72
horizontal load shall be on the side rollers. Two cylinders are installed on the carriage.
The end of the piston rod of one cylinder is fixed on the left fork, while the end of the
piston rod of the other cylinder installed on right fork. The space adjustment are
controlled by the operating lever. Lubricate the lower beam and the big shaft to reduce
the friction while adjust the fork space.
Fig.9.4 Space-adjusting Carriage
9.2 Maintenance and Lubrication
(1) Moving parts of main roller and side roller of inner and outer masts need to be
lubricated with grease.
(2) Carry out following work every 50 hours
Clean and lubricate the main roller and side roller of hoist system, chain of
lifting cylinder and chain wheel shaft at the top of mast. Ensure that lubricating oil or
grease is injected to special parts connected with the abovementioned components to
avoid the roller and pin being stuck.
Check and lubricate the mast and frame. Check if there are any abnormalities at
the connections between the tilting cylinders and mast or cylinders and frame.
(3) Carry out following work every 400 hours
Check carefully if the rollers and sheaves are working normally. Check if there is
any distortion, abnormal wearing or cracking of welding seams on whole mast,
carriage and fork structure. Attention shall be paid especially to the firmness of all
Side roller
Main roller
Space-adjustment cyl.
Lower beam
Shaft
To Next Page
