MWO-9-2330-390-35-1 HMMWV M1022A1 Dolly Set Positioning Tube Reinforcement Download
Page 44 of 48
MWO 9-2330-390-35-1 D-2 APPENDIX D: HYDRAULIC SYSTEM BLEEDING (Con’t). NOTE • If bleeding hydraulic system of a dolly set with side lift kit, when ONLY side lift positioning cylinders were replaced, top beams must be supported by a suitable lifting device capable of raising 16 ft (4.9 m) above the floor. A sling with minimum capacity of 5000 lb (2270 kg) must be used. 2. Support top beam (1) with a lifting device as required. 3. Start engine. 4. Fill hydraulic reservoir. NOTE • During extension, maintain slack in hoist sling as top beam is raised. 5. Operate hydraulic control valve to extend lift cylinders (73) and positioning cylinders (2) in turn. Keep top and bottom beams (1 and 3) vertical as cylinders are extended. 6. When full extension is reached, hold lift cylinder levers (56) and positioning cylinders lever (71) in extend position for 30 seconds. NOTE • During retraction, maintain slack in hoist sling as top beam is lowered. 7. Operate hydraulic control valve to retract lift cylinders (73) and positioning cylinders (2) in turn. Keep top and bottom beams (1 and 3) vertical as cylinders are retracted. 8. When full retraction is reached, hold lift cylinder levers (56) and positioning cylinders lever (71) in retract position for 30 seconds.