New Holland Tractor TJ275 TJ325 TJ375 TJ425 TJ450 TJ500 Repair Manual 87542227 – PDF DOWNLOAD

Description

New Holland Tractor TJ275 TJ325 TJ375 TJ425 TJ450 TJ500 Repair Manual

FILE DETAILS:

New Holland Tractor TJ275 TJ325 TJ375 TJ425 TJ450 TJ500 Repair Manual

Size: 1.24 GB
Format: PDF
Language: English
Number of Pages: 6553 pages
Brand: New Holland
Type of machine: Tractor
Type of document: Repair Manual
Model: TJ275, TJ325, TJ375, TJ425, TJ450, TJ500
Part No: 87542227

DESCRIPTION:

New Holland Tractor TJ275 TJ325 TJ375 TJ425 TJ450 TJ500 Repair Manual

SAMPLE PAGE FROM THE MANUAL :

• The PFC piston pump supplies the steering system, remote auxiliary valves and the TPH hitch control valve and each contains a signal port. Each signal port directs a signal pressure, which is equal to the working pressure in that particular circuit along signal lines through check valves to the pump compensator spool. The compensator will place the pump swash plate at the correct angle to meet system demands. A single check valve is located in each signal line of the auxiliary valves to the compensator spool.
• If several auxiliary valves are operated at the same time, the signal line at the higher pressure will cause the check valve(s) to seat against the signal at the lower pressure. This prevents signal bleed off through other auxiliary valve sections and insures that the highest signal line pressure will act on the compensator spool.
• MEGAFLOW The PFC piston pump supplies the two Megaflow remote auxiliary valves and the Megaflow power beyond port. Each of the two auxiliary valves has a signal port. Each signal port directs a signal pressure, equal to the working pressure of that valve section, through a check valve to the pump compensator spool. The compensator will move the pump swash plate to the correct angle to meet the work load demands. A single check valve is located on each auxiliary valve signal line.
• If both auxiliary valves are operated at the same time, the signal with the highest pressure will cause check valve to close the signal port with lower pressure. This prevents signal bleed off to the other auxiliary valve and insure that the highest signal line pressure acts on the compensator spool. Engine Start Up Before the engine is started, the pump swash plate angle will be at the maximum.
• As soon as the engine is cranked by the starter the PFC axial piston pump will produce flow and pressure will build in the pump delivery passage. As soon as this pressure reaches 400 to 450 psi (28 to 31bar) the pump will be put into its low pressure standby mode. This occurs almost instantly and makes engine starting much easier. Operating Modes The pump is designed to operate in three different modes according to the demand for flow and pressure placed upon it.
• These modes are as follows: Low Pressure Standby When there is no demand for flow, there is no pressure signal feedback to the pump and the pump will go to the low pressure standby mode. As there is no place for the oil from the pump to flow, the pump will build pressure in the pump outlet passage. This pressure is directed through internal passages in the piston pump back plate to the end of the pump compensator spool opposite the spring and to the swash plate counter piston.
• The spring acting on the flow compensator spool, is set to maintain 400 to 450 psi (28 to 31 bar) at the pump outlet. The flow compensator spool will then move up to allow the oil to flow into the passage leading to the pump control piston.
• The pressure acting on the pump control piston tilts the pump swash plate against the swash plate control spring and counter piston, to a near neutral position. In this condition, the pump will provide just enough flow to make up for internal leakage, thus maintaining a minimum system pressure of 400 to 450 psi (28 to 31bar).
• The pump will remain in the low pressure standby position as long as there is no pressure or flow demand from the hydraulic system. In this mode, the pump produces very little heat and absorbs very little horsepower from the engine. This is one of the outstanding features of the PFC axial piston pump.

NEW HOLLAND TRACTOR TJ275 TJ325 TJ375 TJ425 TJ450 TJ500 REPAIR MANUAL 87542227 – PDF DOWNLOAD:

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TABLE OF CONTENTS:

New Holland Tractor TJ275 TJ325 TJ375 TJ425 TJ450 TJ500 Repair Manual

SECTION 00 – GENERAL INFORMATION 2
SECTION 10 – ENGINES 5
SECTION 21 – TRANSMISSIONS 93
SECTION 31 – POWER TAKE-OFF 101
SECTION 33 – BRAKES AND CONTROLS 105
SECTION 35 – HYDRAULIC SYSTEMS 107
SECTION 37 – TOWING HOOKS AND BALLASTING 122
SECTION 39 – FRAMES 123
SECTION 41 – STEERING 124
SECTION 44 – AXLES AND WHEELS 128
SECTION 50 – CAB CLIMATE CONTROL 136
SECTION 55 – ELECTRICAL SYSTEMS 146
SECTION 90 – PLATFORM AND CAB

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⦁ This is the same manual used by the dealers to diagnose and troubleshoot your vehicle
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