MULTIQUIP MQ600TD80 Spécifications télécharger pdf (Page 29)

MQ600TD80 TRASH PUMP• OPERATION AND PARTS MANUAL — REV. #11 (10/10/11) — PAGE 29

MAINTENANCE

PUMP MAINTENANCE

This section is intended for the experienced, qualiﬁed

technician as a guideline to service the pump. All service

precautions must be observed to avoid injury. Read and

understand all safety information and the operation section.

Before servicing this equipment be sure to do the following:

1. Turn off the engine

2. Follow lock out procedures.

3. Vent the pump cautiously.

4. Drain the pump.

5. Allow the pump to cool if overheated.

6. Use appropriate lifting devices.

Mechanical Seal Replacement Instructions

Disassembly

1. It is recommended to remove the main casing body.

2. Remove the impeller by ﬁrst locking (using a wrench)

the front engine crankshaft pulley.

3. Using a soft-faced mallet, remove impeller by tapping

vane in counterclockwise direction.

4. Remove mechanical seal components.

5. Remove the rear adaptor cover, sight glass, and vent

tubes.

6. Using a punch, remove adaptor plate mechanical seal

stationary seal plate.

7. Remove stationary oil seal.

Installation

1. Install new stationary oil seal into adaptor case

housing. The seal spring should face inward towards

the impeller.

2. Lightly lubricate the mechanical seal stationary seal

plate O-ring and gently tap into adaptor plate making

sure it is level with the O-ring groove facing the

impeller.

3. Install the adaptor plate bolting onto the intermediate

bearing housing.

4. Inside the adaptor plate cavity, assemble the stationary

plate by installing the O-ring then the tungsten carbide

stationary element squarely onto the stationary seal

plate. (Note: Tungsten element chamfer side towards

pump end). A slight amount of grease can be used to

allow retention. Double check that the Tungsten carbide

element surface is free of dirt contamination including

ﬁngerprints.

5. Coat the mechanical seal bellows with a light drop of

lubricating oil. Slide the seal bellows onto the shaft

sleeve until ﬂush with the sleeves chamfered end.

Place the Tungsten carbide rotating element onto seal

cage, the chamfered side towards engine. Inspect the

rotating Tungsten for cleanliness. Use a slight amount

of grease for retention. Carefully push and rotate the

sleeve assembly onto the shaft until the Tungsten

element faces are mated. The sleeve should ﬁrmly

rest against the shaft shoulder. Use extreme care not

to damage or roll over the oil seal lip.

6. Alternative mechanical seal installation method —

After installation of adaptor plate assembly, slide the

sleeve chamfered side toward engine. Use extreme

care not to damage the oil seal. Utilize secondary

sleeve as installation tool, installing over shaft butting

against primary sleeve. Lubricate seal bellows slowly

sliding seal assembly onto primary sleeve until the

Tungsten carbide faces are squarely mated. Remove

installation tool.

7. Assemble the spring then add the necessary

adjustment shims.

8. Inspect the impeller and shaft threads and make sure

they are clean before installation. Apply "Anti-Seize"

compound. Even the slightest amount of dirt on the

thread can cause the impeller to seize or make future

removal difficult. At the slightest sign of binding,

immediately back impeller off inspecting threads. Do

not force the impeller onto the shaft. The impeller rear

to adaptor plate clearance is 0.25 - 0.40 inches (0.64

- 1.02 mm). Make positively sure that the impeller is

fully tightened utilizing all the threads. If not properly

tightened, the impeller could further tighten jamming

into the adaptor plate during pump operation, seizing

the engine.

9. Reinstall the main pump body, checking for proper wear

plate to impeller clearance.

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MULTIQUIP MQ600TD80 Spécifications Page 29

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