VALVE GP-SOLENOID 1169321 - Caterpillar

Do not disconnect any oil lines from the valve until all oil pressure in the main system has been released. Serious personal injury can be the result if oil pressure is permitted to come out of an open line.
1. Disconnect oil lines (3), (4), (5) and (6).2. Remove three bolts (2) from the boom check and relief valve. Remove boom check and relief valve (1). The following steps are for the installation of the boom check and relief valve.3. Put boom check and relief valve (1) in position with three bolts (2).4. Connect oil lines (3), (4), (5) and (6).Disassemble Boom Check And Relief Valve
Start By:a. remove boom check and relief valve 1. Remove plugs (1) and (2) from the valve. Remove O-ring seals from the plugs. 2. Remove spring retainer (3), spring (4), and valve (5) from the valve body.3. Remove spring (7) and valve group (11) from the valve body.4. Remove seat (8), valve (6), spring (9) an shims (10) from valve group (11). Remove O-ring seal from the seat.Assemble Boom Check And Relief Valve
1. Put shims (10), spring (9) and valve (6) in position in valve group (11), then install the seat (8). Make sure the O-ring seal is in position on seat (8).2. Install valve group (11) and spring (7) in the valve body Put a new O-ring seal on plug (2). Install plug (2) in valve body.3. Install valve (5), spring (4) and spring retainer (3) in the valve body. Put a new O-ring seal on plug (1), then install plug (1) in the valve body.End By:a. install boom vent valve b. check adjustment of relief valve (See Adjustment Of Line Relief Valves in Testing And Adjusting.