SFWR GP-A4016 3436962 - Caterpillar

Illustration 1 g01428621
Cross section of clutch pack (A) 5.43 0.17 mm (0.214 0.007 inch) (1) End of the bolt on seal ring carrier (2) End of the clutch shaftWhen a transmission is assembled, you must check the dimension between the end of the clutch shaft and the bolt on seal ring carrier. The check must be done on all rotating clutch shafts that have the bolt on seal ring carriers.After the roller bearing is installed on the shaft, the dimension from the end of the shaft to the end of the bearing should measure 5.43 0.17 mm (0.214 0.007 inch). Maximum clearance between the end face of the shaft and the end of the seal ring carrier should be no more than 0.55 mm (0.022 inch).This 0.55 mm (0.022 inch) max dimension can be easily checked by bolting a short length of solder between the seal carrier and clutch shaft. Then measure the thickness of the compressed solder.Incorrect clearance is caused by improper assembly or parts that are out of tolerance. Too much clearance will cause the 8F-3469 O-Ring Seals to become dislodged. Excessive leakage in the system forms once the O-ring seals are dislodged. The O-ring seals will then move into the oil passage. This excessive leakage in the system causes low clutch pressure. The root cause of the dislodging of the O-ring seals is many times overlooked. If the problem is not corrected a clutch failure will occur.