March 1957 No. 322

STUDEBAKER-PACKARD CORPORATION

MARCH 1957 NO. 322

SOUTH BEND INDIANA

POWER BRAKE UNIT NOISE - 1956-1957 STUDEBAKER AND PAGE 1957 PACKARD CLIPPER STUDEBAKER and PACKARD CLIPPER Please record this article on the Service Bulletin Reference page at the end of the BAND ADJUSTMENT - FLIGHTO MATIC (WARNER G EAR ) TRANSMISSION ...... 1 Passenger Brake section of the 1956 Studebaker POWER BRAKE UNIT NOISE - 1956-57 Car Shop Manual. STUDEBAKER AND 1957 PACKARD CLIPPER. . 1 An improved power brake unit Control Valve Piston Assembly, Part No. 1543368 has been re- STUDEBAKER leased. The improved piston assembly has two sealing cups instead of one as previously used. OPERATION ADDITION - 1953-57 STUDEBAKER SERVICE OP ERATION TIME GUIDE . . . . . 2 The two sealing cups are more effective in pre- venting air leakage into the system which usually manifests itself as a variety of noises PACKARD CLIPPER in the power cylinder assembly. In addition, the secondary cup provides a more effective OIL COOLER - 55th AND 56th SERIES PACKARD MODELS...... 4 seal against hydraulic leaks. PUSH BUTTON CONTROL VENT - 56th SERIES Packard MODELS ...... 4 Following the installation of the new piston PUSH BUTTON CONTROL INOPERATIVE - 56th assembly it will be necessary to bleed the SERIES PACKARD M ODELS ...... 4 system to remove the accumulated air. REAR FENDER PANELS . 57L MODELS . . . . . 3 SPARK Plug REMOVAL - 57L-Y MODELS WITH The Parts Depots will discontinue the Piston A IR C ONDITIONING ...... 3 Assembly, Part No. 1540627; Piston, Part No. SPEEDOMETER PINION INFORMATION - 57L 1540628, and the component parts of the piston Models...... 3 VALVE CLEARANCE ADJUSTMENT . 57L-Y These will be substituted by the assembly. MODELS WITH AIR CONDITIONING . . . . . 2 newest a-cup Piston Assembly, Part No. 1543368. WINDOW REGULATOR ASSEMBLY - 5522 AND The cups willbeavailable for service separately 5622 MODELS...... 3 under Part No.1540629, Piston Cup - Rear; and WINDSHIELD WASHER COVER AND PUMP ASSEMBLY Part No. 1543369. Piston Cup - Front (new part). - 1955-56 PACKARD-CLIPPER MODELS . . . 3 No. 322 SERVICE BULLETIN March

In any case where a rear clutch failure is adjusting valve clearances on 57L models when encountered,a close inspection should be made equipped with air conditioning. of the front band and drum. If these parts have any indication of discoloration or if the Make the adjustment in the order outlined; drum is highly glazed,or the bands are burned doing the right bank first. which would indicate over-heating; carefully RIGHT BANK clean and inspect the other transmission parts. Obviously,all damaged parts should be re- 1. Remove the air cleaner. placed. To provide and maintain satisfactory 2. Remove the compressor belt tension adjust- transmission performance, factory recommenda- ment strap (1, Fig. 1). tions for regular maintenance adjustments 3. Remove the four compressor-to-support should be followed. These include: bracket bolts. 4. Remove the supercharger and compressor drive Control linkage adjustment in preparation belts. for delivery. 5. Remove the screws from the hose clamps (2) Band adjustment at the end of first 1,000 on each side of the compressor on the fender miles and every 15,000 miles thereafter apron. for cars in normal operating service. 6. Remove the screws from the hose clamps Where the car is subjected to heavy duty underneath the body along the frame side operation such as police cars, taxi cabs, etc., rail. it is essential to carefully adjust the band at 7. Pull the evaporator-to-compressor hose (3) the end of the first 500 miles, at the end of forward to take out the slack and move the 4,000 miles and every 5,000 miles thereafter. compressor assembly forward into the corner In addition,it is recommended under such of the fender far enough to clear the valve heavy duty operation to check the control cover. pressure with a gage and adjust when necessary 8. Remove the valve cover and adjust the valve to 85 psi. (95 to 100 psi. for 57H-K and 57L clearances in the usual manner. Note that models) at 1,000 engine rpm in "D" range with the generator is left in position to drive the transmission and transmission oil at normal the water pump and fan. operating temperature. This should be done at 9. After completion of the adjustment, re- the end of the initial 4,000 mile and at every assemble the right side completely including 5,000 mile period thereafter. the adjustment of the compressor and supercharger drive belts.

LEFT BANK 1. Loosen the generator drive belt idler pulley to relieve the tension on the belt. Do not OPERATION ADDITION - 1953-1957 roll the belt off the pulley. STUDEBAKER SERVICE OPERATION 2. Remove the generator. If equipped with TIME GUIDE power steering,remove the generator and Please record the following operation on page 7 of the Electrical (J) group in the passenger car section of your 1953 - 1957 Stude baker Service Ope ra t ion Time Guide. J-136 Parking and Fender Lamp, Install new All 56-57 C & K Models 0.3 Hrs.

VALVE CLEARANCE ADJUSTMENT - 57L-Y MODELS WITH AIR CONDITIONING Please record this article on the Service Fig. 1 Bulletin Reference page of your 1957 Packard Clipper Supplement 1. Belt Tension Adjusting Strap 2. Hose clamps The following is the suggested procedure for 3. Evaporator-to-Compressor Hose March SERVICE BULLETIN No. 322

all four plugs may be removed and replaced without interference.

SPEEDOMETER PINION INFORMATION - 57L MODELS Please record this article on the Service Bulletin Reference page of your 1957 Packard Clipper Supplement. PART NO. NO. OF TEETH GEAR RATIO

FLIGHTDMATIC 1541357 18 3.07-l 1539348 17 3.31-1 1539346 18 3.54-l

STD. & O.D. 53 6503 17 3.92-l 534806 19 4.27-l Fig. 2 529061 20 4.55-l

Generator Drive Belt Idler Pulley REAR FENDER PANELS-57L MODELS Generator Power Steering Pump Please record this article on the Service Generator Support Bracket Bulletin Reference page of your 1957 Packard Clipper Supplement. power steering pump as an assembly. (See Pig. 2). Remove the generator support To facilitate the handling of fender repairs, bracket and idler pulley as an assembly. especially in cases where only the overlay is Place the belt out of the way so that it will required,a complete quarter panel assembly and stay clear of the pulleys. Note- The a rear quarter panel overlay have been made compressor belt will drive the water pump available for service. and fan. These panels are listed as follows: Remove the valve cover and adjust the valve clearances in the usual manner. 1323418 -9 R & L Quarter Panel - 4 Dr. Sedan After completing the adjustments; install 1323422- 3 R & L Quarter Panel -Station Wagon the generator support bracket and pulley 1323054 -5 R & L overlay Panel - 4 Dr. Sedan assembly, generator (or generator and putnp 1323056 -7 R & L overlay Panel -station Wagon assembly if equipped with power steering) and generator drive belt. Do not roll the belt on the pulley. Adjust the tension of WINDOW REGULATOR ASSEMBLY - the generator drive belt. PACKARD 5522 and 5622 MODELS on page 7 of Service Bulletin, NO. 320, January 1957,we stated the Parts Book code for SPARK PLUG REMOVAL - 57L-Y the Window Regulator Assembly, 5522 and 5622 MODELS WITH AIR CONDITIONING model, incorrectly. Please delete the reference Please record this article on the Service to Code 30.386 from this article. Part NOS. Bulletin Reference page of your 1957 Packard 461862- 3 are listed under Code 31.293 and Clipper Supplement. Part Nos. 1323298- 9 under code 31.2931.

Although seemingly inaccessible, the removal and replacement of the spark plugs on the 57L-Y models equipped with air conditioning is not WINDSHIELD WASHER COVER AND difficult. PUMP ASSEMBLY - 1955-56 PACKARD-CLIPPER MODELS On the right bank -Remove the air cleaner assembly. To remove No. 1 plug, first, remove Please record this article in the Accessories the inner rear bolt that retains the compressor sect ion of your 1956 Packard Shop Manual. base to the support bracket. The bolt is directly above the NO. 1 plug. Then, slip a deep 3/8" drive -13/16" socket over the plug, A cover and pump assembly is now available snap a ratchet handle into the socket and re- as a replacement part for the windshield washer, move the plug. The other three spark plugs are Part NO. PA-469407, usedonthe 1955-56 Packard- readily accessible with the air cleaner removed. Clipper models. It can be obtained from your Parts Depot and is listed as Windshield Washer on the left bank- Remove the battery. Now, Cover and Pump Assembly, Part No. 13646. 3 no. 322 SERVICE BULLETIN March PUSH BUTTON CONTROL VENT - 56th SERIES PACKARD MODELS please record this article in the Ultramatic Transmission section of your 1956 Packard Shop Manua 1.

Under certain conditions condensation may accumulate in the actuator unit of push button control and cause corrosion of the contacts; also,an accumulation of transmission oil in the unit,if leakage occurs at the manual valve lever shaft seal.

To provide ventilation so that condensation is held to a minimum and in the event of a leak at the seal so that the oil may drain, We suggest that you make the following modification.

Drill a 1/8" hole at the center lower inner edge of the base plate to provide a vent into Fig. 3 the lover main housing and another 1/8" hole in the inspection plate and gasket to provide a arcing when the control buttons are pushed or vent and drain from the main housing. Pig. 3 operated for a change of position. illustrates the approximate locations of the holes. To prevent this interference when a overtravel occurs,round-off or chamfer the two This modification will also reduce the corners (A,Fig. 3) of the contact segment. tendency of the transmission oil to seep past the seal. Therefore, it is recommended if the. This should be done when the segment is re- actuator is removed for any reason that the moved for any reason and the unit involved has modification be wade. Obviously, if a condition sharp edges . of oil in the actuator is encountered, also replace the seal. OIL COOLER -55th and 56th SERIES PACKARD MODELS PUSH BUTTON CONTROL INOPERATIVE -56th SERIES PACKARD MODELS Please record this article in the Ultramatic Transmission section of your 1956 Packard Shop Please record this article in the Ultramatic Manua 1. Transmission section of your 1956 Packard Shop Manual. An external leak or a leak at a threaded connection can and should, in most cases, be When the contact segment of the actuator Unit satisfactorily repaired locally thus avoiding a is permitted to overtravel by malfunctioning of unit re placenen t. The loss of coolant is Some member or circuit in the control system usually the most serious result and there are damage may be caused to the contact fingers on no problems involving other units that are a the finger and lead assembly. This is particu- part of or affected by the cooling system. larly true of the early production units. While, in the case of an internal leak, a unit in most instances must be replaced. Therefore, We contact segment may have a sharp edge at the oil cooler, Part No. 6480734, now supplied each corner. When the unit is permitted to for service replacement includes certain overtravel, on the return, the sharp edge may internal modifications to improve its service dig into the contact finger which will make life. As indicated there is no change in the the unit inoperative and usually create severe part number.

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