184
SJ1044 TH, SJ1044 THS, SJ1056 TH, SJ1056 THS, SJ1256 THS
230790ABA
Section 5 – Procedures
Non-Routine Maintenance
5.6-9 Bleeding Hydraulic Circuits
NOTE
Whenever a hydraulic system is opened up, it
is necessary to bleed or purge the air from the
circuit that was opened.
Bleed Carriage Tilt Circuit
1.
Tilt carriage to full forward position.
2.
Raise boom fully while extending boom to keep
carriage ahead of the front tires.
3.
Tilt carriage to full backward position.
4.
Lower and retract boom fully.
5.
Tilt carriage forward as much as possible and
raise boom to facilitate tilting carriage fully
forward.
6.
Repeat steps 1 through 5, five times
7.
Check for air in the system by leveling forks and
raising and lowering the boom several times while
watching the forks to see if they stay level. If the
forks do not stay level repeat above steps and
re-check.
Bleed Boom Extend/Retract Circuit
▪
Fully extend and retract boom several times with
boom level.
Bleed Boom Raise/Lower Circuit
▪
Fully raise and lower the boom several times.
Ensure carriage remains ahead of the front tires.
Bleed Frame Level Circuit
▪
Tilt telehandler fully side to side several times with
boom in a low position.
Bleed Auxiliary/Optional Circuits
▪
Operate function fully in both directions several
times.
Bleed Outriggers Circuit
▪
Fully lower and raise outriggers several times.
Bleed Brake Circuit
1.
With engine running depress and hold brake
pedal. The hydraulic pump will constantly supply
fluid; there is no need to pump the brake pedal.
2.
Locate bleeder fittings on top of brake calipers at
each wheel.
3.
Starting with the fitting furthest from the pedal and
working your way to the closest, slightly open
each bleeder and close when hydraulic oil comes
out clear.
4.
Slowly loosen hose fitting at pressure switch
shuttle valve on left frame rail. Tighten when fluid
comes out clear.
Summary of Contents for SJ1044 TH
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