0337530 JOHNSON PLUG, Screen

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PSP FOR INSTALLING A NEW GUIDE TUBE FOR THE OIL LEVEL GAUGE GROUP ON CERTAIN D11N TRACTORS AND 3508 ENGINES - PS4338 - MAI LED US AND CANADA, COFA, COSA, LIMITED CACO
  The information supplied in this service letter may not be valid after the termination date of this program.   Do not perform the work outlined in this Service Letter after the termination date without first contacting your Caterpillar product analyst.
U-109 A-79.1 AU-75 O-70 1326 PS4338 This Program can be administered either before or after a failure. In either case the decision whether to apply the Program is made by the dealer. When reporting the repair, use "PS4338" as Part Number, "7755" as Group Number, and "96" as Description Code. Termination Date
May 31, 1991
Problem
A section of the guide tube located in the oil pan may break off at the mounting flange on certain D11N Tractors and 3508 Engines. If the tube does break off an inaccurate oil level reading may result.
Affected Product
Model Identification Number ***** Group 1 ***** D11N 74Z323, 326, 327, 331-390, 392-395, 397-605, 612-615 3508 99W702, 719, 778, 784, 790, 794, 797, 802, 808, 815, 861, 882, 900, 903, 905, 916, 921, 1005, 1031, 1033, 1037, 1059, 1071, 1087, 1095, 1199, 1275, 1368, 1407, 1464, 1470, 1625, 1638, If the original engine has been replaced, the parts listed in Group 2 may also be required. ***** Group 2 ***** D11N 74Z1-322, 324, 325, 328-330, 391, 396 3508 99W495, 497, 654
Parts Needed
***** Group 1 ***** 4 - 7C2199 Clamp 2 - 7C3036 Grommet 1 - 7E0595 Guide Assembly 1 - 7E0945 Gauge Assembly 1 - 1N3860 Gasket 1 - 4S7907 Gasket 1 - 6V5101 Seal 2 - 7E2634 Gasket ***** Group 2 ***** All of the parts listed for Group 1 plus the following: 1 - 396937 Bolt 1 - 7C4060 Tube 1 - 7C5694 Hasp 1 - 2D6235 Locknut 1 - 6N2206 Cap Assembly 1 - 2W0752 Gasket Group 2 parts for early engines with the long oil level gauge assembly.
Action Required
Remove the existing oil level gauge assembly. Remove the oil pan. Enlarge the oil level guide tube pilot holes in the pan from a 15 mm (.59") diameter to a 18 mm (.71") diameter. Install the new parts listed under the heading Parts Needed. Engines with the long oil level gauge assembly (gauge assembly at the same height as the oil filler assembly) will require the replacement of the oil filler assembly.
Service Claim Allowances
Product Caterpillar Dealer Suggested Customer Suggested smu/age Parts Labor Hrs. Parts Labor Hrs. Parts Labor Hrs. Whichever (D/N) (Cost) (C/L) (Sell) comes first ***** Group 1 In Chassis Repair ***** 0-4000 100% 5