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Miscellaneous—Machine
KR46761,0001281 -19-28JUL16-1/1
Bleed Hydraulic System
IMPORTANT: If the hydraulic pump is not lled
with oil, pump will be damaged when
the engine is started.
This procedure should be performed after changing
hydraulic oil, hydraulic oil lter, or pilot oil lter.
Bleed Air From Hydraulic Pump
1. Open right rear service door to access air bleed plugs
(1) on hydraulic pump.
2. Loosen air bleed plugs until oil ows from bleed holes.
3. Purge air and tighten air bleed plugs to specication.
Specication
Air Bleed Plug (2
used)—Torque...............................................................................95 N·m
70 lb·ft
4. Start engine and run for 5—10 seconds to ensure oil
ow to hydraulic pump. Stop engine.
5. Check hydraulic tank oil level. See Check Hydraulic
Tank Oil Level. (Section 3-4.) If necessary, add oil.
See Hydraulic Oil. (Section 3-1.)
6. Start the engine again. Conrm oil level is above
minimum point in hydraulic oil sight gauge. Run
engine for approximately 1 minute to circulate oil
through the system.
Bleed Air From Hydraulic Circuit
TX1218738 —UN—20JUL16
Air Bleed Plugs
1— Air Bleed Plug (2 used)
1. Start engine again. Operate each cylinder and swing
motor repeatedly for 10—15 minutes to purge air from
hydraulic system.
2. Park machine on a level surface with arm cylinder
fully retracted and bucket cylinder (if equipped) fully
extended. Lower attachment to ground.
3. Stop engine.
4. Check hydraulic tank oil level. See Check Hydraulic
Tank Oil Level. (Section 3-4.) If necessary, add oil.
See Hydraulic Oil. (Section 3-1.)
4-1-2
112321
PN=262
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