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2–6. Rebuild, Overhaul Instructions
from Allison Transmission HT HTB CLT CLBT 700 Series Electronic Control Transmision Mechanic Tips Manual
CAUTION: The use of an impact wrench for removing the input or output nut requires a means to hold the flange. Failure to hold the flange can cause internal damage to the transmission.
• Before removing the self-locking nut, check to see if there are any notches cut into the wrenching flats. If there are five notches, remove the nut and throw it away. • If there are less than five notches or none at all, remove dirt and burrs from the shaft thread. Then loosen the nut until there is about 1⁄16 inch gap between the nut and flange. • Check the running torque as the nut is being removed. The first time the nut is removed (no notches), running torque must be at least 400 lb in. (45 N·m).
Each additional time the nut is removed (one to four notches), running torque must be at least 300 lb in. (34 N·m). Discard the nut if it does not meet the running torque limit.
2–6. REBUILD, OVERHAUL INSTRUCTIONS
Refer to the latest edition of the following Service Manuals for rebuild or overhaul of the transmission:
— HT, HTB 700 Electronic Control Series Service Manual SM2004EN — CL(B)T 700 Series Service Manual SM1314EN, with CL(B)T 755 Electronic Control Series Service Manual Supplement SM1992EN
