Haulotte Compact 8 Maintenance Book page 55

General data
Cylinder inspection
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
Lift cylinder arm or boom (Machine with
working heights > 26 m(85 ft4 in))
Outriggers cylinder, Oscillating axle
locking, Lift cylinder arm or boom
(Machine with range-limiting system)
Lift cylinder arm or boom, Telescoping,
Compensation, ...
Steering cylinder
These tests must be made in conditions of equivalent temperatures.
4001012670
Maximum drift authorised due to an internal leak of the cylinder
After 10 mn, creep < 0,2 mm (7874 µ in) After 60 mn, creep < 1 mm (0.039 in)
After 10 mn, creep < 0,5 mm (0.01196 in) After 60 mn, creep < 2,5 mm (0.098 in)
After 10 mn, creep < 1 mm (0.039 in)
After 10 mn, creep < 1,5 mm (0.059 in)
E 06.20
MS0003
After 60 mn, creep < 6 mm (0.236 in)
After 60 mn, creep < 9 mm (0.354 in)
USA / GB 55