool No. FES 1124) and turn itinto sleeve. Attach a slide hammerpuller and remove nozzle sleeve. SeeFig. 31. Use caution during this opera-tion not to damage the sealing areas inthe cylinder head.

NOTE: Under no circumstances shouldscrew drivers, chisels or other suchtools be used In an attempt to removeInjector nozzle sleeves.

When installing nozzle sleeves, besure the sealing areas are completelyclean and free of scratches. Apply alight coat of "Loctite Grade B" on seal-ing surfaces of nozzle sleeves, thenusing installing tool (IH tool No. FES112-3) shown in Fig. 32, drive nozzlesleeves into their bores until theybottom as shown in Fig. 33.

NOTE: Injector nozzle sleeves have aslight interference fit In their bores.When installing sleeves, make certainsleeve is driven straight with its bore.

VALVES AND SEATS

All Models

54. Inlet and exhaust valves are notinterchangeable. The inlet valves seatdirectly in the cylinder head and theexhaust valves seat on renewable seatinserts. Inserts are available in over-sizes of 0.004 and 0.016 inch.

Valve face and seat angle for boththe inlet and exhaust is 45 degrees.Valve rotators and valve stem seals areused on all valves.

When removing valve seat inserts,use the proper puller. Do not attemptto drive chisel under insert or counter-bore will be damaged. Chill new insertswith dry ice or liquid Freon prior toinstalling. When new insert is properlybottomed, it should be 0.008-0.030 inchbelow edge of counterbore. After in-stallation, peen the cylinder headmaterial around the complete outer cir-cumference of the valve seat insert.

INTERNATIONAL HARVESTER

FESNozzle sfeeve

I toot

Coot fiere wttft Loctite

Check the valves and seats againstthe following specifications:InletFace and seat angle 45°Stem diameter 0.3919-0.3923 in.Stem to guide diametral

clearance 0.0014-0.0026 in.Seat width 0.076-0.080 in.Valve run-out (max.) 0.001 in.Valve tappet gap (warm) 0.010 in.Valve recession from face of

cylinder head,Normal 0.039-0.055 in.Maximum 0.120 in.

ExhaustFace and seat angle 45°Stem diameter 0.3911^.3915 in.Stem to guide diametral

clearance. 0.0022-0.0034Seat width 0.081-0.089 in.Valve run-out (max.) 0.001 in.Valve tappet gap (warm) 0.012 in.Valve recession from face of

cylinder head.Normal 0.047-0.063 in.Maximum 0.120 in.To adjust valve tappet gap on D179

engine, crank engine to position num-ber one piston at top dead center ofcompression stroke. Adjust the fourvalves indicated on the chart shown inFig. 34. Turn engine crankshaft onecomplete revolution to position number

one piston at top dead center of ex-haust stroke and adjust the remainingtwo valves indicated on chart.

To adjust valve tappet gap on D206and D239 engines, crank engine to posi-tion number one piston at top deadcenter of compression stroke. Adjustthe four valves indicated on the chartshown in Fig. 35. Turn engine crank-shaft one (iomplete revolution to posi-tion number four piston at top deadcenter compression stroke and adjustthe remaining four valves indicated onchart.

VALVE GUIDES AND SPRINGS

All Models

55. The inlet and exhaust valveguides are interchangeable. Inlet andexhaust guides should be pressed intocylinder head until top of guides are1.154-1.169 inches above spring recessin the head. Guides must be reamed tosize after jistallation. Inside diameterof guides should be 0.3937-0.3945 inchand valve stem to guide diametralclearance should be 0.0014-0.0026 inchfor inlet ard 0.0022-0.0034 inch for ex-haust valves.

Inlet and exhaust valve springs are

Fig. 3$" Drive nozzlesleeves into cylinfter head

until they bottom.

Fig. 34~Chart showsvalve tappet gap adiustingprocedure used on Models454, 464 and 434 three cyl-

inder engines.WITH

No. 1 Piston at T.D.C. (Compression)No. 1 Piston at T.D.C. (Exhaust)

ADJUST VALVIS (IngtfM Worm) *

1 23

4 56

Fig. 3S—Chart showsvalve tappet gap adiustingprocedure used on Models574, 674 and 584 four cyl-

inder engines.

No. 1 Piston at T.D.C. (CcmipressKin)

No. 4 Piston at T.O.C. (Compression)

ADJUST VAIVIS (Incin* Warm)

1 23

4 56 7 8

1 2 3 4 5

Fig. 32—ltoot. Apply "Grade B Loctite" to seating sur-

face of nozzle sleeve.

-Front

Numboring sequ«nc« ol volv«t wKich corr«ifK>nd to chart

18

SERIES 454-464-484-574-584-674 Paragraphs 56-61

also interchangeable. Springs shouldhave a free length of 2.173-2.181 inchesand should test 140-160 pounds whencompressed to a length of 1.346 inches.Renew any spring which is rusted, dis-colored or does not meet the pressuretest specifications.

VALVE TAPPETS(CAM FOLLOWERS)

All Models

S6. The 0.7862-0.7868 inch diametermushroom type tappets operate direct-ly in the unbushed crankcase bores.Clearance of tappets in the boresshould be 0.0005-0.0024 inch. Tappetscan be removed after first removingthe camshaft as outlined in paragraph65. Oversize tappets are not available.

VALVE LEVERS(Rocker Arms)

All Models

57. Removal of the rocker arms andshaft assembly is conventional. To re-move the rocker arms from the shaft,remove bracket clamp bolts and slideall parts from shaft. Outside diameterof rocker shaft is 0.8491-0.8501 inch.The renewable bushing in rocker armsshould have an operating clearance of0.0009-0.0025 inch on the rocker shaftwith a maximum allowable clearance of0.006 inch. Rocker arm adjustingscrews are self-locking. If they turnwith less than 12 ft.-lbs. torque, renewadjusting screw and/or rocker arm.

Reassemble rocker arms on rockershaft keeping the following points inmind. Thrust washers are used be-tween each spring and rocker arms,and spacer rings are used betweenrocker arms and brackets except be-tween rear rocker arm and rearbracket. To insure that lubricationholes in rocker shaft are in correct po-sition, align punch mark on front end ofrocker shaft with slot in front mounting

bracket as shown in Fig. 36. End ofshaft must also be flush with bracket.The rocker shaft clamp screws onbrackets should be tightened to atorque of 10 ft.-lbs. Tighten the hold-down nuts on bracket studs to a torqueof 47 ft.-lbs.

VALVE ROTATORS

All Models

58. Positive type valve rotators areinstalled on both the inlet and exhaustvalves. Refer to Fig. 37.

Normal servicing of the valve rota-tors consists of renewing the unit. It isimportant, however, to observe thevalve action after engine is started.Valve rotator action can be consideredsatisfactory if valve rotates a slightamount each time the valve opens.

VALVE TIMING

All Models

59. To check valve tinning, removerocker arm cover and crank engine toposition number one piston at T.D.C. ofcompression stroke. Adjust number oneintake valve tappet gap to 0.014 inch.Place a 0.004 inch feeler gage betweenvalve lever and valve stem of numberone intake. Slowly rotate crankshaft innormal direction until valve lever be-comes tight on feeler gage. At thispoint, number one intake valve willstart to open and timing pointer shouldbe within the range of 23 to 29 degreesbefore top dead center.

NOTE: One tooth "out of time" equalsapproximately 11 degrees.

Readjust number one intake valvetappet gap as outlined in paragraph 54.

TIMING GEAR COVER

All Models

60. To remove the timing gear cover.

Punch mork must olignwith slot and end of shaftmust b« flush with bracket

Fig. $$—Align punch markon front end of rockershaft with siot in frontmounting bracket. End ofshaft must be flush with

bracket.

first remove hood, drain cooling systemand disconnect battery cable. Discon-nect wires to headlights, alternator andunbolt and remove alternator. Discon-nect steering lines and oil cooler linesand plug openings to prevent dirt fromentering system. Disconnect air cleanerscoop and radiator hoses. Support trac-tor under clutch housing, attach hoistto front support, then uni3olt andremove front support, radiator, axleand wheels as an assembly. Unbolt andremove fan, fan pulley, belt, cross-overfuel line and water pump. Then, unboltand remove oil pan. Disconnect tachom-eter drive cable and remove tachom-eter drive. Do not lose the smalldriving tang when removing tachome-ter drive. Remove the three capscrews, flat washer and pressure ringfrom crankshaft. Tap pulley with aplastic hammer to loosen it, then slidepulley off of the wedge rings. Unbolttiming gear cover, then pull coverforward off the dowels and removefrom engine.

Reassemble by reversing the disas-sembly procedure. When installing thecrankshaft pulley, place one pressurering on the crankshaft with thick endtoward engine. Install the wedge ringsin pulley bore so that slots in rings are90 degrees apart. Slide pulley on tocrankshaft and align with timing pin.Install pressure ring, flat washer andthree cap screws. Tighten cap screwsevenly in three steps to a torque of 22ft.-lbs., 44 ft.-lbs. and finally to 57ft.-lbs.

NOTE: Some late production crank-shaft pulleys use different number ofwedge rings. Pulley may be equippedwith three sets of wedge rings, two setsof wedge rings or one clamping ring.

TIMING GEARS

All Models

61. CRANKSHAFT GEAR. Crankshaft gear is a shrink fit on crankshaft.To renew the gear, it is recommendedthat the crankshaft b^ removed fromengine. Then, using a chisel and ham-mer, split the gear at its timing slot.

The roU pin for indexing crankshaft

Fig. 37^Cut-eway view showing instaiiatlonof a "Rotocap" valve rotator.

19

Paragraphs 62-68gear on crankshaft must protrude ap-proximately 5/64-inch. Heat new gearto 400**F. and install it against bearingjournal. Make certain all timing marksare aligned as shown in Fig. 38.

62. CAMSHAFT GEAR. Camshaftgear is a shrink fit on camshaft. To re-new the gear, remove camshaft as out-lined in paragraph 65. Gear can now bepressed off in conventional manner,using care not to damage the tachome-ter drive slot in end of camshaft.

When reassembling, install thrustplate and Woodruff key. Heat gear to400** F. and install it on camshaft.

NOTE: When sliding gear on cam-shaft, set thrust plate clearance at0.004-0.018 inch.

Install camshaft assembly and makecertain all timing marks are aligned asshown in Fig. 38.

63. IDLER GEAR. To remove idlergear, first remove timing gear cover asoutlined in paragraph 60. Idler gearshaft is attached to front of engine by aspecial (left hand thread) cap screw.

Idler gear is equipped with two re-newable needle bearings. A spacer isused between the bearings.

When installing idler gear, coatthreads of special cap screw with "Loc-tite" and tighten cap screw to a torqueof 67 ft.-lbs. End clearance of gear onshaft should be 0.008-0.013 inch. AHgnall timing marks as shown in Fig. 38.

Timing gear backlash should be asfollows:

Idler to crankshaft gear.New gears 0.007-0.015 in.Used gears (max.) 0.027 in.

Idler to camshaft gear.New gears 0.0035-0.016 in.Used gears (max.) 0.0226 in.

Idler to injection pump gear.New gears 0.0021-0.012 in.Used gears (max.) 0.024 in.

64. INJECTION PUMP DRIVEGEAR. To remove the drive gear, firstremove timing gear cover as outlinedin paragraph 60. Remove drive shaftnut and washer and the three hiib capscrews. Attach puller (IH tool numberFES 111-2) or equivalent to threadedholes in gear and pull gear and hubfrom shaft.

When reassembling, make certain alltiming marks are aligned as shown inFig. 38. For D179 engine use timingdot next to number 3 and for D206 en-gine use timing dot next to number 2and for D239 engine use timing dotnext to number 4 on injection pumpdrive gear. Refer to paragraph 91 andretime injection pump. Tighten drive

INTERNATIONAL HARVESTER

shaft nut to a torque of 47 ft.-lbs. and coat of sealing compound to edge ofthree hub cap screws to a torque of 17 plug and bcre.ft.-lbs.

CAMSHAFT AND BEARINGS

All Models

65. CAMSHAFT. To remove thecamshaft, first remove timing gearcover as outlined in paragraph 60.Then, remove rocker arm assembly andpush rods. Remove engine side coverand secure cam followers (tappets) inraised position with clothes pins orrubber bands. Working through open-ings in camshaft gear, remove camshaftthrust plate retaining cap screws. Care-fully withdraw camshaft assembly.

Recommended camshaft end play is0.004-0.018 inch. Camshaft bearing jour-nal diameter should be 2.2823-2.2835inches.

Install camshaft by reversing the re-moval procedure. Make certain timingmarks are aligned as shown in Fig. 38.

66. CAMSHAFT BEARINGS. Toremove the camshaft bearings, firstremove the engine as outlined in para-graph 51 and camshaft as in paragraph65. Unbolt and remove clutch, flywheeland engine rear end plate. Remove ex-pansion plug from behind camshaft rearbearing and remove the bearings.

NOTE: Camshaft bushings are fur-nished semi-finished for service andmust be ailgn reamed after installationto an inside diameter of 2.2844-2.2856inches.

Install new bearings so that oil holesin bearings are in register with oilholes in crankcase.

Normal operating clearance of cam-shaft journals in bearings is 0.0009-0.0033 inch. Maximum allowable clear-ance is 0.0045 inch.

When installing expansion plug atrear camshaft bearing, apply a light

ROD AND PISTON UNITS

All Models

67. Connecting rod and piston assem-blies can be removed from above afterremoving the cylinder head as outlinedin paragra])h 52 and the oil pan. OnModels 574, 674 and 584 also removethe engine balancer as in paragraph 76.

Cylinder numbers are stamped onthe connecting rod and cap. Stamp anynew or unmarked rod and cap assem-blies with correct cylinder numbers.Numbers on rod and cap should be inregister and face toward the camshaftside of engine. The arrow stamped onthe top of pistons should point towardfront of enifine.

Tighten 1 he connecting rod nuts to atorque of 61 ft.-lbs.

PISTONS, SLEEVES AND RINGS

All Models

68. Pistons are not available as indi-vidual service parts, but only asmatched units with the wet typesleeves. New pistons have a diametralclearance in new sleeves of 0.0039-0.0047 inch when measured betweenpiston skirt and sleeve at 90 degrees topiston pin.

The wet type cylinder sleeves shouldbe renewed when out-of-round or taperexceeds O.(iO6 inch. Inside diameter ofnew sleeves is 3.875-3.8754 inches.Cylinder sleeves can usually be re-moved by bumping them from thebottom with a block of wood.

Before installing new sleeves, thor-oughly clem counterbore at top andseal ring gj'oove at bottom. All sleevesshould be free to rotate by hand whentried in bores without seal rings. After

ComtHolt

Fig. 38— Gear train andtiming marks. Use timingdot next to number 4 forD239 engine, timing dotnext to number 2 for D206engine and timing dot nextto number 3 for Dl 79 en-gine on Iniectlon pump

drive gear.

ISi20

SERIES 454-464-484-574-584-674

making a trial installation without sealrings, remove sleeves and install newseal rings dry into grooves in crank-case. Wet lower end of sleeve with athick soap solution or equivalent andinstall sleeve.

NOTE: The cut-outs (n bottom ofsleeve are for connecting rod clearanceand must be installed toward each sideof engine. Chisel marks are provided antop edge of cyiinder sleeve to aid incorrect instaliation. Aiign chisel marksfrom front to rear of engine.

If seal ring is in place and notpinched, very little hand pressure is re-quired to press the sleeve completelyin place. Sleeve flange should extend0.003-0.005 inch above top surface ofcylinder block. If sleeve stand-out is ex-cessive, check for foreign materialunder the sleeve flange. The cylinderhead gasket forms the upper cylindersleeve seal and excessive sleeve stand-out will result in coolant leakage.

Pistons are fitted with two or threecompression rings and one oil controlring. Top compression ring may be con-ventional rectangular type or full key-stone type. If full keystone ring is usedproceed as follows: Prior to installingnew rings, check top ring groove ofpiston by using Perfect Circle PistonRing Gage No. 1 as shown in Fig. 39. Ifone, or both shoulders of gage touchring land, renew the piston. It is notpossible to measure ring side clearanceof a full keystone ring in the groove.Check fit of top ring as foUows: Placering in its groove and push ring intogroove as far as possible. Check the

Fig. 39—Use Perfect Circle Blng Gage No. 1to check top ifteystone) ring groove.

distance ring is below ring land. Thisdistance should be 0.002-0.015 inch. Re-fer to Fig. 40 for view showing ring fitbeing checked using IH tools FES 68-3and dial indicator FES 67.

If rectangular top compression ring isused, check side clearance in conven-tional manner. If equipped with notchon inside diameter, install with notch totop.

The second compression ring is ataper face ring and is installed withlargest outside diameter toward bottomof piston. Upper side of ring is markedTOP.

The third compression ring (if soequipped) is step cut on outside dia-meter and is installed with notchtoward bottom of piston. Upper side ofring is marked TOP.

The oil control ring can be installedeither side up, but make certain thecoil spring expander is completely in itsgroove.

Additional piston ring information isas follows:Ring End Gap,

Compression rings 0.014-0.025 in.Oil control ring 0.010-0.019 in.

Ring Side Clearance,Top compression (keystone)

ring drop 0.002-0.015 in.Top compression

(rectangular) 0.0035-0.0048 in.Second

compression 0.0030-0.0042 in.Third

compression 0.0024-0.0034 in.Oil control 0.0014-0.0024 in.

PISTON PINS

All Models

69. The full floating type piston pinsare retained in the piston bosses bysnap rings. Specifications are as fol-lows:Piston pin diameter,

All models 1.4172-1.4173 in.Piston pin diametral clearance in rodbushing.

All models 0.0005-0.0010 in.Piston pins are not available in over-

size.

CONNECTING RODS ANDBEARINGS

All Models

70. Connecting rod bearings are ofslip-in, precision type, renewable frombelow after removing oil pan, enginebalancer (if so equipped) and connect-ing rod caps.

When installing new bearing inserts,make certain that projections on sameengage slots in connecting rod and cap,

Paragraphs 69-71

and that cylinder identifying numberon rod and cap are in register and facetoward camshaft side of enjfine.

Connecting rod bearings are avail-able in standard size as well as under-sizes of 0.010, 0.020 and 0.030 inch.

Check crankshaft crankpins and con-necting rod bearings against the valueswhich follow:Crankpin diameter 2.5185-2.5193 in.Max. allowable

out-of-round 0.0012 in.Diametral clearance .. .0.0023-0.0048 in.Rod side clearance 0.006^.010 in.Rod bolt torque, ft.-lbs 61

CRANKSHAFT AND MAINBEARINGS

All Models

71. The crankshaft is supported infour main bearings in the D179 engineand five main bearings in the D206 andD239 engines. Main bearings are of thenon-adjustable, slip-in, precision type,renewable from below after removingthe oil pan, engine balancer (if soequipped) and main bearing caps.Crankshaft end play is controlled bythe flanged rear main bearing inserts.Removal of crankshaft requires R&R ofengine. Check crankshaft and mainbearings against the values whichfollow:Crankpin

diameter 2.5185-2.5193 in.Main journal

diameter 3.1484-3.1492 in.Max. allowable

out-of-round 0.002 in.Crankshaft end play 0.006-0.009 in.

Fig. 40—Top compressionshouid be 0.002-0.015 inch

for proper fit

{Keystone) ringbelow ring iand

21

Paragraphs 72-76 INTERNATIONAL HARVESTER

Main bearing diametralclearance 0.0028-0.0055 in.

Main bearing bolt torque, ft.-lbs.Necked down bolts,

Marked 10.9K 80*Marked 12.9K 97*

Pitch diameter bolts,Marked 10.9K 105*Marked 12.9K 141**With lubricated threads.Necked down bolts have a shank

diameter of 0.410 inch. Pitch diameterbolts have a shank diameter of 0.500inch.

Main bearings are available in stan-dard size and undersizes of 0.010, 0.020and 0.030 inch.

CRANKSHAFT SEALS

All Models

72. FRONT. To renew the crankshaftfront oil seal, first remove hood, draincooling system and disconnect radiatorhoses. Disconnect air cleaner scoop andwires to headlights. Disconnect steer-ing lines and oil cooler lines and plugopenings to prevent dirt from enteringsystem. Support tractor under clutchhousing, attach hoist to front support.Then, unbolt and remove front support,radiator, axle and wheels as an assem-bly. Remove belt from crankshaftpulley.

Remove three cap screws, flat wash-er and pressure ring from crankshaft.Tap crankshaft pulley with a plastichammer to loosen it, then slide pulleyoff the wedge rings. Remove wedgerings and oil seal wear ring from crank-shaft. Remove and renew oil seal inconventional manner. Renew "0" ringon crankshaft. Inspect wear ring andtiming pin for wear or other damageand renew as necessary. Use a non-hardening sealer on timing pin. Wheninstalling wear ring, timing pin mustengage slot in crankshaft gear. Installone pressure ring on crankshaft withthick end against wear ring. Placewedge rings in pulley bore so that slotsin rings are 90 degrees apart. Slidepulley onto crankshaft, aligning slot inpulley with timing pin in wear ring. In-stall pressure ring, flat washer andthree cap screws. Tighten cap screwsevenly in three steps to a torque of 22ft.-lbs., 44 ft.-lbs. and finally to 57ft.-lbs. Refer to note in paragraph 60.Reassemble tractor by reversing disas-sembly procedure.

73. REAR. To renew crankshaft rearoil seal, the engine must be detachedfrom clutch housing as follows: Discon-nect battery cables and remove hoodand rear side panels. Disconnect thetachometer cable and electrical wiringfrom engine, unclip harness and lay

tachometer cable and wiring harnessrearward. Shut off fuel and disconnectfuel lines. Remove temperature sensmgbulb from engine, then disconnectthrottle rod, fuel shut-off cable and oilpressure line. Disconnect and identifythe wires at starter, then unbolt andremove starter. Disconnect steeringlines and oil cooler lines and plug open-ings to prevent dirt from entering sys-tem. Attach a hoist or split stand toengine and support clutch housing witha rolling floor jack. Unbolt the enginefrom clutch housing and roll rear sec-tion of tractor from engine. Unbolt andremove clutch assembly and flywheel.

Then, unbolt and remove seal retain-er and seal. Check the depth that oldseal is installed in seal retainer. Newoil seal may be installed in retainer inany of three locations; 1/16-inch aboveflush with retainer (new engine originalposition), flush with retainer or 1/16-inch below flush with retainer. Locationof seal in retainer will depend on condi-tion of the sealing surface on crank-shaft. Use new gasket and install sealretainer with new seal. Tighten re-tainer bolts to a torque of 14 ft.-lbs. In-stall flywheel and tighten bolts to atorque of 85 ft.-lbs.

When recoupling the tractor, positionthe clutch assembly on the transmis-sion input shaft. Disconnect the linkagefrom clutch release shaft. Clutch can bebolted to flywheel after tractor is re-joined by working through opening atbottom of clutch housing.

NOTE: If flywheel and clutch plate

Fig. 41^Expfod9d ¥i9w ofustfd on Mod9l9 574, 674 and 584, Balancardriv9 gaar (2) Is W9ld9d to th9 crankahaft onaarly modals and a shrink tit on lata mod9l9.

1. Crankshaft2. Balancer drive gear3. Idler weight assy.4. Drive weight assy.

5. Weight shafts6. "0" ring7. Housing8. Double roll pin

balancing marks are Indicated (dab ofwhite paint), they must be aiigned.

The balance of reassembly is the re-verse of disassembly procedure.

FLYWHEEL

All Models

74. To remove the flywheel, refer tothe procedure outlined in paragraph 73.

To install a new flywheel ring gear,heat same to approximately 500 de-grees F.

ENGINE BALANCER

Models 574-674-584

75. The D206 and D239 engines areequipped with an engine balancerwhich is mounted on underside of en-gine crankcase.

Balancers are driven by a renewablegear (2—Fig. 41) which is welded tocrankshaft on early models and is ashrink fit to crankshaft on late models.The balancer consists of two un-balanced gear weights which rotate inopposite directions at twice crankshaftspeed. They produce forces which tendto counteract the vibration which isinherent in four cylinder engineshaving a single plane crankshaft (1 and4 throws displaced 180 degrees fromthrows 2 and 3). It is extremely impor-tant that balancer weights are correct-ly timed to each other and that com-plete unit is timed to crankshaft.

76. R&R AND OVERHAUL. To re-move the engine balancer, drain oil andremove oil pan as outlined in paragraph80. Unbolt and remove oil suction tubeassembly and "0" ring. Remove thetwo remaining cap screws and removebalancer from crankcase.

To disassemble the balancer unit,Hrst clean with a suitable solvent, thendrive roll pins (8—Fig. 41) out ofhousing and into weight shafts (5).Press or bump shafts out roll pin sideof housing (7) and lift out weight gearassemblies (3 and 4). Drive roll pins (8)out of shafts.

Inspect shafts, gear teeth, bushingsand housing for excessive wear orother damage. Refer to the specifica-tions which follow to determine partsrenewal and operating clearances.Backlash, crankshaft gear to

weight gears 0.010-0.016 in.Backlash between

weight gears 0.007-0.009 in.Weight gear bushing

I.D 0.9082-0.9084 in.Shaft bearing surface

diameter .0.9051-0.9055 in.

22

SERIES 454-464-484-574-584-674 Paragraphs 77-79

Weight gear operatingclearance on shaft.. .0.0027-0.0033 in.

Weight gear end clearance inhousing 0.008-0.016 in.

NOTE: Weight gear bushings are notcatalogued separately; if bushingsshow excessive wear, renew weightgear assemblies.

When reassembling, make certainthat oil passages in housing are clean.Lubricate shafts and weight gear bush-ings and place drive weight assemblyin housing. Install weight shaft fromroll pin side of housing, through theweight gear. Align roll pin hole in shaftwith roll pin hole in housing and tapshaft into position. Install roll pins asshown in Fig. 42,

NOTE: Roll pins must be shorter thanshaft diameter.

Install roll pins to a depth of 1-3/8inches in roll pin bosses. Place idlerweight in housing and with bothweights down, mesh gear teeth so thattiming marks are aligned. Install sec-ond shaft and secure with roll pin.Using a dial indicator, check backlashbetween weight gears. Backlash shouldbe 0.007-0.009 inch. If backlash isexcessive, renew weight gear assem-blies.

To install the balancer assembly,first rotate crankshaft to position No. 2piston at T.D.C. of compression stroke.Place new "0" ring (6—Fig. 41) in re-cess on balancer. Then, with weightstoward bottom of balancer housing andweight gear timing marks aligned, in-stall balancer so that timing mark ondrive weight is aligned with timingmark on balancer drive gear (2). Installnew **0** ring and oil suction tube as-sembly. Using a dial indicator, checkbacklash between balancer driveweight gear and balancer drive gear(2). Backlash should be 0.010^.016 inch.

Roll

NOTE: Whan backlash between weightgears (3 and 4) is correct (0.007-0.009inch) and backiash between balancerdrive gear (2) and drive weight gear ex-ceeds 0.016 inch, then balancer drivegear (2) is excesslveiy worn and shouldbe renewed. Refer to paragraph 77 or78.

Install oil pan with new pan gasketand fill crankcase to proper level withnew oO.

77. RENEW BALANCER DRIVEGEAR (WELD ON TYPE). To renewbalancer drive gear (2--Fig. 41), firstremove crankshaft from engine. Re-move worn or damaged drive gear(gear must not be split to remove) andany burrs which might be present ongear mounting surface of crankshaft.Heat new gear to 200 degrees F., in-stall timing roll pin in crankshaft andposition the gear on crankshaft.

CAUTION: Do not overtieat gear asthia wlii cauae diatortlon.

Make sure timing marks are facingsame end of engine as the timingmarks on the balancer drive weight.Using a low hydrogen electrode weldgear to shaft at four places V2 to Vi-inch wide spaced equally around gear.Weld must not protrude above finishedsurface on crankshaft.

78. RENEW BALANCER DRIVEGEAR (SHRINK FIT TYPE). To re-new balancer drive gear (2—Fig. 41),first remove crankshaft from engine.Remove worn or damaged drive gear,by using a chisel and splitting the gearand any burrs which might be presenton gear mounting surface of crankshaft.Heat new gear to 360-390 degrees F.,align the single mark (below the toothspace of the drive gear) with the notchon the crankshaft flange. Make suretiming marks are facing same end ofengine as the timing marks on balancedrive weight.

OIL PUMP AND RELIEF VALVE

All Models

79. The internally mounted gear typeoil pump is driven from the crankshaftgear, and is accessible for removalafter removing the engine oil pan.

The pump is mounted to the frontmain bearing cap. Remove the cap andpump assembly (Fig. 43). Leave thebearing cap on pump when repairing oilpump. The cap can be clamped in thevise to support the pump. If removal ofbearing cap is necessary, take off thebearing adjusting nut and tab lock-washer. Remove the idler gear toobtain access to the mounting bolts.

Removing the relief valve is obviousafter an examination of unit and refer-ence to Fig. 43. Specifications far reliefvalve are as follows:Valve diameter 0.825^.827 in.Valve clearance in

bore 0.003-0.007 in.Valve spring (USED)

Free length 2.520 in.Test length 1.858 in.Test load 18-20 lbs.

Valve spring (NEW)Free length 2.85 in.Test length 1.86 in.Test load 33 lbs.To disassemble the pump, remove

the snap ring from rear end of pumpand the cover nuts. The cover and bodyhave dowel pins and will have to betapped lightly with a plastic hammer.Remove the body gears and Woodruffkey from the drive gear shaft.

Inspect all parts for scoring, exces-sive wear or other damage. Checkpump against the following specifica-tions:Drive shaft end play (cover

installed) 0.000-0.0020 in.Drive shaft running clearance

(in bushings) 0.001-0.0032 in.Radial clearance

(gears to body) 0.007-0.0120 in.Idler gear running clearance

(on shaft) 0.001-0.0032 in.

Fig. 42—Sectionai view of balancer weightgear, housing and shaft used on Modeis 574,874 and 584 engines showing correct instai'iation of roil pins. Roll pins must iie shorter

than shaft diameter. Fig. 43—Exploded view of internal oil pump used on dieset engines.

23

Paragraphs 80-84 INTERNATIONAL HARVESTER

End clearance idlergear 0.002-0.0038 in.

Oil pressure at rated rpm 40-60 psiWhen reassembling, the pump plate

if removed, must be bolted to mainbearing cap before idler gear is in-stalled. Refer to Fig. 44, install idlergear and adjust the bearings to an endplay of 0.000-0.002 inch. Install pumpand main bearing cap on crankshaftand torque the bolts to values outlinedin paragraph 71.

Install oil pan with new gasket andfill crankcase to proper level with newoil.

OIL PAN

All Models

80. To remove the oil pan, place ajack under center section of tractor.Then remove lower six bolts and loosenupper two bolts in the front bolster toengine. Remove the pan bolts, thereare three pan bolts partly hidden inbetween the pan and clutch housing.Oil pan can now be removed.

GASOLINEFUEL SYSTEM

CARBURETOR

All Models So Equipped

83. All non-diesel tractors areequipped with Marvel-Schebler or Zen-ith updraft carburetors. Disassemblyand overhaul procedures are obviousafter an examination of carburetor andreference to Figs. 45 and 46.

Parts data follows:Model 454 (Early)Marvel-Schebler IH Part No.Model TSX-959 405873R91Gasket package 400429R93Overhaul package 405924R91Main jet 388587R1Idle jet 69929DIdle needle 69923DDischarge nozzle 405923R1

Venturi 405925R1Float 381962R1Float needle & seat 392096R91

Model 454 (Late)Marvel-Schebler IH Part No.Model TSX-934 398069R92Gasket package 400429R93Overhaul package 405924R91Main jet 388587R1Idle jet 69929DIdle needle 69923DDischarge nozzle 405923R1Venturi 405922R1Float 381962R1Float needle & seat 392096R91

Models 464 &574Marvel-Schebler IH Part No.Model TSX-959 405873R93

Fig. 45^Exploded view of typical Marvel-Schebler carburetor.

SfMMAT rwif

fig, 44—View showing assembling oil pumpidler gear bearing cups.

I. Gasket3. Throttle plate5. Throttle body6. Plug7. Cup plug8. Strainer assy.9. Idle jet

10. Gasket11. Float needle & seat12. Bowl gasket13. Float14. Venturi15. Choke plate assy.16. Spring17. Bowl assy.18. Clamp20. Bracket21. Idle speed stop

screw22. Packing

23. Spring24. Swivel25. Choke shaft27. Drip hole filler29. Fuel shut-off

solenoid assy.30. Retainer32. Main fuel jet33. Discharge nozzle34. Gasket35. Vent-36. Cup plug39. Float pivot shaft40. Spring41. idle mixture screw42. Stop pin43. Paclung44. Retainer45. Throttle shaft

Gasket package 400429R93Overhaul package 405924R91Main jet 404156R1Idle jet 69929DIdle needle 69923DDischarge nozzle 405923R1Venturi 405925R1Float 381962R1Float needle & seat 392096R91

Models 574 & 674Zenith IH Part No.Model 267L10 535407R92Gasket package 68441C1Overhaul package 537885R91Idle jet 384863R1Idle needle 537009R1Main jet & Discharge nozzle. .537884R1Float 381027R1Float needle ^ seat 405531R1

84. LOW IDLE ADJUSTMENT. Be-fore attempting to adjust the carbure-tor, start engine and operate untilthoroughly warmed. Then, adjust idlespeed stop screw (21—Fig. 45 or 46) toobtain a low idle engine speed of 625

Fig. 46—Exploded view of typicai Zenith car-buretor.

1. Gasket2. Strainer assy.3. Spring4. Throttle bodv5. Throttle shaft6. Gasket7. Float needle & seat8. Float pivot shaft9. Float

10. Main air bleed11. Fuel bowl12. Gasket13. Choke plate

14. Gasket15. Main jet &

discharge nozzle16. Choke shaft17. Bowl gasket18. Throttle plate19. VentuH20. Idle jet21. Idle speed stop

screw29. Fuel shut-off

solenoid assy.41. Idle mixture screw

24