Nissan 240SX - Automatic Transmission (Section AT) (2000 year). Instruction - part 15
SAT043B
d.
Remove manual shaft from transmission case.
SAT934A
e.
Remove spacer and detent spring from transmission case.
SAT044B
f.
Remove oil seal from transmission case.
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DISASSEMBLY
AT-225
Oil Pump
COMPONENTS
NMAT0112
SAT648AB
SAT649A
DISASSEMBLY
NMAT0113
1.
Loosen bolts in numerical order and remove oil pump cover.
SAT650A
2.
Remove rotor, vane rings and vanes.
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Inscribe a mark on back of rotor for identification of fore-
aft direction when reassembling rotor. Then remove rotor.
SAT651A
3.
While pushing on cam ring remove pivot pin.
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Be careful not to scratch oil pump housing.
REPAIR FOR COMPONENT PARTS
Oil Pump
AT-226
SAT652A
4.
While holding cam ring and spring lift out cam ring spring.
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Be careful not to damage oil pump housing.
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Hold cam ring spring to prevent it from jumping.
SAT653A
5.
Remove cam ring and cam ring spring from oil pump housing.
SAT654A
6.
Remove pivot pin from control piston and remove control pis-
ton assembly.
SAT655A
7.
Remove oil seal from oil pump housing.
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Be careful not to scratch oil pump housing.
SAT656A
INSPECTION
NMAT0114
Oil Pump Cover, Rotor, Vanes, Control Piston, Side
Seals, Cam Ring and Friction Ring
NMAT0114S01
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Check for wear or damage.
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REPAIR FOR COMPONENT PARTS
Oil Pump (Cont’d)
AT-227
SAT657A
SAT658A
Side Clearances
NMAT0114S02
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Measure side clearances between end of oil pump housing
and cam ring, rotor, vanes and control piston. Measure in at
least four places along their circumferences. Maximum mea-
sured values should be within specified positions.
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Before measurement, check that friction rings, O-ring,
control piston side seals and cam ring spring are
removed.
Standard clearance (Cam ring, rotor, vanes and control
piston):
Refer to SDS, AT-292.
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If not within standard clearance, replace oil pump assembly
except oil pump cover assembly.
Seal Ring Clearance
NMAT0114S03
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Measure clearance between seal ring and ring groove.
Standard clearance:
0.10 - 0.25 mm (0.0039 - 0.0098 in)
Wear limit:
0.25 mm (0.0098 in)
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If not within wear limit, replace oil pump cover assembly.
SAT081EA
ASSEMBLY
NMAT0115
1.
Drive oil seal into oil pump housing.
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Apply ATF to outer periphery and lip surface.
SAT654A
2.
Install cam ring in oil pump housing by the following
a.
Install side seal on control piston.
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Pay attention to its direction — Black surface goes toward
control piston.
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Apply petroleum jelly to side seal.
b.
Install control piston on oil pump.
SAT660A
c.
Install O-ring and friction ring on cam ring.
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Apply petroleum jelly to O-ring.
REPAIR FOR COMPONENT PARTS
Oil Pump (Cont’d)
AT-228
SAT661A
d.
Assemble cam ring, cam ring spring and spring seat. Install
spring by pushing it against pump housing.
SAT651A
e.
While pushing on cam ring install pivot pin.
SAT662A
3.
Install rotor, vanes and vane rings.
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Pay attention to direction of rotor.
SAT649A
4.
Install oil pump housing and oil pump cover.
a.
Wrap masking tape around splines of oil pump cover assem-
bly to protect seal. Position oil pump cover assembly in oil
pump housing assembly, then remove masking tape.
b.
Tighten bolts in a criss-cross pattern.
SAT663A
5.
Install new seal rings carefully after packing ring grooves with
petroleum jelly. Press rings down into jelly to a close fit.
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Seal rings come in two different diameters. Check fit care-
fully in each groove.
Small dia. seal ring:
No mark
Large dia. seal ring:
Yellow mark in area shown by arrow
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Do not spread gap of seal ring excessively while install-
ing. It may deform ring.
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REPAIR FOR COMPONENT PARTS
Oil Pump (Cont’d)
AT-229
Control Valve Assembly
COMPONENTS
NMAT0116
SAT156K
REPAIR FOR COMPONENT PARTS
Control Valve Assembly
AT-230
SAT194B
DISASSEMBLY
NMAT0117
1.
Remove solenoids.
a.
Remove torque converter clutch solenoid valve and side plate
from lower body.
b.
Remove O-ring from solenoid.
SAT667A
c.
Remove line pressure solenoid valve from upper body.
d.
Remove O-ring from solenoid.
SAT043G
e.
Remove 3-unit solenoid assembly from upper body.
f.
Remove O-rings from solenoids.
SAT195B
2.
Disassemble upper and lower bodies.
a.
Place upper body facedown, and remove bolts, reamer bolts
and support plates.
b.
Remove lower body, separator plate as a unit from upper body.
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Be careful not to drop pilot filter, orifice check valve,
spring and steel balls.
SAT670A
c.
Place lower body facedown, and remove separator plate.
d.
Remove pilot filter, orifice check valve and orifice check spring.
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REPAIR FOR COMPONENT PARTS
Control Valve Assembly (Cont’d)
AT-231
SAT671A
e.
Check to see that steel balls are properly positioned in upper
body. Then remove them from upper body.
SAT672A
INSPECTION
NMAT0118
Lower and Upper Bodies
NMAT0118S01
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Check to see that there are pins and retainer plates in lower
body.
SAT673A
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Check to see that there are pins and retainer plates in upper
body.
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Be careful not to lose these parts.
SAT674A
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Check to make sure that oil circuits are clean and free from
damage.
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Check tube brackets and tube connectors for damage.
SAT675A
Separator Plate
NMAT0118S02
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Make sure that separator plate is free of damage and not
deformed and oil holes are clean.
REPAIR FOR COMPONENT PARTS
Control Valve Assembly (Cont’d)
AT-232
SAT676A
Pilot Filter
NMAT0118S03
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Check to make sure that filter is not clogged or damaged.
SAT149G
Torque Converter Clutch Solenoid Valve
NMAT0118S04
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Check that filter is not clogged or damaged.
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Measure resistance. Refer to “Component Inspection”, AT-120.
Line Pressure Solenoid Valve
NMAT0118S05
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Check that filter is not clogged or damaged.
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Measure resistance. Refer to “Component Inspection”, AT-136.
SAT095B
3-Unit Solenoid Assembly (Overrun Clutch Solenoid
Valve and Shift Solenoid Valves A and B)
NMAT0118S06
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Measure resistance of each solenoid. Refer to “Component
Inspection”, AT-106, AT-111, AT-116.
SAT196B
A/T Fluid Temperature Sensor
NMAT0118S07
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Measure resistance. Refer to “Component Inspection”, AT-125.
SAT671A
ASSEMBLY
NMAT0119
1.
Install upper and lower bodies.
a.
Place oil circuit of upper body face up. Install steel balls in their
proper positions.
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REPAIR FOR COMPONENT PARTS
Control Valve Assembly (Cont’d)
AT-233
SAT681A
b.
Install reamer bolts from bottom of upper body.
SAT682A
c.
Place oil circuit of lower body face up. Install orifice check
spring, orifice check valve and pilot filter.
SAT197B
d.
Install lower separator plate on lower body.
e.
Install and temporarily tighten support plates, A/T fluid tem-
perature sensor and tube brackets.
SAT198B
f.
Temporarily assemble lower and upper bodies, using reamer
bolt as a guide.
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Be careful not to dislocate or drop steel balls, orifice
check spring, orifice check valve and pilot filter.
REPAIR FOR COMPONENT PARTS
Control Valve Assembly (Cont’d)
AT-234
SAT199BA
g.
Install and temporarily tighten bolts and tube brackets in their
proper locations.
Bolt length and location:
Bolt symbol
a
b
c
d
Bolt length mm (in)
70 (2.76)
50 (1.97)
33 (1.30)
27 (1.06)
SAT200B
2.
Install solenoids.
a.
Attach O-ring and install torque converter clutch solenoid valve
and side plates onto lower body.
SAT150G
b.
Attach O-rings and install 3-unit solenoids assembly onto
upper body.
c.
Attach O-ring and install line pressure solenoid valve onto
upper body.
3.
Tighten all bolts.
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REPAIR FOR COMPONENT PARTS
Control Valve Assembly (Cont’d)
AT-235
Control Valve Upper Body
COMPONENTS
NMAT0120
SAT142JA
Apply ATF to all components before their installation.
Numbers preceding valve springs correspond with those shown in SDS on page AT-289.
REPAIR FOR COMPONENT PARTS
Control Valve Upper Body
AT-236
SAT834A
DISASSEMBLY
NMAT0121
1.
Remove valves at parallel pins.
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Do not use a magnetic hand.
SAT822A
a.
Use a wire paper clip to push out parallel pins.
SAT823A
b.
Remove parallel pins while pressing their corresponding plugs
and sleeves.
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Remove plug slowly to prevent internal parts from jump-
ing out.
SAT824A
c.
Place mating surface of valve facedown, and remove internal
parts.
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If a valve is hard to remove, place valve body facedown
and lightly tap it with a soft hammer.
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Be careful not to drop or damage valves and sleeves.
SAT825A
2.
Remove valves at retainer plates.
a.
Pry out retainer plate with wire paper clip.
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REPAIR FOR COMPONENT PARTS
Control Valve Upper Body (Cont’d)
AT-237
SAT826A
b.
Remove retainer plates while holding spring.
SAT827A
c.
Place mating surface of valve facedown, and remove internal
parts.
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If a valve is hard to remove, lightly tap valve body with a
soft hammer.
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Be careful not to drop or damage valves, sleeves, etc.
SAT828A
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4-2 sequence valve and relay valve are located far back in
upper body. If they are hard to remove, carefully push them out
using stiff wire.
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Be careful not to scratch sliding surface of valve with wire.
SAT829A
INSPECTION
NMAT0122
Valve Springs
NMAT0122S01
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Measure free length and outer diameter of each valve spring.
Also check for damage or deformation.
Inspection standard:
Refer to SDS, AT-289.
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Replace valve springs if deformed or fatigued.
Control Valves
NMAT0122S02
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Check sliding surfaces of valves, sleeves and plugs.
SAT830A
ASSEMBLY
NMAT0123
1.
Lubricate the control valve body and all valves with ATF. Install
control valves by sliding them carefully into their bores.
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Be careful not to scratch or damage valve body.
REPAIR FOR COMPONENT PARTS
Control Valve Upper Body (Cont’d)
AT-238
SAT831A
I
Wrap a small screwdriver with vinyl tape and use it to insert the
valves into proper position.
SAT832A
Pressure regulator valve
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If pressure regulator plug is not centered properly, sleeve can-
not be inserted into bore in upper body. If this happens, use
vinyl tape wrapped screwdriver to center sleeve until it can be
inserted.
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Turn sleeve slightly while installing.
SAT833A
Accumulator control plug
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Align protrusion of accumulator control sleeve with notch in
plug.
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Align parallel pin groove in plug with parallel pin, and install
accumulator control valve.
SAT834A
2.
Install parallel pins and retainer plates.
SAT823A
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While pushing plug, install parallel pin.
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REPAIR FOR COMPONENT PARTS
Control Valve Upper Body (Cont’d)
AT-239
SAT835A
4-2 sequence valve and relay valve
I
Push 4-2 sequence valve and relay valve with wire wrapped in
vinyl tape to prevent scratching valve body. Install parallel pins.
SAT836A
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Insert retainer plate while pushing spring.
REPAIR FOR COMPONENT PARTS
Control Valve Upper Body (Cont’d)
AT-240
