SEAL-O-RING 9J0818 - Caterpillar

Backhoe Loader:
All Track-Type Loader:
All Track-Type Tractor:
All Wheel Loader:
All Small Wheel LoadersService Magazine SEPD0888, 14 May 2007, "New Torque Specifications for the Orifice Plug in the Implement Control Valve". Disregard this article. See the article that follows.Description of Change: The torque specification has changed for the orifice plug that is installed in the load sensing implement control valve. The new torque specification will reduce the possibility that the orifice plug will loosen. A loose orifice plug can cause damage to the implement control valve and the hydraulic system.This article has been rewritten to include all parts, listed in table 1 at the specified location. Some of these parts are called orifices, some are called orifice plugs, and some are called pipe plugs. All parts, at this location should be tightened to the following specification.Adaptable To:
Illustration 1 g01375361
(1) Location of the orifice plug
Table 1
Effective Parts    
Part Number    Description    
3D-4603     Pipe Plug    
4D-0514     Pipe Plug    
4J-9780     Orifice Plug    
4T-4207     Orifice Plug    
6L-9716     Pipe Plug    
7Y-4224     Orifice    
9J-8126     Orifice Plug    
171-3258     Orifice    The new tightening specification for the orifice plug has been changed to 10 +4/-1 N m (90 +35/-9 lb in). When rebuilding or repairing a control valve that uses this orifice plug, install the plug by using the new 10 +4/-1 N m (90 +35/-9 lb in) tightening specification.The new tightening specifications are effective with the following machines:
D6T (S/N: JHB141-UP; DJG251-UP; WCG329-UP; WFH271-UP; GCT151-UP; LAY409-UP)
D8T (S/N: J8B1130-UP; KPZ1958-UP)
D9R (S/N: WDM772-UP)
D9T (S/N: RJS839-UP)