NEWHOLLAND T7030.40.50.60 Repair Mannual

DISTRIBUTION SYSTEMS ­ PRIMARY HYDRAULIC POWER SYSTEM
PRIMARY HYDRAULIC POWER SYSTEM ­ Static description
Pressure test kit 297611 has been developed for pressure testing and contains adaptors specifically designed for
access to test ports.
Refer to PRIMARY HYDRAULIC POWER SYSTEM ­ Pressure test (A.10.A) which describes the procedure for performing
the following pressure tests using this kit and other standard fittings already available through CNH Logistics.
High Pressure System
High Pressure Standby
Sensing Line Pressure
Low Pressure Standby
Pump Charge Pressure
Steering
Lift Ram Pressure
Low Pressure System
Lubrication
Brake Boost Valve
Trailer Brake Valve
Before commencing hydraulic pressure testing perform the fault finding checks in PRIMARY HYDRAULIC POWER
SYSTEM ­ Troubleshooting (A.10.A) followed by the fault finding procedure for the type of concern identified. Following
these checks may identify an obvious cause for the concern and prevent unnecessary component disassembly.
The hydraulic pump is the heart of the hydraulic system and the chapter describes in detail the tests necessary to
confirm that pump output is to specification. Once specified pump output has been confirmed attention can be focused
on the appropriate pressure testing of individual components in the hydraulic circuit.
2 3/5/2007
A.10.A / 22