PAGE 88
© Copyright Hewland Engineering Limited 2001-2008
22
nd
February 2005
FTR Technical Bulletin No. 011
FTR/FTRL 12:34 Pinionshaft – Locking Nut & Ring
Hewland Engineering has recently been made aware of some thread failures on FTR pinionshafts. The occurrence of these failures was limited to the 12:34 ratio
(used mainly in Formula 3 applications). Two steps have been taken by Hewland Engineering to ensure future failures are avoided, these are:-
1. All FTR pinionshafts will now feature rolled threads.
2.
The
‘problematic’
pinionshaft
(12:34) will now feature a longer thread.
Fig. 1
Longer thread on 12:34 pinionshafts (left)
Customers who run 12:34 FTR pinionshafts need to be aware that the new ‘lengthened thread’ parts (which will be phased in over the next few months) require a dif-
ferent locking nut and locking ring. The new lock nut (to replace FTR-230) is
FTR-230-A
and the locking ring is
FTR-230-B
(which will replace HP-M-4026). For final
drive ratios other than 12:34 the nut & ring remain unchanged. These new parts will be available from Hewland stores shortly.
The lightweight FTRL pinionshaft is also affected, as a 12:34 ratio will also feature the longer thread and will therefore require the new locking nut & ring as mentioned
above.
James Batchelor
(Design Engineer)
Содержание FTR
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Страница 27: ...PAGE 27 Copyright Hewland Engineering Limited 2001 2009 6 SPEED VARIABLE PARTS ...
Страница 33: ...PAGE 33 Copyright Hewland Engineering Limited 2001 2009 LAYSHAFT ASSEMBLY 6 SPEED FTRE RATIOS ONLY Fig 15 ...
Страница 35: ...PAGE 35 Copyright Hewland Engineering Limited 2001 2009 SELECTOR ASSEMBLY 6 SPEED FTRE RATIOS ONLY Fig 17 ...
Страница 47: ...PAGE 47 Copyright Hewland Engineering Limited 2001 2009 5 SPEED VARIABLE PARTS ...
Страница 49: ...PAGE 49 Copyright Hewland Engineering Limited 2001 2009 Fig 23 BEARING CARRIER OPTIONS ...
Страница 50: ...PAGE 50 Copyright Hewland Engineering Limited 2001 2008 ILLUSTRATED PARTS LIST FOR DIFFERENTIAL CONFIGURATIONS ...
Страница 64: ...PAGE 64 Copyright Hewland Engineering Limited 2001 2008 RAMP ORIENTATION Fig 37 ...
Страница 65: ...PAGE 65 Copyright Hewland Engineering Limited 2001 2009 GEARBOX TOOLING Fig 38 ...
Страница 67: ...PAGE 67 Copyright Hewland Engineering Limited 2001 2009 INSTALLATION DRAWINGS MAINCASE AND BEARING CARRIER ...
Страница 68: ...PAGE 68 Copyright Hewland Engineering Limited 2001 2008 Fig 39 ...
Страница 69: ...PAGE 69 Copyright Hewland Engineering Limited 2001 2009 Fig 40 ...
Страница 70: ...PAGE 70 Copyright Hewland Engineering Limited 2001 2008 Fig 41 ...
Страница 71: ...PAGE 71 Copyright Hewland Engineering Limited 2001 2009 Fig 42a OUTPUT FLANGE VARIATIONS ...
Страница 72: ...PAGE 72 Copyright Hewland Engineering Limited 2001 2008 Fig 42b OUTPUT FLANGE VARIATIONS ...
Страница 73: ...PAGE 73 Copyright Hewland Engineering Limited 2001 2009 Fig 42c OUTPUT FLANGE VARIATIONS ...
Страница 74: ...PAGE 74 Copyright Hewland Engineering Limited 2001 2008 2nd JUNE 2005 Fig 43 ...
Страница 77: ...PAGE 77 Copyright Hewland Engineering Limited 2001 2009 James Batchelor Design Engineer Fig 44 ...
Страница 82: ...PAGE 82 Copyright Hewland Engineering Limited 2001 2008 ...
Страница 83: ...PAGE 83 Copyright Hewland Engineering Limited 2001 2009 gear b o x They a r e d i ...
Страница 84: ...PAGE 84 Copyright Hewland Engineering Limited 2001 2008 19th July 2004 ...
Страница 85: ...PAGE 85 Copyright Hewland Engineering Limited 2001 2009 25th January 2005 Fig 47 ...