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Condition Possible Cause Correction
Machine stops aerating (pump Machine not moving. Normal condition of interlock sys-
shuts down during aeration). tem. Operator must hold engage
button in to aerate with traction
bail in neutral.
Inadequate water supply.
Check for kinked water supply
hose, restriction in line or partially
open valve at water source.
Plugged inlet water filter.
Check water pressure at gauge
when pump is engaged. If pres-
sure drops to less than 15 PSI,
but was initially higher, replace
water filter.
Electrical problem.
See Troubleshooting in
Chapter 5 - Electrical System
Water system engages (pump
Air in system.
With engine OFF and water supp-
belt and gear case drive shaft
ly connected, open high pressure
rotate), but no aeration holes are
bleed valve and bleed air out of
produced or aeration hole depth
system.
is shallow or inconsistent.
Soil density or moisture content.
If hole depth was satisfactory
before in another area, different
nozzle configuration may be re-
quired.
Plugged nozzles, worn nozzles or
Stop engine, open high pressure
improper nozzle configuration.
bleed valve, then inspect noz-
NOTE: Check operation of nozzles
zles. Check for plugged nozzles.
by aerating over a piece of
Verify size and quantity (see Noz-
cardboard, then inspecting
zle Size and Approximate Depth
cardboard.
Chart). Nozzles that are too large
will cause loss in pressure and
could cause damage to the ac-
cumulator and other water sys-
tem components.
Gear or cam damage in gear case.
Inspect gear case for gear or
cam damage and repair as neces-
sary.
Leak in high pressure water sys-
Check for leaks with water sys-
tem.
tem engaged. Stop engine, open
high pressure bleed valve and
repair leaks as necessary.
NOTE: Excessive water exiting
between pump head and
crankcase indicates pump wear
or damage. Excessive water exit-
ing from shim area below gear-
case indicates valve wear or
damage. Do water system tests
and make repairs as necessary.
Troubleshooting Page 6 - 10 HydroJect
™
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