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No pedal resistance means air is in clutch M/C or... Posted by walt [Email] (#2707) [Profile/Gallery] (more from walt) on Sat, 14 May 2016 06:17:42 In Reply to: Re: ANOTHER Clutch Issue...Help, Andrew86, Fri, 13 May 2016 14:39:17 Members do not see ads below this line. - Help Keep This Site Online - Signup |
a defective M/C. The reverse bleed procedure described in my Friday post should fix if there are no leaks in slave, M/C, or hydraulic line, and M/C is OK. If "New" M/C was NOS (new old stock) that sat around for years, it may be rusty internally and have torn its piston seals. There is also a spring inside M/C that can break. There also is a check valve (a thin stainless steel washer) at tip of M/C piston that could have debris trapped between it and front of piston that is holding it open which would prevent piston from developing pressure. There also is a tiny air bleed hole underneath the clutch M/C feed line fitting that could get blocked on an old M/C.
A recent $50 far East manufactured M/C had firewall mounting studs with long unthreaded sections that required washers underneath nuts to prevent M/C sliding back and forth through firewall. This caused low clutch pedal engagement with firm pedal. Same problem results from ovalled out hole in clutch pedal where M/C yoke pin attaches.
O-rings are not used at clutch hydraulic line connections. Leaks can be detected with paper towel wrapped around suspect connections, then looking for darkened areas in towel.
Also, some people when changing the BRAKE M/C reservoir or doing a auto to 5-speed tranny swap forget to open brake M/C port that feeds the clutch M/C.
posted by 72.49.15...
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