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Valtra VALMET 6800 User Manual

Valtra VALMET 6800
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VALTRA – VALMET
MEGA MEZZO HI-TEC
WORKSHOP MANUAL
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Valtra VALMET 6800 Specifications

General IconGeneral
Engine TypeDiesel
Engine Cylinders6
PTO Speed540/1000 rpm
Hydraulic SystemOpen center
Max. Speed40 km/h
Rated Engine Power74 kW
Hydraulic Flow73 lpm

Summary

22. Fuel system

ValtraValmet-tractors, Stanadyne injectors

Details on Stanadyne injectors for ValtraValmet tractors, listing types and specifications.

Bleeding fuel system

Step-by-step guide to removing air from the fuel system for proper operation.

Bleeding thermostart system

Procedure for bleeding air from the thermostart system to ensure starting capability.

Measuring fuel feed pressure

Method for measuring fuel feed pressure to diagnose system performance issues.

Checking overflow valve

Procedure to check the opening pressure of the overflow valve for correct fuel system operation.

Changing fuel feed pump valves

Steps to disassemble, clean, and replace valves within the fuel feed pump.

Checking injection timing

Method to verify the precise timing of fuel injection for optimal engine performance.

Adjusting fuel injection timing

Procedure for correcting the engine's fuel injection timing for optimal performance.

Removing fuel injection pump

Detailed steps for safely removing the fuel injection pump from the engine.

Fitting fuel injection pump

Instructions for correctly installing the fuel injection pump onto the engine.

Checking/changing delivery valve

Procedure for inspecting and replacing the delivery valve in the fuel injection system.

Adjusting low idling speed

Steps to set the correct idling speed for stable engine operation.

Removing injectors

Method for safely disconnecting and removing fuel injectors from the cylinder head.

Inspecting injectors

Guidelines for testing injectors, checking opening pressure, and spray pattern.

Tightness of nozzle

Procedure to test the nozzle for leaks at specific pressures.

Reconditioning injectors

Steps for disassembling, cleaning, and reassembling fuel injectors.

Fitting injector in engine

Instructions for correctly installing injectors into the engine cylinder head.

Fitting delivery pipes

Guidance on installing fuel delivery pipes without tension or damage.

Adjusting injection timing on 6800, 8750 and 8950 tractors

Detailed procedure for setting injection timing on specific tractor models.

Manifold pressure compensator on 6800 tractor (Bosch LDA)

Explanation of the manifold pressure compensator's role in boost control.

Cold start solenoid

Description of the cold start solenoid's operation during engine ignition.

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