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750-115 Driveshafts R4 2021-06-29.Pdf 750-115 Driveshaft Table of Contents Updated 2021/06/29 1 Revision History ......................................................................................... 1 16.7 Section Assembly .......................................................................... 70 2 Giving Credit Where Credit Is Due ............................................................ 2 17 Installation ................................................................................................ 71 3 Source of Information ................................................................................ 2 17.1 Alignment ..................................................................................... 71 4 Preemptive Warnings ................................................................................. 4 17.2 Balancing ...................................................................................... 74 5 Terminology ............................................................................................... 4 17.3 Flexible Joint ................................................................................. 74 6 Driveshaft Manufacturer ............................................................................ 7 17.4 Lubrication .................................................................................... 75 6.1 750-101 ........................................................................................... 7 18 Hardware .................................................................................................. 77 6.2 105-115 ........................................................................................... 8 18.1 Bolt manufacturer: ........................................................................ 77 7 750-101 Vehicle Identification ................................................................... 9 18.2 Bolt Installation Direction ............................................................. 78 7.1 Series & Model Variations .............................................................. 9 18.3 Dimensions ................................................................................... 81 7.2 Column or Floor Shift ................................................................... 10 18.4 Threads – Front Shaft & Nut ......................................................... 83 8 Mysteries & Conclusions – 750 Series ..................................................... 11 18.5 Torque Values ............................................................................... 83 8.1 How to Explain Bearing / Bearing Spacer / Slinger / Spring Change? 23 18.6 Miscellaneous Other Hardware ..................................................... 84 8.2 Changes were they Simultaneous, Coordinated, Haphazard? ....... 24 19 Problem Resolution .................................................................................. 87 9 Other Evolutionary Changes .................................................................... 25 10 Berlina & T.I. Only .................................................................................. 34 10.1 According to Parts Manual............................................................ 36 10.2 Identification by Measurements .................................................... 37 11 Sprint & Spider ......................................................................................... 38 11.1 According to Parts Manual............................................................ 38 11.2 Identification by Measurements .................................................... 39 12 SS & SZ .................................................................................................... 41 12.1 According to Parts Manual............................................................ 41 12.2 Identification by Measurements .................................................... 41 13 105 & 115 ................................................................................................. 42 13.1 According to Parts Manual............................................................ 42 14 Remove - Driveshaft ................................................................................ 43 15 Evaluation................................................................................................. 44 15.1 BEFORE Removing From Vehicle ............................................... 44 15.2 BEFORE Disassembly .................................................................. 44 15.3 Pawl / Pawl Bush .......................................................................... 46 15.4 Threads – Front Shaft & Nut ......................................................... 47 15.5 Splines ........................................................................................... 47 15.6 U-joint ........................................................................................... 48 15.7 Vibrations ...................................................................................... 48 15.8 Straightness & Balance Specifications .......................................... 50 16 Rebuild ..................................................................................................... 51 16.1 BEFORE Disassembly .................................................................. 51 16.2 Balancing ...................................................................................... 51 16.3 Pawl Bush ..................................................................................... 51 16.4 Ball Bearing .................................................................................. 52 16.5 Sliding Joint .................................................................................. 60 16.6 U-joint ........................................................................................... 60 Copyleft --- sharing with Alfa community Originally provided by Carl R. Davis Send correction to [email protected] 750-115 Driveshaft Preamble Page | 1 This document is the authors best effort, it certainly is incomplete and probably has errors. Caveats #1: Italy/Alfa Rule – there are always exceptions, intentional and otherwise. #2: 50+ years of maintenance creates changes, intentional and otherwise #3: Parts catalogs are great sources of information, but do contain errors. #4: Parts catalogs sometimes reuse illustration after part design changes. #5: Parts catalog artists did not always understand part assembly order as described by the engineer. #6: Bill Gillham may have summarized it correctly, “Alfa was consistently inconsistent”. 1 Revision History Version Date Section Change Rebuild / Ball Bearing / Ball Bearing • Split Removal and Reinstall into separate sections. • Added instruction to use shims to keep Slinger from touching Housing. • Added missing instruction to “Place Spacer on shaft” Mysteries & Conclusions – 750 Series New discovery: the spacer comes in two version: (chart covering the spacer) • If front section flange held by nut & cotter pin; then spacer is 4 mm thick • If front section flange held by nut & pal-nut; then spacer is 3 mm thick Other Evolutionary Changes (U-joints) Corrected the measurements of the 750-101 U-joint Evaluation / BEFORE Removing From Vehicle New section. R 4 2021/06/29 Evaluation / U-joint / Flexibility New section Evaluation / U-joint / Snap-rings New section Rebuild / U-joint Education New section Rebuild / U-joint / Axial Play / Centering New section • Added evaluation and installation commentary based on Weber State University videos Rebuild / U-joint • Slip Joint – added comment about adding alignment marks. • Cross-Reference – corrected listing for 750 and 101-1300 Hardware / Torque Values Correction for 750-101. Driveshaft Manufacturer / 750-101 Changed statement from “rear section by Hardy-Spicer” to both sections. Driveshaft Manufacturer / 750-101 / Corporate History Added history of Hardy-Spicer. Mysteries & Conclusions – 750 Series Added direction of installation to drawing of 1365.24.004 Evaluation / Splines Added author’s method of testing Spline clearance. Evaluation / U-joint Yoke Added new section Evaluation / Straightness & Balance Specifications Added sample observation of 750 front section eccentricity R 3 2021-05-18 Rebuild/Ball Bearing / Removal, Installation / 750-101 Added design of tool for bearing removal, installation in 750-101 driveshaft center bearing housing Rebuild / U-joint / Snap-ring Added 1960’s Hardy-Spicer image with dimensions Rebuild / U-joint / Removal New section Rebuild / U-joint / Lubrication During Install New section Rebuild / U-joint / Cross Reference Added 750 unit Hardy-Spicer (GKN) K 11-04, made in UK R 2 2021-03-09 Entire document Some reformatting to match other documents by author Copyleft --- sharing with Alfa community Originally provided by Carl R. Davis Send correction to [email protected] 750-115 Driveshaft Preamble Page | 2 Application Analysis / 750 & 101 - According to Parts Manual • Add part # of front assembly • Several number corrections Identification by Measurements …. In each of following • Section name change to make it easier to find. • Berlina • Major reorganization • Sprint & Spider • Added Hein Brand supplied measurements from NOS samples • SS & SZ • 105 Evaluation / Before Disassembly • Added photo: out of balance example • Added photo: marks on NOS Giulia Super rear section Rebuild / Ball Bearing / Bearing Removal & Reinstall / 105 Late New section & 115 Rebuild / Ball Bearing / Bearing Terminology New section, including “internal clearance” specification of “C3” Hardware
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