Crane BARNES STEP-DS Series, Installation And Operation Manual

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F-1.3) 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 4). Pressurize
motor housing to 10 P.S.I. Use soap solution around the
sealed areas and inspect joints for “air bubbles”.
If, after five minutes, the pressure is still holding constant,
and no “bubbles” are observed, slowly bleed the pressure
and remove the gauge assembly. Replace oil as described
in section F-1.4. If the pressure does not hold, then the leak
must be located and repaired.
Pumps that have NOT had the oil drained from the Motor
Housing - The pressure test may be done with the oil at its
normal level. Remove pipe plug (39) from motor housing (6).
Apply pipe sealant to pressure gauge assembly and tighten
into hole (see Figure 4). Pressurize motor housing to 10
P.S.I. Use soap solution around the sealed areas above the
oil level and inspect joints for “air bubbles”. For sealed areas
below the oil level, leaks will seep oil. If, after five 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.
Seal Chamber (DS Units Only) -
Set unit on its side with
fill plug (44) downward, remove plug (44) and drain all oil
from seal chamber. Apply pipe sealant to pressure gauge
assembly and tighten into hole in outer seal plate (29).
Pressurize seal chamber to 10 P.S.I. and check for leaks as
outlined.
F-1.4) Replacing Oil:
Motor Housing - Set unit upright and refill with new cooling
oil as per Table 1 (see parts list for amount). Fill to just above
motor as an air space must remain in the top of the motor
housing to compensate for oil expansion (see Figures 17 &
19). Apply pipe thread compound to threads of pipe plug (39)
then assemble to motor housing (6)
IMPORTANT! - For single phase units, oil level
should be below capacitor.
Seal Chamber (DS Units Only) - Set unit on its side, with
plug (44) upward, and refill with new oil as per Table 1 (see
parts list for amount). Apply pipe thread compound to threads
of pipe plug (44) and assemble to outer seal plate (29).
WARNING ! - DO NOT overfill oil.
Overfilling of motor housing with oil
can create excessive and dangerous
hydraulic pressure which can destroy the
pump and create a hazard. Overfilling oil
voids warranty.
TABLE 1 - COOLING OIL - Dielectric
SUPPLIER GRADE
BP Enerpar SE100
Conoco Pale Paraffin 22
Mobile D.T.E. Oil Light
G & G Oil Circulating 22
Imperial Oil Voltesso-35
Shell Canada Transformer-10
Texaco Diala-Oil-AX
Woco Premium 100
F-2) Impeller and Volute Service:
F-2.1) Disassembly and Inspection:
To clean out volute (1) or replace impeller (33) or U-cup (57),
disconnect power, remove hex bolts (26), and lockwasher
(12), vertically lift motor and seal plate assembly from volute
(1), see Figure 4. Clean out body if necessary.
Check U-cup (57) for damage. If U-cup needs replacement,
cut the U-cup from the volute (1) and clean surface of bore.
Clean and examine impeller (33), for cracks or breakage and
replace if required, inspect gasket (36) and replace if cut or
damaged. If the impeller (33) needs replacing, place a flat
screwdriver in the slot of the end of the shaft to hold the shaft
stationary while unscrewing the impeller (33).
FIGURE 4
FIGURE 5