STT113 TOWER CRANE OPERATION AND SERVICE MANUAL
9B-6
IV. Operating and maintenance
1. Connect the motor’s main power supply exactly; make the motor wheeling comply
with counter-clockwise (check the motor’s turning by point movement method)
observed from shaft extent direction. Open the cover of the hydraulic air filter and fill
the clean and appointed hydraulic oil from it; connect the hydraulic telescoping
system pipeline according to the hydraulic system elementary diagram and screw
down the joint; test run and notice the hydraulic pump station whether in normal work
condition. The cylinder maybe jogging at beginning, here need to turn left the airbleed
screw at air bleed hole of cylinder and spurt some oil. Operate it several time, if it
didn’t jogging please tighten up the airbleed screw rightward; check the telescoping
flooding valve pressure,(adjustment of telescoping flooding valve is 40Mpa before
leave the factory
，
have no need to adjust in service. But you can adjust demand
pressure depend on need, adjustment of the down flooding valve is 6.5Mpa) namely
be observed the pressure when the cylinder overhanging completely and after it
recovery completely. Finished the above work can put into normal work.
2. Although top up the oil at first time, it reduce and from oil box to the cylinder when
it starting, so should supply the hydraulic oil up to the liquidometer upper limit when
the hydraulic telescoping system bringing into service. Check the hydraulic oil’s
cleanliness termly, general condition, should make check once six month or after
2000 hours. According to specific circumstances, it can also check the oiliness ahead
of time. If the oil is bring and clean use it continue, if the oil is solidification and
feculence please replacing new oil; In order to protect the seal ring of cylinder should
often wipe dunghill on piston rod The hydraulic pump station should be covered with
plastic material after complete work. To protect the water pollute the oilness and
prolong the useful life.
