Labrie Top Select, Maintenance Manual, Page: 91 / 145

Hydraulic System Maintenance
83
Figure 7 - 13 Optional Maximizer
Inspecting the Pump
If the pump is adequately maintained and works smoothly, it will provide a satisfactory output.
However, if the pump whines, vibrates or rattles, apply the following inspection procedure.
To inspect the pump, proceed as follows:
1.
Ensure that the parking brake is applied and that the vehicle is tagged out for maintenance
purposes.
2.
Start the engine and engage the hydraulic pump.
N
OTE
: The pump should turn freely without any excessive noise or vibrations.
3.
Inspect the connections for any loose fittings.
4. Check underneath the pump for any oil leaks.
5.
If there is no electrical power, refer to the electrical schematics provided with the truck.
Adjusting Main Relief Valve Pressure
It is recommended to verify the pressure setting once every month to prevent damage to the
equipment and make sure it operates as efficiently as possible. If the pressure is not at the
recommended setting, the main relief valve needs to be readjusted. Refer to the pressure adjustment
table (see Pressure and RPM Table on page 85) for proper settings.
Most of the hydraulic valve sections operate at 2000 psi except for the Maximizer section, if equipped.
For details, refer to the hydraulic system schematics.