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Condition Possible Cause Correction
Machine aerates, but aeration Low accumulator pre-charge or
Charge accumulator with dry Ni-
hole depth is shallow or inconsis-
damaged accumulator - TEST
trogen. Rebuild or replace accu-
tent (continued).
NO. 1.
mulator if necessary.
Low water system pressure AND
Rebuild pump.
flow - TEST NO. 2.
Low water system pressure (flow is
NOTE: When testing, make sure
OK) - TEST NO. 2.
cam is not holding water valve
open - rotate gear so cam is off of
valve lifter.
If water is exiting relief valve out-
let hose, replace relief valve. DO
NOT attempt to adjust.
Rebuild water valve.
Low water system flow (pressure is
Check engine speed and correct
OK) - TEST NO. 2.
if necessary.
Rebuild pump.
Improper water valve lift - TEST
Perform valve lift adjustment. Re-
NO. 3.
pair valve or replace cam if nec-
essary.
Worn or damaged water valve -
Rebuild water valve.
TEST NO. 2.
Water in gear case Worn or damaged water valve low Rebuild water valve.
(milky or brown color in oil) pressure water seal and oil seal.
Oil leaking from below gear case Worn or damaged water valve oil Rebuild water valve.
shim area. seal.
Water in pump crankcase Worn or damaged water pump low Rebuild pump head and plunger
(milky or brown color in oil)
pressure seal or cracked ceramic sleeves.
plunger.
Engine dies when water system Low engine RPM.
Throttle must be in FAST posi-
is engaged.
tion. Adjust carburetor fast setting
to 3450 to 3550 RPM - no load.
Relief pressure too high - TEST
Replace relief valve. DO NOT at-
NO. 2.
tempt to adjust.
Low engine power.
Check for contaminated fuel,
plugged fuel filter or fuel line,
plugged air cleaner, bad spark
plug. (see Chapter 3 - Engine).
Jammed or siezed pump or gear-
Inspect components and repair
case.
as necessary.
Hydroject 3010 Page 6 - 11 Troubleshooting