Seiwa SW AP03 - Manual (Page 41)

Table 3.3 Hydraulic Ram Mounting
Stroke
(mm) Distance to
rudder stock (mm).
200 175 - 200
250 200 - 250
300 225 - 300
380 300 - 380
1. Mount the hydraulic pump close to the cylinder on a horizontal surface and in a
dry area of the hull. Remove the plastic reservoir cap and replace it with the
vented aluminium cap.
2 Ensure that the rudder stops are installed to prevent the cylinder hitting the end
of its travel.
3. There are 4 wires on the pump: two for the motor and two for the solenoid
bypass valve. When not in PILOT, the bypass valve permits oil to bypass
the pump and flow back to the cylinder. Connect the orange and black
motor wires to the motor terminals in the Junction Box, using at least 20
amp cable. Connect the two red solenoid wires to the clutch terminals in the
Junction Box. (Lighter cable may be used.) Polarity is not important.
4. The cylinder has been bled before shipping. Check the oil level in the pump
and, if necessary, top up with automatic transmission fluid.
5. Go to Step 8 in the step-by-step guide at the beginning of the chapter and
complete the steps.
6. The hydraulic pump has a flow-rate adjustment which should be set to give the
correct rudder response time. Check page 5-2 of this manual for the correct
time and adjust if necessary. To adjust, loosen the two screws on the pump
body just enough to allow it to be rotated. Rotate the body clockwise to
decrease the flow or anticlockwise to increase it.
7. Bleeding. If it becomes necessary to re-bleed the system, carry out the
following:
(a) Fill the reservoir with automatic transmission fluid.
(b) Locate the two brass bypass screws, one on each side of the solenoid
and loosen both 3 - 4 turns.
39
39