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Inertia Brake
Ine
rtia Brake
High Capacity Inertia Brake Relocation - UltraShift Transmissions
Medium-Duty UltraShift Transmissions
The high capacity inertia brake is installed on the left side 6-Bolt PTO opening of all medium-duty UltraShift transmissions. Kit
K-3742 is required to move the inertia brake.
Heavy-Duty UltraShift Transmissions
The high capacity inertia brake (HCIB) is installed on the 8-Bolt PTO opening of all heavy-duty Fuller
®
UltraShift transmissions;
however, the HCIB can be moved to the 6-Bolt PTO opening if desired. Depending on the application, the HCIB can either be
directly mounted to the 6-Bolt PTO opening using Eaton Kit numbers K-3683 for Generation II transmissions, K-3739 for
Generation 3 transmissions, or can be offset with the use of an adapter from Chelsea or Muncie to clear frame and suspension
components.
Both Chelsea and Muncie have produced adapters to rotate the HCIB away from potential vehicle interferences. The Chelsea
adapter kit is 630-2 (30 degree). The Muncie adapter kit is 40TF-6855-1 (55 degree). Prior experience has shown that only the
Muncie 55 degree adapter works in the Kenworth T800 chassis, specifically with set back front axles. If ordering an UltraShift
that would require the HCIB to be relocated, please contact the vehicle OEM to ensure that the HCIB (with or without an adapter)
adequately clears any obstructions prior to purchase.
Moving I-Brake to 6-Bolt PTO Opening
For heavy-duty UltraShift Generation 2 transmissions, see “Generation 2 Inertia Brake Relocation Instructions
(8 to 6-Bolt PTO Opening).”
For heavy-duty UltraShift Generation 3 transmissions, see “Generation 3 Inertia Brake Relocation Instructions
(8 to 6-Bolt PTO Opening).”
Note:
The high capacity inertia break cannot be relocated on the FO(M)-16D313E-LEP or the RTLO(M)-16913L-DM3.
