48
4000599070
E11.16
USA / GB
HA120PX
C
- Maintenance
7.3.3.3 - Evaluation of leaks on hydraulic cylinders
These measures must be taken each time an anomaly has been detected in the hydraulic
cylinder during daily inspection and periodic maintenance checks.
Generic Control :
• Position a load equal to the rated capacity on the cage (or platform).
• Raise the cage (or the platform) using the ground control box. To activate the cylinder to be tested,
proceed as follows :
• Lift Arm hydraulic cylinder : Lift the arm to approximately half full height. The telescopic boom should
be fully extended and in the horizontal position. (For machines fitted with).
• Boom lifting cylinder or Jib cylinder : Lift the concerned equipment (boom or jib) of approximately half
way. Extend the telescope to its maximum.
• Telescoping cylinder : Lift the boom to its maximum angle and telescope approximately 50 cm.
• Measure the distance between the floor of the cage (or of the platform) and the ground.
• Leave the machine in this condition for 15 mn (minutes).
• Measure the distance between the floor of the cage (or of the platform) and the ground.
• If the difference between two measurements does not exceed 4 cm : the test validates correct
operation.
• If the difference between two measurements exceeds 4 cm, contact HAULOTTE Services® or carry
out the additional tests described below.
Control cylinder by cylinder :
• Position a load equal to the rated capacity on the cage (or platform).
• Perform the movement of the concern cylinder to half of its stroke.
• Fix the cylinder with a comparator :
• Attach the body of the comparator on the cylinder rod.
• The needle of the comparator must be in contact with the end of the casing of the cylinder.
• The target is to measure the creep of the cylinder rod.
• If the creep of the cylinder rod is higher than the values indicated in the table below, replace the
cylinder.
Type of cylinders
Maximum drift authorised due to an internal leak of the cylinder
Lift cylinder arm or boom (Machine with
working heights > 26 m(85 ft4 in))
After 10 mn, creep < 0,2 mm
After 60 mn, creep < 1 mm
Outriggers cylinder, Oscillating axle locking,
Lift cylinder arm or boom (Machine with
range-limiting system)
After 10 mn, creep < 0,5 mm
After 60 mn, creep < 2,5 mm
Lift cylinder arm or boom, Telescoping,
Compensation, ...
After 10 mn, creep < 1 mm
After 60 mn, creep < 6 mm
Steering cylinder
After 10 mn, creep < 1,5 mm
After 60 mn, creep < 9 mm
Summary of Contents for HA120PX
Page 1: ...Maintenance book HA120PX 4000599070 E11 16 USA GB Maintenance book HA120PX ...
Page 2: ...2 4000599070 E11 16 USA GB HA120PX ...
Page 14: ...14 4000599070 E11 16 USA GB HA120PX A Safety precautions Notes ...
Page 50: ...50 4000599070 E11 16 USA GB HA120PX C Maintenance Notes ...
Page 52: ...52 4000599070 E11 16 USA GB Control Oil change Wheel reducer E002 15 mn Notes ...
Page 54: ...54 4000599070 E11 16 USA GB Replacement Hydraulic filter cartridge E003 15 min Notes ...
Page 56: ...56 4000599070 E11 16 USA GB Filling up Oil change Fuel tank E004 15 mn Notes ...
Page 64: ...64 4000599070 E11 16 USA GB Replacement Tightening Wheel E006 15 min Notes ...
Page 66: ...66 4000599070 E11 16 USA GB Tightening Screws bolts and nuts E007 15 min Notes ...
Page 72: ...72 4000599070 E11 16 USA GB Control Filling up Battery charge Battery E018 10 min Notes ...
Page 74: ...74 4000599070 E11 16 USA GB Changing glow plugs Glow plugs E030 30 mn Notes ...
Page 78: ...78 4000599070 E11 16 USA GB HA120PX D Diagnosis assistance Notes ...
Page 90: ...90 4000599070 E11 16 USA GB HA120PX E Electric circuit Notes ...
Page 100: ...100 4000599070 E11 16 USA GB HA120PX F Hydraulic circuit Proportional unit Diagram extract ...
Page 107: ...1 4000599070_USA_GB_e11 16 Electrical diagram HA120PX 1 HA120PX 1 1 FOLIO 1 7 ...
Page 108: ...2 Electrical diagram HA120PX 1 2 FOLIO 2 7 ...
Page 109: ...3 Electrical diagram HA120PX 1 3 FOLIO 3 7 ...
Page 110: ...4 Electrical diagram HA120PX 1 4 FOLIO 4 7 ...
Page 111: ...5 Electrical diagram HA120PX 1 5 FOLIO 5 7 ...
Page 112: ...6 Electrical diagram HA120PX 1 6 FOLIO 6 7 ...
Page 113: ...7 Electrical diagram HA120PX 1 7 FOLIO 7 7 ...
Page 114: ...8 Electrical diagram HA120PX ...
Page 116: ...2 HYDRAULIC DIAGRAM HA120PX ...