DISASSEMBLY

1. Mark the head and casing before disassembly to ensure proper reassembly. 12. Clean all parts thoroughly and examine for wear and damage. Check the bushings, carbon discs, vanes, pushrods and replace if necessary. Check all other parts for nicks, burrs, excessive wear and replace if necessary. 2. Relieve pressure and drain fluid by removing the drain plug as shown in “Pressure Relief Valve Instruction,” figure 4 . page 10. 4. 3. Remove the first carbon disc using caution not to break. See Remove the head from the pump. If the pump is furnished with a pressure relief valve, it need not be removed from casing or disassembled at this point. Refer to figure 5 .

DANGER !

5. 6. Remove the top vane from the rotor. Ensure the pushrod is not obstructing the vane being removed. Rotate the shaft and remove the other vanes in the same manner. Remove the industrial seal gland capscrews, industrial slide packing gland out of the seal box, and remove the seal.

Before opening any Viking pump liquid chamber (pumping chamber, reservoir, relief valve adjusting cap fitting, etc.) Be sure:1. That any pressure in the chamber has been completely vented through the suction or discharge lines or other appropriate openings or connections.2. That the driving means (motor, turbine, engine, etc.) has been “locked out” or made non-operational so that it cannot be started while work is being done on pump. 3. That you know what liquid the pump has been handling and the precautions necessary to safely handle the liquid. Obtain a material safety data sheet (MSDS) for the liquid to be sure these precautions are understood.Failure to follow above listed precautionary measures may result in serious injury or death.

7. Loosen the mechanical seal setscrews for applicable seals. 8. Ensure the pushrods are not lodged in ports prior to removing the rotor. NOTE: When disassembling a pump with a cartridge seal, reference cartridge seal replacement beginning on page 8. 9. 10. Carefully remove the rotor and shaft to avoid damaging the bracket bushing. One or more pushrods may fall out of the rotor upon removal from the casing. Take care to not jam the pushrods between the casing and rotor during the rotor removal. Carefully remove the second carbon disc from the casing. If the casing disc is jammed, a small screwdriver or punch may be used as shown in Figure 6 . Figure 5 . Use the screwdriver to help guide the disc out of the casing cam bore as shown in 11. Press the bushings out of the casing and head if replacement is needed. For the head bushing, remove the head cover plate before pressing out the bushing.
FIGURE 4Location of drain plug. FIGURE 5Removal of Disc.FIGURE 6Use screwdriver to guide disc out. SECTION TSM445ISSUEAPAGE 5OF 11