Maintenance 113
Pressure Relief Valves
Pressure relief valves for the residential Front Loaders include a top pressure relief valve, a main
pressure relief valve, two cart tipper port pressure relief valves and an arms down port pressure relief
valve.
Figure 3-59
Pressure relief valves
The inlet section pressure relief valve protects the cart tipper circuit and is set 50-100 psi higher
than the main pressure relief valve.
The main pressure relief valve is located in the mid-inlet section and protects the remaining
downstream work circuits. It is set to 2250 psi.
The two cart tipper port pressure relief valves protect the lines leading to the cart tipper and are set
to 1500 psi.
The arms down port pressure relief valve reduces downward pressure allowed against the arm
cradle assembly and is set to 1000 psi.
Hydraulic Hose
Labrie Enviroquip Group uses only premium quality hydraulic hoses designed specifically for use in
our hydraulic systems. All pressure hoses have a maximum working pressure of at least 3,000 psi, with
a x4 burst pressure rating. The hydraulic hose type is identified on the hose covers, in the ‘lay line’
(see Figure 3-60). When replacing any hydraulic hose, it is extremely important that the replacement
hose carries the same SAE rating as the original hose.
Figure 3-60
Hose “lay line”
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