New Holland T7030 Service Manual page 57

DISTRIBUTION SYSTEMS - PRIMARY HYDRAULIC POWER SYSTEM
1 EndPlate
3 Coupling
5 Rotor Housing
7 Seal
9 Hub
11 System Relief Valve ( 245 Bar)
13 Seal
15 Main Charge Filter
17 Key
Low Charge Pressure Switch
The low charge pressure switch will cause a light to 'Flash' on the instrument cluster whenever the charge pressure
is less than 0.75 bar ( 11 lbf/in2)
Charge Pressure Filter Dump Valve
The charge pressure filter dump valve is a safety relief valve for relieving excess pressure on the charge pump should
the filter be restricted. This valve will start to operate if the charge pressure exceeds 6 bar ( 87 lbf/in2).
Charge Pressure Valve
The charge pressure valve diverts excess oil supplied by the charge pump and not required by the variable flow piston
pump to the inlet port of the steering and lubrication circuit pump.
This valve starts to operate at a pressure of 1 bar ( 14.5 lbf/in2) and when fully open limits the charge pressure circuit
oil to 3 bar ( 44 lbf/in2) .
2
BSE3587A
Charge Pump Components
2 Seal
4 Shaft
6 Charge Pump Housing
8 Pin
10 Screw Plug
12 Check Valve Plug
14 Charge Pressure Filter Dump Valve Spool
16 Pump Rotor
18 Screws
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