VR57 Parts Interchange

This is basically an interchange between the Paxton part numbers and the Ford part numbers. This is by no means conclusive and is only provided as an indication, as design differences may be more subtle than those indicated in the diagrams. Its more of a guide rather than a definitive reference.

NOTE:- The Ford numbering system is typically B7A-99597-A where the B7A prefix represents B for the 1950s decade, 7 for the year within the decade and A for product identification (A = passenger cars, S = Thunderbird). The 99597 is the basic number where the 99 represents the supercharger group, and 597 represents the unique ID for the part. The suffix A indicates design differences (A is the first issue). For the sake of this interchange only the basic number is detailed for the supercharger parts.

The left hand number represents the numbering on the following McCulloch schematic. Notes explaining differences follow the interchange section.

No.    McCulloch     Ford               Description                                      Note

1          58025            99597           Housing Assembly bearing.

2          100021          99662           Seal

            58068            99657            Valve Assembly, Control                 (1)

3          58034                                   Valve, Control                                   (1)

4          58043                                   Diaphragm, Control                         (1)

5          103983                                 Ring, retaining                                  (1)

6          58046            370948-S      Washer, wave

7          104025                                 Screw, set 8-32 x                          (2)

8          58045A          99653            Shaft, Control                                   (2)

            58075B                                 Control cap service kit                (7)

9          58042B          99651            Cap, Control

10        102462                                  O-Ring                                             (2)(8)

             58076                                    Control spring service kit               (7)

11        58044            99652             Guide, Control spring                     (2)

12        58073            99641             Spring, Control

13        58074                                     Spring, Conical                              (2)(9)

14        58048            99647             Spring, Lever

15        58050            99645             Retainer, Control lever spring

16        58081            99650             Lever, Control

17        101497          44710-S         Nut, Hex, 3/8-32                             (2)

18        101991          370946-S       Screw, fil hd, 10-24 x 1/2

19        58063            99658             Valve, Regulator

20        58069            99660             Spring, Regulator

21        58065            99659             Screw, Seal

22        58038            99624             Multiplying Lever Assembly

23        58033            99654             Ring, Retaining

24        58008            99623             Piston

25        101863          87069-S         O-Ring

26        103938          87099-S         O-Ring

27        58020            370950-S       Shim, .089 to .091

            58020A          370951-S       Shim, .094 to .096

            58020B          370952-S       Shim, .099 to .101

            58020C          370953-S       Shim, .105 to .107

            58020D          370954-S       Shim, .111 to .113

            58020E          370955-S       Shim, .117 to .119

            58020F          370956-S       Shim, .084 to .086

            58020G          370957-S       Shim, .079 to .081

            58020H                                   Shim, .123 to .125

28        58024             99598            Carrier Assembly, Race                   (3)

29        58021             37058-S         Ring, Race Carrier

30        58031             99633             Bumper

31        58029             99635             Driver Assembly, Ball

32        101556           359118-S       Pin, Roll (press fit)

33        58012             99655             Output Shaft Assembly                     (4)

33A     58028             99636             Ring, Outer seal                                 (4)

34        58058             99656             Ball Drive Kit (matched set of 5)      (4)

35        58084             99594            Scroll Assembly (3/8 oil drain)         (5)

36        58060                                     Race, Outer (matched pair)              (4)(7)

37        58019             99622             Gasket, Bearing Housing

38        102195           99639             Pin, dowel

39        37018             99661             Shim, Impellor, .026 to .028

40        58040             99596              Impellor

41        100350           356184-S       Washer, flat, 5/16

42        100271           34806-S         Washer, lock, 5/16

43        102199           304721-S       Screw, hex hd, 5/16-24 x 1 1/4

44        58002             99595             Cover, Scroll                                      (6)

45        102108           304720-S       Bolt, hex hd, 5/16-18 x 1 1/4

46        100271           34806-S         Washer, lock, 5/16

47        100350           356184-S       Washer, flat, 5/16

48        103059           370949-S       Screw, fil hd, 10-24 x 5/8

49        103850                                    Plug, pipe, 3/8                                   (7)

             100432                                    Plug, pipe (earlier models)          (7)

Notes

Note 1:          Control valve assembly, comprising Control Valve (Item 3), Diaphragm (Item 4)  and Retaining Ring (Item 5). Ford supplied this as the complete assembly without part numbers for the constituent parts.

Note 2:         Different control shaft components used on Ford. See diagrams below.

Ford Control Shaft

 

Paxton Control Shaft

Note 3:         Race carrier assembly different. Ford part number is 99598. See diagrams below.

Ford Race Carrier

Paxton Race Carrier

Note 4:          Output shaft assemblies different. Ford part number is 99655. See diagrams below.

Ford Output Shaft

Paxton Output Shaft

Note 5:          Extra posted screw on Ford unit. See diagrams below.

Ford Scroll Covers

Paxton Scroll Covers

Note 6:     Extra screw on Ford unit. See diagrams above.

Note 7:     Not supplied by Ford.

Note 8:     Not used on VR57 superchargers. Only fitted or VR57A/B rebuilt by Paxton.

Note 9:     Not used on VR57 superchargers. VR58 only.