SHAFT-WATER PUMP 2W7255 - Caterpillar

Engine: 3516B (S/N:: 2FW1-UP) 3516BHD (S/N:: CBN1-UP) 3516 (S/N:: 73Z1-UP)Introduction
The following procedures cover the required steps in order to install the 282-3251 Rework Kit to a 7W-7919 Inner Base . The following procedures are applicable to standard production Caterpillar 3516, 3516B, or 3516BHD series petroleum gensets. The information in this document applies to petroleum gensets that use free standing, two bearing generators on a 7W-7919 inner base only when used in offshore applications at 1200 rpm.The use of the 282-3251 Rework Kit and the procedures will add:
an additional torque tube assembly
reinforcement to the generator
reinforcement to the engine mountings
an additional stiffener spring to the rear isolator mountThese procedures require a large number of critical welds that are to be made, therefore:
An AWS D1.1 certified welder is required do all of the welding.
All welds are required to be needle peened.
All weld segments need to be started and finished near the center of a straight section and not at the corners.
All procedures must be done by certified personnel, coordinated with the oil rig safety officer, and preformed in accordance with the appropriate marine and insurance certification regulations.
Illustration 1 g01215646
Inner Base Rails Before and After ModificationsParts List
Table 1
282-3251 Rework Kit    
Quantity     Part Number     Description    
8     281-4689     Plate    
4     (281-4690)     Plate    
4     281-4691     Plate    
1     (281-4694)     Tube    
2     (281-4695)     Tube    
1     281-4696     Tube    
1     281-4697     Plate    
2     281-5589     Brace Assembly    
1     281-5591     Plate    
4     281-5592     Plate    
4     281-5593     Plate    
2     282-3520     Brace Assembly    
1     282-3741     Spring    
   
Reference Drawings    
1     281-4684     Brace Assembly    
1     (281-4692)     Brace Assembly    
1     281-4693     Tube Assembly    
1     282-0789     Brace Assembly    Engine Preparation
Note: This preparation applies to all machines and engines with electronic controls. Also, this is the procedure to use for the service or storage of a machine.Proper welding procedures are necessary in order to avoid damage to electronic controls. The following steps should be complied with when welding on any machine or engine with electronic controls.
Turn off the engine and place the key start switch in the OFF position.
Disconnect the negative battery cable at the battery. Or, if the machine or engine has a battery disconnect switch, then, turn the switch to the Open position.
Connect the welder ground cable directly to the actual machine that is to be welded.Note: Place the welder ground cable clamp as close as possible to the location where a weld is to be done in order to reduce the possibility of welding current damage to the generator bearings or electrical components like ECM's and other machine components.Note: DO NOT USE ELECTRICAL COMPONENTS LIKE ECM'S and SENSORS or ELECTRONIC COMPONENT GROUND POINTS FOR GROUNDING THE WELDER.
Protect any of the wiring