Most engines incorporate three stages of filtration—a screen at the tank and paper-element primary and secondary filters. Filters are rated by the size of particle…
Author: Ed
I'm Ed, a blogger who loves diesel engines. I share tips, reviews, and stories about repairing and maintaining them. Join me on my blog and learn more about the diesel world.
Loss of pressure is the definitive symptom of pump failure, although it would be helpful if manufacturers provided output volume specifications. Before condemning the pump,…
A fuel supply, feed, transfer, or lift (the terms are interchangeable) pump supplies low-pressure fuel to the suction side of the injector pump or unit…
Thus far, we have discussed three types of mechanical fuel systems: air blast, early common-rail, and jerk pump. The last of these systems, and in…
The leather diaphragm should hold 500 mm/H2O of vacuum with a leak-down rate of no more than 2 mm/sec. It should be flexible enough to…
This unit, shown in cross-section in Fig. 5-31, uses a flap, or butterfly, valve (4) as a variable venturi. A tube bleeds vacuum from the…
Pneumatic, or flap valve, governors are less expensive than centrifugal governors and more amenable to repair. The velocity of air moving through the intake manifold…
Governor malfunctions—hunting, sticking, refusal to hold adjustments—can usually be traced to binding pivots. In some cases, removing the cover and giving the internal parts a…
Spark-ignition engines have a built-in governor in the form of a throttle valve that, even wide open, limits the amount of air passing into the…
Regardless of the nozzle type, injectors should • Discharge cleanly without “after-dribble,” which tends to collect in the cylinder between cycles. • Atomize fuel for…