Etnyre Black-Topper, Эксплуатация Обслуживание Безопасность

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80
Maintenance
Servicing the Etnyre P-15 Pump
Vacuum Check
1. Flush pump with 3 quarts of diesel fuel through
fill line.
2. Set controls for loading operation.
3. Install vacuum gauge in fill line cap.
4. Operate pump at 140 GPM on pump tachome-
ter. A vacuum reading of less than 5 inches Hg.
(inches of mercury) after 2 minutes of operation
indicates a vacuum leak or a worn pump.
Pump Disassembly and
Inspection
1. Remove 20 capscrews from perimeter of pump
end plate (see Figure 32).
2. Install two capscrews in the threaded holed near
the outer edge of the end plate at approximately
the 5 o’clock and 11 o’clock positions. Tighten
the capscrews evenly to force the endplate away
from the pump body.
3. Remove the endplate, impeller shafts and im-
pellers (gears) as an assembly.
4. Clean the interior of the pump case. Slide your
fingers across the interior surfaces of the case. If
a narrow raised area can be felt midway between
the front and the rear of the case, the entire pump
should be replaced.
5. If there is no raised area, measure the bore of
the case at its widest point horizontally (side-
to-side). This measurement must not exceed
9.910 inches.
6. Next, measure the case bore vertically at a point
2.8 inches from each side. The vertical measure-
ment must not exceed 5.660 inches. If any bore
measurements exceed these limits, the entire
pump must be replaced.
7. If inspection indicates the pump case is accept-
able, measure the outside diameter of the impel-
ler gears. Measure the impeller gears from tooth
point to tooth point on teeth directly opposite
each other. The minimum outside diameter of
the gears should be 5.635 inches. The minimum
length of the gears should be 3.628 inches.
8. If any impeller gear is undersize, the entire four-
gear set must be replaced.
9. End plate gasket thickness should be 0.014 to
0.016 inches.
10. Divider plate thickness should be 0.127 to
0.128 inches.
Impeller Installation and Pump
Assembly
Each impeller gear set uses a series of dots on the
gear faces to indicate position of the gears within
the pump. Refer to Figure 95 for proper positioning
of the gears. The dots must face away from the
divider plate (towards the ends of the pump). Install
the impellers in numerical order.
Figure 94. Etnyre Asphalt Pump