25
(a) Check brake drum to see whether there is destructive abrasion.
(b) Check brake shoe for abrasion,if it can not reach the operating requirement,replace the
brake shoe at once.
(c) Check whether the axle shell is normal,if the oil level is less than normal,supplement the
oil
⑤
Technical maintenance semiannually replace gear oil of axle shell once every a half year
⑥
Technical maintenance yearly Disassembly checkonce a year.
⑦
Check and debug requirement during installation
When renew drive axle wheel hub,becareful for regulating adjustor to make optimum
clearance between brake drum and friction slice equals 0.3mm
～
0.5mm. Infuse 100ml 3#
lithium-base lubricate greese into taper roller bearing of wheel hub.
Adjusting for clearance of wheel hub: Tighten lock nut until brake drum of wheel hub can only
rotate slightly. Then reverse lock nut 1/8 circle, at this time, the brake drum can rotate freely
without seizing-up, also without axial motion and deflexion. Now you can place retainer washer
and tighten lock nut.
3. Steering system
3.1 Summary
Steering system
（
see figure 2-33
）
consists mainly of steering wheel,steering shaft,steering
device,steering oil pump and steering axle and so on. Steering shaft connects to steering device
by universal joint. connecting shaft connects,with universal joint,to steering wheel. the steering
limp can tilt forward and backward to a proper position. steering axle,installed on the tailbracket of
the rear of the framework,has a kunckle on both left and right side. Kunckle is pulled by steering oil
cylinder through connecting rod,which makes steering wheel to turn and achieves turning.
figure 2-33 Steering operation device
3.2 Full Hydraulic cycloid redirector
Full Hydraulic redirector(figure 2-34) can transfer pressure liquid from pump to oil cylinder
according to rotatory angle of steering wheel. When hydraulic system failure, steering operation
can be done by manpower.
The redirector consists of a normal redirector and a assembled valve, there is a safety valve
which located in the hole of top cover of assembled valve, also there is a two-way overloading
