Nova-Tech LMI Series G - SD Metering Pump - Manual (Page 28)

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7. Remove the diaphragm support ring (Item 230 in Fig-
ure 12) from the spacer (225).
8. Drain the oil out of the pump drive by removing the
drain plug from the pump housing (Item 20 in Figure 8).
9. Remove oil seal bellows clamping components as
follows:
a) On Liquid End Size SD2 models (Figures 9 &
10), remove adaptor piece (252), clamp ring
(210), mounting screws (227), and spacer (225).
b) On Liquid End Size SD4 models (Figures 11 &
12), remove oil seal clamp ring (210), mounting
screws (227), and spacer (225).
c) On Liquid End Size SD7 and SD8 models
(Figure 13 & 14), remove spring (272), unscrew
adapter (61), seal ring (210) mounting
screws (227& 228), and spacer (225).
10. Pull the oil seal (70) off the connecting rod (60).
11. Install a new oil seal onto connecting rod.
12. Apply a thin layer of O-ring type grease to top of oil
seal (part adjacent to connecting rod).
13. Reinstall parts removed in step 9. For Liquid ends
SD2, SD7, and SD8, install adaptor piece (252) or cross
piece (61) before mounting spacer.
14. Remove the motor and refill pump drive with oil (1
quart of Mobil SHC 629).
15. Reinstall motor.
16. Reinstall liquid end components in accordance with
the procedures found in the following:
a) For Liquid End Size SD2 models, refer to
paragraph 4.6.1, steps 4 thru 7.
b) For Liquid End Sizes SD4, SD7, and SD8
models, refer to paragraph 4.6.2, steps 10 thru
17.
17. Connect the motor in compliance with the direc-
tions marked during the prior disconnection (see also
Section 2: ELECTRICAL CONNECTIONS).
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4.8 RESTARTING THE PUMP
1. Reconnect the pump to the piping system.
2. Check that capacity is set to 0%.
3. Open system suction and discharge shut-off valves
and restart pump.
4. Set the pump to 100% to obtain faster priming of
liquid end.
5. After priming, set the pump to the desired capacity.
Retighten locking screw (320).