TM 5-3805-260-24 D - RETURN LINE ASSEMBLIES Assembly Part Quantity No. No Description Required D - Return Line Assembly D1 Use Return Line Assembly D6 D2 Use Return Line Assembly D7 D3 Use Return Line Assembly D8 D4 Use Return Line Assembly D9 D5 5P3517 Tube Assembly-Return 1 8S9967 Adapter 1 D6 2P8335 Plain Coupler 1 3B7750 Pipe Nipple 2 4J3815 Gasket 1 D7 1P58 Filler Return Group 1 2P8337 Valved Coupler 2 3B6555 Street Ell 1 3B7749 Nipple 1 D8 3B7257 Bushing 1 9H6454 Gasket 1 1 P757 Filler Return Group 1 2P8337 Valved Coupler 1 D9 FT794 Return Line Cap Assembly 1 Use 2P8337 Valved Coupler instead of 8S9974. E - TACHOMETER DRIVE ASSEMBLIES Assembly Part Quantity No. No Description Required E - Tachometer Drive 1M5061 Tachometer Drive Group 1 E1 3B4505    Lockwasher 2 5P1 759 Tachometer Adapter (9S5609) 1 9N641 Adapter Group (Part of 5P1759) 4M8303 Seal (Part of 5P1759) E2 5P1758 Shaft Assembly (Part of P1759) 4N538 Coupling (Part of 5P1759) 9S211 Clamp 2 9S3032 Clamp 2 4L8393 Tachometer Drive Group (1.1) 1 (Drill out holes to 11/32" Dia.) 1B2714 Bolt (/"-20 x 2%") 2 E3 3B4504 Lockwasher (%") 2 3B4505 Lockwasher (5/16") 2 2S424 Service Meter Group 1 2B2695 Bolt (5/16"-18 x 7/8") 1 E4 3B4505 Lockwasher (5/16") 2 7M6006 Drive Group (Modified) 1 E5 5S6106 Adapter, 2.1 Drive 1 1B7182 Bolts 2 _ Included in 5P8687 Tool Group 4-62