1987 NISSAN PULSAR lock

Brakes 181

chor plate to the steering knuckle and slide the caliper
off the brake disc. Suspend the caliper clear of the
work area using wire or cord.

(3) Suitably mark the location of the disc in
relation to the hub.

(4) Slide the disc off the hub. If the disc is
difficult to remove, install two M8 x 1.25 mm bolts in
the disc and by alternatively tightening the bolts,
remove the disc.

Do not use a hammer to remove the disc.
Installation is a reversal of the removal procedure
ensuring that the mating face s of the disc and hub are
clean and free from burrs and that the marks made on
removal are aligned.

To Inspect
(1) Inspect the machined faces of the disc for
scores, cracks, wear and signs of overheating. (2) Using a micrometer, measure the thickness
of the disc at several positi ons around the face of the
disc. Renew the disc if the minimum thickness is
below Specifications.

Inspect the brake discs for scoring and wear.
(3) If the disc thickness is satisfactory but the
disc is scored, machine equal amounts from the
machined face on each side of the disc, to restore the
serviceability of the disc.

NOTE: Disc machining is best entrusted to
a reliable brake specialist who can advise on
disc serviceability.

6. REAR DISC BRAKES
Special Equipment Required:
To Check Disc Runout — Dial gauge
To Check Disc Thickness — Micrometer
TO CHECK AND RENEW BRAKE PADS
( 1 ) Raise the rear of the vehicle and place it on
chassis stands. Remove the rear wheels.


Renew the rear brake pads if the friction material is less
than 2 mm thick.
(2) Inspect the brake pads on both sides of the
vehicle. If the friction material on one or more of the
pads is less than 2 mm thick or contaminated with
fluid or grease, renew the brake pad as a set as follows.

NOTE: If the brake pads are contaminated
trace and rectify the cause prior to installing
the new set of pads.

(3) Drain approximately two thirds of the brake
fluid from the master cylinder reservoir. This can be
done by loosening the bleeder valve on the caliper and
allowing the fluid to drai n into a container. Discard
this fluid.

NOTE: Do not drain all the fluid from the
reservoir otherwise it will be necessary to
bleed the hydraulic system. The fluid is
drained from the reservoir to prevent over-
flow when the caliper piston is pushed back
into the caliper bore to facilitate pad re-
newal.

(4) Remove the guide bolts and lift the caliper
body clear of the disc.

NOTE: Do not allow the caliper to hang on
the brake hose.

(5) Noting the installed positions, remove the
brake pads, shims and spring clips from the anchor
plate.
(6) Using a pair of long nosed pliers with the
nose located in the recesses of the piston, rotate the
piston clockwise to retract it into the cylinder body.
Align the recesses between the brake pad retaining
lugs on the caliper body. Refer to the illustration. (7) If necessary, check the disc runout and
thickness as described under the Brake Disc heading.
(8) Ensure that the guide bolts move freely in the
caliper body and that the dust boots are in good
condition.

Brakes 183

To Dismantle
(1) Raise the rear of the vehicle and place it on
chassis stands. Remove the relevant rear wheel.
(2) Remove the brake hose retaining bolt from
the caliper body and plug the hose to prevent the loss
of fluid and the ingress of dirt. (3) Remove the handbrake cable bracket retain-
ing bolt and disconnect the handbrake cable from the
cam lever.
(4) Remove the guide bolts and slide the caliper
body off the pads. (5) Using a pair of long nose pliers with the nose
located in the recesses of the piston, rotate the piston
anticlockwise to remove it from the caliper body.
(6) Remove the dust cover retaining clip and dust
cover. Discard the dust cover. (7) Using a thin blunt probe, preferably made
from wood or plastic, remove and discard the piston
seal from the groove in the caliper bore. (8) Using internal snap ring pliers, remove the
snap ring from the caliper bore. (9) Withdraw the spring cover, spring, key plate,
pushrod and link from the caliper bore. Do not mix
these components from the left and right hand sides as
they differ. (10) Remove and discard the O ring from the
pushrod. (11) Remove the spring, nut and washer from the
cam lever. Remove the cam lever and cam from the
caliper body. (12) Remove the cam seal from the caliper using a
screwdriver.
(13) Clean all the caliper components in methy-
lated spirits and arrange the components in order on a
clean dry surface to aid assembly.
To Inspect

(1) Inspect the caliper bore and piston for pit-
ting, wear or damage. Renew the caliper assembly or
piston if damage is evident.

NOTE: Slight rust spots in the caliper bore
may be removed with fine emery paper. The
piston must not be polished as the plated
surface will be damaged.

(2) Inspect the guide bolts for wear or damage
and renew as necessary.
(3) Inspect the threads of the pushrod for wear or
damage and renew as necessary. (4) Inspect the nut inside the piston for wear,
damage and security. Renew the piston if any damage
is evident. (5) Inspect the cam for wear, damage or pitting,
renew as necessary. (6) Inspect the cam bearing in the caliper body
for wear, damage or pitting and renew the seal and
bearing as necessary. (7) Inspect the guide bolt rubbers for deteriora-
tion, wear or damage. Renew as required. To Assemble

(1)
Lubricate the cam bearing with multipurpose
grease and install the seal. (2) Install the cam and cam lever to the
caliper
body. Install the cam lever spring, washer and nut, and
tighten the nut to the specified torque. (3) Install a new O ring to the pushrod and
install
the link, pushrod, key plate, spring and spring cover to
the caliper body. The key plate must engage the caliper
body. Secure the assembly with the snap ring. (4) Dip a new piston seal in clean hydraulic brake
fluid. Insert the seal into the groove in the caliper bore
ensuring that the seal is correctly seated and not
twisted. (5) Install a new dust cover to the piston prior
to
installing the piston to the caliper bore.
(6) Coat the piston and caliper bore with clean
hydraulic brake fluid and using long nose pliers rotate
the piston clockwise into the caliper bore. (7) Locate the dust seal in the groove of the
caliper body and install the retaining clip.
(8) Lubricate the guide bolts using a suitable
grease. Install the caliper body and tighten the guide
bolts to the specified torque. (9) Replenish the master cylinder reservoir with
the recommended fluid and bleed the brakes as
described under the Hydraulic System heading. (10) Install the rear wheel and lower the vehicle to
the ground. (11) Road test the vehicle and check for correct
brake operation.
BRAKE DISC

To Check Runout
(1) Raise the rear of the vehicle and support it on
chassis stands. Remove the relevant rear wheel.
(2) Mount a dial gauge stand to a suspension
component and position the dial gauge plunger
against the wheel hub. Check that the end float is less

Using a dial gauge to measure the rear disc runout.

Brakes 185
(6) Using a suitable pair of pliers, disengage the
upper and lower return springs from the leading shoe,
and then remove them from the trailing shoe. (7) Using a pair of pliers, compress the leading
shoe retainer, turn through ninety degrees and remove
the retainer, spring and pin. Remove the leading shoe
from the backing plate. (8) Using the same procedure, remove the trail-
ing shoe retainer. (9) Lift the trailing shoe from the backing plate
and disconnect the handbrake cable from the hand-
brake lever. Remove the trailing shoe assembly from
the backing plate.
(10) If the brake shoes are to be renewed, remove
the C clip from the trailing shoe and remove the
handbrake lever assembly. (11) If the wheel cylinder is to be overhauled,
proceed as follows:
(a) Disconnect the brake pipe from the rear of
the wheel cylinder and plug the pipe to prevent the
loss of fluid and the ingress of dirt. (b) Remove the bolts retaining the wheel cylin-
der to the backing plate and withdraw the wheel
cylinder from the vehicle. (c) Remove the rubber boots, pistons and spring
from the wheel cylinder bore. Remove the seals from
the pistons. Discard th e rubber boots and seals.
(d) Remove the rubber boot and bleeder valve
from the wheel cylinder.
TO CLEAN AND INSPECT

(1) Thoroughly clean all the brake components,
except the brake shoes in methylated spirits.
(2) Inspect the brake shoe linings. If the thick-
ness of the lining on one or more of the shoes is less
than 1.5 mm thick or contaminated with fluid or
grease, the brake shoes must be renewed as a set. (3) Inspect the wheel cylinder bore and piston
for pitting, wear or damage. Renew the wheel cylinder
assembly if any damage is evident. (4) Check the brake drums for cracks, scoring or
out of round. Renew or machine the brake drums as
necessary.
(5) Inspect the springs and handbrake lever for
fatigue and distortion. Renew as required. (6) Operate the handbrake lever and check for.
smooth operation of the handbrake cable. Renew as
required under the Hand brake Cable and Lever
Assembly heading. (7) Check the bleeder valve for blockage.
(8) Clean and lubricate the adjuster rod.
(9) Clean and inspect the backing plate for
cracks, damage and wear. Renew as required.
TO ASSEMBLE AND INSTAL

(1) If the wheel cylinder was overhauled, pro-
ceed as follows:

(a) Lubricate the pistons and seats with brake
fluid and install the seals on to the pistons so that the
l i p on the seals will be facing towards the centre of the
cylinder.
(b) Install the spring, pistons and rubber boots to
the wheel cylinder ensuring that the rubber boots are
securely located in the cy linder. If necessary, use a
clamp to hold the pistons in the cylinder.
(c) Position the wheel cylinder in the backing
plate and install the brake pi pe to the cylinder. Do not
fully tighten the pipe at this stage. (d) Install the wheel cylinder retaining bolts and
tighten the retaining bolts and brake pipe securely.
Install and tighten the bleeder valve. Install the
valve
boot.


Dismantled view of the right hand rear drum brake
components. Dismantled view of the rear wheel cylinder.

(2) Sparingly lubricate the brake shoe moving
contact surfaces on the backing plate and the adjuster
assembly with a high melting point grease.
(3) If necessary, position the adjusting lever
on
the handbrake lever. (4) If necessary, position the handbrake lever
assembly and washer on the trailing shoe and secure it
with the C clip.
(5) Ensure that the adjuster assembly is adjusted
to its shortest length. (6) Install the adjusting lever return spring to
the
trailing shoe.

Brakes 187
(b) Disengage the handbrake cable return spring
from the backing plate.

handbrake cable flange from the rear of the backing
plate and remove the cable from the vehicle.

(6) Inspect the rear handbrake cables for chafing
or broken strands. Renew the cables if damage is
evident.

Installation is a reversal of the removal procedure
with attention to the following points:

(1) Ensure that the handbrake cable clamps are
correctly installed. (2) On drum brake models, install the
handbrake
cable to the backing plate by carefully tapping the
flange on the handbrake cable. Ensure that the cable is
not damaged. (3) Adjust the handbrake cable as described
under the Brake Adjustments heading.
9. BRAKE ADJUSTMENTS

FRONT AND REAR DISC BRAKES
The disc brakes are self adjusting and no manual
adjustment is required or provided.

REAR DRUM BRAKES
Depress the handbrake lever button, apply and
release the handbrake lever several times to adjust the
rear brake shoes.

HANDBRAKE
(1) Raise the rear of the vehicle and support it
on chassis stands. (2) Remove the carpet square from the rear of
the console. Remove the retaining screws from the
front and rear of the rear console section and manoeu-
vre the rear console from the vehicle. (3) Tighten the adjusting nut until the hand-
brake lever pull is between 7-11 notches. (4) Check that the rear wheels are not binding. If
the rear wheels do not rotate freely refer to the Brakes
Trouble Shooting for possible causes.
(5) With the ignition switched On, check that
the handbrake warning lamp is extinguished when the
lever is fully released. (6) Lower the vehicle to the ground and test the
handbrake on an incline.
10. BRAKE PEDAL

TO REMOVE AND INSTAL
(1) Working inside the vehicle remove the re-
taining clip from the clevis pin and remove the clevis
pin connecting the brake pedal to the pushrod.

Dismantled view of the brake pedal components.
(2) Remove the nut from the pivot bolt and
withdraw the brake pedal pivot bolt.
(3) Maneuver the brake pedal from the mount-
ing bracket. (4) Remove the spring from the brake pedal.
(5) Inspect the return spring for breakage or
fatigue. Renew as required.
(6) Inspect the pedal pivot bolt for damage or
wear. Renew as required. (7) Inspect the brake pedal for wear, cracks or
fatigue. Renew as required. Installation is a reversal of the removal procedure
with attention to the following points:

(1) Sparingly lubricate the pedal pivot bolt and
clevis pin with a suitable grease. (2) Ensure that the brake pedal pivot bolt is
correctly located in the pedal bracket. (3) Ensure that the clevis pin is inserted fully
through the clevis and the retaining clip is correctly
installed. (4) Check and if necessary adjust the brake
pedal height and stop lamp switch as described below.
TO ADJUST PEDAL HEIGHT

The dimension for the pedal height is measured at
right angles from the floor, with the carpet pulled
back, to the centre of the pedal pad.

(1) Working inside the ve hicle, disconnect the
wiring from the stop lamp switch.
(2) Loosen the stop lamp switch locknut and
position the switch away from the brake pedal. (3) Loosen the locknut on the brake pedal push-
rod and adjust the pushrod to achieve a pedal height
of 155-165 mm on manual transaxle models or
164-174 mm on automatic transaxle models. Tighten
the locknut. (4) Adjust the stop lamp switch as described
under the following heading.

188 Brakes

Illustration showing the brake pedal adjustments. Di-
mension H = brake pedal height, Dimension C = stop
lamp switch clearance, Dimension F - brake pedal free
play.
TO ADJUST STOP LAMP SWITCH
(1) Loosen the stop lamp switch locknut and
disconnect the wiring from the switch.
(2) Adjust the stop lamp switch to achieve a
clearance of 0.3-1.0 mm between the pedal stop and
the threaded end of the switch. (3) Tighten the locknut and connect the wiring
to the switch. Ensure that the stop lamps are off when
the pedal is released.
(4) Ensure that the pedal free play is 1.0-3.00
mm after adjustments have been completed.
11. HYDRAULIC SYSTEM

TO BLEED
Bleeding the hydraulic system should only be
necessary when some portion of the hydraulic system
has been disconnected or fluid has been drained,
allowing air to enter the system.

The brake fluid in the hydraulic system should be
changed every 30 000 km or 18 months. The proce-
dure for changing the brake fluid and bleeding the
hydraulic system are simila r with attention to the
notes in the text.

There are four points in the system where bleeder
valves are installed, one on each front caliper and one
on each rear wheel cylinder or rear caliper.

14. Fill the fluid reservoir with clean hydraulic
brake fluid and maintain at least one third full
throughout the entire operation. 15. Attach a transparent hose to the bleeder
valve on the left rear cali per and immerse the other
Bleeding the right hand rear brake caliper.
end of the hose in a small amount of clean brake fluid
contained in a clean glass jar held higher than the
bleeder valve.

14. Unscrew the bleeder valve one
complete turn.
15. Have an assistant depress the brake
pedal slowly to the full extent of its travel. Close
the bleeder valve and allow the brake pedal to
r e t u r n w i t h o u t assistance. 16. Repeat operations (3) and (4) until
a con stant stream of fluid, without any air
bubbles, is being discharged into the gl ass jar,
hold the brake pedal down and tighten the
bleeder valve.
Bleeding the right hand front brake caliper.

192 Electrical System
transaxle models, check for a faulty or incorrectly
adjusted neutral safety switch.

1. Discharged battery: Check for a fault or short
circuit in the system. 2. Battery fully charged but will not crank
engine. Check for a locked drive and ring gear,
internal starter faul t or seized engine.
3. Fusible link blown: Check and repair the
cause and renew as necessary.
NOTE: Rotate the engine by hand to ensure
that the starter drive is not locked with the
flywheel ring gear and t hat the engine is not
seized. Ensure that the ignition key is
turned off before rotating the engine.

3. LIGHTING SYSTEM TROUBLE SHOOTING
LAMP OR LAMPS FAIL TO LIGHT
1. Faulty bulb(s): Check and renew the faulty
bulb(s). 2. Open circuit in the wiring or connections:
Check the lamp circuits and rectify as necessary.

1. Faulty lamp switch: Check and if necessary
renew the lamp switch. 2. Faulty fuse or fuse connection: Repair the
fuse connection or renew the fuse. 3. Lamp relay faulty: Check and renew as
necessary.
NOTE: Switch on the lamps concerned and
using a test lamp, check that the lamp
circuits are operating. This is best done by
starting at the lamp wiring connector or
bulb holder and work ing back to the power
source.

LAMP OR LAMPS INCORRECTLY
ILLUMINATED

1. Lamp or lamps incorrectly earthed: Check
the lamp earth for loosene ss or clean the contact,
either at the lamp body or wire.
2. Incorrect bulbs installe d: Check the bulb
wattage and voltage and renew with the correct type if
necessary. 3. Dirty or damaged lamp reflector: Clean or
renew the lamp reflector. 4. Faulty bulb: Check with a known serviceable
bulb and renew if necessary. 5. Dirty lamp lens: Clean or renew the lamp
lens. 6. High resistance or faulty connections be-
tween the alternator and battery: Check the circuit
and rectify th e condition.
7. Poor earth connection between the battery
and the engine or alternat or: Check the battery earth
lead and the strap between the engine and the body. 8. Voltage regulator faulty: Check and renew
the voltage regulator.
NOTE: The most common cause for this
condition is dirty t erminals on the earth
leads. Check all earth leads at their earthing
points.

4. TURN SIGNAL LAMP TROUBLE SHOOTING
TURN SIGNAL LAMP DOES NOT LIGHT AND
NO AUDIBLE NOISE FROM FLASHER UNIT

(1) Fuse blown: Rectify the fault and renew the
fuse.

(2) The Flasher unit is faulty: Renew the unit
(3) Turn signal switch faulty: Renew the switch
(4) Fault in the wiring circuit: Check and repair
the fault.

TURN SIGNAL WARNING LAMP DOES NOT
FLASH BUT AUDIBLE CLICKING FROM
FLASHER UNIT

(1) Warning lamp bulb blown: Check and renew
the bulb.

Checking the rear combination lamp circuit using a test
lamp.
Checking the headlamp circuit using a test lamp.

Electrical System 201
nosed pliers. This will safeguard the diodes
by transferring any excess heat to the jaws of
the pliers.

Using a suitable drift, install the bearing into
the drive end bracket, install the retainer plate and
screws. Tighten the screws securely. Using a suitable press and press plates, install
the bearing to the slip ring end of the rotor shaft.
Ensure that pressure is ex erted only on the inner race
and that the stop ring groove is nearest to the sl i p
rings. Ensure that the rotor sh aft rear bearing stop
ring is positioned so that the protruding part of the
ring is located in the deepest part of the groove. Install the stator, diode pack and
regulator
assembly to the slip ring e nd bracket. Install the
retaining nuts and washers and tighten securely. Install the nut and insulator to the terminal
and tighten securely. Using a piece of wire, hold the brushes in a
retracted position. Hold the drive end bracket in a soft jawed
vice and install the rotor shaft assembly to the drive
end bracket. Install the pulley, retaining nut and washer to
the rotor shaft and tighten the retaining nut to the
specified torque. Apply a heated 200 watt soldering iron to the
slip ring end bracket at the bearing mounting boss for
3-4 minutes to heat the bracket and allow the
installation of the rotor shaft rear bearing. Aligning the marks made on dismantling and
ensuring that the rotor sh aft rear bearing retaining
ring protrusion is located in the deepest part of its
groove, install the rotor/stator assembly to the slip ring
end bracket.
Remove the brush retr acting wire from the
alternator, ensure that the alternator component
marks are aligned, install the retaining through bolts
and tighten them securely. Check the alternator rotor for smooth oper-
ation and install the al ternator to the vehicle
as
previously described.
Check the alternator operation on the vehicle
as previously described.
8. STARTER MOTOR
Special Equipment Required:
To Renew Brushes — Soldering iron
To Renew Armature Bearings — Bearing puller
DESCRIPTION
Two types of starter motors are installed to the
range of vehicles covere d by this manual, either
Hitachi or Bosch.

The starter motor is the induced pole type with
four brushes and four pole shoes with field coils.

A solenoid switch is attached to the starter drive
end bracket. The solenoid plunger is connected to
the overrunning clutch and drive pinion assembly
through a lever and pivot arrangement.

When the solenoid windings are energized, the
plunger acting on the lever and pivot engages the drive
pinion with the flywheel ri ng gear and at the same
time closes the switch supplying power from the
positive lead of the battery to the starter motor field
coils and armature to operate the motor.

As the engine fires, the over-running clutch of the
drive pinion assembly prevents high speed rotation of.
and possible damage to, the starter armature if the
solenoid windings are not immediately de-energized
by releasing the ignition key.

The starter solenoid switch windings are energized
by the ignition switch.

TO TEST ON VEHICLE
Should the starter motor fail to operate when the
ignition switch is turned to the Start position, check
the following points:

Check the battery condition and state of
charge. Refer to the Battery heading for the correct
procedure.
Clean the battery terminals, taking particular
care to remove the scale from the positive ( + )
terminal post and terminal. Check the earth connection for tightness and
cleanliness.
Switch on the headlamps and turn the igni-
tion switch to Start. If the lamps dim but the starter
motor does not operate, it could indicate that a short
circuit has developed in the starting system. Check that the engine is not seized or that the
starter motor drive pinion and ring gear are not
locked as these conditions would -give the same
indications as above.

(5) If the lamps do not dim and the starter
motor does not operate, this would indicate an open
circuit such as a broken or disconnected wire or a
switch not operating.

If the vehicle is equipped with an automatic
transaxle, turn the ignition switch to Start and move
the selector lever through all the gear selection range.
If the starter motor operates in any position other
than N or P, the neutral safety switch is faulty.

(6) Check all the external wiring to ensure that
the fault is not external. If the external circuit proves
satisfactory, indicating that the problem is in the
starter motor, the unit will have to be removed and
tested.

TO REMOVE AND INSTAL
Disconnect the negative battery terminal.
Disconnect the wiring from the starter motor
solenoid. Remove the starter motor mounting bolts,

Electrical System 203
BRUSH HOLDER
Dismantled view of the Hitachi starter motor.
Check the field coil insulation using an
ohmmeter. Connect one test probe to the solenoid
cable terminal and the other test probe to the body of
the yoke. If continuity exists, renew the field coils. Check that the commutator is free from
pitting and burning. Clean the commutator with a
petrol moistened cloth and polish with a strip of fine
glass paper.
A badly worn commutator may be repaired by
mounting in a lathe and taking a light cut using a very
sharp tool with the lathe rotating at high speed. After
machining, undercut the insulation between the seg-
ments to Specifications. Do not machine the commu-
tator to below 29 mm diameter. Check the armature
gear teeth for wear and damage.

Check the armature for short circuit using an
ohmmeter. Place one of the test probes on the
armature shaft or core and move the other test probe
around the periphery of the commutator. If continuity
exists at any point, the armature is faulty and should
be renewed. Check the pinion for wear and damage. The
pinion should move smoothl y along the clutch assem-
bly helical splines. Check the spring, collar and snap
ring for serviceability.
Check that the clutch assembly locks in one
direction and rotates smoothly in the opposite direc-
tion. Check for wear and damage to the reduction gear
teeth on the outside of the clutch assembly.
Check that continuity exists between the
solenoid spade terminal and the solenoid body and
between the solenoid spade terminal and the solenoid
field coil terminal. Renew the solenoid if continuity
does not exist. Renew all the components found to be
unserviceable in the above checks.
To Assemble

Assembly is a reversal of the dismantling proce-
dure with attention to the following points:

(1) If removed, install new bearings to the clutch
assembly and the armature. Lubricate the armature
bearings with high temperature grease.

The sealed bearings on the clutch assembly are
lubricated during manufacture and further lubrication
is unnecessary.

Apply high temperature grease to the yoke
end cover bearing recess, the drive end bracket and
pinion housing bearing recesses, the clutch assembly
reduction gear teeth, the armature gear teeth, the
pinion helical splines, th e solenoid plunger and the
spring and lever. Install the pinion to the clutch assembly and
install the spring and collar to the pinion. Hold the collar down and install the snap ring
to the end of the pinion.
Position the collar over the snap ring. If
necessary, squeeze the snap ring into the groove using
multigrip pliers to enable the collar to be clipped over
the snap ring. Install the pinion and clutch assembly to the
drive end bracket.
Install the pinion housing to the drive end
bracket. Install and tighten the retaining screws
se-
curely. Check that the pinion rotates freely.
Assemble the lever and spring to the solenoid
in the position noted on dismantling.
Install the solenoid assembly and rubber seal
to the drive end bracket.
Install and tighten the solenoid retaining
bolts securely. Connect 12 volts between the solenoid spade
terminal and the solenoid field coil terminal and
measure the distance that the end of the pinion
protrudes from the pinion housing. Pull the pinion by hand until it contacts the stop
and measure the pinion end protrusion.

If necessary, add or subt ract shims between the
solenoid mounting face and the drive end bracket
until the difference between the above measurements
is 0.3-1.5 mm.

Install the armature to the yoke.
Install the brush holder to the yoke. Install
the
PLUNGER
O RING