TM 5-3895-356-14&P
TROUBLE SHOOTING
IF SPRAY FOGS:
Pump speed too fast for size of nozzle. Check "CIRCULATING IN TANK"
page for proper relationship.
IF SPRAY STREAKS:
Pump speed too slow, nozzles not at proper angle; spray bar at
improper height above ground or material temperature too low. Material should
have a Saybolt Furol viscosity from 25 to 60 seconds.
IF SPRAY LACKS PRESSURE.
Pump speed too slow or one of control valves m incorrect position. To
correct valve position, lift control quadrant and turn valve plugs to position
relative to levers as shown on drawing on Page 6. Check discharge strainers.
IF ALL NOZZLES DO NOT CUT
OFF:
position. See Page 27.
IF LEFT CONTROL VALVE LEAKS
Circulating in Bar at too great pump speed.
AT TOP:
IF INTAKE VALVE LEAKS:
Tighten spring on operating shaft. If leak persists, valve may be
scratched or scored and relapping is necessary.
IF NOZZLE VALVES STICK OR
Bar pressure tends to keep them tight. To loosen, rap end of plug stem
LEAK:
To stop leaks, remove valve from bar and lap plug into case
IF QUADRANT LEVER SLOWS
Open butterfly valve by pulling on control link.
PUMP WHEN MOVING FROM "CIR-
CULATE IN TANK" TO CIRCU-
LATE IN BAR":
IF QUADRANT LEVER TURNS
Check relation of Quadrant lever position with nozzle valve lever HARD
WHEN MOVING FROM "CIR-
position as described on page 27
CULATE IN BAR" TO "SPRAY":
IF MATERIAL DOES NOT CIRCU-
Check inner circulating tubes, particularly where they at sections
LATE PROPERLY IN BAR:
IF APPLICATION RATE VARIES:
1. Use measuring stick for accurate readings
2. Tank must be level when reading measuring stick.
3. Check pump tachometer. Each revolution of asphalt pump is 0.61
gallons.
Tachometer head may be checked at speedometer shop. 500 R.P.M. - 204 G.P
M.
29
