TM9-2330-390-14&P
4-112. 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 a minimum capacity
of 5000 lb (2270 kg) must be used.
2.
Support top beam (6) with a lifting device as
required.
3.
4.
Start engine (see paragraph 2-20).
Fill hydraulic reservoir (see paragraph 3-7).
NOTE
During extension, maintain slack In hoist sling
as top beam Is raised.
5.
Operate hydraulic control valve to extend lift
cylinders (5) and positioning cylinders (7) In turn
(see paragraph 2-21). Keep top and bottom
beams (6 and 8) vertical as cylinders are
extended.
6.
When full extension is reached, hold lift cylinder
levers (9) and positioning cylinders lever (10) 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 (5) and positioning cylinders (7) in turn
(see paragraph 2-21). Keep top and bottom
beams (6 and 8) vertical as cylinders are
retracted.
8.
When full retraction Is reached, hold lift cylinder
levers (9) and positioning cylinders lever (10) in
retract position for 30 seconds.
4-313
