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Hudson 480 Series Mechanical Procedure Manual

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  • Page 2 FOREWORD This manual is a supplement to and is to be used in conjunction with the 480-490 Mechanical Procedure Manual. For quick reference, all service procedure changes and corrections in this supple- ment refer to group and page numbers as set forth in your 480-490 Mechanical Procedure Manual.

  • Page 3: Alphabetical Index

    Slow Idle Adjustment Generator (Shunt) Specifications (Changes) Ignition Timing Vacuum Booster Test Mechanical Advance Curve 20 & 21 HUDSON DRIVE-MASTER - Spark Plugs SECTION 10 Spark Setting Conditions No. 8 & 10 Correction. Specifications Fuse Change Vacuum Advance Curve (6 cyl ) 20 &...
  • Page 4 SECTION 2 ENGINE TUNE-UP VACUUM TEST - PAGE 2-2 Paragraphs No. 4, 5 & 6 should read: Start the engine and run engine at 1800 RPM. Normal pres- Paragraph 4 should read: An engine in good sure should be 3-1/2 to 4-1/2 pounds on the standard condition will show a steady or slightly fluctuating A C pump, 3 to 4 pounds with A C combination fuel high vacuum reading of from 17"...
  • Page 5 On all 6 cylinder engines after the above serial OIL PAN TRAY BAFFLE - PAGE 3-14 No's. a new intake manifold is used with the flange (8 CYLINDER) angle changed to compensate for the angle at which the engine is secured and allows the carburetor to set A sheet metal baffle has been added to the oil pan in a vertical position when mounted.
  • Page 6 A new plug can be installed (with J-483 vibration CAUTION: Make sure valves (A) and (E) are dampener installer tool handle) from below the turned to the off position before turning on air engine with the oil pan removed, or from above by supply.
  • Page 7 NOTE: The oil flow described applies only with tight. S.A.E. 30 oil at normal temperatures and an air gauge pressure of 25 pounds. 4. If crankshaft turns too freely, check for loose bearings working one bearing at a time by plac- NOTE: It is usually necessary to reposition the ing a piece of brass shim stock .002"...
  • Page 8 It is also recommended that the KMO-500 4. Place the gauge on the crankshaft journal, Figure Bearing Leak Detector be used in final checking of 5, and rock it slightly radially several times. a bearing replacement as this unit will not only give you a recheck of your work but will also pre-lubri- 5.
  • Page 9 in pairs; never use a new bearing half with an old bearing half. CAUTION: No. 2 and No. 3 bearing caps can be reversed in error. Always place punch marks on the caps and the block before removal to insure proper installation SIX CYLINDER MAIN BEARING, CRANKSHAFT,...
  • Page 10 3/16" to distribute the thrust over a greater area and improve the life of the bearing. Always use "Genuine Hudson Bearings". Refer to your parts manual for part numbers for this new type bear- *EXAMPLE ing.
  • Page 11 chamber and extending to the cylinder bores. Figure When checking piston clearance use a 1/2" feeler gauge that will extend the length of the bore. (Use a .002" feeler gauge for 6 cylinder engines and a .0015" feeler gauge for 8 cylinder). Place the feeler gauge directly opposite the piston skirt slot when checking piston clearance.
  • Page 12 Beginning with car Serial No. 491-52515 a all the 480 models and on 490 series up to June 13, third type connecting rod (forging No. 302601) is 1949. Part 300098 was superseded by Part No. used. In this type rod the "I" beam section has been 301934.
  • Page 13 On some of the earlier models it was found that same screw previously used to hold the oil pipe in the vibration dampener became inoperative due to place, Figure 13. With the new trough installation, the outer member becoming locked by the head of the hole drilled for the old type tube oiler is discon- the large cap screw when the screw was tightened.
  • Page 14 ENGINE FRONT MOUNTING - PAGE 3-36 Front engine mountings can be removed without removing the front engine support plate by placing a block of wood between head of jack and oil pan and after removing the self-locking nuts and lock- washers from the insulator center bolts, and the two bolts, nuts and lockwashers attaching the insulators to the frame (each side), jack engine up sufficiently...
  • Page 15 Perform the operations under "Camshaft and Oil 3. Install front wheel, lower car, remove jack and Pan Removal - 6 Cylinder", Pages 14 and 39, 480- fender covers. 490 Procedure Manual and remove the tappets from below. 4. Connect hood prop to hood and align hood. The proper clearance when fitting tappets is VALVES AND SEATS - PAGE 3-42 .00075"...
  • Page 16 A properly refaced valve will contact the valve seat throughout its entire circumference and the valve stem will "float" in the guide, free from valve stem friction. NOTE: The best valve grinding and aligning job will go for naught if care is not used when tight- ening the cylinder head.
  • Page 17 use lacquer thinner and the KMO-122 Metal Brush. NOTE: Always place clean rags below the valve guides to absorb any surplus draining of the thinner. FLYWHEEL MARKING - PAGE 3-44 Flywheel assembly, Part No. 166302, which was previously specified for the 480-490 series six-cylin- der engines, has been revised so that the timing marking which read UDC-1-6 now reads UDC-1, Figure 18.

  • Page 18: General Specifications

    No. 56 Drill (647SA) Metering Rod (Vacumeter Type) Economy step .063" diameter 6 cylinder (647S) Middle step tapers to .0565" Hudson Part No. 301943 Power step, .048" diameter. Carter Part No. 75-610 diameter. Length 2-59/64". 6 cylinder (647SA) Economy step .061" diameter Hudson Part No.
  • Page 19 FAST IDLE ADJUSTMENT - PAGE 9 SLOW IDLE ADJUSTMENT - PAGE 4-9 If the carburetor has been removed from the 1. Start engine and allow engine to warm up. engine use the following procedure for setting the "Fast Idle Adjustment." NOTE: Check choke valve (must be wide open when engine is warmed up).
  • Page 20 CARBURETOR REPAIR - PAGE 4-11 and the revision of the distributor automatic advance curve. Carburetors with the new style If excessive engine "stumbling" or hesitation is jets can be identified by the part number (647SA) encountered at speeds of 15 to 17 MPH, on 6 cylin- on the metal tag attached to the carburetor.
  • Page 21 GASOLINE TANK - PAGE 4-24 is a machine cut thread and the end having the 1/1 6 x 45 degree chamfer should be started in the cylinder The gasoline tank vent is located at the top or block, this is important s o that the stud will drive highest point of the tank and is connected by a hose tight before bottoming.

  • Page 22: Specifications

    SECTION 6 ELECTRICAL SPECIFICATIONS CORRECTIONS AND ADDITIONS GENERATOR - PAGE 6-2 Max. Charging Rate - Cold 43 amps @ 8 volts Max. Charging Rate - Hot 37 amps @ 8 volts Field Draw Total, @ 6 volts - - 1.60 - 1.78 Amps. Motorizing Draw @ 6 volts - - 4.85 - 5.40 Amps.
  • Page 23 BATTERY - PAGE 6-6 GENERATOR - PAGE 6-7 BATTERY GROUND STRAP A few of the late 490 series cars were equipped with a "Shunt Wound" generator and a "Vibrating Type" current - voltage regulator. These units can be A clean tight battery to ground strap is important identified as follows: Generator No.
  • Page 24 491-76984 the mechanical advance range was SPARK SETTING - PAGE 6-17 modified. These distributor assemblies may be identified by the vendor part number on the name Paragraph three should read: Correct spark setting plate: IGS-4213-1 has a 12 degree advance and is obtained with the number one cylinder at top dead IGS-4213A-1 has a 8.5°...
  • Page 25 CIRCUIT BREAKERS - PAGE 6-25 Starting with car serial No. 491-133694 the main circuit breaker was changed from 30 ampere rating to 20 ampere to give better wiring protection. When ever necessary to replace a circuit breaker use the 20 ampere circuit breaker. DIRECTION INDICATOR - PAGE 6-28 Paragraph 1 should read: The direction indicator switch is operated by a lever located on the steering...
  • Page 26 7. Move switch lever up and turn wheel 1/4 turn left. SECTION 7 Pin should strike left pawl and disengage switch. CLUTCH ENGAGING SPRINGS - PAGE 7-7 8. Repeat with switch lever down and turn wheel right. Pin should strike right pawl and disengage Instructions should read as follows: switch.
  • Page 27 SECTION 8 VACUMOTIVE DRIVE ADJUSTMENTS - PAGE 8-10 Adjustment No. 8, Page 8-12, should read as follows: Check length of valve rod (applicator valve) (25) Figure 1. If the setting is correct, the center line of the pin (24) will be exactly in line with the center line of the piston rod pivot bolt (23) as indicated by large arrow.
  • Page 28 3. Remove the cotter pin at the piston valve and rod link pin and disconnect lever link from bellcrank. 4. Remove piston rod pivot bolt (23). 5. Remove two bolts attaching clutch unit solenoid to the clutch power unit cylinder and remove clutch unit solenoid.
  • Page 29 INSTALLATION: BELLCRANK TO COUPLING LEVER ROD AND PLAY LINK To install reverse procedure of removal and check REMOVAL: for throttle cross rod binding in the mounting brack- 1. Perform operations 1, 2 and 3 under valve lever removal and remove the cotter pin, flat washer, spring and pin attaching play link to piston rod PISTON VALVE LEVER bellcrank.
  • Page 30 VACUMOTIVE DRIVE No. 2 and a ground. Lamp should not light. HARNESS CHECK NOTE: When making a harness check, disconnect D. With jumper connected as in "C", connect a test the complete Vacumotive Drive Harness: one wire lamp between negative battery terminal and prod to at instrument panel switch, socket plugs at clutch accelerator switch plug socket Nos.
  • Page 31 NOTE: Use a small drift and a light hammer for this operation. SECTION 10 HUDSON DRIVE-MASTER CONDITION NO. 8 - PAGE 10-14 Paragraph "C" should read: Follow with Drive- Master Adjustments No. 3, 5 and 7 in order. Also check "Vacumotive Drive Adjustments"...
  • Page 32 3. Move power lever to high (forward). Gear To Install: Reverse procedure of removal Shift lever in neutral. TRANSFER DIAPHRAGM CYLINDER - PAGE NOTE: When assembling the diaphragm cylinder the 10-20 hole in the rear cover and the depression in the front cover should both be at the bottom to insure proper REMOVAL: locating when installing.
  • Page 33 TROUBLE SHOOTING SECTION 11 MECHANICAL OVERDRIVE CONDITION NO. 10 OIL SEAL (O.D. MAINSHAFT) - PAGE 11-6 DASH CONTROL IMPROPERLY CONNECTED: To the installation instructions add: Use Installing Tool J-2038 to install the overdrive output shaft oil seal. A. Unless the overdrive dash control wire is connected to the control lever on the left side OIL SEAL (O.D.
  • Page 34 more than 1/4 inch, it indicates that misalignment withdraw the pawl properly. If the stem can be probably exists. To correct this, loosen the 4-cap rotated when grasped by a pair of pliers, it indi- screws holding the overdrive housing to the trans- cates that the internal keying has been sheared.

  • Page 35: Front Suspension

    NOTE: When all Universal Joints are in the same SECTION 12 plane, the arrow on the front face of the rear PROPELLER SHAFT AND propeller shaft tube will be in line with the arrow on the rear propeller shaft sleeve yoke assembly, UNIVERSAL JOINTS Figure 1.
  • Page 36 FIGURE 2 SECTION 16 SPRINGS, SHOCK ABSORBERS FIGURE 1 AND STABILIZERS REAR SPRINGS 4. When installing the seals the rubber lip faces to the casting as shown in cross-section Figure 1 and Effective November 14, 1948, production began the spacers (C) and (G) positioned as shown. using as an option for light scale only, a Spring Perch rear spring Part No.
  • Page 37 FIGURE 1 SECTION 17 HAND BRAKE LEVER AND BRAKE CABLE ADJUSTMENT - PAGE 17-9 BRAKES With the hand brake fully released, the brake BRAKE PEDAL ADJUSTMENT - PAGE 17-9 cables should permit the anchor ends of the rear brake shoes to rest on the anchor pin; if not readjust The brake pedal lever (8) Figure 1 should have as follows: between 1/4"...

  • Page 38: Wheels And Tires

    BRAKE PEDAL - PAGE 17-10 MAJOR BRAKE ADJUSTMENT - PAGE 17-13 Refer to paragraphs 14, 15, 16 and 17, also note Add the following note: After May 31, 1949 there references and make the following changes: The was released for production a new brake pedal rod .015"...

This manual is also suitable for:

490 series