Haulotte Group HT21RT O, Maintenance Book

Page: 83 / 282

83 4000511390 E03.16 USA / GB
General data
Cylinder inspection
MS0003
• 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
(7874 µ in) After 60 mn, creep < 1 mm
(0.039 in)
Outriggers cylinder, Oscillating axle locking,
Lift cylinder arm or boom (Machine with range-
limiting system)
After 10 mn, creep < 0,5 mm
(0.01196 in) After 60 mn, creep < 2,5 mm
(0.098 in)
Lift cylinder arm or boom, Telescoping,
Compensation, ... After 10 mn, creep < 1 mm
(0.039 in) After 60 mn, creep < 6 mm
(0.236 in)
Steering cylinder
After 10 mn, creep < 1,5 mm
(0.059 in) After 60 mn, creep < 9 mm
(0.354 in)
These tests must be made in conditions of equivalent temperatures.