KMT STREAMLINE S50, Руководство по эксплуатации и обслуживанию

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Section 6
Hydraulic System
20479283
8-2009/Rev 01
6-2
The main system relief valve provides system protection by monitoring the oil pressure entering
the manifold. If the hydraulic pressure exceeds 3,407 psi (235 bar), the valve opens to limit the
pressure. The valve is factory calibrated and is not serviceable. A drain line from the valve
prevents oil from collecting behind the relief valve to ensure a constant pressure under all
operating conditions.
The hydraulic system operates at high or low pressure settings up to the maximum flow capacity
of the hydraulic pump. The high and low limit compensators mounted on the pump regulate the
flow of hydraulic fluid to maintain constant operating pressures. Operating pressures are set and
adjusted at the high and low pressure control valves on the manifold.
The high and low limit compensators regulate the flow of hydraulic fluid to the
system by controlling the angle of the swashplate. If the oil is not properly
maintained, the compensators can become blocked with debris. As a result, pump
control will be lost and you will not be able to create hydraulic oil pressure.
The normally closed, two pressure solenoid valve is controlled by the operator’s selection of high
or low pressure. The valve is closed while operating in high pressure and is open during low
pressure operation. A light on the solenoid connector indicates low pressure operation.
A reference gauge on the front of the machine displays hydraulic pressure to the intensifiers.
When the intensifier shifts, it is normal for the pressure to quickly fall and then rise again.
The 4-way directional control valve directs pressurized oil to one end the hydraulic cylinder and
returns fluid to the reservoir from the opposite end, causing the intensifier to stroke. The
movement is controlled hydraulically by a pilot valve that is electronically operated by two
solenoids. Indicators light up as each solenoid is energized.
The directional control valve sends flow to the hydraulic cylinder in one direction until the
hydraulic piston activates the proximity switch at the end of the stroke. The activated switch
sends a signal to the customer-supplied controller to reverse the direction of flow. The piston
then moves in the opposite direction until it activates the proximity switch at the opposite end of
the stroke.
6.3 Service and Maintenance Procedures
The extreme duty cycles demanded of the hydraulic system make routine inspection and
maintenance acutely important. Leaks must be detected and remedied as soon as possible.
The operating pressure settings must be checked daily, and the electric motor must be inspected at
regular intervals. The procedures for servicing these components are detailed below.
NOTE
Refer to Section 11, Parts List for a complete listing of replacement parts and part
numbers.