Rheem LX2000 Series Installation Instructions Manual page 24

Oil Pump Pressure Problems And
Their Possible Causes
Complaint
Excessive Pressure
Insufficient Pressure
Fluctuating Pressure
No Pressure
24
Check for:
1. Bypass plug in place with a single oil line system
2. Return oil line on two-pipe system clogged, kinked or restricted
3. Pressure regulating valve stuck
4. Oil too heavy
5. Improper pump setting
1. Nozzle size beyond rated pump pressure
2. Pump vapor bound due to high oil line vacuum
3. Nozzle badly worn
4. Pump gears worn
5. Suction line kinked, clogged or restricted
6. Pressure regulating valve worn or stuck in operating position
7. Dirty strainers
8. Dirty line filter
9. Motor does not come up to speed
10. Bad air leak at seal
11. Improper pump setting
1. Pump gears worn
2. Vertical oil lift too great (over 10 feet)
3. Pump strainer or oil line filter partially clogged
4. Bypass plug not in place with two line system
5. Pump vapor bound due to high vacuum
6. Faulty foot or check valve
7. Suction line too small
8. Sticky pressure regulating valve
9. Motor coupling grabbing
1. Pump air bound
2. Loose coupling
3. Oil tank empty
4. Strainer or filter completely clogged
5. Suction line completely restricted
6. Air leaks in suction line
7. Gears badly worn and pump cannot create vacuum to lift oil
8. Badly leaking pump or filter seal
9. Wrong pump rotation
10. Tank vent clogged