PAD 2P0004 - Caterpillar

Tip Control Circuit (814)
The top of the dozer blade can be tipped either forward or back when the tractor is equipped with a tip control valve, check valves and hydraulic blade tip cylinders.The tip control valve is located in the hydraulic oil supply tank. The pump oil passes through the tilt and lift control valve, in HOLD position, to the tip control valve. The main oil pressure relief valve, on the tilt and lift control valve, protects the tip control circuit from damage that could result from excessive pump oil pressure.The left side cylinder (2) diameter is larger, by calculated amount, than the diameter of right side cylinder (3). The difference in cylinder dimensions equalizes the volume of oil in the rod