TM 5-3805-281-24-1
Operational Checkout Procedure
9005
10
3 HYDRAULIC SYSTEM CHECKS
12
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HYDRAULIC OIL TANK
Raise boom to full height, then lower boom to ground.
YES: Go to next check.
NOTE: Ensure that engine is properly shut down.
CHECK
NO: Replace cap.
Slowly loosen vent plug on hydraulic oil tank.
Is air heard escaping from vent plug?
NOTE: The pressurized hydraulic oil tank creates
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pressure at the inlet to the hydraulic pumps. If filler cap
does not seal, hydraulic pumps could cavitate and be
damaged.
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HYDRAULIC OIL LEVEL
YES: Go to next check.
CHECK
NO: Add hydraulic oil so
level is between marks on
window. Go to Group
9000-04.
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UN19OCT88
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UN03OCT90
Park machine on a level surface.
Extend bucket cylinder.
Retract arm cylinder.
Lower boom so bucket is on the ground.
Check the hydraulic oil level.
Is oil level between the marks on hydraulic oil level window?
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