伊顿培训教材

Steering wheel turns freely with no feeling of pressure and no action on the steered wheels
L T
R P
p Fixed Pump Filter Reservoir
Engine
PROBLEM 8 - FREE WHEELING
油缸活塞密封圈失效或油缸线管路、油口泄露
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Q
Piston Seal Leak
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PROBLEM 5: 转向沉
A：暂时性的转向卡死或转向沉
1. 热冲击 – 油液温度与转向 器温度相差10摄氏度以上 2.转向器内部节流口被堵 塞
3、溢流安全阀或双向缓冲阀卡滞，一部分压力油 经过溢流安全阀或双向中缓冲阀泄漏回油箱， 使油压降低
Vehicle veers slowly in one direction.
PROBLEM 3: DRIFT
Vehicle veers slowly in one direction.
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 – 转向控制不准确或车辆走“S”型路线
车辆不能沿直线行使
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Vehicle will not stay in a straight line.
1.检查系统是否有气穴现象产生
2.系统管路接头处有密封不好， 有进气现象 3. 4. 油箱液位低 油缸与铰链联结处出现磨损
Filter
L
T
R P
p PFC Pump Engine
Reservoir
PROBLEM 3: 跑偏-朝一个方向
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Problem 2 - WANDER
Steering wheel turns freely with no feeling of pressure and no a P
p Fixed Pump Filter Reservoir
Engine
PROBLEM 8 - FREE WHEELING
Steering wheel turns freely with no feeling of pressure and no action on the steered wheels
L T
R P
p Fixed Pump Filter Reservoir
Engine
PROBLEM 8 - FREE WHEELING
5、人力转向单向阀关闭不严 6、双向缓冲阀弹簧折断； 3. 转向柱与转向器联结 块联结干涉
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4. 如果是负荷传感 系统确保信号油管没 有堵塞或太细
LS
CF EF
2. 转向系统 安全阀是否工 作正常
p PFC Pump Filter Reservoir Engine
1. 检查泵是否容积效率下降或出 现故障 7、溢流安全阀弹簧弯曲变形。因此油泵来油或通过人力转向单向阀缝隙 流回油箱，或通过双向缓冲阀、溢流安全阀直接回油箱
Steering wheel turns freely with no feeling of pressure and no action on the steered wheels
L T
R P
p Fixed Pump Filter Reservoir
Engine
PROBLEM 8 -方向打空
打方向时感觉很轻松但没有转向动作发生
Prepared by Kong Zhen. Eaton Corp. Customer Service
STEERING TROUBLESHOOTING转向系统的故障判定与排除
How do you troubleshoot a steering system? - Reference Handout # 7-207
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
Filter Reservoir
10 F
L T R P
p Fixed Pump Engine
- 40 F
PROBLEM 6: 奇怪的转向动作
转动方向盘时若液压缸时动时不动且发出不规则的响声
1. 系统中有气体—回油油管应在 液面以下 应打开油箱盖查看油箱中是否有泡沫，如有先 检查吸油箱中有无漏气处，再检查各管路连接 处是否完好，并排除系统中的空气 2. 3. 转向油缸联结处松动 热冲击
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
PROBLEM 3: DRIFT
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STEERING COMPONENTS
Char-Lynn
Steering Control Unit
Components
Gerotor Set Drive Shaft Control Spool Control Sleeve
Centering Pin
Housing
PROBLEM 1 -
转向沉或转向失灵
PROBLEM 8 – 方向打空
Steering wheel turns freely with no feeling of pressure and no action on the steered wheels
L T
R P
p Fixed Pump Filter Reservoir
Engine
PROBLEM 8 - FREE WHEELING
如果出现这种问题，我们应该如何查找原因呢？ What do you look for?
1.
检查系统是否有气穴现象产生
检查泵的吸油口和入口过滤之间
的管路是否有堵塞和打结
检查吸油滤油器或入口过滤 是否污染或堵塞
气穴现象
气穴现象
气穴现象的危害
PROBLEM 2:转向控制不准确或车辆走“S”型路线
Vehicle will not stay in a straight line.
Steering wheel turns freely with no feeling of pressure and no action on the steered wheels
L T
R P
p Fixed Pump Filter Reservoir
Engine
PROBLEM 8 - FREE WHEELING
C：若慢转方向盘轻或快转方向盘沉，则可能是液压泵供油量不足引起的。 在油位高度及粘度合适的前提下应检查液压泵工作是否正常， 如液压泵供油量小或压力低则应更换及修复 D：若空负荷或轻负荷转向轻而重负荷 转向沉重，则可能是阀块中溢流阀压力 低于工作压力或溢流阀芯被脏物卡住 或弹簧失效或密封圈损坏而导致的。 应首先调整溢流阀工作压力，在调整无 效时分解清洗溢流阀，如弹簧失效、 密封圈损坏应换新
p Fixed Pump Filter Reservoir Engine
L
T
R P
4、油缸泄漏
PROBLEM 7: 转向感觉柔软
例如：转向中遇到路障冲击时会出现转 向摆动、方向控制不住
最有可能的原因是油缸低 压区有进气泄露点
L T
R P
p Fixed Pump Filter Reservoir Engine
10 F
L T R P
p Fixed Pump Filter Reservoir Engine
- 40 F
PROBLEM 5: 转向沉
B：若快转或慢转时方向盘均沉重且转向无压力，则可能是1、油箱液面低；2、油液粘度 太大；3、阀体内单向阀失效。首先检查油箱油位及液压油的粘度，如果油位低于标准高度 则添加液压油，如油液粘度太大则应更换粘度合适的液压油，如油位粘度正常则应分解转 向器。若阀体内单向阀钢球丢失则装入新钢球，若有脏物卡住钢球应进行清洗，若单向阀 密封带与钢球接触不良应用钢球冲击之，使其密封可靠。
Steering wheel turns freely with no feeling of pressure and no action on the steered wheels