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Old 09-02-2014, 11:55 AM
BDBENZ's Avatar
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B1 Piston Install

I am having a great deal of difficulty installing the B1 piston, cannot compress it enough to install the snap ring. This a 722.4 transmission in a 93 300E 2.8. Yesterday i pulled the front pump and checked to make sure the brake band was installed correctly and retried to compress the piston, and broke the bolt on the installer tool. I ordered a new bolt today and hope to try again this weekend. I am going to back out the overload protection valve on the opposite side to see if this will allow a little more room. Any other preferred method? I could use any idea or proper procedure to help.

Thanks, Bill

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Old 09-02-2014, 01:36 PM
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Usually takes 3 hands to do it in the car. Get a helper.
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Old 09-02-2014, 10:22 PM
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Old 09-03-2014, 02:30 AM
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There might not be enough space on a 722.4 but I've used cut up yoghurt pots (thin but stiff bits of plastic) to help ease piston seals past grooves before.

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