SEAL 3G9201 - Caterpillar

Petroleum Engine3512C PETROLEUM (S/N: R1A1-UP; R1S1-UP)TransmissionTH55FT-E70 (S/N: PCJ1-UP)Engine News, SEBD9894, 30, August 2013, "A New Adapter Is Used on Certain 3512C Petroleum Engines". Disregard the information in the article that is listed above. Refer to the information in the following article.Description Of Change: The new adapter has more surface area and creates a better seal.Adaptable To: The new 434-3759 Adapter replaces the 123-6905 Adapter in the above engines.The former 123-6905 Adapter is canceled.The new 434-3759 Adapter is adaptable to the above engines back to first production.This change is effective on 3 July 2013for transmissions TH55FT-E70 S/N:PCJ.This change is effective with the engine serial numbers listed in Table 1.
Table 1
Effective Serial Number
S/N:R1A01862-UP
S/N:R1S01328-UP Rework Procedure for the Flywheel Housing
The new parts required to resolve oil leak for the 123-6905 Adapter are listed in Table 2.
Table 2
New Part Part Description Qty
3B-8602 Setscrew 1
N/A Loctite® 263™ with North America 1
N/A Loctite® 270™ outside North America 1
Illustration 1 g03384409
Locate drain hole (1) in the engine flywheel housing.
Tap this hole with a 5/8 - 11 tap to a depth of at least 12.7 mm (0.5inch).
Screw a 3B-8602 Setscrew into the hole. Make sure that the setscrew is flush with the surface. The setscrew should not be above the surface.
Remove the setscrew. Apply the Loctite 263 or Loctite 270 to the setscrew.
Install the setscrew into the hole and tighten the setscrew.