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Help, need some info on SAE 4 tail housing and 24V starter/grid heater

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  • Help, need some info on SAE 4 tail housing and 24V starter/grid heater

    We want to swap the tail housing from a R2.8 / ISF2.8 for the SAE 4 patterned tail housing from a QSF2.8.

    - Does anyone know the stock Cummins P/Ns for the tail housing and the matching SAE flywheel?
    - Does anyone know whether the flywheel is SAE 6 or 7?
    - The starter with the SAE 4 tail housing is on the RH side of the engine. Does anyone know if it's the same starter the R2.8 uses?
    - Is there a 24V option for the starter and grid heater?

    Thanks. We've been trying for weeks to get some info from Cummins and I guess they are short staffed like everyone else because no one is returning calls or emails. Frustrating times these days, so I'm hoping someone here might have some answers.

  • #2
    Hate to hear you're not getting a response. What I can find in my moonlighting:
    1. Does anyone know the stock Cummins P/Ns for the tail housing and the matching SAE flywheel?
      1. SAE4 flywheel housing option is FH9975
        1. qty
          1 3900632 Hexagon Flange Head Cap Screw 3 M8 X 1.25 X 35.
          2 3902116 Hexagon Flange Head Cap Screw 7 M12 X 1.75 X 50.
          3 3910248 O-Ring Plug 1
          4 3910260 O-Ring Seal 1
          5 5265267 Oil Seal 1
          5304509 Flywheel Housing 1
          6 3900068 Ring Dowel 2
          7 5304510 Flywheel Housing 1
    2. Does anyone know whether the flywheel is SAE 6 or 7?
      1. Not sure... The options to inquire about are:
        1. FW90288
        2. FW90434
        3. FW90707
        4. FW9544
    3. The starter with the SAE 4 tail housing is on the RH side of the engine. Does anyone know if it's the same starter the R2.8 uses?
      1. Here is a breakdown of the R2.8 starter characteristics/PN and all of the QSF starter options I could find:
        1. R2.8 Starter QSF 24v Starter QSF 12v QSF 12v QSF 12V QSF 12v
          Option ST9672 Option ST9747 Option ST9801 Option ST9731 Option ST9668 Option ST9647
          PN 5310341 PN 5349330 PN 5449610 PN 5344876 PN 5363153 PN 5302289
          PINION DIAMETRAL PITCH: 8/10 PINION DIAMETRAL PITCH: 8/10 PINION DIAMETRAL PITCH: 8/10 PINION DIAMETRAL PITCH: 8/10 PINION DIAMETRAL PITCH: 8/10 PINION DIAMETRAL PITCH: 8/10
          PINION GEAR OD (MM): 40 PINION GEAR OD (MM): 40 PINION GEAR OD (MM): 40 PINION GEAR OD (MM): 40 PINION GEAR OD (MM): 40 PINION GEAR OD (MM): 40
          PINION GEAR OFFSET (MM): 0 PINION GEAR OFFSET (MM): 0 PINION GEAR OFFSET (MM): 0 PINION GEAR OFFSET (MM): 0 PINION GEAR OFFSET (MM): 0 PINION GEAR OFFSET (MM): 0
          PINION DRIVE TYPE: PINION DRIVE TYPE: PGR (PLANETARY GEAR PINION DRIVE TYPE: PGR (PLANETARY GEAR PINION DRIVE TYPE: PGR (PLANETARY GEAR PINION DRIVE TYPE: PINION DRIVE TYPE: PGR (PLANETARY GEAR
          PGR (PLANETARY GEAR REDUCED) REDUCED) REDUCED) REDUCED) PGR (PLANETARY GEAR REDUCED) REDUCED)
          MOUNTING FLANGE TYPE: MOUNTING FLANGE TYPE: MOUNTING FLANGE TYPE: MOUNTING FLANGE TYPE: MOUNTING FLANGE TYPE: MOUNTING FLANGE TYPE:
          SAE#1 - 3 BOLT, 90 DEGREES SAE#1 - 3 BOLT, 90 DEGREES SAE#1 - 3 BOLT, 90 DEGREES SAE#1 - 3 BOLT, 90 DEGREES SAE#1 - 3 BOLT, 90 DEGREES SAE#1 - 3 BOLT, 90 DEGREES
          FRAME SIZE DIAMETER: 81.9 FRAME SIZE DIAMETER: 81 FRAME SIZE DIAMETER: 81.9 FRAME SIZE DIAMETER: 81.9 FRAME SIZE DIAMETER: 81.9
          PILOT DIAMETER: 88.9 PILOT DIAMETER: 88.9 PILOT DIAMETER: 88.9 PILOT DIAMETER: 88.9 PILOT DIAMETER: 88.9 PILOT DIAMETER: 88.9
          STARTER MOTOR LENGTH: 241.5 STARTER MOTOR LENGTH: 242 STARTER MOTOR LENGTH: 241.5 STARTER MOTOR LENGTH: 238MAX STARTER MOTOR LENGTH: 241.5 STARTER MOTOR LENGTH: 241.5
          STARTER MOTOR ENGINE MOUNTED ANGLE: STARTER MOTOR ENGINE MOUNTED ANGLE(DEG): STARTER MOTOR ENGINE MOUNTED ANGLE: STARTER MOTOR ENGINE MOUNTED ANGLE: STARTER MOTOR ENGINE MOUNTED ANGLE:
          250+/-20 DEG 105+/-15 87+/-20 DEG 250+/-20 DEG 87+/-20 DEG
          REMOVAL LENGTH: 66.5 REMOVAL LENGTH: 57 SEALING PROVISION: YES SEALING PROVISION: NO SEALING PROVISION: NO
          MANUFACTURER: DIXIE MANUFACTURER: PRESTOLITE REMOVAL LENGTH: 66.5 REMOVAL LENGTH: 57 REMOVAL LENGTH: 66.5 REMOVAL LENGTH: 66.5
          MODEL: S11-25102 MODEL: SM81R3001 MANUFACTURER: DIXIE MANUFACTURER: PRESTOLITE MANUFACTURER: DIXIE MANUFACTURER: DIXIE
          VOLTAGE: 12 V VOLTAGE: 24 V MODEL: S11-30110 MODEL: M81R2504 MODEL: S11-25103 MODEL: S11-30101
          KILOWATT RATING: 2.5 KILOWATT RATING: 3.5KW VOLTAGE: 12 V VOLTAGE: 12 V VOLTAGE: 12 V VOLTAGE: 12 V
          UNIQUE CHARACTERISTICS: APLLIED TO -41 DEGREE UNIQUE CHARACTERISTICS: 24V KILOWATT RATING: 3KW KILOWATT RATING: [email protected] KILOWATT RATING: 2.5 KILOWATT RATING: 3KW
          LOW TEMPERATURE STARTING NAMEPLATE BRAND: DIXIE NAMEPLATE BRAND: DIXIE NAMEPLATE BRAND: DIXIE
          UNIQUE CHARACTERISTICS: 12V UNIQUE CHARACTERISTICS: N/A UNIQUE CHARACTERISTICS: 12V
          CONNECTOR SWITCH TYPE: SPADE
          DRIVE MODE:ELECTROMAGNETIC
    4. Is there a 24V option for the starter and grid heater?
      1. 24v starter option number is ST9747 and the characteristics noted are above
      2. 24v grid heater is part of intake option IM9327, PN is 5536524 but I'm not sure if that same heater element would fit in R2.8 intake or not.

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    • #3
      Huge thanks man! This is great info!

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