Disassembling input shaft
Clamp the input shaft into a vise with soft jaws.
Use universal puller, BMW No. 00 7 500, and pressure head (arrow) to pull off grooved ball bearing (9) with spacing washer (8).
Note the thickness of spacing washer (8).
Remove retaining ring (7).
Compress spring cluster (4) and remove keepers (6).
Remove spacer (5), spring cluster (4), anti-rattle disc (3), thrust block (2) and constant-speed gear (1).
Clamp input shaft (10) other way round in vise.
Use universal puller, BMW No. 007500, and pressure head (arrow) to pull off grooved ball bearing (11).
Assembling input shaft/checking and adjusting axial play of spring cluster
Lightly oil the bearing surface for constant-speed gear (1) on input shaft (10), and install the constant-speed gear.
Lightly oil the splines in thrust block (2) and install it.
Place anti-rattle disc (3) on thrust block (2).
Mount spring cluster (4) with locating ring (arrow) facing upwards on anti-rattle disc (3).
Install spacer (5).
Compress spring cluster (4) and insert the keepers (6) in the ring groove.
Install retaining ring (7) with the shoulder facing over keepers (6).
Check axial play of spring cluster (4); correct if necessary by installing spacer (5) of suitable thickness.
Check fully assembled length and adjust if necessary (see 23.21).
Install spacing washer (8) of calculated thickness, and press on grooved ball bearing (9).
Endplay: Spring cluster on shaft — 0.4…0.6 mm (0.0157...0.0236 in)