APPENDIX D: HYDRAULIC SYSTEM BLEEDING

MWO 9-2330-390-35-1

APPENDIX D: HYDRAULIC SYSTEM BLEEDING

This Task Covers: Bleeding

Initial Setup:

Equipment Conditions:

Tools/Test Equipment:

Front and rear dollies lowered and

Suitable lifting device, 5000 lb

detached

capacity minimum.

Materials/Parts:

Hydraulic fluid (MIL-H-5606)

Rags

WARNING

Top beams of front and rear dollies must be secured with a suitable lifting device

throughout entire bleeding procedure if bleeding hydraulic system of a dolly set

with side lift kit when ONLY side lift positioning cylinders were replaced. Top and

bottom beams must also be kept vertical. Until bleeding is complete, air in the

hydraulic system may cause erratic movement when extending and retracting

hydraulic cylinders. Failure to support top beams and to keep tops and bottoms

beams vertical may cause an accident resulting in serious injury or death to

personnel.

CAUTION

DO NOT allow dirt or dust to enter hydraulic reservoir. Damage to hydraulic system

will result.

NOTE

This procedure is used to bleed the hydraulic system of a dolly half without side lift

kit OR a dolly set with side lift kit when only side lift positioning cylinders were

replaced.

BLEEDING

1. Remove safety pin (84) and hitch pin

(85) and unlock pivoting tray lockout

brace (86) from lower bracket (87).

D-1