HELI H2000 Series, Руководство пользователя

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The hydraulic circulation system of the main circuit is complicated with the hydraulic The hydraulic circulation system of the main circuit is complicated with the hydraulic
circu circu it it for power for power steer steer ing.T ing.T he he hydra hydra ulic piping is ulic piping is of of O-rin O-rin g g fittin fittin g g type with type with excel excel lent lent
sealing performance,providing secure oil tightness. sealing performance,providing secure oil tightness.
The hydraulic oil sent from the rear main pump flows directly to the control The hydraulic oil sent from the rear main pump flows directly to the control
valve,while the hydraulic oil sent from the front main pump is divided by valve,while the hydraulic oil sent from the front main pump is divided by the flow divider the flow divider
valve in two portions for steering and load handling operation. valve in two portions for steering and load handling operation.
The hydraulic oil for load handling flows into The hydraulic oil for load handling flows into the control valve and mingles with the control valve and mingles with the the
hydraulic oil from the rear main pump.With the control valve in neutral position,the oil hydraulic oil from the rear main pump.With the control valve in neutral position,the oil
returns to the oil tank,passing throug returns to the oil tank,passing throug h the valve. h the valve.
When the lift lever is pulled,the hydraulic oil from the control valve flows through the When the lift lever is pulled,the hydraulic oil from the control valve flows through the
flow regulator valve and reaches the lower part of the lift cylinder piston to push up the flow regulator valve and reaches the lower part of the lift cylinder piston to push up the
piston rod.When the lift lever is pushed,the circuit between the lower part of the lift piston rod.When the lift lever is pushed,the circuit between the lower part of the lift
cylin cylin der piston and the der piston and the oil tank is oil tank is opene opene d,an d,an d the d the pisto pisto n begins to n begins to desce desce nd due nd due to the to the
weight of the piston rod,lift bracket,forks,etc.In this case,the oil returning to the control weight of the piston rod,lift bracket,forks,etc.In this case,the oil returning to the control
valve is regulated by the flow regulator.When the tilt lever is operated,the hydraulic oil valve is regulated by the flow regulator.When the tilt lever is operated,the hydraulic oil
from the main pump reaches one side of the piston to push it.The oil pushed by the piston from the main pump reaches one side of the piston to push it.The oil pushed by the piston
returns to the oil tank through the control valve. returns to the oil tank through the control valve.
7.8 maintenance 7.8 maintenance
7.8.1 Disassembly of control valve 7.8.1 Disassembly of control valve
Dismount the control valv Dismount the control valv e from the machine and clean exterior of it. e from the machine and clean exterior of it.
(1) (1) Remove the fitting Remove the fitting bolts and sep bolts and sep arate the control arate the control valve into each valve into each section.Don’t section.Don’t
lose the check valves and springs arranged at the joint sections. lose the check valves and springs arranged at the joint sections.
(2) (2) Remove the screws Remove the screws at the plunger hea at the plunger hea d side and the d side and the bolts with hex.G bolts with hex.G roove at the roove at the
cap side,and remove the wiper,O-ring and seal plate from the valve housing together with cap side,and remove the wiper,O-ring and seal plate from the valve housing together with
plunger. plunger.
(3) (3) Put the plun Put the plun ger on ger on the vice and remov the vice and remov e e the cap screw the cap screw .An .An d d the the n n rem rem ove the ove the
springs and spring seats.On the plunger provided with a tilt lock,remove also the spring springs and spring seats.On the plunger provided with a tilt lock,remove also the spring
and poppet in the plunger. and poppet in the plunger.
7.8.2 Reassembly of control valve 7.8.2 Reassembly of control valve
Using mineral oil,clean all the Using mineral oil,clean all the disassembled parts.Check them for burrs or nicks,and disassembled parts.Check them for burrs or nicks,and
replace as necessary.The valve housing and plunger,and the plunger and poppet are replace as necessary.The valve housing and plunger,and the plunger and poppet are
assembled by wrapping.If replacement is needed,replace as assembly. assembled by wrapping.If replacement is needed,replace as assembly.
(1 (1 ) ) Fa Fa st st en en th th e e pl pl un un ge ge r r wi wi th th vi vi ce ce ,a ,a nd nd in in st st al al l l th th e e po po pp pp et et an an d d sp sp ri ri ng ng in in th th e e
plunger,observing the direction of poppet. plunger,observing the direction of poppet.
(2) (2) Insta Insta ll ll the O-ring,w the O-ring,w iper, iper, seal plate,s seal plate,s pring seat,s pring seat,s pring and pring and sprin sprin g g seat in seat in this this
order to the plunger end side,a order to the plunger end side,a nd tighten them with cap screw to the torq nd tighten them with cap screw to the torq ue of 25 to 32N.m. ue of 25 to 32N.m.
(3) (3) Inser Inser t the assemble t the assemble d plunger into the valv d plunger into the valv e housing and fit the cap by the bolt e housing and fit the cap by the bolt
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