Labrie MINIMAX Maintenance Manual page 129

Problem
Cavitation, excessive noise
or vibration of the pump.
The pump does not engage Red emergency S
No hydraulic pressure
Possible causes
Not the proper grade of oil
Ball valve on suction line not
fully open
Low oil level
Oil too thick
Air in the system
Particle contamination or dirty
strainer
Blocked suction hose
button is
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engaged
Engine speed higher than
900 rpm
Electrical failure
Pump not engaged
Troubleshooting 121
Solution
Empty oil and refill with anti-
foaming oil. See Recommended
Lubricants on page 57 and Emptying
the Hydraulic Tank on page 90.
Fully open the ball valve. See Prior to
Start Up on page 19.
Add oil to the required level. See
Inspecting Hydraulic Cylinders on
page 96.
See Recommended Lubricants on
page 57 for proper type of oil to use.
See also Emptying the Hydraulic
Tank on page 90.
See Pump Cavitation on page 124.
Check all hose and pipe connections
and tighten them if necessary.
Clean the strainer and change the
return filter. Fill with clean oil. See
Cleaning the Strainer on page 92,
Replacing Filter Elements on page 95,
and Inspecting Hydraulic Cylinders
on page 96.
Take an oil sample for further
analysis (see Testing Hydraulic Oil
on page 58).
Unblock or replace hose.
Ensure that the red emergency S
button on packer control station is
pulled out.
Reduce engine speed below
900 rpm. If the speed cannot be
reduced under 900 rpm, contact
your local chassis dealer.
Check fuses inside the control panel
and the main fuses inside battery
box. See Adjusting and Repairing
Electrical Components on page 103.
Turn on the pump switch.
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