WASHER 4550728 - Caterpillar

Illustration 1 g02453457
Illustration 2 g02453459
The current torque specification for the 138-3816 Bolts (1) have been improved to 170 +/- 13 N m (125.4 lb ft) from 150 +/- 15 N m (110.6 lb ft). The 138-3816 Bolts are part of the 125-9358 (2) and 155-5600 Drive Shafts (3) .The new torque specification and yoke thread depth improvement is effective in production on the following machines:
Table 1
950H     S/N:N1A4526-UP    
S/N:M1G2289-UP
S/N:J5J1683-UP
S/N:K5K3389-UP
962H     S/N:N4A2165-UP    
S/N:M3G768-UP
S/N:K6K544-UP
966H     S/N:A6D2829-UP    
S/N:A6G5750-UP
S/N:A6J1891-UP
972H     S/N:A7D1112-UP    
S/N:A7G2237-UP
IT62H     S/N:M5G661-UP    The new torque specification and yoke thread depth improvement should be implemented on these machines in the field:
Table 2
950H     S/N:N1A1-3355,4000-4525    
S/N:M1G1-2288
S/N:J5J143-1197,1501-1682
S/N:K5K1-3388
962H     S/N:N4A1-1286,2000-2164    
S/N:M3G1-767
S/N:J6J1-327,501-531
S/N:K6K1-543
966H     S/N:A6D1-2828    
S/N:A6G1-4059,5000-5749,5818-5818
S/N:A6J1-1632,1801-1890
972H     S/N:WLA1-9    
S/N:A7D1-1111
S/N:A7G1-1312,2000-2236
S/N:A7J1-406,501-502
IT62H     S/N:M5G1-478,600-660    Table 3 shows the yoke assemblies that have improved thread depths to the bolts that hold the below yoke assemblies to the drive shaft.
Table 3
Part Number    Part Name    
117-4465     Yoke As    
134-3032     Yoke As    
155-5602     Yoke    
155-5606     Yoke    
156-1150     Yoke As    
179-3185     Brake Yoke    
191-1831     Yoke