Master O-ring & Part Replacement List
To completely rebuild this guy you'll need the following:
1 - AS568A Dash Number 136 O-ring (not Square Cross Section just normal round)
1 - AS568A Dash Number 037 O-Ring
1 - AS568A Dash Number 021 O-Ring
1 - AS568A Dash Number 017 O-Ring (behind the 'hex bolt')
1 - AS568A Dash Number 015 O-Ring
- AS568A Dash Number 014 O-Rings (that's three total for full replacement)
1 - AS568A Dash Number 013 O-Ring
1 - Bearing 12mm depth x 17mm id x 40mm od (range in prices from $6 to $106 from McMaster)
1 - Oil Bearing Shaft Seal 20 I.D. x 32 O.D. and <=9.3 mm in width.
Regarding the Seal: I found one at RocketSeals.com P/N 20X32X8-MOS/D
which looks like it would excel as a replacement. I haven't tested it. The I.D and O.D. need to be exact. The width just needs to be <=9.3mm. Also a report of Carquest seal PN# SLS 222020 OR INTERCHANGE # AE0997E0 WORKS GREAT
for the shaft seal.
BeratE put together a list of the Part Numbers for the FEP encapsluated O-rings and a great bearing from McMaster in this post