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2001 Nissan Maxima Master Cylinder Circuits

Tiny
DBCAUGUST
  • MEMBER
  • 2001 NISSAN MAXIMA
Brakes problem
2001 Nissan Maxima 6 cyl Two Wheel Drive Automatic 92k miles

Just did a front brake job on 2001 maxima and noticed very little fluid coming out of the bleeder screw on front driver side, but normal flow on passenger side.

I know there are 2 "circuits" in the master cylinder.

Does one circuit control (ie provide fluid) to a front and rear wheel? I was under the impression that one circuit controlled both fronts wheels and the other controlled both rear wheels, but I may be wrong. Can someone clarify?
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Monday, September 13th, 2010 AT 9:47 AM

1 Reply

Tiny
BLUELIGHTNIN6
  • MECHANIC
  • 16,542 POSTS
Low pressure on one brake line can indicate a clogged or failed brake line, not necessarily a bad master cylinder. The master cylinder is actually 2 cylinders inside. This is so that if one set of brakes fail you will still have 2 brakes. The 2 lines from the cylinder go to a valve, then 4 lines from that valve go to each wheel.
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Tuesday, September 28th, 2010 AT 7:23 PM

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