GORMAN-RUPP 62-1/2E13-4A084, Technical Manual, Page: 50 / 107

engine in the RUN position and to interrupt spark in
the STOP position. The OIL switch, when released,
completes a connection to the oil pressure gage to
provide an indication of engine oil pressure. The
START switch, when depressed, completes a con-
nection to the engine starter to turn over the engine.
b . Tachometer and Sender. Engine speed is con-
stantly monitored by the electrical sending unit,
which is mounted on the engine governor, and which
sends electrical impulses to the tachometer mounted
on the control panel. The tachometer provides an
indication of engine speed in rpm’s.
c . Battery. The battery supplies the electrical
power necessary to operate the starter to start the
engine.
It is a 24-volt, lead-acid type, and it is
mounted in a covered battery box which is secured
to the skid base. The negative battery terminal is
connected to the frame with a ground strap. The
positive battery terminal connects to a terminal on
the starter by means of a battery cable.
3-12. CONTROL PANEL
a. Removal and Disassembly.
(1) Refer to figure 3-4 and remove the control
panel.
(2) Refer to figure 3-5 and disassemble the control
panel as necessary to replace defective parts.
b. Cleaning and Inspection.
(1) Clean all electrical parts with a cloth lightly
dampened with an approved cleaning solvent;
dry thoroughly.
Figure 3-4. Control
3-6
(2)
(3)
(4)
(5)
Inspect for broken or damaged wire insulation;
worn, burned, or loose terminals, and cracked,
broken, or damaged parts.
Check switches for proper continuity. Refer to
figure 3-3.
Check the tachometer and oil pressure gage for
cracked dial glasses, discolored or illegible
dials, or other damage.
Repair or replace damaged parts.
c. Reassembly and Installation.
(1) Refer to figures 3-5 and 1-3 and reassemble
the control panel.
(2) Refer to figure 3-4 and install the control panel.
3-13. ELECTRICAL SENDING UNIT
a. Removal. Refer to figure 3-6 and remove the
electrical sending unit.
b. Cleaning and Inspection.
—
(1)
(2)
Clean sending unit with a cloth dampened lightly
with an approved cleaning solvent; dry thoroughly.
Inspect sending unit for cracks, breaks, defec -
tive insulation, and other damage. Manually turn
the shaft of the sender. It should rotate easily
without catching or binding. Replace a damaged
sender.
c . Installation. Refer to figure 3-6 and install the
electrical sending unit.
panel, removal and installation.