Page
29
PROBLEM
POSSIBLE CAUSE
SUGGESTED ACTION
Knock In Power End.
1. Improper main bearing
1. Check and adjust
clearance.
clearances.
2. Incorrect pump rotation.
2. Reverse rotation.
3. Loose plunger coupling.
3. Check and tighten. Replace
if damaged.
4. Loose bearing housings/
4. Check and tighten.
covers.
Replace if damaged.
5. Worn crosshead pin.
5. Replace.
6. Worn crosshead pin bushing. 6. Replace.
7. Worn connecting rod to
7. Replace.
journal bearing.
8. Worn crankshaft.
8. Replace.
9. Worn crosshead.
9. Replace.
10. Worn main bearing.
10. Replace.
11. Valve noise transmitted to
11. See Excessive Valve
power end.
Noise problem.
12. Cavitation noise transmitted 12. See Cavitation, Fluid
to or causing shock loading in Knock or Hammer problem.
power end.
Excessive Valve Noise.
1. Pump cavitation.
1. See Cavitation, Fluid Knock
or Hammer problem.
2. Seal on inserted valve
2. Replaced seal or valve.
damaged or missing.
3. Broken/weak valve spring(s)
3. Replace spring(s).
Oil Leakage From
1. Worn, damaged or corroded.
1. Replace extension rod.
Stop Head.
extension rod.
2. Worn oil stop head seal.
2. Replace seal.
3. Oil level too high.
3. Reduce oil level.
4. Excessive crosshead wear.
4. Replace crosshead.
5. Pressure in crankcase.
5. Clean or replace air breather.
6. Misalignment in front.
6. Loosen bolts and center.
crosshead guide cover.
Содержание HD-2250
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