RACE AND ROLLER ASSEM. outer 2D6421 - Caterpillar

Power Module:
XQC1200 (S/N: N1G1-UP)
XQC1600 (S/N: N1M1-UP)
Description of Change: The new piston reduces carbon deposits on the piston top land.Adaptable To: The new 249-5496 Piston replaces the existing piston and is adaptable back to first production on the serial numbers listed above. Refer to Table 1 for a list of the new parts required to install the new 249-5496 Piston.
Table 1
New Part Number     Description     Quantity    
0T-0102     Bolt     XQC1200 : 12
XQC1600 : 16    
121-3558     Retainer As     XQC1200 : 12
XQC1600 : 16    
138-8508     Piston Pin     XQC1200 : 12
XQC1600 : 16    
144-5695     Piston Ring     XQC1200 : 12
XQC1600 : 16    
165-6668     Piston Ring     XQC1200 : 12
XQC1600 : 16    
1B-2790     Bolt     XQC1200 : 12
XQC1600 : 16    
207-1372     Tube As     XQC1200 : 12
XQC1600 : 16    
229-1632     Piston Ring     XQC1200 : 12
XQC1600 : 16    
249-5496     Piston     XQC1200 : 12
XQC1600 : 16    
5M-2894     Hard Washer     XQC1200 : 12
XQC1600 : 16    
8N-7296     Pin Retainer     XQC1200 : 24
XQC1600 : 32    
9M-1974     Hard Washer     XQC1200 : 12
XQC1600 : 16    This change is effective on the serial numbers listed in Table 2.
Table 2
Effective Serial Numbers    
S/N:N1G00101-UP    
S/N:N1M00500-UP