Appendix E: CONVERTING THE MSU-1 MOBILE SUPPORT UNIT FROM MIL-H-5606 TO MIL-H-83282 HYDRAULIC FLUID

TB 55-1500-334-25

APPENDIX E

CONVERTING THE MSU-1 MOBILE SUPPORT UNIT FROM

MIL-H-5606 TO MIL-H-83282 HYDRAULIC FLUID

E-13. Start unit as shown in TM paras 3-9 and 310.

E-1. To drain pressurized fluid from accumulator open

NOTE Do not use buddy start system during flushing

the hand pump bypass valve as shown in TM 55-1730-

procedures.

216-14, para 3-4(d), page 38 and allow the accumulator

fluid to return to the reservoir. Close the bypass valve

after fluid has passed to the reservoir.

E-14.

Perform steps specified in TM para 3-18,

Preparation for Hydraulic Service. Set volume control

E-2. To drain reservoir. open drain valve at bottom.

for 10 gallons per minute and compensator for 1500 psi.

E-3. Drain hydraulic system components as shown in

E-15. Close high pressure bypass valve, open flushing

TM para 2-1(9)(b), page 33.

manifold valve, and operate the stand for five minutes

in the flushing mode.

E-4. Drain high pressure filter, pump case filter, and

start system filter.

E-16. Close flushing manifold valve. Operate stand in

this mode for 30 seconds. Open high pressure bypass

E-5. Reassemble filters, replace all plugs and caps

valve. Operate stand in this mode for one minute.

removed per para E-3, and close reservoir drain valve.

E-17. Prepare stand for propulsion mode as shown in

E-6. Fill reservoir with 10 gallons of MIL-H-83282

TM para 3-30, page 43, do not engage drive pins.

hydraulic fluid.

Operate stand with control lever on tongue in full

forward position for two minutes, then in full reverse

position for two minutes.

E-7. Refill high pressure pump case per TM para 2-

1(9)c, NOTE, page 33.

E-18. Return propulsion selector valve to HYDRAULIC

OUTPUT position.

E-8. Place reservoir selector valve in "SERVICE UNIT

RESERVOIR" mode.

E-19. Shut down stand.

E-9. Connect pressure hoses and fill hose and flushing

E-20. Repeat steps E-1 thru E-19 twice.

manifold to test stand ref TM para 3-18, page 41. Open

fill hose shut off valve.

E-21. Drain stand see steps E-1 thru E-5. Refill

reservoir with 15 gallons of MIL-H-83282 hydraulic fluid.

E-10. Use hand pump, to pump the accumulator up to

at least 2000 psi.

E-22. Refill high pressure pump case per step E7.

E-11. Set pump volume control for maximum, depress

E-23. Circulate fluid through stand as shown in steps E-

start handle and hold until oil appears in the sight tube

10 and E-11.

ref TM para 3-7, page 39.

E-12. Pump the accumulator up to at least 2000 psi.

E-1/(E-2 blank)