SHAFT 1L4211 - Caterpillar

Illustration 1 g00947575
Load Sensing Signal Limiter Valve (1) Locknut (2) Adjustment screw (3) Spring (4) Passage to tank (5) Poppet (6) Load sensing signal
Illustration 2 g00955958
M318C, M318C MH, M322C, and M322C MH Main Control Valve (7) Main relief valve (8) Load sensing signal limiter valve
Illustration 3 g00928161
M313C, M315C, and M316C Main Control Valve (7) Main relief valve (8) Load sensing signal limiter valveLoad sensing signal limiter valve (8) is used to limit the maximum pressure of the hydraulic system. The pressure of the hydraulic system is directly proportional to load sensing signal pressure (6) .Load sensing signal limiter valve (8) controls the maximum load sensing signal pressure (6) that is sent to the pump controls.When load sensing signal pressure (6) is higher than the pressure setting of the load sensing signal limiter valve, poppet (5) moves upward against spring (3). Load sensing signal oil (6) flows through passage (4) to the tank.Note: The M300C excavators do not have a heavy lift feature. A load sensing signal limiter valve with two stages is not required, because the maximum pressure of the hydraulic system has increased.