SPRING 4J3555 - Caterpillar

Engine: C-9 (S/N: CLJ1-UP) C7 (S/N: JRA1-UP; JTF1-UP; RMF1-UP)Industrial Engine: C9 INDUSTRIAL (S/N: JSC1-UP; MBD1-UP)Introduction
The purpose of this Special Instruction is to replace the existing magnetic switch group with a more robust magnetic switch group that will withstand high vibration over longer periods of time.Safety Information
Do not operate or work on this engine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manual. Failure to follow the instructions or heed the warnings could result in injury or death. Contact any Caterpillar dealer for replacement manuals. Proper care is your responsibility.
Accidental engine starting can cause injury or death to personnel working on the equipment.To avoid accidental engine starting, disconnect the battery cable from the negative (−) battery terminal. Completely tape all metal surfaces of the disconnected battery cable end in order to prevent contact with other metal surfaces which could activate the engine electrical system.Place a Do Not Operate tag at the Start/Stop switch location to inform personnel that the equipment is being worked on.
New 24V 233-0081 Heater Wiring Group for C7 Engines with Serial Number Prefixes JTF and JRA
Table 1
New Parts Required for Rework    
Callout     Quantity     Part Number     Description    
6     3     357-3513     Bolt M8 x 40 mm    
7     3     267-4211     Spacer 15mm    
8     1     398-0940     Magnetic Switch Gp 24V    
9     1     415-7171     Cable As    
10     1     397-6079     Plate    
12     1     3S-2093     Cable Strap    Parts to be Removed from the Existing 233-0081 Heater Wiring Group
Table 2
Parts to Remove    
Callout     Quantity     Part Number     Description    
1
Retain for rework.     2     208-9277     Bolt M6 x 20mm    
2     1     209-5582     Magnetic Switch Gp 24V    
3     1     231-1223     Cable As    
4     2     208-9283     Bolt M8 x 30mm    
5     1     283-1224     Bracket As    
Illustration 1 g03365378
New 233-0081 Air Inlet Heater Magnetic Switch Orientation