Lovol 1004-4, User Handbook Manual, Page: 64 / 87

Notices on Adjustment and Use of PB Pump
1. Important adjustment of the pump should be carried out on special test bench according to the technical
documents. And wrong adjustment may cause heavy accidents.
2. When adjust the pump, the temperature of proving oil and diesel should be kept with the range of 35
℃
and 40
℃
.
3. When adjusting the pretravel, washers of the same thickness should be placed on either side of the plunger.
Otherwise the drawbar will not move smoothly and vibrate, and other malfunction will also occur.
4. The plunger, fuel outlet valve and nozzle coupling elements are of special accuracy, which may be destroyed by
any dust in the fuel. Therefore, the fuel filter and fuel tank should be cleaned periodically to keep the fuel clean.
Forced or splashing lubrication system is applied on the PB pump. In the former case, lubricant need not be filled
at the pump side. However in the two cases, before running the pump (before being mounted on the test bench or
engine), lubricant specified by the engine manufacture should be filled into the pump body until it begin to flow
out of the overflow outlet. If the lubricant is not filled, the bearings, camshaft and pushing rods may be
destroyed.
10.07