Troubleshooting 183
Pump
The pump is operated by a control switch located on the control panel (see Figure 2
15). When it is
engaged, the switch turns green.
Three conditions must be met for the pump to engage and the switch to turn green:
Air pressure must be at approximately 70 psi
Engine speed must be lower than 900 rpm
Emergency S
TOP
button (red) must be pulled out
Air pressure condition is verified by a pressure switch and engine speed, by the transmission control
module (TCM).
If the pump does not engage when the pump switch is turned on, it may be related to a voltage supply
problem in the pump circuitry. Contact your LabriePlus service technician for instructions on how to
solve this problem.
N
OTE
:
Neither the engine throttle nor the transmission not being in Neutral will affect pump
operation once the pump is engaged.
Pump Cavitation
Cavitation is defined as the formation of air pockets in a moving fluid. Air in the hydraulic oil causes
excessive wear and noise. Make sure to prime the pump properly after replacement or after flushing
the hydraulic system (refer to “Priming a New Pump” on page 126). When the pump is properly
primed, cavitation disappears after a short period of time because air is returning to the hydraulic
tank.
If the pump is still generating unusual noise after performing the pump priming procedure, then you
will have to bleed the hydraulic system.
To do so:
1.
Apply all safety measures to ensure safety around the vehicle at all times.
2.
Connect a 0–4000 psi pressure gauge to the main valve (see Figure 8
4) to ensure that no
pressure has built up in the system.
3.
Apply the parking brake and start the engine.
4.
Engage the hydraulic pump (pump/
PTO
switch “ON”).
5.
Place a pan or a bucket under the plug located on the output section of the main control valve
5) and slowly loosen the plug.
A mixture of oil and air will come out. Keep bleeding the oil until the pump noise stops.
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Страница 36: ...28 Safety ...
Страница 112: ...104 Lubrication ...
Страница 136: ...128 Hydraulic System Figure 5 18 Filler cap Figure 5 19 Oil temp level gauge Figure 5 20 Steel hydraulic tank ...
Страница 139: ...Hydraulic System 131 Figure 5 23 Strainer assembly Strainer ...
Страница 144: ...136 Hydraulic System Figure 5 27 Detecting cylinder internal leaks 1 2 3 4 5 A A A ...
Страница 159: ...Hydraulic System 151 Main Hydraulic Schematics 0 1 2345 62789 ELECTRO HYDRAULIC VALVE STD RH ARM ...
Страница 160: ...152 Hydraulic System 0 1 2345 62789 ELECTRO HYDRAULIC VALVE HD RH ARM ...
Страница 161: ...Hydraulic System 153 0 1 2345 62789 ELECTRO HYDRAULIC VALVE CRUSHER PANEL HD RH ARM ...
Страница 162: ...154 Hydraulic System 0 1 2345 62789 ELECTRO HYDRAULIC VALVE HD 300 GAL RH ARM DUAL PRESSURE GRIPPER ...
Страница 163: ...Hydraulic System 155 0 1 2 3456 7389 0 ELECTRO HYDRAULIC VALVE CRUSHER PANEL HD 300 GAL RH ARM ...
Страница 164: ...156 Hydraulic System ...
Страница 176: ...168 Electric System Cab Console Control Wiring ...
Страница 177: ...Electric System 169 Control Box ...
Страница 178: ...170 Electric System Chassis ...
Страница 179: ...Electric System 171 Tailgate Lighting ...
Страница 180: ...172 Electric System Left Body SideWiring ...
Страница 181: ...Electric System 173 Right Body Side Wiring ...
Страница 182: ...174 Electric System Camera s Switchpack s Layout Option s AUTO 10 SEC INHIBIT AUTO ...
Страница 204: ...196 Troubleshooting ...
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Страница 206: ...198 Troubleshooting ...
Страница 230: ...222 Multiplexing ...
Страница 232: ...224 Lifting Arm Figure 10 1 Mounting bolts Figure 10 2 Rollers and bearings Figure 10 3 Bolt locks Bearing Roller ...
Страница 252: ...244 Lifting Arm Figure 10 24 Cadmium plated clamping screws Figure 10 25 Tightening screws in a continuous sequence ...
Страница 254: ...246 Lifting Arm Figure 10 27 Standard lifting arm ...
Страница 255: ...Lifting Arm 247 ...
Страница 256: ...248 Lifting Arm ...