SEAL-O-RING 0951685 - Caterpillar

Engine: 3606 (S/N: 8RB1-UP) 3608 (S/N: 6MC1-UP) 3612 (S/N: 9RC1-UP) 3616 (S/N: 1PD1-UP)Introduction
New electronic controls, when used in conjunction with hydra-electrical actuators, can provide many advantages over 3161 governors:
superior engine control
longer useful life
better reliabilityThese advantages result in lower operating costs to the customer. Many requests for upgrade information have been received by Caterpillar Large Engine Center. The purpose of this article is to provide the information necessary to perform a successful upgrade from a marine 3161 governor to a 723PLUS with a UG actuator.Reference: Service Manual, RENR2228, "723PLUS Digital Speed Control"Reference: Systems Operation Testing and Adjusting, SENR3028, "Caterpillar 3161 Governor"Reference: Service Manual, RENR1338, "UG Actuator"Reference: Disassembly and Assembly, SENR3594, "3612 and 3616 Engines", "Governor Drive - Assemble"Reference: Disassembly and Assembly, SENR3600, "3606 and 3608 Engines", "Disassemble and Assemble Governor Drive"Required Parts
Table 1
Parts Required for the Conversion of Either In-line Engines or Vee Engines    
Part Number     Description     Quantity    
4W-3938     Gasket (for Universal Governor (UG) Actuator)     1    
5S-7433     Plug (for Mag Pickup)     2    
8L-4171     Speed Sensor (for Mag Pickup)     2    
116-4592     Connector Plug (for UG Actuator)     1    
138-4139     UG Actuator     1    
140-0996     Transmitter - 4 Bar Transducer (for throttle and boost pressure sensors)     2    
165-4615     Governor Control (723PLUS Digital Speed Control     1    
Table 2
Additional Parts Required for Conversion of In-line Engines    
Part Number     Description     Quantity    
0T-0573     Bolt (for UG Actuator)     4    
9Y-1027     Governor Drive Pinion (1)     1    
9Y-1026     Bevel Gear     1    
( 1 ) Part required to convert 2W-1243 Governor Drive Pinion Assembly to 1W-0607 Governor Drive Pinion Assembly
Table 3
Additional Parts Required for the Conversion of In-line Engines    
Part Number     Description     Quantity    
7W-3596     Pinion     1    
137-1382     Gear     1    
Table 4
Miscellaneous Parts Needed for Terminal Strip    
Part Number     Description     Quantity    
114-1142     Circuit Breaker     1    
9X-9615     Single Terminal     17    
125-9969     Rail     1    
9X-9616     End Cover     2    
9X-9675     End Bracket     2    
3E-5503     Fixed Bridge Bar     2    
109-6539     Separator Plate     2    
146-6775     Terminal Marker     4    Mounting Instructions
Illustration 1 g00808317
723PLUS Digital Speed Control (1) Ground stud (A) 415.8 mm (16.37 inch) (B) 314.2 mm (12.37 inch) (C) 277.6 mm (10.93 inch) (D) 50.8 mm (2.00 inch) (E) 285.8 mm (11.25 inch) (F) 50.8 mm (2.00 inch) (G) 196.3 mm (7.73 inch) (H) 365 mm (14.37 inch)The 165-4615 Governor Control (723PLUS Digital Speed Control) should be mounted in a waterproof panel. Refer to Service Manual, RENR2228, "723PLUS Digital Speed Control", "Installation" for location considerations.The two 140-0996 Transmitters (4 Bar Transducer) can be mounted in the following locations:
in the same panel as the 723PLUS
on the back or the side