MWO-9-2330-390-35-1
MODIFICATION WORK ORDER
MODIFICATION OF M1022A1 DOLLY SET; POSITIONING TUBE REINFORCEMENT
DECEMBER 2002
MWO-9-2330-390-35-1 - 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.
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