Weifang 495 - Page 82

2
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3
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4
21
Fig. 20 Injection pump
1-· -.-, Air venting screw; 2-- Locating screw; 3-- Inspection window cover; 4--
Control fork ;5---· Oil lever indicating palte; 6-- Triangular flange; 7-- Rollerbear~
ing; 8-- oil seal; 9-- Camshaft; 10-- Injection pump lower housing; 11-- Control
rod; 12--Tappet and adjusting pad; 13--Check valve; 14--Pump element; IS--
Plunger spring; 16--Injection pump upper housing; 17--Delivery valve; 18--Deliv-
ery valve gasket; 19-- Delivery velve spring; 20-- Delivery velve holder; 21-- Inlet
banjo connection blot.
The· pump element ,delivery ·valve, plunger spring and delivery
valve holder are all installed in the upper housing of the injection
pump. The barrel and the delivery valve seat are pressed tighgtly
together within the upper housing by the delivery valve holder.
The locating screws ~are used to prevent the barrels fro'm rotation.
The air trapped in the upper hous"ing can be vented by loosening
the vent screw. The upper housing together with all parts on it are
fastened on the lower housing with bolts.
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