Dover PSG BLACKMER MRLN4B 설치, 작동 및 유지보수 지침 - 페이지 14

{카테고리_이름} Dover PSG BLACKMER MRLN4B에 대한 설치, 작동 및 유지보수 지침을 온라인으로 검색하거나 PDF를 다운로드하세요. Dover PSG BLACKMER MRLN4B 20 페이지. Power pumps

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Dover PSG BLACKMER MRLN4B 설치, 작동 및 유지보수 지침

MAINTENANCE: MLN4B, MRLN4B

PUMP ASSEMBLY

Before reassembling the pump, inspect all component

parts for wear or damage, and replace as required.

Wash out the bearing/seal recess of the head and

remove any burrs or nicks from the rotor and shaft.

Remove any burrs from the liner (41).

LINER – The liner has a close fit with the casing (12);

take care to avoid finger injury during installation.

Align and start the liner (41) and liner key (74)

together into the pump casing. The word "INTAKE,"

which is cast into the liner, must be towards the

intake side of the pump. NOTE: The intake port is

marked with an inward facing arrow.

Lightly tap the outer edge of the liner with a plastic

or lead hammer to fully insert it into the casing.

DISC – Before the disc is attached to the head,

make sure both surfaces are clean and smooth.

Gently file away any burrs or rough spots.

Place a disc (71) on the head (20 or 20A) with the

counter-bored screw holes facing up.

Position the disc so that when the head is

mounted with the drain hole and V-notch down,

the word "INTAKE" on the disc will be towards the

intake side of the pump. The two disc holes must

be in the 2 and 4 o'clock positions if the inlet is on

the right (see Figure 10).

Install the four lockwashers (71B), tangs outward,

and machine screws (71 A) to attach the disc to the

head.

Figure 10

HEAD ASSEMBLY

To mount the head assembly (20) to the casing

(12), first install the head O-ring (72) in the groove

formed where the disc meets the head.

Grease the entire chamfer on the pump casing

where the head O-ring will need to slide into

position.

Place the head assembly (20 or 20A) on the studs,

with the V-notch and drain hole facing down

(towards the bottom of the pump).

Check to make sure the word "INTAKE" on the disc

is towards the intake side of the pump when the

head is mounted.

Install and tighten the two nuts (21C) on the head

studs.

Install and tighten the head capscrews (21) uniformly,

making sure the head O-ring (72) slides into place

without damage.

SLEEVE BEARINGS (Bushings) – If the sleeve bearing

(24) has been removed from the hub (20C), a new bearing

must be installed prior to attaching the hub assembly to

the head.

To aid installation, heat the hub in an oven at 200°F

(93°C) before installing the bearing.

Place the bearing (24) in the bearing bore on the

inside face of the hub (20C) with the tapered end

inward.

Using an arbor press, press the bearing into the hub

in one continuous motion, until it is flush with (or

slightly below) the inside face of the hub. Starting and

stopping the pressing motion may result in a cracked

bearing.

HUB ASSEMBLY

Before attaching the hub assembly (20C) to the

mounted head (20), grease the three head chamfers.

Install the hub O-rings (72A & 72B), and slide the hub

(20C) onto the shaft with the V-notch of the hub

towards the bottom of the pump.

Install and tighten the two hub capscrews (21D) to pull

the hub into place. BEGIN WORKING ON THE

OPPOSITE SIDE OF THE PUMP.

ROTOR AND SHAFT – It is necessary to install the

bottom vanes and the push rods in the rotor while inserting

the rotor and shaft into the pump casing.

a. Partially install the rotor and shaft (13) into the open

side of the pump and through the bore of the installed

head (20). Be careful not to damage the disc face with

the shaft end. NOTE: When installing the rotor and

shaft, the rotation arrow on the rotor must point in

the direction of pump rotation-towards the

discharge side of the pump when the arrow is

positioned directly below the shaft. See Figure 10.

b. Keep part of the rotor (13) outside the casing (12) such

that the three bottom vanes (14)(rounded edge

outward) can be inserted into the rotor slots and held in

place while all three push rods (77) are inserted. See

Figure 11.

c. The rotor and shaft (13), with the three bottom vanes

(14) installed, can now be fully inserted into the casing

(12).

d. Install the remaining vanes (14) in the top positions of

the rotor.

106-A00

Page 14/20

Figure 11