Daewoo Solar 300LC-V, Manual

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S0708315K
Page 35
Main Pump (Kawasaki)
the servo piston move to the right, reduces the pump delivery flow rate, and prevents the prime
mover from being overloaded.
The movement of the servo piston is transmitted to the feedback lever via point D. Then the
feedback lever rotates around the fulcrum of point F and the spool is shifted to the left. The
spool moves till the opening between the spool and sleeve (651) is closed.
B. Flow Reset Function
As the self pump delivery pressure P1 or the companion pump delivery pressure P2 decreases,
the compensating rod (623) is pushed back by the action of the springs (625 and 626) to rotate
Lever 1 around point E. Rotating of Lever 1 causes the feedback lever to rotate around the
fulcrum of point D and then the spool to move to the left. As a result, Port C liter opens a way to
the tank port. This causes the servo piston to move to the left and the pump's delivery rate to
increase.
The movement of the servo piston is transmitted to the spool by the action of the feedback
mechanism to move it till the opening between the spool and sleeve is closed.
2. Low tilting angle (low flow) command preferential function
As mentioned above, flow control and horsepower control tilting angle commands are transmitted to
the feedback lever and spool via the large-hole sections (C and F) of levers 1 and 2. However, since
sections C and F have the pins (
∅
4) protruding from the large hole (
∅
8), only the lever lessening the
tilting angle contacts the pin (897); the hole (
∅
8) in the lever of a larger tilting angle command is freed
without contacting the pin (897). Such a mechanical selection method permits preference of the lower
tilting angle command of the flow control and horsepower control.
3. Adjustment of Input horsepower
Since the regulator is of total cumulative horsepower type, adjust the adjusting screws of both the
front and rear pumps, when changing the horsepower set values. The pressure change values by
adjustment are based on two pumps pressurized at the same time, and the values will be doubled
when only one pump is loaded.
A. Adjustment of outer springs
Adjust it by loosening the hexagon
nut (630) and by tightening (or
loosening) the adjusting screw C
(628). Tightening the screw shifts the
control chart to the right and
increases the input horsepower as
shown in the Figure 27. Since turning
the adjusting screw C by N turns
changes the setting of the inner
spring, return the adjusting screw CI
(925) by NxA turns at first.
Figure 27