JETStream 3000 series - Page 78

Operation Manual
70
PROBLEM POSSIBLE CAUSE REMEDY
Insufcient 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 tting
leakage holes
Damaged ttings or seals Replace the ttings and/or seals
Pump oil leaking
from breather
Check oil level Add oill as necessary
Verify use of proper oil type
See “Oil Specications” 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
rst closes
Engine idle speed too low Increase idle speed
Large gun nozzle Decrease nozzle size
Insufcient 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
Insufcient water ow Adjust water ow
Dirty water Clean/replace lter
Scored/pitted plunger Replace plunger
Gland nut loose Tighten nut