SEAL-O-RING 2043946 - Caterpillar

If only the transmission oil filter element is to be serviced, see the Operation & Maintenance Manual.
Do not remove or install the transmission oil filter housing with an air wrench. See the Operation & Maintenance Manual for the correct service intervals for the transmission oil filter.
1. Using tool (A), remove filter housing (2) from filter base (1). Remove the filter element from the filter housing. 2. Disconnect hose assemblies (4) and (5) from filter base (1).3. Remove three bolts (3) and the washers. Remove filter base (1) from its mounting base. The following steps are for the installation of the transmission oil filter. 4. Check the condition of the O-ring seal in filter base (1). If the seal is worn or damaged, use a new part for replacement. Put filter base (1) in position on its mounting base, and install three bolts (3) and the washers which hold it.5. Check the condition of the O-ring seals in the ends of hoses (4) and (5). If the seals are worn or damaged, use new parts for replacement.6. Connect hose assemblies (4) and (5) to filter base (1).7. Install a new filter element in the filter housing. Install the filter housing on the filter base. Be sure the filter housing is seated against the filter base.8. Check the fluid level of the transmission. See the Operation & Maintenance Manual for the correct filling procedure.Disassemble & Assemble Transmission Oil Filter
Start By:a. remove transmission oil filter 1. Remove filter housing (1) from filter base (2). 2. Remove filter element (3) from the filter housing. Remove the O-ring seal from the filter base. 3. Remove plug (7) from the bottom of the filter housing. Remove the O-ring seal from plug (7).
There is spring force against retaining ring (4) and retainer (5). When retaining ring (4) is removed, the spring force will be released. To prevent possible personal injury, retainer (5) must be held in position when retaining ring (4) is removed.
4. While holding retainer (5) in position, remove retaining ring (4). Remove retainer (5) and spring (6) from the filter housing. 5. Remove plug (8) from the filter base. Remove O-ring seal (9) from the plug.6. Remove switch (13), spool (11) and spring (10) from the filter base. Remove O-ring seal (12) from the switch. The following steps are for the assembly of the transmission oil filter. 7. Check the condition of all O-ring seals used in the transmission oil filter. If any of the seals are worn or damaged, use new parts for replacement.8. Install O-ring seal (9) and plug (8) in the filter base.9. Install spring (10), spool (11), O-ring seal (12) and switch (13) in the filter base. 10. Install the O-ring seal and plug (7) in the bottom of the filter housing.11. Put spring (6) and retainer (5) in position in the filter housing. Compress the spring with the retainer, and install retaining ring (4). 12. Put filter element (3) in the filter housing. 13. Install the O-ring