TM 5-3810-300-24 & P2
section must be positioned so that the previously scribed lines on the housing exteriors are in line with those scribed
on the front cover. The small slot located midway between the bores should align with the small vent hole in wear
plate. The face containing the slot shall be in contact with the wear plate.
Then, install dowel pins (7) and add a generous amount of clean oil into the gear cavities. Rotate gears to distribute
Position the thrust plate (22) on top of the gears in the center section, with the bronze face toward the gears. The
open side should be toward the inlet.
Install o-ring (11) into its back cover face groove. Oil the o-ring, the cover face, and the bearings. Install the back
cover so that the scribe marks are in line with the marks on the center section and front cover.
The housing retaining screws shall be alternately tightened to 190-210 in. lbs. on the "D" Series, 190-210 in. lbs. on
the "H" Series and 355-375 in. lbs. on the "M" Series.
Add a generous amount of clean oil into both ports to insure the pump is adequately lubricated. Rotate the drive
shaft to distribute the oil and check for freedom of shaft rotation. Shaft shall be free to rotate with the help of a short
wrench (100 in. lbs. maximum).
After pump has been reinstalled run 2-3 minutes before pressurizing. Try to apply pressure gradually for an additional five
minutes, but do not pressurize for longer than 5 seconds at a time.
Illustration 4-51. Power Pump Disassembly