8
TABLE 1 - COOLING OIL - Dielectric
SUPPLIER
GRADE
Sohio / Standard
SE 40, Energol HL22 or HL32
Shell
Turbo Oil 32
Texaco
Rando HD32, 522
Sun Petroleum
Supar 110, Sunvis 816WR, 911 or 916
Mobile
D.T.E. Oil Light or Rubrex 200
G&G
Circu Oil 22
Allegheny Petroleum
Altrapar 22
Woco
Premium 100
WARNING ! - DO NOT over
fi
ll oil . Over
fi
lling
of motor housing with oil can create
excessive and dangerous hydraulic pressure
which can destroy the pump and create a
hazard. Over
fi
lling oil voids warranty.
F-1.4) Pressure Test:
Pumps that have had the oil drained from the Motor
Housing -
Apply pipe sealant to pressure gauge assembly and
tighten into pipe plug hole (see Figure 2). Pressurize motor
housing to 10 P.S.I. Use a soap solution around the sealed
areas and inspect joints for “air bubbles”. If, after fi ve minutes,
the pressure is still holding constant, and no “bubbles” are
observed, slowly bleed the pressure and remove the gauge
assembly. Replace the pipe plug using a sealant. If the pressure
does not hold, then the leak must be located and repaired.
Pumps that have had the oil drained from the Motor
Housing -
The pressure test may be done with the oil at its
normal level. Remove pipe plug (5) from motor housing (2).
Apply pipe sealant to pressure gauge assembly and tighten into
hole (see Figure 2). pressurize motor housing to 10 P.S.I. and
inspect joints for ‘air bubbles”. For sealed areas below the oil
level, leaks will seep oil. If, after fi ve minutes, the pressure is
still holding constant, and no “bubbles”/oil seepage is observed,
slowly bleed the pressure and remove the gauge assembly. If
the pressure does not hold, then the leak must be located and
repaired.
CAUTION ! - Pressure builds up extremely
fast, increase pressure by “tapping” air
nozzle. Too much pressure will damage
seal. DO NOT exceed 10 P.S.I. in motor
housing
F-2) Impeller and Volute Service:
F-2.1) Disassembly and Inspection:
To clean out volute (25) or replace impeller (27), disconnect
power, remove nuts (50) and lock washers (18), vertically
lift motor and seal plate assembly from volute (25). Clean
out volute if necessary. Clean and examine impeller (27) for
pitting or wear, replace if required, inspect gasket (37) and
replace if cut or damaged. If the impeller (27) needs replacing,
remove hex nut (33) and washer (26). The impeller is keyed
onto the shaft with a woodruff key (32) and to remove, pull
impeller straight off the shaft using a wheel puller, if required.
Before reinstalling, check the motor shaft and impeller bore for
damage.
F-2.2) Reassembly:
To Install impeller (28), apply a thin fi lm of oil to motor shaft and
slide impeller straight onto shaft, keeping keyways lined up.
Drive key (33) into keyway. Locate washer (35), apply thread
locking compound to shaft threads, thread hex nut (34) to shaft
and torque to 40 ft. lbs. Rotate impeller to check for binding.
Position gasket (37) on volute fl ange and position impeller
and motor housing on volute (25). Install lock washer (18) and
thread nuts (50) onto studs (19). Torque to 20 ft. lbs. Check for
free rotation of motor and impeller.
F-3) Motor and Bearing and Seal Service:
F-3.1) Disassembly and Inspection:
To examine or replace the motor (1), bearing (39) and shaft
seal (38), drain oil from motor as outlined in paragraph F-1.2.
Disassemble volute and impeller as outlined in paragraph
F-2.1. (See Figure 3, 4, and 5) Position unit upright, using
blocks to avoid resting unit on shaft. Unscrew cord hex bolts
(4) and remove compression fl ange (10a) and power cord
(10). Remove snap ring (8) with a fl at head screwdriver. Pull
the terminal block (15) out of the motor housing (2) using a
T-bolt or pair of pliers and a .25-20 screw in the threads of the
terminal block (15). Be sure to leave slack on the motor leads
connected underneath. Use needle nose pliers to pull each
female connector off of the pins on the underside of the terminal
block (15) (see Figure 8). The unit voltage should be noted.
Remove socket head cap screws (35). Vertically lift upper pump
assembly from seal plate (24) by lifting handle (7). Inspect
square ring (36) for damage or cuts.
Motor -
Remove the motor bolts and lift motor stator from seal
plate (24). Disconnect capacitor leads from capacitor (3, 1
phase units).
FIGURE 2
