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transmissions:722.3 [2022/11/14 02:25] – [K2 Spring] john5788 | transmissions:722.3 [2022/11/14 03:29] (current) – [Main 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=" | ||
- | |||
- | <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=" | ||
- | < | ||
- | {{ transmissions: | ||
- | < | ||
- | </ | ||
- | </ | ||
- | <col sm=" | ||
- | < | ||
- | {{ transmissions: | ||
- | < | ||
- | </ | ||
- | </ | ||
- | |||
- | </ | ||
===== B2 Piston ===== | ===== B2 Piston ===== | ||
Line 542: | Line 446: | ||
=== Removal === | === Removal === | ||
- | |||
< | < | ||
Line 561: | Line 464: | ||
< | < | ||
</ | </ | ||
+ | </ | ||
+ | </ | ||
+ | |||
+ | === Disassembly === | ||
+ | |||
+ | |||
+ | |||
+ | === Reassembly === | ||
+ | |||
+ | < | ||
+ | <col sm=" | ||
+ | |||
+ | </ | ||
+ | <col sm=" | ||
+ | < | ||
+ | <col sm=" | ||
+ | < | ||
+ | {{ transmissions: | ||
+ | < | ||
+ | </ | ||
+ | </ | ||
+ | <col sm=" | ||
+ | < | ||
+ | {{ transmissions: | ||
+ | < | ||
+ | </ | ||
+ | </ | ||
+ | <col sm=" | ||
+ | < | ||
+ | {{ transmissions: | ||
+ | < | ||
+ | </ | ||
+ | </ | ||
+ | </ | ||
</ | </ | ||
</ | </ | ||
Line 589: | Line 526: | ||
< | < | ||
<col sm=" | <col sm=" | ||
- | - 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: | ||
- | < | + | < |
</ | </ | ||
</ | </ | ||
Line 623: | Line 560: | ||
< | < | ||
{{ transmissions: | {{ transmissions: | ||
- | < | + | < |
</ | </ | ||
</ | </ | ||
Line 629: | Line 566: | ||
< | < | ||
{{ transmissions: | {{ transmissions: | ||
- | < | + | < |
</ | </ | ||
</ | </ | ||
Line 636: | Line 573: | ||
{{ transmissions: | {{ transmissions: | ||
< | < | ||
+ | </ | ||
+ | </ | ||
+ | <col sm=" | ||
+ | < | ||
+ | {{ transmissions: | ||
+ | < | ||
</ | </ | ||
</ | </ | ||
Line 648: | Line 591: | ||
- 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 660: | Line 603: | ||
</ | </ | ||
</ | </ | ||
+ | |||
+ | === 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 ===== |