View attachment lifter.bmp
View attachment lifter of FOTON 404.bmp
It is lifter draft control feedback device, when you use the three point link pls adjust the longth of top link, pls check attached pictures.
Adjust lifter
1、Adjust adjusting spring(figure 4.3.8.1)
Before force adjusting spring assembly is installed into lifter housing, it should be adjusted as following: turn relatively upper pull rod connecting joint and spring rod and eliminate the clearance among all parts to ensure the clearance between A face of spring pressure plate and B face of spring rod to be 2 mm. Then insert pin. Besides, install force adjusting spring assembly into lifter housing and screw nut to make front end of force adjusting spring assembly touch E face of lifter housing. Finally, insert pin from nut hole (figure 4.3.8.1).
2、Adjust force adjusting lever and position adjusting cam of lifter (figure 4.3.8.2). Firstly, place handle of adjusting automatic draft and position on the connecting position with cut on the sector plate (i.e. the position that is vertical with base surface of lifter housing) and make the clearance between inner lifting arm and inner surface in the rear of lifter housing be 4 mm. At this time, the included angle between outer lifting arm and base surface of lifter housing is 60ー. Then adjust respectively force adjusting lever and position adjusting cam.
(1) Adjust force adjusting lever
Adjust force adjusting push rod to make force adjusting seal sleeve head touch A face. Then adjust the length of force adjusting push rod to make the clearance between control end G of force adjusting lever and end face of main control valve be 1.5 mm (at this time, main control valve is on the outmost position). After adjust properly, lock nut.
(2) Adjust position adjusting cam
Firstly, make control end of position adjusting lever touch the outmost position of main control valve. Then turn position-adjusting cam and make it touch roller wheel of position adjusting lever assembly. Under the condition of keeping contact between position adjusting lever roller wheel and cam, turn position-adjusting cam in clockwise till control end of position adjusting lever pushes main control valve to the neutral position (i.e. main control valve moves 5 mm inwards from the outmost position). At this time, the distance between control end of force adjusting lever and end face of main control valve is 6.5mm. Then position-adjusting cam is fastened on the lifting shaft by bolts.