Product Manual A

Maintenance
60 MTP4000-6000DZV/DZD Operating Manual 31609 A
4. Wipe the lapped sealing faces of the seat and the primary seal perfectly clean. Use extreme care to avoid
marking the sealing face or the primary seal. Slide the rotating portion of the seal, including the spring, along
the shaft.
Once the rotating portion has been placed on the shaft, the rest of the installation must be
made at once. Delay may result in the rubber bellows seizing on the shaft in the wrong
position.
Install the impeller. Be sure that the spring slides over the impeller hub and pushes against the backshroud of the
impeller.
PRIMING CHAMBER
Float Removal and Installation
1. Loosen the hose clamp and disconnect the air hose from the prime valve.
2. Remove the four 3/8 in. hex nuts and capscrews from the priming chamber cover.
3. Lift off the priming chamber cover, complete with float linkage and prime valve assemblies.
4. Unscrew the float from the rod set screw.
Reinstallation
1. Screw the float onto the rod and lock with set screw.
2. Replace the priming chamber cover, complete with float linkage and prime valve assemblies.
3. Replace the four 3/8 in. hex nuts and capscrews and tighten against the gasket.
4. Reconnect the air hose and secure with a hose clamp.
Prime Valve Removal and Reinstallation
1. Remove the priming chamber cover, complete with float linkage and prime valve assembly. Refer to “Float
Removal and Installation” on page 60.
2. The valve body can be separated from the priming chamber cover by removing the 3/8 in. capscrews for
access to the O-ring. No other parts are directly accessible from outside of the cover.
Float Valve Linkage Removal and Installation
There is normally no reason to remove or replace the float valve linkage unless parts have experience damage. In
the event that replacement is required, use the following instructions:
1. Separate the linkage frame from the cover by removing the two 5/16 in. capscrews. There may also be
stainless flat washers between the frame and cover. (It is important to replace these washers when replacing
the frame, as the total mounting distance between the top of the cover and the frame is an essential element
in proper priming valve operation.)
2. All elements of the linkage are held in position with clevis pins, side links and cotter pins. To remove any
damaged element, straighten and remove the necessary cotter pins and clevis pins.
Note: The tow actuator arms are very similar in appearance. Before removing either of these parts, make special
note of their position and direction in relationship to other assembly parts.