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| transmissions:722.3 [2022/07/08 04:32] – [K1 Accumulator] john5788 | transmissions:722.3 [2022/11/14 03:17] – [Secondary Valve Body] john5788 | ||
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| - | ===== K1 / K2 Accumulators ===== | ||
| - | The K1 and K2 accumulators are located inside of the lower valve body behind covers which are easily accessible with the transmission pan removed. | ||
| - | \\ | ||
| - | < | ||
| - | <col sm=" | ||
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| - | <panel type=" | ||
| - | ^ Part number ^ Description ^ | ||
| - | | 126 270 03 35 | K1 Accumulator Kit, spring and piston | | ||
| - | | 126 270 44 77 | K1 Spring Kit, springs only, stiffer spring | | ||
| - | | 126 270 04 35 | K2 Accumulator Kit, springs and piston, 21.60mm piston | | ||
| - | | 126 270 05 35 | K2 Accumulator Kit, springs and piston, 19.80mm piston | | ||
| - | </ | ||
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| - | </ | ||
| - | </ | ||
| - | |||
| - | ==== K1 Accumulator ==== | ||
| - | |||
| - | The K1 accumulator is in charge of shifts between 2 and 3. Usually to help with shifting problems, the springs can be replaced with stiffer ones that are ordered from a Mercedes-Benz dealer. | ||
| - | |||
| - | Part number **126 270 44 77** provides only the stiffer replacement springs which mean you will need to reuse the old piston and seals. Part number **126 270 03 35** will provide a new K1 accumulator piston, seals, as well as the original springs. It is recommended to order both kits and replace the springs from **126 270 03 35** with the stiffer springs from **126 270 44 77** for reinstalling into the valve body. | ||
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| - | {{ parts: | ||
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| - | {{ parts: | ||
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| - | === Procedure === | ||
| - | < | ||
| - | <col sm=" | ||
| - | - Drain transmission fluid | ||
| - | - Remove transmission oil pan | ||
| - | - Locate K1 spring cover on valve body towards front of transmission | ||
| - | - Loosen the bottom left or right flat-head screw and remove the other 3 | ||
| - | - Rotate cover and remove spring and bore | ||
| - | - Assemble new K1 spring into existing bore | ||
| - | - Place smallest diameter spring over white plastic thrust pin | ||
| - | - Place plastic thrust pin assembly inside one end of the largest coil spring | ||
| - | - Place black cap on the other end of the largest coil spring | ||
| - | - Compress the springs together until white thrust pin is inserted into black cap | ||
| - | - Short large coil spring goes on top of black cap | ||
| - | - Insert K1 spring and close cover | ||
| - | </ | ||
| - | <col sm=" | ||
| - | < | ||
| - | {{ transmissions: | ||
| - | < | ||
| - | </ | ||
| - | </ | ||
| - | </ | ||
| - | ==== K2 Spring ==== | ||
| - | The K2 spring kit can be purchased and used to replace an existing part to help alleviate shift flares between gears 3 and 4. The part number **126 270 05 35** or **126 270 04 35** can be used at a Mercedes-Benz dealer for ordering a replacement kit. It is unclear what the differences between the two spring kits are (aside from different piston colors), but there are unconfirmed claims that the part number **126 270 05 35** is a stiffer spring. This kit comes with a new piston and seal. | ||
| - | \\ | ||
| - | In the EPC, these parts are listed for a 722.4 transmission, | ||
| - | |||
| - | === Procedure === | ||
| - | |||
| - | < | ||
| - | <col sm=" | ||
| - | - Drain transmission fluid | ||
| - | - Remove transmission oil pan | ||
| - | - [[ transmissions: | ||
| - | - Locate K2 spring cover on valve body towards rear of transmission | ||
| - | - Loosen the bottom left or right flat-head screw and remove the other 3 | ||
| - | - Rotate cover and remove spring and bore | ||
| - | - Insert new K2 spring and bore | ||
| - | - Close cover | ||
| - | </ | ||
| - | <col sm=" | ||
| - | < | ||
| - | {{ transmissions: | ||
| - | < | ||
| - | </ | ||
| - | </ | ||
| - | <col sm=" | ||
| - | < | ||
| - | {{ transmissions: | ||
| - | < | ||
| - | </ | ||
| - | </ | ||
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| - | </ | ||
| ===== B2 Piston ===== | ===== B2 Piston ===== | ||
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| === Removal === | === Removal === | ||
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| < | < | ||
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| </ | </ | ||
| + | === Disassembly === | ||
| + | |||
| + | |||
| + | |||
| + | === Reassembly === | ||
| === Installation === | === Installation === | ||
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| - | - Remove | + | - Remove |
| - Remove bracket and detent leaf spring, 1x 10mm hex bolt | - Remove bracket and detent leaf spring, 1x 10mm hex bolt | ||
| - Remove bolts securing lower cover to transmission case, 9x 10mm hex bolts | - Remove bolts securing lower cover to transmission case, 9x 10mm hex bolts | ||
| - | - Pull lower cover along with large intermediate plate away from transmission | + | - Pull secondary valve body along with large intermediate plate away from transmission |
| - Oil deflector piece may fall out from front side of transmission after intermediate plate is removed | - Oil deflector piece may fall out from front side of transmission after intermediate plate is removed | ||
| </ | </ | ||
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| {{ transmissions: | {{ transmissions: | ||
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| {{ transmissions: | {{ transmissions: | ||
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| {{ transmissions: | {{ transmissions: | ||
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| {{ transmissions: | {{ transmissions: | ||
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| + | </ | ||
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| + | < | ||
| + | {{ transmissions: | ||
| + | < | ||
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| - Clean transmission case of any pieces of the old gasket | - Clean transmission case of any pieces of the old gasket | ||
| - Install oil deflector if it was removed | - Install oil deflector if it was removed | ||
| - | - Mount lower cover with intermediate plate against transmission case while aligning oil pipe | + | - Mount secondary valve body with intermediate plate against transmission case while aligning oil pipe |
| - Secure bolts holding lower cover to transmission case, 9x 10mm hex bolts, torque to 8 Nm | - Secure bolts holding lower cover to transmission case, 9x 10mm hex bolts, torque to 8 Nm | ||
| - Mount detent leaf spring and bracket | - Mount detent leaf spring and bracket | ||
| Line 659: | Line 574: | ||
| </ | </ | ||
| </ | </ | ||
| + | |||
| + | === Screen filters === | ||
| + | Some valve bodies are equipped with 2 small screen filters which can become clogged and cause shifting problems. | ||
| + | |||
| + | < | ||
| + | <col sm=" | ||
| + | < | ||
| + | {{ parts: | ||
| + | < | ||
| + | </ | ||
| + | </ | ||
| + | <col sm=" | ||
| + | < | ||
| + | {{ transmissions: | ||
| + | < | ||
| + | </ | ||
| + | </ | ||
| + | </ | ||
| + | |||
| + | |||
| + | ==== K1 / K2 Accumulators ==== | ||
| + | |||
| + | The K1 and K2 accumulators are located inside of the lower valve body behind covers which are easily accessible with the transmission pan removed. | ||
| + | |||
| + | \\ | ||
| + | |||
| + | < | ||
| + | <col sm=" | ||
| + | |||
| + | <panel type=" | ||
| + | ^ Part number ^ Description ^ | ||
| + | | 126 270 03 35 | K1 Accumulator Kit, spring and piston | | ||
| + | | 126 270 44 77 | K1 Spring Kit, springs only, stiffer spring | | ||
| + | | 126 270 04 35 | K2 Accumulator Kit, springs and piston, 21.60mm piston | | ||
| + | | 126 270 05 35 | K2 Accumulator Kit, springs and piston, 19.80mm piston | | ||
| + | </ | ||
| + | |||
| + | </ | ||
| + | </ | ||
| + | |||
| + | === K1 Accumulator === | ||
| + | |||
| + | The K1 accumulator is in charge of shifts between 2 and 3. Usually to help with shifting problems, the springs can be replaced with stiffer ones that are ordered from a Mercedes-Benz dealer. | ||
| + | |||
| + | Part number **126 270 44 77** provides only the stiffer replacement springs which mean you will need to reuse the old piston and seals. Part number **126 270 03 35** will provide a new K1 accumulator piston, seals, as well as the original springs. It is recommended to order both kits and replace the springs from **126 270 03 35** with the stiffer springs from **126 270 44 77** for reinstalling into the valve body. | ||
| + | |||
| + | \\ | ||
| + | |||
| + | < | ||
| + | <col sm=" | ||
| + | < | ||
| + | {{ parts: | ||
| + | < | ||
| + | </ | ||
| + | </ | ||
| + | <col sm=" | ||
| + | < | ||
| + | {{ parts: | ||
| + | < | ||
| + | </ | ||
| + | </ | ||
| + | </ | ||
| + | |||
| + | == Procedure == | ||
| + | < | ||
| + | <col sm=" | ||
| + | - Drain transmission fluid | ||
| + | - Remove transmission oil pan | ||
| + | - Locate K1 spring cover on valve body towards front of transmission | ||
| + | - Loosen the bottom left or right flat-head screw and remove the other 3 | ||
| + | - Rotate cover and remove spring and bore | ||
| + | - Assemble new K1 spring into existing bore | ||
| + | - Place smallest diameter spring over white plastic thrust pin | ||
| + | - Place plastic thrust pin assembly inside one end of the largest coil spring | ||
| + | - Place black cap on the other end of the largest coil spring | ||
| + | - Compress the springs together until white thrust pin is inserted into black cap | ||
| + | - Short large coil spring goes on top of black cap | ||
| + | - Insert K1 spring and close cover | ||
| + | </ | ||
| + | <col sm=" | ||
| + | < | ||
| + | {{ transmissions: | ||
| + | < | ||
| + | </ | ||
| + | </ | ||
| + | </ | ||
| + | |||
| + | === K2 Accumulator === | ||
| + | |||
| + | The K2 spring kit can be purchased and used to replace an existing part to help alleviate shift flares between gears 3 and 4. The part number **126 270 04 35** or **126 270 05 35** can be used at a Mercedes-Benz dealer for ordering a replacement kit. **126 270 04 35** has a 21.6 mm piston lip diameter and **126 270 05 35** has a 19.8 mm piston lip diameter. Be sure to order the matching piston size for your valve body. | ||
| + | |||
| + | \\ | ||
| + | In the EPC, these parts are listed for a 722.4 transmission, | ||
| + | |||
| + | == Procedure == | ||
| + | < | ||
| + | <col sm=" | ||
| + | - Drain transmission fluid | ||
| + | - Remove transmission oil pan | ||
| + | - [[ transmissions: | ||
| + | - Locate K2 spring cover on valve body towards rear of transmission | ||
| + | - Loosen the bottom left or right flat-head screw and remove the other 3 | ||
| + | - Rotate cover and remove spring and bore | ||
| + | - Insert new K2 spring and bore | ||
| + | - Close cover | ||
| + | </ | ||
| + | <col sm=" | ||
| + | < | ||
| + | <col sm=" | ||
| + | < | ||
| + | {{ transmissions: | ||
| + | < | ||
| + | </ | ||
| + | </ | ||
| + | <col sm=" | ||
| + | < | ||
| + | {{ transmissions: | ||
| + | < | ||
| + | </ | ||
| + | </ | ||
| + | <col sm=" | ||
| + | < | ||
| + | {{ parts: | ||
| + | < | ||
| + | </ | ||
| + | </ | ||
| + | </ | ||
| + | </ | ||
| + | </ | ||
| + | |||
| + | === B1 Accumulator === | ||
| ===== Kickdown Solenoid ===== | ===== Kickdown Solenoid ===== | ||