18
Figure 3–1. Converter Position Measurements
3–3. INSTALLING PARKING BRAKE AND OUTPUT FLANGE
• 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).
• 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.
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.
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.
TRANSMISSION
HOUSING
TRANSMISSION
HOUSING
SPACER OR
SPACER AND
RETAINER
CONVERTER
AT 540
AT 542 SERIES
AT 545 SERIES
AT 1500 SERIES
AT 543
LUG
Measure over
retainer and/or
spacer
Measure
over lug
V03007
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