GEAR-RING 6T3720 - Caterpillar

On-highway Engine: C13 (S/N: LEE00815-09699) C15 (S/N: SDP00719-11499; B5R00156-00292)Introduction
Do not perform any procedure in this Special Instruction until you read this information and you understand this information.The following procedure should be performed in order to avoid the ingestion of oil into the purge system.ReferenceTroubleshooting, RENR9343, "ARD Nozzle - Test"Required Parts
Table 1
Parts List for C15 (S/N: SDP00719-06890) and C15 (S/N: B5R00156-00234)    
Quantity     Part Number     Description    
1     319-6188     Tee    
2     8T-1117     Hose Clamp    
1     247-4602     Elbow    
    5P-1442     Hose    
3     109-1145     Hose Clamp    
Table 2
Parts List for C13 (S/N: LEE05515-09699), C15 (S/N: SDP06891-11499) and C15 (S/N: B5R00235-00292)    
Quantity     Part Number     Description    
1     319-6188     Tee    
2     8T-1117     Hose Clamp    
1     9S-8004     O-Ring Plug    
1     153-4906     O-Ring Seal    
    5P-1442     Hose    
3     109-1145     Hose Clamp    
Table 3
Parts List for C13 (S/N: LEE0815-05514)    
Quantity     Part Number     Description    
1     319-6188     Tee    
2     8T-1117     Hose Clamp    
1     9S-5518     Plug    
2     109-1145     Hose Clamp    
    5P-1442     Hose    Modification Procedure
Illustration 1 g01427855
(1) Intake hose (2) 319-6188 Tee (3) Tee (4) Intake hose of the ARD purge air pump (5) Air compressor (6) Air Filter Element (7) ARD purge air pump
Cut the intake hose (1) to the air compressor. The cut must be 305 mm (12 inches) from the tee (3) .
Slide one 8T-1117 Hose Clamp above the cut and one 8T-1117 Hose Clamp below the cut.
Insert 319-6188 Tee (2) into the cut area of hose (1) that is connected to the intake of the air compressor (5). Slide the clamps into position. Tighten the clamps.
Remove the flexible hose (4). Keep the hose if Step 6.c is applicable.
Install a new 5P-1442 Hose from the inlet of the ARD purge air pump (7) onto the opening that is located on the side of the 319-6188 Tee (2). Approximately 610 mm (24 inches) of hose will be needed. This approximation depends on the location of the tee. Use new 109-1145 Hose Clamps at each end and tighten the clamps.
The open port of tee (3) must be sealed. Use one of the following procedures in order to seal the port:Note: Use the following procedure for the listed serial numbers C15 S/N:SDP719-6890 and ; S/N:B5R156-234.
Remove intake hose (1) from tee (3). Replace tee (3) with a new 247-4602 Elbow . Refer to the parts list in Table 1. Assemble intake hose (1) onto the elbow. Position the hose clamp. Tighten the hose clamp.
Illustration 2 g01433002
Tee (3) Tee with hex fitting (8) Note: Use the following procedure for the listed serial numbers C13 S/N:LEE5515-9000, C15 S/N:SDP6891-11000 and ; S/N:B5R235-266 .
Perform this step if