moyno WA series, Руководство по обслуживанию, Страница: 5 / 16

3
When packing is new, frequent minor adjustments during the
first few hours of operation are recommended in order to
compress and seat the packing.
1. Upon initial start-up of the pump, adjust the gland nuts
for a leakage rate of 50-11 drops per minute until the
packing has seated and adjusted to the operating
temperature (approximately 10-15 minutes).
2. If leakage is excessive after 15 minutes of operation,
tighten the gland nuts ¼ of a turn.
3. Tighten the gland nuts ¼ of a turn after an additional 15
minutes if necessary and repeat this procedure until a
desired leakage of 1-2 drops per minute is obtained.
Adding grease may also reduce leakage by providing a
barrier at the lantern ring.
CAUTION: Do not tighten until zero leakage is obtained. Over-
tightening the packing gland may result in accelerated wear on
the packing and damage to the shaft. In those situations where
no packing leakage can be tolerated, consult your Moyno
Authorized Representative.
Area To Lubricate
Approved Lubricant or
Equivalent
Packing
ACG-2
(Dubois Chemical, Inc.)
4-4. Packing Replacement
Note: In this section, the first reference to each pump part will
be followed by a number or a letter in parentheses ( ). These
numbers and letters are used to identify the pump parts and
hardware items in the Exploded Views in Section 12-1.
When tightening the gland nuts can no longer regulate leakage,
remove and replace the packing. The entire pump does not
need to be disassembled to replace the packing. Briefly,
replace as follows:
1.
Remove packing gland nuts and slide gland halves (36)
back along drive shaft (26).
2. Use a packing puller tool (see Figure 4-2) to remove the
packing (34).
Figure 4-2. Packing Removal Tool
3.
Inspect surface of drive shaft for excessive wear or
grooves due to packing rub. If shaft is worn, or is badly
scored or grooved, it should be replaced.
4.
If drive shaft is not worn, install a lantern ring and four
packing rings, lubricating them before installation with a
good grade of packing grease. Be sure to stagger the
packing ring joints at 90-degree increments.
Note: The stuffing box is supplied with four rings installed; a
fifth ring may be added after initial compression.
CAUTION: ALWAYS USE A PROPER PACKING TAMPER
TOOL TO INSTALL PACKING. Do not use a pointed or sharp
tool, as damage to the packing material or drive shaft could
result. To assure proper shaft lubrication, never use a one-
piece spiral wrap packing.
5. Replace packing gland halves and secure with packing gland
and nuts (T).
6. Adjust packing per Section 4-3.
5-1. DISASSEMBLY
Note: In this section and in following sections on CLEANING,
INSPECTION, and ASSEMBLY, the first reference to each pump
part will be followed by a number or letter in parentheses ( ). These
numbers and letters are those used to identify the pump parts and
hardware items in the Exploded Views in Section 13-1.
5-2. Disconnect Pump
1. Disconnect the power source.
2.
Close suction and discharge valves to isolate the pump from
the line.
5-3. Stator Removal
1. Remove section of discharge pipe attached to discharge
flange (1).
2.
Remove pump support (5) from discharge flange (1).
3.
Unbolt stator clamp ring (4) from suction housing and remove
stator from rotor (turning stator clockwise while removing will
ease disassembly). Remove the stator retaining ring. Remove
stator clamp ring from stator. See Figure 5-1. for the typical
retaining ring removal procedure.
4.
Remove discharge flange (1) by unbolting it from stator clamp
ring (4) and remove stator gasket (2). Use a flat-headed
screwdriver tip to remove stator retaining ring (3) and stator
clamp ring (4) from stator (6).
Figure 5-1. Typical Retaining Ring Removal
5-4. Suction Housing Removal
1.
Remove four bolts (U) and lock washers (Y) holding the
suction housing (11) to the bearing housing (35).
2.
Pull the suction housing (11) toward the rotor and away from
the bearing housing (35). Place a block of wood under the
suction housing to prevent it from dropping as you pull it away
from the bearing housing.
5-5. Rotor / Con Rod / Drive Shaft Assembly Removal
1.
Slide the slinger ring (31) along the drive shaft (26), towards
the gear reducer, exposing the drive pin (25).
2.
With a punch and hammer, tap the drive pin (25) from the
drive shaft.