NISSAN TERRANO 2002 Service Repair Manual

Control Valve Lower Body
Apply ATF to all components before their installation.
Numbers preceding valve springs correspond with those shown in SDS on page AT-197.SAT112GA
REPAIR FOR COMPONENT PARTS
AT-149

DISASSEMBLY
1. Remove valves at parallel pins.
2. Remove valves at retainer plates.
For removal procedures, refer to ªDISASSEMBLYº of Control
Valve Upper Body.
INSPECTION
Valve springs
ICheck each valve spring for damage or deformation. Also mea-
sure free length and outer diameter.
Inspection standard:
Refer to SDS, AT-197.
IReplace valve springs if deformed or fatigued.
Control valves
ICheck sliding surfaces of control valves, sleeves and plugs for
damage.
ASSEMBLY
IInstall control valves.
For installation procedures, refer to ªASSEMBLYº of Control
Valve Upper Body, AT-146.
SAT838A
SAT829A
SAT838A
REPAIR FOR COMPONENT PARTS
Control Valve Lower Body (Cont'd)
AT-150

Reverse Clutch
DISASSEMBLY
1. Check operation of reverse clutch.
a. Install seal ring onto oil pump cover and install reverse clutch.
Apply compressed air to oil hole.
b. Check to see that retaining plate moves to snap ring.
c. If retaining plate does not contact snap ring,
ID-ring might be damaged.
IOil seal might be damaged.
IFluid might be leaking past piston check ball.
2. Remove drive plates, driven plates, retaining plate, dish plate
and snap ring.
NAT296
SAT841A
SAT842A
REPAIR FOR COMPONENT PARTS
AT-151

3. Remove snap ring from clutch drum while compressing clutch
springs.
IDo not expand snap ring excessively.
4. Remove spring retainer and return spring.
5. Install seal ring onto oil pump cover and install reverse clutch
drum. While holding piston, gradually apply compressed air to
oil hole until piston is removed.
IDo not apply compressed air abruptly.
6. Remove D-ring and oil seal from piston.
INSPECTION
Reverse clutch snap ring and spring retainer
ICheck for deformation, fatigue or damage.
Reverse clutch return springs
ICheck for deformation or damage. Also measure free length
and outside diameter.
Inspection standard:
Refer to SDS, AT-197.
Reverse clutch drive plates
ICheck facing for burns, cracks or damage.
IMeasure thickness of facing.
Thickness of drive plate:
Standard value: 1.90 - 2.05 mm (0.0748 - 0.0807 in)
Wear limit: 1.80 mm (0.0709 in)
IIf not within wear limit, replace.
Reverse clutch dish plate
ICheck for deformation or damage.
NAT297
SAT844A
SAT829A
SAT845A
REPAIR FOR COMPONENT PARTS
Reverse Clutch (Cont'd)
AT-152

Reverse clutch piston
IShake piston to assure that balls are not seized.
IApply compressed air to check ball oil hole opposite the return
spring. Make sure there is no air leakage.
IAlso apply compressed air to oil hole on return spring side to
assure that air leaks past ball.
ASSEMBLY
1. Install D-ring and oil seal on piston.
IApply ATF to both parts.
2. Install piston assembly by turning it slowly and evenly.
IApply ATF to inner surface of drum.
3. Install return springs and spring retainer.
4. Install snap ring while compressing clutch springs.
SAT846A
SAT847A
SAT848A
SAT849A
NAT297
REPAIR FOR COMPONENT PARTS
Reverse Clutch (Cont'd)
AT-153

IDo not align snap ring gap with spring retainer stopper.
5. Install drive plates, driven plates, retaining plate and dish plate.
6. Install snap ring.
7. Measure clearance between retaining plate and snap ring. If
not within allowable limit, select proper retaining plate.
Specified clearance:
Standard
0.5 - 0.8 mm (0.020 - 0.031 in)
Allowable limit
1.2 mm (0.047 in)
Retaining plate:
Refer to SDS, AT-198.
8. Check operation of reverse clutch.
Refer to ªDISASSEMBLYº of Reverse Clutch, AT-151.
SAT850A
SAT842A
SAT852A
SAT841A
REPAIR FOR COMPONENT PARTS
Reverse Clutch (Cont'd)
AT-154

High Clutch
DISASSEMBLY AND ASSEMBLY
Service procedures for high clutch are essentially the same as
those for reverse clutch, with the following exception:
ICheck of high clutch operation
NAT299
SAT853A
SAT854A
REPAIR FOR COMPONENT PARTS
AT-155

IRemoval and installation of return spring
IInspection of high clutch return springs
Inspection standard:
Refer to SDS, AT-197.
IInspection of high clutch drive plate
Thickness of drive plate:
Standard
1.52 - 1.67 mm (0.0598 - 0.0657 in)
Wear limit
1.40 mm (0.0551 in)
IMeasurement of clearance between retaining plate and snap
ring
Specified clearance:
Standard
1.8 - 2.2 mm (0.071 - 0.087 in)
Allowable limit
3.2 mm (0.126 in)
Retaining plate:
Refer to SDS, AT-198.
NAT300
SAT829A
SAT845A
SAT858A
REPAIR FOR COMPONENT PARTS
High Clutch (Cont'd)
AT-156

Forward and Overrun Clutches
NAT301
REPAIR FOR COMPONENT PARTS
AT-157

DISASSEMBLY AND ASSEMBLY
Forward and overrun clutches are serviced essentially the same
way as reverse clutch is serviced. However, note the following
exceptions.
ICheck of forward clutch operation.
ICheck of overrun clutch operation.
IRemoval of forward clutch drum
Remove forward clutch drum from transmission case by hold-
ing snap ring.
IRemoval of forward clutch and overrun clutch pistons
1. While holding overrun clutch piston, gradually apply com-
pressed air to oil hole.
2. Remove overrun clutch from forward clutch.
SAT860A
SAT861A
SAT865A
SAT862A
SAT863A
REPAIR FOR COMPONENT PARTS
Forward and Overrun Clutches (Cont'd)
AT-158