Crane Barnes SE51 Series, Руководство по установке

Страница: 8 / 20

8
F-1.2) Testing Oil:
1.) Place pump on it’s side, remove pipe plug (41), from motor
housing (11) and drain oil into a clean, dry container.
2.) Check oil for contamination using an oil tester with a
range to 30 Kilovolts breakdown.
3.) If oil is found to be clean and uncontaminated (measure
above 15 KV. breakdown), refi ll the motor housing as
per section F-1.3.
4.) If oil is found to be dirty or contaminated (or measures
below 15 KV. breakdown), the the pump must be carefully
inspected for leaks at the shaft seal (1), gland nut (12b),
O-ring (23) pipe plug (41), before refi lling with oil.
To locate the leak, perform a pressure test as per
section F-1.4. After leak is repaired, refi ll with new oil as
per section F-1.3.
F-1.3) Replacing Oil:
Motor Housing -
Drain all oil from motor housing and
dispose of properly. Set unit upright and refi ll with (see parts
list for amount) new cooling oil as per Table 1. An air space
must remain in the top of the motor housing to compensate
for oil expansion (see Fig. 10). Set unit upright and fi ll only
until the motor, as viewed through the pipe plug opening, is
just covered and no more. Apply pipe thread compound to
threads of pipe plug (41) and install in motor housing (11).
WARNING ! - DO NOT overfi ll oil. Overfi lling of
motor housing with oil can create excessive
and dangerous hydraulic pressure which
can destroy the pump and create a hazard.
Overfi lling oil voids warranty.
TABLE 1 - COOLING OIL - Dielectric
SUPPLIER GRADE
BP Enerpar SE100
Conoco Pale Paraffi n 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-1.4) Pressure Test:
Before checking the pump for leaks around the shaft seal,
square rings, and cord inlet, the oil level should be full as
described in section F-1.3. Remove pipe plug (41) from
motor housing (11). Apply pipe sealant to pressure gauge
assembly and tighten into hole (see Fig. 4). 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
(41) using a sealant. 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, Volute and Exclusion Seal Service:
F-2.1) Disassembly and Inspection:
To clean out volute (7), disconnect power, remove cap
screws (34) and lockwashers (22), vertically lift motor and
seal assembly from body (7). Clean out body if necessary.
Inspect gasket (24) and replace if cut or damaged. Clean
and examine impeller (2) for pitting, wear, cracks or
breakage, replace if required.
If impeller (2) requires replacing, remove jam nut (29) by
placing a fl at screwdriver in the slot of the end of the shaft
to hold the shaft stationary while unscrewing the impeller
(2). Once impeller (2) is removed, remove spacer (32), and
exclusion seal (31) if damaged or cut.
F-2.2) Reassembly:
Position exclusion seal (31) on shaft until it seats against
the stationary portion of seal (1). Place spacer (32) on shaft
until it seats against exclusion seal (31). To install impeller
(2), clean the threads with loctite cleaner and screw
impeller (2) onto the shaft hand tight. Apply thread locking
compound to shaft threads and install nut (29). Torque to 40
ft. lbs. Rotate impeller to check for binding. Position impeller
and motor assembly on volute (7). Apply thread locking
compound to cap screw (34) and position lockwasher (22)
on cap screw (34) and screw into volute (7). Torque to 8 ft.
lbs. Check for free rotation of motor and impeller.
F-3) Motor, Bearing and Seal Service
F-3.1) Disassembly and Inspection:
To examine or replace the motor (14), bearing (21) and
shaft seal (1), disassemble volute and impeller as outlined
in paragraph F-2.1. Drain oil from motor as outlined in
paragraph F-1.3.
10 PSI AIR
Pressure Gauge Assembly
(See Parts List)
Remove Pipe
Plug
FIGURE 4
Manual Index