
Operation Manual
70
PROBLEM
POSSIBLE CAUSE
REMEDY
Insufficient water
lubrication
Needle valves not properly adjusted Adjust the needle valves
Air in the system
Open the manifold drain with
pump on
Plugged lines
Remove debris from lubrication
lines
Leakage from
pump
manifold uni-valve
leakage holes
Damaged valve seal
Replace seals
Leakage from
discharge fitting
leakage holes
Damaged fittings or seals
Replace the fittings and/or seals
Pump oil leaking
from breather
Check oil level
Add oill as necessary
Verify use of proper oil type
See “Oil Specifications” on page
62
Water in pump oil
Cross head oil seal leak
Replace seal
Cold oil
Continue to run until oil temp in-
creases to adequate temperature
Engine will not
return to idle when
control gun dump-
ing
Excessive hose back pressure
Reduce hose string length
Throttle control piston sticking
Repair throttle control unit
Engine will not
increase in speed
when control gun
first closes
Engine idle speed too low
Increase idle speed
Large gun nozzle
Decrease nozzle size
Insufficient water
lubrication
Needle valves not properly adjusted Adjust the needle valves
Air in the system
Open the manifold drain with
pump on
Plugged lines
Remove debris from lubrication
lines
Poor packing life
Hot water
125°F max
Insufficient water flow
Adjust water flow
Dirty water
Clean/replace filter
Scored/pitted plunger
Replace plunger
Gland nut loose
Tighten nut
Содержание 3000 series
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