National Vacuum Equipment 607 challenger series Replacement And Rebuild Manual - page 9

607 Challenger

Series  |  9

www.natvac.com  |  800.253.5500

10  Insert the two (2) “T-handle” pins 

provided in your rebuild kit through 

the endplate and into the locator 

holes at 3 and 6 O’clock positions 

on the housing

  Snug the endplate close to the 

housing

  (Liquid Cooled Only) The 3/8 hex 

bolts located on the water jacket 

side of the pump housing need to 

have high temperature (Red) RTV 

Silicone re-applied

  Install the hex head bolts

Reseat the outer bearing in the end-

plate pilot

  Tighten the endplate bolts to 

   35-40 ft-lbs of torque

  At this point you should be able to 

turn the rotor by hand

11    Reinstall the oil pump drive key in the 

rotor

Reinstall the oil pump / rear bearing 

cover  Ensure the oil pump shaft is 

aligned with the drive key

Reconnect the oil lines to the oil 

pump, and front bearing  Do not 

overtighten fittings. 

Reconnect the pump to its oil reser-

voir and start at a slow R P M

Run the pump for a few minutes to 

allow oil to fill the lines. Inspect the 

translucent oil lines to check that oil 

is flowing.