Maintenance
Maintenance Manual for Crawler Crane
Slightly move the crane forwards before adjusting to concentrate the loose parts of the
crawler on the top of drive sprocket, so that it can be easily adjusted.
(1) Before checking the tension of track pad, clean the track pad first.
(2) The tension of crawler must be adjusted when the machine is on level ground.
Adjustment steps:
a) Remove the guard boards at both right and left sides of driven sprocket.
b) Align the two screw jacks with the axles respectively under natural state.
c) Press the handle of the screw jack slowly to move the axle and driven sprocket forward,
causing space between slide block of driven sprocket and gaskets.
d) After adjusting the crawler to appropriate tension, stop the movement of screw jacks and
fill proper number of gaskets in the space between slide block of driven sprocket and
gaskets.
e) Drive the basic machine forward for some distances straight and check whether the upper
track pad, driven sprockets both sides and the track pad of drive sprocket extend fully and
whether concave occurs between track pads. If it exists, do the steps b)-d) once again,
until no concave occurs after the whole track pad travels some distance straight.
f) Take back the screw jacks at both sides. Mount the guard boards.
4.9.2 Travelling reducer
4.9.2.1 Inspection of oil level of travelling reducer
a) Stop the crane on the level ground and remove the plug of oil level inspection hole.
b) It’s normal if the oil level is higher than the inspection hole. Otherwise, adding gear oil is
required.
c) Screw the plug of oil level inspection hole.
Oil change interval and oil change amount for travelling reducer, please refer to section 6.7.
(1) If oil leakage is found when inspecting the oil level, the operation must be stopped.
Dismantle it to have a look.
(2) The travelling reducer has two independent oil chambers which are not connected
with each other. Therefore, add oil to them respectively.
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