Control Valve Upper Body

Control Valve Upper Body

AT-273 Components (Part 1):

AT-273 Components (Part 2):

DISASSEMBLY





1. Remove valves at retainer plates.

CAUTION: Do not use a magnetic pick-up tool.





a. Use a flat-bladed screwdriver A to remove retainer plates (1).





b. Remove retainer plates (1) while holding spring, plugs (2) or sleeves using a flat-bladed screwdriver A.

CAUTION: Remove plugs (2) slowly to prevent internal parts from jumping out.





c. Place mating surface of valve body face down, and remove internal parts.

CAUTION:
^ If a valve is hard to remove, place valve body face down and lightly tap it with a soft hammer.
^ Be careful not to drop or damage valves and sleeves.

INSPECTION

Valve Springs





^ Check each valve spring for damage or deformation. Also measure free length and outer diameter. Refer to AT-343, "Control Valves". Control Valves
^ Replace valve springs if deformed or fatigued.

Control Valves
Check sliding surfaces of valves, sleeves and plugs. Replace if necessary.

ASSEMBLY

CAUTION:

^ Apply ATF to all components before installation.
^ Lay control valve body down when installing valves. Do not stand control valve body upright.





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

CAUTION:
^ Install each control valve one by one.
^ Install control valves after checking, because some of them are similar.
^ Be careful not to scratch or damage valve body.





^ Wrap a small flat-bladed screwdriver A with vinyl tape and use it to insert valves into their proper positions.





^ Install retainer plates (1).
- While pushing plug or return spring, install retainer plate (1) using a flat-bladed screwdriver A.

1-2 Accumulator Valve





^ Install 1-2 accumulator valve (1), 1-2 accumulator valve spring and plug. Align 1-2 accumulator retainer plate (2) from opposite side of control valve body.
^ Install 1-2 accumulator valve piston spring (3), 1-2 accumulator piston (4), plug (5) and retainer plate (6).

Retainer Plate (Control Valve Upper Body)
Install proper retainer plates. Refer to "COMPONENTS".