TUBE AS 4451411 - Caterpillar

Table 1
    Transmission Serial Number     Former Part Number     New Part Number    
Stage 1     1SY2038     194-3807 Clutch Housing     252-4406 Clutch Housing    
Stage 2     1SY2199     194-3809 Clutch Piston     238-5093 Piston
238-5095 Piston (Plate)    
194-3815 Clutch Piston 238-5094 Piston
238-5095 Piston (Plate) The new clutch pistons are two-piece pistons. Both new part numbers are required in order to replace the 194-3809 Clutch Piston or the 194-3815 Clutch Piston .The former 194-3809 Clutch Piston or 194-3815 Clutch Piston are still serviceable parts. The new clutch pistons will not operate correctly in the former clutch housing.Adaptable To: The new clutch housing and the newclutch pistons are adaptable to the following serial numbers:
(S/N: 7PZ1-1299)
(S/N: AAF1-262)Note: Reference Service Magazine Article, SEPD0743, "A New Planetary Group Improves the Service Life of the Transmission" for additional changes between 116-4623 Transmission Planetary Gp and 194-3806 Transmission Planetary Gp .The new clutch housing and the new clutch pistons are adaptable to the 1SY1-2198 transmission serial number.The new clutch housing and the new clutch pistons are effective with the following serial numbers:
(S/N: 7PZ1300-UP)
(S/N: AAF263-UP)The new clutch housing and the new clutch pistons are effective with the 1SY2199-UP transmission serial number.Note: The tractor may not have the corresponding transmission from the factory. Make sure that you check the transmission serial number and the part numbers on the clutch housings before you order new clutch pistons.