DPS TS-80 Руководство по эксплуатации - Страница 6

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Impeller Installation

The shaft impeller threads must be totally clean before installing the impeller. The slightest

amount of dirt on the threads can cause the impeller to seize to the shaft, making future

repairs difficult.

Install the same thickness impeller shims as previously removed.

Apply Bostik Never –Seize or equivalent to the shaft threads and screw the impeller onto the

shaft until tight. Be sure the seal spring seats squarely over the shoulder on the back of the

impeller.

A clearance of 0.010 to 0.020 inch (0.25 to 0.50mm) between the seal seat is recommended

for maximum pump efficiency.

Measure the clearance and add or remove shims to suit.

Before installing the impeller cap screw and washer the rotating assembly must be installed in

the pump casing in order to torque the impeller cap screw.

After the rotating assembly is installed in the pump casing, coat the cap screw with 242

Loctite and install the impeller washer and cap screw; Torque the cap screw to 90 ft/lbs.

Check Valve Installation

Reach through the front cover opening with the check valve and position the check valve

adaptor in the mounting slot in the suction flange.

Align the adaptor with the flange hole and secure with check valve pin.

Front Cover Installation

If the wear plate was removed for replacement, carefully centre it on the front cover and

secure it with screw and washer.

The wear plate must be concentric to prevent binding when the front cover in installed.

Replace the front cover o-ring.

Slide the front cover assembly into the pump casing being sure the wear plate doesn't bind

against the impeller.

Secure the front cover assembly by tightening the tighten handles (14) evenly.

Do not over tighten the tighten handles, they should be just tight enough to ensure a good

seal.

Be sure the wear plate doesn't bind against the casing.

Rotating Assembly Installation

Install the bearing housing and seal seat o-rings.

Slide the rotating assembly into the pump casing into the pump.

Install the adjusting screws using the same thickness as removed.

Secure the rotating assembly to the pump casing

Do not fully tighten until the back cover has been set.

A clearance of .010 to .020 inch between the impeller and the wear plate is also

recommended. This clearance can be obtained by adjusting an equal amount of screw from

each rotating assembly screw set until the impeller scraps against the wear plate when the

shaft is turned. After the impeller scraps , adjust approximately 0.15 inch of clearance with the

adjusting screws.

Lubrication

Use SAE-30 oil for the seal assembly and bearing housing lubrication