Nissan X-Trail 32. Manual — part 2073

TM-250

< SYSTEM DESCRIPTION >

[CVT: RE0F10D]

STRUCTURE AND OPERATION

The lubrication oil is the same as the CVT fluid which lubricates the entire transaxle.

TRANSAXLE : Oil Pressure System

INFOID:0000000010622447

Oil pressure required for operation of the transaxle transmission mechanism is generated by oil pump, oil
pressure control valve, solenoid valve, etc.

JSDIA2427GB

JSDIA3786GB

STRUCTURE AND OPERATION

TM-251

< SYSTEM DESCRIPTION >

[CVT: RE0F10D]

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TRANSAXLE : Component Description

INFOID:0000000010622448

FLUID COOLER & FLUID WARMER SYSTEM

Part name

Function

Torque converter

Increases engine torque and transmits it to the transaxle.

Oil pump

Utilizes a vane-type oil pump that is driven by the engine through the oil pump drive chain in order to
increase efficiency of pump discharge volume in low-speed zone and optimize pump discharge volume
in high-speed zone. Discharged oil from oil pump is transmitted to control valve. It is used as the oil of
primary and secondary pulley operation, the oil of clutch operation, and the lubricant for each part.

Forward clutch

The forward clutch is wet and multiple plate type clutch that consists of clutch drum, piston, drive plate,
and driven plate. It is a clutch to move the vehicle forward by activating piston hydraulically, engaging
plates, and directly connecting sun gear and input shaft.

Reverse brake

The reverse brake is a wet multiple-plate type brake that consists of transaxle case, piston, drive plate,
and driven plate. It is a brake to move the vehicle in reverse by activating piston hydraulically, engaging
plates, and fixing planetary gear.

Internal gear

The internal gear is directly connected to forward clutch drum. It is a gear that moves the outer edge of
pinion planet of planet carrier. It transmits power to move the vehicle in reverse when the planet carrier
is fixed.

Planet carrier

Composed of a carrier, pinion planet, and pinion shaft. This gear fixes and releases the planet carrier in
order to switch between forward and reverse driving.

Sun gear

Sun gear is a set part with planet carrier and internal gear. It transmits transmitted force to primary fixed
sheave. It rotates in forward or reverse direction according to activation of either forward clutch or re-
verse brake.

Input shaft

The input shaft is directly connected to forward clutch drum and transmits traction force from torque con-
verter. In shaft center, there are holes for hydraulic distribution to primary pulley and hydraulic distribution
for lockup ON/OFF.

Primary pulley

It is composed of a pair of pulleys (the groove width is changed freely in the axial direction) and the steel
belt. The groove width changes according to wrapping radius of steel belt and pulley from low status to
overdrive status continuously with non-step. It is controlled with the oil pressures of primary pulley and
secondary pulley.

Secondary pulley

Steel belt

Manual shaft

When the manual shaft is in the P position, the parking rod that is linked to the manual shaft rotates the
parking pole. When the parking pole rotates, it engages with the parking gear, fixing the parking gear. As
a result, the secondary pulley that is integrated with the parking gear is fixed.

Parking rod

Parking pawl

Parking gear

Output gear

The deceleration gears are composed of 2 stages: primary deceleration (output gear, idler gear pair) and
secondary deceleration (reduction gear, final gear pair). All of these gears are helical gears.

Idler gear

Reduction gear

Differential

Torque converter regulator
valve

Adjusts the feed pressure to the torque converter to the optimum pressure corresponding to the driving
condition.

Pressure regulator valve

Adjusts the discharge pressure from the oil pump to the optimum pressure (line pressure) corresponding
to the driving condition.

Torque converter clutch
control valve

Adjusts the torque converter engage and disengage pressures.

Manual valve

Distributes the clutch operation pressure to each circuit according to the selector lever position.

Secondary reducing valve

Reduces line pressure and adjusts secondary pressure.

Primary reducing valve

Reduces line pressure and adjusts primary pressure.

Pilot valve A

Reduces line pressure and adjusts pilot pressure to the solenoid valves listed below.
• Primary pressure solenoid valve
• Secondary pressure solenoid valve
• Select solenoid valve
• Line pressure solenoid valve

Pilot valve B

Reduces pilot pressure and adjusts pilot pressure to the torque converter clutch solenoid valve.

TM-252

< SYSTEM DESCRIPTION >

[CVT: RE0F10D]

STRUCTURE AND OPERATION

FLUID COOLER & FLUID WARMER SYSTEM : System Description

INFOID:0000000010622449

CVT FLUID COOLER SCHEMATIC

MR20DD Models

QR25DE Models

COMPONENT DESCRIPTION

CVT Oil Warmer

• The CVT oil warmer

is installed on the front part of transaxle assembly.

- MR20DD models

JSDIA5253GB

JSDIA5025GB

JSDIA5059ZZ

STRUCTURE AND OPERATION

TM-253

< SYSTEM DESCRIPTION >

[CVT: RE0F10D]

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- QR25DE models

• When engine is started while engine and CVT are cold, engine coolant temperature rises more quickly than

CVT fluid temperature. CVT oil warmer is provided with two circuits for CVT and engine coolant respectively
so that warmed engine coolant warms CVT quickly. This helps shorten CVT warming up time, improving fuel
economy.

• A cooling effect is obtained when CVT fluid temperature is high.

Heater Thermostat

• The heater thermostat

is installed on the front part of transaxle assembly.

- MR20DD models

- QR25DE models

• The heater thermostat open and close with set temperature.

CVT Fluid Cooler (Air Cooling Type)

• The CVT fluid cooler (air cooling type) is installed to the vehicle

front.

• CVT fluid is cooled by driving blast while driving the vehicle.

SHIFT LOCK SYSTEM

JSDIA4001ZZ

JSDIA5254ZZ

JSDIA4004ZZ

JSDIA5577GB