GORMAN-RUPP 62-1/2E13-4A084, Technical Manual, Page: 49 / 107

3-7.
PUMP FAILS T0 START
Probable cause
Possible remedy
Battery weak or dead Service battery and recharge, or
replace battery if defective (par.
3-14).
Engine defective Refer to
TM 5-2805-259-14,
Impeller frozen Clean or replace impeller (par. 3-
23).
Impeller clogged or Disassemble and clear obstruction
jammed
(par. 3-23).
3-8.
NO WATER DISCHARGE OR INSUFFICIENT
DISCHARGE
Probable cause Possible remedy
Discharge check valve Remove discharge elbow at pump
not seating
discharge flange and clean de-
posits from around discharge
valve. If gasket is worn in area
where check valve seats, replace
damaged gasket.
Excessive suction lift Move pump closer to water source.
Leak in suction line
Check all suction hose and line
connections, all exhaust primer
line connections, and exhaust
primer valve for air-tight condi-
tion.
Exposed suction intake Submerge suction intake.
Engine speed too low
Make sure engine speed control is
in governed position. Check ta-
chometer with pump in operation;
3-11. G E N E R A L
Probable cause
Impeller clogged
Impeller broken, dam-
aged, or worn
Suction hose faulty
Suction line or
strainer clogged
3-9.
P U M P N O I S Y
Probable cause
Impeller loose, bro-
ken, or damaged
pump bearing defective
Engine bearing
defective
3-10.
P U M P L E A K S
Probable cause
Suction or discharge
connections loose
Bolts on flanged joints
loos e
Seal defective
Gaskets defective
Pump body defective
Section IV. ELECTRICAL SYSTEM
Possible remedy
speed should be 3600 rpm. Adjust
engine speed if incorrect (TM 5-
2805-259-14).
Disassemble and clear obstruction
(par. 3-23).
Replace impeller (par. 3-23).
Replace suction hose if rubber in-
ner line has collapsed.
Clear strainer and suction line.
Possible remedy
Tighten or replace impeller (par.
3-23) .
Replace bearing (par. 3-23).
Refer to engine manual, TM 5-
2805-259-14.
Possible remedy
Tighten connections.
Tighten bolts.
Replace gaskets (par. 3-23).
Replace gaskets (par. 3-23).
Repair or replace pump (par. 3-20
or 3-23).
trol panel provides controls and instruments for start-
ing, stopping, and monitoring the operation of the
a . Control Panel. An electrical schematic diagram engine. The RUN-STOP switch is connected to the
of the control panel is given in figure 3-3. The con- engine magneto, allowing it to provide spark for the
Figure 3-3. Control panel electrical schematic diagram.
3-5