RECTIFIER AS 2918247 - Caterpillar

Engine: Generator Set
3508 (S/N: 1ZF1-UP; 23Z1-UP; 3LS1-UP; 5PW1-UP; 5XM1-UP; 70Z1-UP; 8TL1-UP)
3508B (S/N: 2BM1-UP; 2HW1-UP; 3DM1-UP; 4GM1-UP; 5KW1-UP; 6PN1-UP; 7SM1-UP; CNB1-UP)
Vibrations have been noticed on 3508 generator sets. These vibrations are due to the present locations of the vibration isolators. In order to eliminate these vibrations, it has been determined that the mounting location of the middle isolator should be moved toward the front of the engine. Table 1 through Table 4 list the new isolator mounting locations. All dimensions are referenced from the reference points (4) shown in Illustration 1 and Illustration 2. In the tables below, positive mounting locations are on the engine side of the reference point. Negative mounting locations are on the generator side of the reference point.In addition, a welded lifting eye has been added to each rail on all 3508 generator set packages. This lifting eye (7) will assist in lifting and handling the generator set. The 123-8359 Bracket will no longer be used.Generator Sets that Use the 115-7030 Engine Support Rail
Table 1
690 Frame, SR4B, One Bearing Generator without Radiator, 115-7030 Engine Support Rail    
Front Mounting Location     +1299.3 mm (+51.15 inch)    
NEW Middle Mounting Location    
+119.2 mm (+4.69 inch)    
Rear Mounting Location    
-1099.1 mm (-43.27 inch)    
Table 2
690 Frame, SR4B, One Bearing Generator with Radiator, 115-7030 Engine Support Rail    
Front Mounting Location    
+1197.7 mm (+47.15 inch)    
NEW Middle Mounting Location    
+17.6 mm (+0.69 inch)    
Rear Mounting Location    
-1200.7 mm (-47.27 inch)    The 115-7030 Engine Support Rail includes the following parts:
115-7035 Support (RH)
115-7034 Support (LH)The isolator that is used beneath the 3508 Generator Set's base rails is the 8N-9567 Engine Flexible Mounting .The isolator that is used beneath the 3508 Generator Set's radiator is the 9Y-8234 Radiator Mounting Group .Generator Sets that Use the 121-9294 Engine Support Rail
Table 3
690 Frame, SR4B, Two Bearing Generator without Radiator, 121-9294 Engine Support Rail    
Front Mounting Location    
+1240.3 mm (+48.83 inch)    
NEW Middle Mounting Location    
+60 mm (+2.36 inch)    
Rear Mounting Location    
-1358.9 mm (-53.50 inch)    
Table 4
690 Frame, SR4B, Two Bearing Generator with Radiator, 121-9294 Engine Support Rail    
Front Mounting Location    
+1138.7 mm (+44.83 inch)    
NEW Middle Mounting Location    
-41.6 mm (-1.64 inch)    
Rear Mounting Location    
-1460.5 mm (-57.50 inch)    The 121-9294 Engine Support Rail includes the following parts:
122-0077 Support (RH)
122-0078 Support (LH)The isolator that is used beneath the 3508 Generator Set's base rails is the 8N-9567 Engine Flexible Mounting .The isolator that is used beneath the 3508 Generator Set's radiator is the 9Y-8234 Radiator Mounting Group .115-7030 Engine Support Rail - Vibration Isolator Mounting Holes
Illustration 1 g00758940
(1) Front mounting hole (Gen Sets without radiator): +1299.3 mm (+51.15 inch) (2) Front mounting hole (Gen Sets with radiator): +1197.7 mm (+47.1534 inch) (3) 115-7030 Engine Support Rail (4) Reference point (Rear face of engine block): 0.0 mm (0.00 inch) (5) Middle mounting hole (Gen sets without radiator): +119.2 mm (+4.69