Nissan Maxima QX

since 1993 release

Repair and operation of the car



Nissan Maxima QX
+ Cars of the Nissan Maxima brand
+ Maintenance instruction
+ Settings and routine maintenance
+ Engine
+ Cooling systems, heating
+ Power supply system and release
+ Engine electric equipment
+ Control systems of the engine
+ Transmission
- Coupling and power shafts
   General information
   Coupling - the general information and check of a condition of components
   Removal and installation of the main cylinder of coupling
   Removal and installation of the executive cylinder of coupling
   Removal of air from a hydraulic path of the drive of switching off of coupling
   Removal, check of a state and installation of components of assembly of coupling
   Removal, check of a state and installation of the release bearing and lever of switching off of coupling
   Adjustment of a pedal of coupling
   Check of serviceability of functioning and replacement of the sensor switch of disconnection of a chain of a starter
   Power shafts - the general information and check of a state
   Removal and installation of power shafts
   Check of a state and replacement of assembly of the basic bearing
   Replacement of protective covers and check of a condition of CV JOINTS
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment


Coupling - the general information and check of a condition of components

Coupling assembly components

1 — the Nut (8 ÷ 11 Nanometers)
2 — the Main cylinder
3 — the Nut (16 ÷ 22 Nanometers)
4 — the Bolt of fastening of a basic arm of a pedal
5 — the Bolt of fastening of an emphasis of a pedal
6 — the Sensor switch of disconnection of a chain of a starter (12 ÷ 15 Nanometers)
7 — the Nut of a fixing bolt (16 ÷ 22 Nanometers)
8 — the Returnable spring
9 — the Pin
10 — a pedal Axis

11 — the Forelock
12 — a coupling pedal
13 — the Executive cylinder
14 — the Conducted disk
15 — Assembly of a basket of coupling (press a disk)
16 — the Bolt (30 ÷ 40 Nanometers)
17 — the Air gate (6 ÷ 10 Nanometers)
18 — the coupling switching off Lever
19 — the Hydraulic hose
20 — the Release bearing


On all models equipped with RKPP one-disk coupling of dry type with a diaphragm spring is used. The nave of the frictional (conducted) clutch plate is equipped with the longitudinal vents entering gearing with vents of a pin of a main shaft of transmission. Frictional and press clutch plates keep in contact with each other due to the effort developed by a diaphragm spring of a press disk.

Switching off of coupling is made in the hydraulic way. The drive of switching off consists of a pedal of the coupling equipped with the tank of the main hydraulic cylinder, connecting lines and the executive cylinder, making impact on the coupling switching off lever and the release bearing.

When squeezing a pedal in a path of system the hydraulic pressure which resulting influence is put to the external end of the lever of switching off of coupling rises. At turn of the lever, fingers of its shaft rest against the release bearing which, in turn, being displaced, nestles on petals of a diaphragm spring of a press disk in a coupling basket. Being curved, the spring interrupts contact of the press and conducted disks, releasing the last.

At coupling service, besides replacement of the components having obvious mechanical damages it is necessary to make some primary checks (it is supposed that the transmission is in good repair):

a) First of all it is necessary to make sure of correctness of adjustment of a free wheeling and height of installation of a pedal of coupling, - in case of need make the corresponding adjustments (see the Section Adjustment of a Pedal of Coupling).
b) Estimate liquid level in the tank of the main hydraulic cylinder of coupling (see the Head Nastroyki and routine maintenance). In case of need make adjustment, having added the required amount of hydraulic liquid, and attentively examine system on existence of signs of leaks (see the Sections Removal and installation of the main cylinder of coupling and Removal and installation of the executive cylinder of coupling). At emptying of the tank of the main cylinder it is necessary to remove from a hydraulic path air traffic jams (see the Section Removal of Air from a hydraulic path of the drive of switching off of coupling), then to check serviceability of functioning of coupling;
c) For assessment of time of switching of coupling start the engine on normal turns of idling. Make sure that neutral transfer is included and release a coupling pedal. Now squeeze out a pedal of coupling and, having waited for several seconds, turn on the reverse gear. Switching should not lead to emergence of a gnash and other extraneous noises, with high degree of probability indicating malfunction of the conducted disk or assembly of a basket of coupling;
d) For check of completeness of switching off of coupling cock the parking brake and start the engine. Holding a coupling pedal at the height about 13 mm over a floor, a popereklyuchayta a box between the first and back transfers. Existence of hindrances when switching the lever speaks about malfunction of components of the mechanism of switching off. Estimate the size of the course of a pusher of the executive cylinder of coupling. At completely squeezed out pedal the pusher has to move forward at a noticeable size, otherwise it is necessary to check the level of hydraulic liquid in the main cylinder;
e) Make visual check of a condition of axial plugs in the top part of a pedal of coupling. Make sure of lack of signs of jamming and an excessive side play of an axis;
f) Having got under the car, make sure of durability of landing of the lever of switching off of coupling on a spherical finger of a spherical support.