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一.启动机能带动发动机运转，但无发动征兆.

1、 The starting function drives the engine to run, but there are no signs of starting

济南叉车租赁人员认为引起发动机产生这一现象一般是燃料系不良所致，它分低压油路和高压油路，检查时应先确定故障出自哪部分，将喷油泵放气，螺栓松开扳动手油泵看出油情况，若不出油或流出泡沫状柴油说明是低压油路否则就是高压油路故障.

Jinan forklift leasing personnel think that the phenomenon that causes the engine to produce is generally caused by poor fuel system, which is divided into low-pressure oil circuit and high-pressure oil circuit. When checking, you should first determine which part of the fault is from. First, bleed the fuel injection pump, loosen the bolts and pull the hand pump to see the oil condition. If no oil or foam diesel oil flows out, it means that the low-pressure oil circuit is the fault, otherwise it is the fault of the high-pressure oil circuit

(1)低压油路故障

(1) Low pressure oil circuit fault

1.油箱无油：处理方法加油

1. No oil in the fuel tank: treatment method: refueling

2.油管堵塞，处理方法：清理疏通

2. Oil pipe blockage, treatment method: cleaning and unblocking

3.输油泵滤网堵塞，处理方法：清理

3. The filter screen of the oil delivery pump is blocked, and the treatment method is to clean it up

4.油管老化漏气，更换

4. Oil pipe aging and air leakage, replacement

5.柴油滤清器太脏，更换

5. The diesel filter is too dirty, replace it

6.输油泵活塞损坏，更换

6. The piston of the fuel delivery pump is damaged and needs to be replaced

(2)高压油路故障：1.喷油泵不工作，校正2.喷油器不工作校正或更换

(2) High pressure fuel circuit fault: 1. The fuel injection pump is not working, correct it. 2. The fuel injector is not working, correct or replace it

（二）喷油时间过早

（2） Injection time too early

现象

phenomenon

1.汽缸内发生有节奏而清脆的“嘎嘎”金属敲击声

1. There is a rhythmic and crisp "quack" metal tapping sound inside the cylinder

2.发动机过热、无力、冒黑烟

2. The engine is overheated, weak, and emits black smoke

3.怠速不良

3. Poor idle speed

4.不易启动

4. Difficult to start

处理方法

processing method

将固定盘的固定螺钉松开，慢慢延迟喷油时间，直喷油情况好转为止，也可卸下缸高压管转动曲轴注意看喷油泵上出油阀压紧座中的油面，在油面刚刚有微量波动的瞬间，从飞轮上的喷油定时刻度线和飞轮壳上的记号是否重合，看提前角是否符合规定，若不符合规定，再进行调整.

Loosen the fixing screw of the fixed plate and slowly delay the injection time until the injection situation improves. Alternatively, remove the high-pressure pipe of the first cylinder and rotate the crankshaft. Pay attention to the oil level in the pressure seat of the oil outlet valve on the injection pump. At the moment when the oil level just fluctuates slightly, check whether the injection timing mark on the flywheel coincides with the mark on the flywheel housing to see if the advance angle meets the regulations. If it does not, adjust it again

（三）喷油时间过迟

（3） Injection time too late

现象

phenomenon

1.汽缸发生低沉而不清晰的敲击声.

1. The cylinder makes a low and unclear knocking sound

2.发动机转速不能随油门加大而提高

2. The engine speed cannot increase with increasing throttle

3.发动机过热：无力、冒白烟

3. Engine overheating: weak, emitting white smoke

检查连接盘固定螺钉是否松动移位，可将固定盘的固定螺钉松开，慢慢提前喷油时间，直喷油情况好转为止，如调整无效，应检查喷油泵柱塞挺杆上的定时调整螺钉是否失调，若失调重新调整.

Check if the fixing screws of the connecting plate are loose or displaced. You can loosen the fixing screws of the fixing plate and slowly advance the injection time until the injection situation improves. If the adjustment is ineffective, check if the timing adjustment screw on the plunger tappet of the injection pump is misaligned. If it is misaligned, readjust it

（四）发动机无力

（4） Engine weakness

故障原因

Fault cause

1.低压油路供油不足，油箱通气孔堵塞，油管堵塞，破裂接头松动及垫片密封不严。处理方法：找出故障对油路疏通，更换

1. Insufficient oil supply in the low-pressure oil circuit, blocked fuel tank vent holes, blocked oil pipes, cracked joints, loose gaskets, and poor sealing. Solution: Identify the fault, clear the oil circuit, and replace it

2.空气滤清器堵塞而进气不畅，处理方法，更换或清洁滤请器

2. If the air filter is blocked and the intake is not smooth, the treatment method is to replace or clean the filter

3.柴油滤清器堵塞，处理方法：更换

3. Diesel filter clogged, treatment method: replace

4.输油泵供油不足，处理方法：修复或更换

4. Insufficient oil supply of the fuel delivery pump, treatment method: repair or replace

5.燃料系中有空气或水分，处理方法：排除空气或水分

5. If there is air or water in the fuel system, the treatment method is to remove the air or water

（五）运转中突然熄火

（5） Sudden shutdown during operation

现象

phenomenon

1.发动机运转中突然熄火

1. Sudden engine shutdown during operation

2.熄火前无异常症状

2. No abnormal symptoms before stalling

故障原因及处理方法：

Fault causes and handling methods:

1.油箱无油：处理方法：加油

1. No oil in the fuel tank: Treatment method: refueling

2.柴油中混有水或空气，处理方法：排除水或空气

2. Diesel mixed with water or air, treatment method: remove water or air

3.油管堵塞或破裂，处理方法：疏通或更换油管

3. If the oil pipe is blocked or ruptured, the solution is to clear or replace the oil pipe

4.燃油滤清器堵塞，处理方法：更换

4. The fuel filter is blocked. Treatment method: replace it

5.油管接头松动进气，处理方法：挤紧接头排光油路中的空气

5. When the oil pipe joint is loose, the air intake should be treated by squeezing the joint to exhaust the air in the oil circuit

6.输油泵不供油，处理方法：修理或更换输油泵

6. The fuel delivery pump does not supply oil. Solution: Repair or replace the fuel delivery pump

叉车引擎部分会存在的问题，我们就从这几个方面来为您进行了讲解，希望能够给您好的帮助，更多事项就来我们网站http://www.jnhgjx.net咨询！

We have explained the problems that may exist in the forklift engine section to you from these aspects, hoping to provide you with good help. For more information, please come to our website http://www.jnhgjx.net consulting service