Sterlco SMS Series Single Shaft Shredder - Manual (Page 56)

GRN4-605 Chapter 5: Maintenance 56 of 93
NOTE: Overheating of the oil and dirt in the oil will cause damage to the hydraulic
system if the oil is not replaced in the specified amount of time. This can lead to
complete standstill of the machine.
The same type of oil must be used when adding hydraulic oil. If the same type of oil is
unavailable or if it is unknown, then the oil in the tank and the entire hydraulic system has to
be removed and carefully and completely flushed. The system may only be filled with new
oil after this procedure has been done because it is necessary in preventing the valves from
gumming.
Checking and Adjusting of the Hydraulic System (see figure below)
1. Start the machine in automatic running mode and wait for approximately 20
minutes.
2. When the ram moves forward the pressure gauge (1) should indicate 0 – 30 bars
depends on the adjustment of the throttle check valves (2). (Also adjust the
speed of the ram with this valve.)
3. When the ram moves backwards the pressure gauge (1) should indicate 0 – 30
bars depends on the adjustment of the throttle check valves (2).
4. The pressure gauge (1) should indicate 50 – 70 bar at the change over point of the
hydraulic cylinders other wise the spill over hand wheel (3) should be adjusted.
5. The pressure gauge (4) should indicate a maximum of 2.5 MPa other wise the
screw of the sequence valve (5) has to be adjusted.
6. The ram should run upwards in less than 10 seconds, otherwise the throttle check
valve (2) has to be adjusted.
7. When pressure gauge at the oil filter (6) indicates >5 bar, the filter should be
replaced.