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2 Compression is insufficient.
Leaking valves.
9 Bad valve and excessive wear
of rings, pistons and liners
cause insufficient compres-
sion. Replace with new parts.
9 Grind valves.
2 Fuel is insufficient.
9 Check fuel system.
2 Overheating of moving parts.
9 Check lubricating oil system.
9 Check to see if lubricating oil
filter is working properly.
9 Check the filter element for
impurities which would cause
poor lubrication. Change ele-
ment if necessary.
9 Check the clearance of bear-
ings are within factory specs.
9 Check injection timing.
9 Adjust timing 0.366 rad (21°)
before top dead center.
2 Valve clearance is incorrect.
9 Adjust to proper valve clear-
ance of 0.145–0.185 mm
(0.0057–0.0072 in) with en-
gine cold.
2 Air filter is dirty.
9 Clean the element every 100
hours of operation.
2 Fuel injection pressure is incor-
rect.
9 Adjust to proper pressure.
13.7 Mpa (140 kgf/cm
psi)
2 Injection pump wear.
9 Do not use poor quality fuel
as it will cause premature
wear of the injection pump.
Only use No.2-D diesel fuel.
9 Check the fuel injection pump
element and delivery valve as-
sembly and replace as neces-
sary.
– 99 –
3 压力不足，阀门漏液。
9 阀门不良，环、活塞和衬垫的过
度磨损都会造成压力不足。 请更
换这些部件。
9 研磨阀门
3 燃油不足
9 检查燃油系统
3 运动部件过热
9 检查润滑油系统
9 查看润滑油过滤器是否工作正
常。
9 检查过滤器元件上是否附有会使
润滑效果不良的不纯物， 需要时
更换元件。
9 检查轴承间隙是否符合厂家所定
标准。
9 检查加油时机。
9 调节加油时机至活塞头到达中心
之前的 0.366rad(21°)时。
3 阀门间隙不正确
9 发动机冷却后，将阀门间隙调节
至 0.145－0.185mm(0.0057－
0.0072 in)之间。
3 空气过滤器变脏
9 每隔 1 0 0 小时运转时间便应清
洁空气过滤器。
3 注油压力不正确
9 调 节 至 正 常 压 力 1 . 3 7 M p a
(140kgf/cm
3 注油泵磨损
2
9 请不要使用低质燃油，否则会过
; 1991
快磨损注油泵。应仅使用 No.2-
D 柴油。
9 检查加油泵部件及输出阀门组
件，需要时进行更换。
2
, 1991psi)
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