Milton Roy MILROYAL D, Инструкция по эксплуатации

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11 Instruction Manual
SECTION 4 - MAINTENANCE INSTRUCTIONS-LIQUID END 1/8” AND 1/4” DIAMETER PLUNGERS
4.3 LUBRICATION
No lubrication is required. All sliding surfaces which
would normally require lubrication are in contact
with a self- lubricating fluorocarbon material.
4.4 CHECK VALVE MAINTENANCE
Suction and discharge cartridge assembly
405 are designed to be self cleaning and should
give long, trouble free service. If the check valves
do become fouled, a hot detergent solution
cleaning will usually remove all but the most
stubborn contaminants. Prepare a hot detergent
solution and pump it freely through the pump for
10 to 15 minutes. Flush with hot water and return
the pump to normal service.
If flushing does not prove adequate, remove the
cartridges and inspect for chemical damage.
A cotton swab is often helpful in cleaning the
seat area. Replace cartridge assembly with Ball
Checks, Seats, and Gaskets in the order shown on
Figure 4 . This cartridge design depends on
compression of the Cap Gaskets (No. 385) to
prohibit leakage from around outside of Ball Seats
and exterior thread of No. 381 Caps; therefore, on
reassembly tighten Caps down firmly.
4.5 PACKING ADJUSTMENT, START- UP
AND REPLACEMENT
New Packing, installed and shipped from the
factory in a complete pump or liquid end, has been
“set” and run-in during production quality assurance
testing and requires no further breaking in for start-
up. If, during operation, leakage does occur, Gland
Nut No. 430 should be tightened a little at a time
(1/6 turn or less) until leakage is minimized or
stopped. Wait at least five minutes between
adjustments to allow packing to resettle. If it is
possible to tolerate a little leakage at the Gland, the
leaking liquid will help to lubricate and cool Packing
and Plunger, greatly extending the life of both.
4.5.1 Replacing Packing
1. To replace packing it is necessary to remove
liquid end from the pump.
2. Loosen No. 430 Gland Cap.
3. Remove two screws which retain No. 410
Adapter to Pump Housing and pull liquid end
straight forward, taking care not to bend plunger.
Inspect plunger for scoring or pitting and replace
if necessary.
4. With liquid end OFF pump, remove gland cap
and packing follower.
5. Remove old packing with a small hook
(do not scratch stuffing box) and thoroughly
clean stuffing of any foreign material.
6. Install new packing with female portions facing
forward so they may react with applied hydraulic
pressure and expand against stuffing box walls
and plunger to effect a good seal.
7. Replace packing follower and screw gland cap
on lightly.
8. Install plunger if it has been removed, making
sure the two thrust washers are replaced. If
necessary, moisten solid washer with a drop
of clean light oil to insure it remains seated in
plunger adapter nut during installation.
9. After tightening plunger adapter nut, loosen it
1/8 turn (no more or thrust washer may
unseat).
10. Carefully slide entire liquid end over plunger
and back onto pump and secure it with the two
screws.
11. Tighten gland cap finger tight to center plunger,
then tighten plunger adapter nut firmly.
12. Tighten No. 430 gland cap 1/4 turn past finger
tight and hold packing under this compression
for 10 minutes to allow packing to settle in
stuffing box.