Armstrong 4600 HSC series Installations- und Betriebsanleitung - Seite 10

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i n s ta l l at i o n &

o p e r at i n g i n s t r u c t i o n s

3.2. bearings

• sealed greased for life bearings are fitted on your pump.

• No particular attention is required

• No need for greasing since the bearings are greased for the

entire bearing life

• If abnormal noises come from the bearing during normal

operation, replace bearings

3.3. stuffing box with packing

stuffing box dismantling

• Adjust pressure of packing gland to obtain a slight leak of 6

to 8 drops per minute for suction pressures up to 20 psig (the

increase in suction pressure causes proportional increase in

leakage through the stuffing box)

• Remove flush line connection from stuffing box extension

• Remove gland plate from stuffing box

• Remove stuffing box extension

packing replacement

• When removing old packing, make sure bottom rings are

completely removed

• Thoroughly clean the stuffing box and check condition of

shaft sleeve (a badly worn or corroded shaft sleeve will never

seal properly)

• Cut packing into lengths allowing V" between ends when

installed

• Place first ring around shaft and press firmly and evenly into

stuffing box

• Continue in the same manner staggering ring joints one quar-

ter of a turn until stuffing box is filled

• Make certain lantern ring is in correct position under

pipe connection

stuffing box assembly

• Install back stuffing box extension

• Install flush line connection on stuffing box extension

• Install gland plate and compress evenly leaving it finger tight

• Compress packing evenly with gland and leave gland nut

finger tight

• With pump running adjust gland with recommended

leakage rate

Horizontal split case

fire pumps

caution: Packing should not be pressed too tight, as this

may result in burning the packing and scoring the shaft

sleeve.

4.0 pump disassembly

warning: Whenever any disassembly work is to be done

on pump, disconnect power source to driver to eliminate

any possibility of starting unit.

4.1

to remove rotating assembly

1. Remove coupling guard and disconnect coupling halves

2. Disconnect flush line from upper half casing

3. Remove bolting from bearing covers and jack the (2) screws

to help remove bearing covers

4. Remove bearing locknut on opposite side of motor

5. Remove bearing by holding shaft in place and turning nut

behind bearing; bearing will slide out

6. Remove gland plate and split gland

7. Remove stuffing box extension

8. Remove packing, lantern ring and bushing

9. Remove top casing bolting

10. Screw (2) jack screws down to separate upper and

lower case

11. Turn jack screws back after separation to prevent interfer-

ence at reassembly

12. Lift upper casing straight up until clear of impeller

13. Place slings around shaft near the bearing housings and lift

shaft assembly

14. Place shaft assembly in a clean, dry work area for necessary

disassembly

4.2 disassembly of rotating element

1. Remove pump half coupling

2. Unscrew (4) setscrews in sleeve, then unscrew sleeve on

right side of the pump when facing suction flange

3. Slide impeller on shaft and remove

note direction of vanes. impeller must be installed in

same direction.

4. Remove impeller key

5. Unscrew other sleeve