SECTION H -FINAL OPERATIONS -
143
CLUTCH HYDRAULICS
PRESSURE HOSE INSTALLATION
See page 36 for an illustration of the slave cylinder.
With BMW Master Cylinder
With Tilton Master Cylinder
Check the tightness of all fittings before bleeding.
BLEEDING
The car must be level or with the front end slightly higher for
this operation
Fill the brake/clutch reservoir with DOT 3 or DOT 4 fluid.
ATE Blue or Castrol LMA brands are preferred. Silicone-
based fluid is not recommended.
Attach a small hose to the slave cylinder bleeder nipple,
emersing the other end of the hose in a small cup of fluid.
Loosen the nipple about
2
/
3
turn with a
9
/
32
" or 7 mm wrench.
Work the arm on the clutch pedal shaft (instead of pushing
on the clutch pedal itself) until only clear fluid comes out of
the hose.
Close the bleeder nipple and pump the clutch pedal several
times. If there is more than 1" travel at the pedal before
resistance is felt, repeat the bleeding procedure.
ADJUSTMENT
The slave cylinder has an internal spring that keeps a small
amount of pressure to extend the piston at all times. Most
throw-out bearings will operate with the small constant
pressure involved. Those that cannotmust use a return
spring and be adjusted periodically.
If you wish, you can use this preload to automatically keep
the clutch adjustment at “zero” clearance. This will,
however reduce the life of the throwout bearing. Since clutch
wear will be most seen when the driven disc is being broken
in, you may want to keep the “automatic mode” during the
first couple hundred miles and then install a return spring.
See page 105 for clutch pedal height adjustment.
WITHOUT RETURN SPRING
Increase the length of the throw rod by unscrewing the ball
end, forcing the piston in the cylinder to just bottom out.
Note
that the cylinder is spring loaded to the fully extended
position.
Decrease the length of the adusting rod so that there is
about
1
/
4
" movement when you push the transmission arm
toward the front of the car.
f\cltchadj
Summary of Contents for 427 ROADSTER
Page 4: ...SECTION A PARTS NEEDED 4...
Page 13: ...SECTION A PARTS NEEDED 13...
Page 55: ...55 SECTION C CHASSIS PREPARATION Assembling the chassis and preparation for paint...
Page 56: ...56...
Page 70: ...70 SECTION E BODY PREPARATION...
Page 73: ...SECTION E BODY PREPARATION 73...
Page 76: ...SECTION E BODY PREPARATION 76 ebod stripe...
Page 95: ...95 SECTION F SUSPENSION ASSEMBLY...
Page 107: ...107 SECTION G BODY INTERIOR...
Page 117: ...SECTION G BODY INTERIOR 117 eint tunnel...
Page 142: ...142 SECTION H FINAL OPERATIONS...