Nissan Frontier D22. Manual - part 118

CONTROL VALVE UPPER BODY

AT-441

[RE4R01A]

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VALVE SPRINGS

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Measure free length and outer diameter of each valve spring. Also check for damage or deformation.

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Replace valve springs if deformed or fatigued.

CONTROL VALVES

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Check sliding surfaces of valves, sleeves and plugs.

Assembly

ECS007PN

1.

Lubricate the control valve body and all valves with ATF. Install
control valves by sliding them carefully into their bores.

●

Be careful not to scratch or damage valve body.

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Wrap a small screwdriver with vinyl tape and use it to insert
the valves into proper position.

Pressure regulator valve

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If pressure regulator plug is not centered properly, sleeve cannot
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.

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.

2.

Install parallel pins and retainer plates.

Inspection standard

: Refer to 

AT-497, "Return 

Springs"

 .

SAT830A

SAT831A

SAT832A

SAT833A

SAT834A

AT-442

[RE4R01A]

CONTROL VALVE UPPER BODY

●

While pushing plug, install parallel pin.

4-2 sequence valve and relay valve

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Push 4-2 sequence valve and relay valve with wire wrapped in
vinyl tape to prevent scratching valve body. Install parallel pins.

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Insert retainer plate while pushing spring.

SAT823A

SAT835A

SAT836A

CONTROL VALVE LOWER BODY

AT-443

[RE4R01A]

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CONTROL VALVE LOWER BODY

PFP:31713

Components

ECS007PO

Apply ATF to all components before their installation.
Numbers preceding valve springs correspond with those shown in 

AT-497, "Return Springs"

 9.

SAT966I

AT-444

[RE4R01A]

CONTROL VALVE LOWER BODY

Disassembly

ECS007PP

1.

Remove valves at parallel pins.

2.

Remove valves at retainer plates.
For removal procedures, refer to “DISASSEMBLY” of control
valve upper body.

Inspection

ECS007PQ

VALVE SPRINGS

●

 Check each valve spring for damage or deformation. Also mea-
sure free length and outer diameter.

●

Replace valve springs if deformed or fatigued.

CONTROL VALVES

●

Check sliding surfaces of control valves, sleeves and plugs for damage.

Assembly

ECS007PR

●

Install control valves.
For installation procedures, refer to 

AT-478, "ASSEMBLY"

 .

SAT838A

Inspection standard

: Refer to 

AT-497, "Return 

Springs"

 .

SAT829A

SAT838A