HUB ASS'Y, R 0783171 - Caterpillar

Table 1
New 289-6342 Piston Pump Gp    
Effectivity    Speed Sensing Pressure
Specification    
226B (S/N: MJH7776-UP)
242B (S/N: BXM3254-UP)
247B (S/N: MTL3923-UP)
257B (S/N: SLK5830-UP)    
2150 150 kPa (312 22 psi)
Engine Speed is 2550 25 RPM.    The specification for the speed sensing pressure on machines with the former 233-5649 Piston Pump Gp is 2610 50 kPa (379 7 psi) at 2800 10 RPM. See Table 2.
Table 2
Former 233-5649 Piston Pump Gp    
Effectivity    Speed Sensing Pressure
Specification    
226B (S/N: MJH1-7775)
242B (S/N: BXM1-3253)
247B (S/N: MTL1-3922)
257B (S/N: SLK1-5829)    
2610 50 kPa (379 7 psi)
Engine Speed is 2800 10 RPM.    The specification for the speed sensing pressure on machines that are updated with the new 289-6342 Piston Pump Gp is 2150 150 kPa (312 22 psi) at 2550 25 RPM. See Table 3.
Table 3
New 289-6342 Piston Pump Gp    
Adaptability    Speed Sensing Pressure
Specification    
226B (S/N: MJH1-7775)
242B (S/N: BXM1-3253)
247B (S/N: MTL1-3922)
257B (S/N: SLK1-5829)    
2150 150 kPa (312 22 psi)
Engine Speed is 2550 25 RPM.