page 215 NISSAN PULSAR 1987 Workshop Manual

121
CLUTCH
SPECIFICATIONS
Type................................................... Single dry plate
Operation................................................... Mechanical
Pressure plate type .................................... Diaphragm
Release bearing type .......................Prelubri cated ball
Driven plate:
Outside diameter .................................... 215 mm
Rivet depth limit ....................................0.3 mm
Runout limit .........................................0.5 mm
Maximum spline backlash ...................0.7 mm
Pressure plate:
Diaphragm spring height
(installed) ...................................... 30.5-32.5 mm
Spring finger vari ation limit.....................0.5 mm
Clutch pedal:
Height .............................................. 175-185 mm
Free play ....................................... 12.5-17.5 mm
Release lever free play............................ 2.5-3.5 mm
Flywheel machining limit ...............................0.3 mm
TORQUE WRENCH SETTINGS
Pressure plate bolts.......................................... 29 Nm
Pedal pivot pin nut ......................................... 22 Nm
Cable loc knut.................................................... 4 Nm
Lower clutch housing to engine bolts.............. 21 Nm
Centre and upper clutch housing
to engine bolts .................................................. 49 Nm
1. CLUTCH TROUBLE SHOOTING
CLUTCH SLIPPING
(!) Worn driven plate facing: Check and renew
the clutch driven plate.

(2) Insufficient clutch pedal free play: Check and
adjust the clutch pedal free play. Ensure that the
release lever free play is correct.
(3) Weak or broken pressure plate diaphragm
spring: Check and renew the pressure plate assembly. (4) Worn or scored flywh eel: Machine or renew
the flywheel. Worn or scored pressure plate face: Renew the
pressure plate assembly.


Renew the clutch driven plate if the friction material is
worn down to, or is within 0.3 mm of the rivets.
NOTE: In most cases clutch slippage is first
evident by a marked increase in engine revs,
for no apparent reason, when pulling up a
steep hill. The clutch condition can be
positively diagnosed as follows: With the
handbrake firmly applied, and the rear
wheels chocked, select top gear and release
the clutch with the engine running at ap-
proximately 2 000 rpm. Clutch slippage is
evident if the engine does not stall. Make the
test as quickly as possible to prevent any
further clutch damage.

CLUTCH SHUDDER
(1) Oil on the driven plate facings: Renew the
clutch driven plate. Invest igate and rectify the source
of the oil leak.
(2) Scored pressure plate or flywheel face: Re-
new the pressure plate assembly or machine the
flywheel. (3) Loose or damaged driven plate hub: Check
and renew the clutch driven plate. (4) Loose driven plate facings: Renew the clutch
driven plate. (5) Cracked pressure plate face: Renew the pres-
sure plate assembly.