3–3 Installing Parking Brake and Output Flange

LUG Measure over lug

CONVERTER Measure over retainer and/or spacer

TRANSMISSION HOUSING

SPACER OR SPACER AND RETAINER TRANSMISSION HOUSING

AT 540 AT 542 SERIES AT 545 SERIES AT 1500 SERIES AT 543

Figure 3–1.Converter Position Measurements

3–3. INSTALLING PARKING BRAKE AND OUTPUT FLANGE

V03007

CAUTION: Do not attempt to polish the oil seal contact surface on the flange or yoke. Scratches or machine-type lead can cause seal leakage.

• Check the output flange rear oil seal to ensure that it has not been damaged and is free of defects. For replacement instructions, refer to the applicable

Allison Transmission Service Manual. Refer to Paragraph 7–2. • Lubricate the oil seal with petrolatum or transmission fluid. • Check the output flange or yoke for damage or wear. Check the oil seal contact surface to ensure it is smooth and free of surface irregularities to prevent fluid leaking past the seal. Rotate the flange during installation to avoid seal lip damage. • Install the parking brake (if so equipped). Tighten the brake mounting bolts to 81–97 lb ft (110–131 N·m).

CAUTION: Do not use a hammer or similar tool to install the output flange or yoke onto the transmission output shaft. Internal damage can result.

• Lubricate the splines of the shaft and output flange and install the output flange. Ensure the flange hub is seated against the transmission rear bearing.