SWITCH AS-PRESSURE 8T8640 - Caterpillar

Engine:
3512C (S/N: T3R1-UP; T3S1-UP; T3W1-UP)
3516C (S/N: TKS1-UP; TKY1-UP)
Description of Change: The new coupling assembly provides a better seal at the joint for the heat exchanger elbow and jacket water tube. The coupling assembly provides superior clamping force against high jacket water pressure.Adaptable To: The 423-2808 Coupling As replaces the 7L-3201 Tube Joint on the engines that are listed above.The 423-2808 Coupling As is adaptable to the above engines back to first production. Effectivity is listed in Table 1.
Table 1
Sales Model    Effective Serial Numbers    
3512C HD     S/N:T3P1-UP
S/N:T3R223-UP
S/N:T3S202-UP
S/N:T3W202-UP
S/N:T3Y1-UP
S/N:TKP1-UP    
3516C HD     S/N:TKG1-UP
S/N:TKJ1-UP
S/N:TKK1-UP
S/N:TKR1-UP
S/N:TKS214-UP
S/N:TKT1-UP
S/N:TKX1-UP
S/N:TKY208-UP    
The new parts required for installation are listed in Table 2.
Table 2
Qty    New Parts    
2     110-7753 O-Ring Seal    
2     423-2808 Coupling As    
Illustration 1 g03343047
Typical heat exchanger (1) 423-2808 Coupling As Note: New 110-7753 O-Ring Seals are provided along with coupling assembly (1) for the reinstallation of the tube assembly.Tighten the coupling assembly ... 12 N m (9 lb ft)