TM 5-3805-274-13&P
0034
CLEANING AND INSPECTION - CONTINUED
4. If any internal parts show excessive wear, replace parts.
END OF TASK
ASSEMBLY
CAUTION
Never remove balls or plug as service procedure. These items
provide a vent in case of pressure buildup in pump. Failure to
comply may result in damage to equipment.
1. If balls (Figure 2, Items 2, 3, and 23) are blown out, press new balls (Figure 2, Items 2, 3, and 23) in
with new retainers (Figure 2, Item 1).
2. Place pump body (Figure 2, Item 22) so mark made during disassembly is facing you.
3. Liberally coat inside of pump body (Figure 2, Item 22) with clean hydraulic oil to ensure easy assembly.
4. Assemble two new O-rings (Figure 2, Item 19) and new back-up rings (Figure 2, Item 20) on bearings
(Figure 2, Item 21) on bottom of pump body (Figure 2, Item 22).
5. Examine four new isolation plates (Figure 2, Items 12 and 18). They are slightly different. Choose two
having rounded edges. Install one in bottom of pump body (Figure 2, Item 22) with rounded edges in
proper location.
6. Install new center separator (Figure 2, Item 24), two new end separators (Figure 2, Item 16), and new
sealing strips (Figure 2, Item 17).
7. Install other new isolation plate (Figure 2, Item 26) with rounded edge down and snap in place.
8. Keep bottom pressure plate (Figure 2, Item 15) level with bronze side facing up. Slide in place in bottom
of pump body (Figure 2, Item 22). Do not force plate.
CAUTION
Do not drop drive gear into place. Slide drive gear in gently.
Dropping drive gear will damage bronze bottom pressure plate.
Failure to comply may result in damage to equipment.
9. Slide drive gear (Figure 2, Item 25) gently into place in bore nearest you.
10. Install idler gear (Figure 2, Item 14) in opposite bore of pump body (Figure 2, Item 22). Numbered end
of idler gear (Figure 2, Item 14) should be facing up.
11. Install top pressure plate (Figure 2, Item 13) with bronze side facing down.
12. Assemble two new O-rings (Figure 2, Item 9) and new back-up rings (Figure 2, Item 8) on bearings
(Figure 2, Item 7) sticking out of hydraulic pump flange (Figure 2, Item 4).
13. Install two new isolation plates (Figure 2, Item 12), new center separator (Figure 2, Item 26), two new
end separators (Figure 2, Item 10), and new sealing strips (Figure 2, Item 11).
14. Install new seal (Figure 2, Item 27), new seal press ring (Figure 2, Item 28), and snap ring
(Figure 2, Item 29).
15. Install new body O-ring (Figure 2, Item 6) in groove in hydraulic pump flange (Figure 2, Item 4).
16. Coat drive gear (Figure 2, Item 25) extension with heavy grease to protect lips of seal
(Figure 2, Item 27).
17. Slide hydraulic pump flange (Figure 2, Item 4) over drive gear (Figure 2, Item 25) extension and seat
against pump body (Figure 2, Item 22). Ensure two dowel pins (Figure 2, Item 5) are in body.
WARNING
Compressed air used for cleaning must not exceed 30 psi (207 kPa).
Use only with effective chip guarding and personal protective
equipment (goggles/faceshield, gloves, etc.). Failure to comply may
result in injury to personnel. Seek medical attention in the event of an
injury.
0034-4
