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Servicing a New Holland TN-Series
Pictures are of a TN70. Concepts apply to other models.

Before performing any of the following operations, be sure that engine is stopped and has been given adequate time to cool down


Fan Belt

  1. Check fan belt deflection to .39 - .43 inches (10 – 11mm) with a load of 17.7 – 22.1 pounds (8 – 10 kg)

  2. To adjust tension, loosen the screw, adjust tension, and tighten screw

Replace the belt if it is damaged or requires adjustment frequently


Air Filter

When the air filter indicator light illuminates, check the filter for clogging

  1. Remove ail cleaner cover

  2. Take primary filter out of canister

  3. Clean with air pressure from the inside to the outside at a pressure less than 84 psi

or

Clean with water and a non-foaming detergent, rinse with water at less than 41 psi, and dry with air at less than 122°F

  1. Clean inside of container with a damp cloth

  2. Reinstall air filter cartridge

Outer filter needs to be replaced every year, or when cracks appear (check by putting a light inside the filter and examining the outside)

Inner filter should be replaced at the same time that the outer filter is replaced





Fuel Filter Condensation Discharge

Discharge fuel filter condensation by loosening the screw ¾ of a turn


Oil Sump

  1. Remove drain plug to drain oil

  2. Put drain plug back in

  3. Fill oil as needed

Oil sump should be drained after every 300 hours of operation

 

Changing Fuel Filter

  1. Unscrew fuel filter cartridge

  2. Replace with new cartridge

  3. Bleed fuel system

Oil filter should be replaced after every 300 hours of operation
 


Bleeding the Fuel System

System needs to be bled in the following situations:

  • If the tractor has not been used for a long period of time

  • When fuel filter or fuel lines have been removed

  • When fuel tank is empty

  1. Unscrew the bleed plug two turns

  2. Move lever until fuel without air bubbles flows from bleed hole

  3. Tighten bleed plug

  4. Loosen fuel lines at all 3 injectors

  5. Move lever again until fuel without air bubbles flows from bleed hole

  6. Tighten fuel lines

  7. Start engine and release key as soon as engine starts

If engine does not start, repeat above steps

If fuel system is being bled because tractor has not been run for a long period of time, be sure to add a protective fuel additive into the fuel at 10% of the amount of fuel. Then run engine for about half an hour.

 

Transmission and Services Oil Filter

  1. Unscrew old oil filter and discard

  2. Apply a small amount of oil to the rubber seal of the new filter

  3. Tighten filter until it touches the mounting surface

  4. Tighten filter an additional ¾ turn by hand

  5. When a new filter is installed, oil typically decreases a little. Ensure that oil does not leak through the seal of the filter, then refill oil as needed.

Transmission and services oil filter should be replaced after every 300 hours of operation


Power Shuttle Oil Filter

  1. Unscrew old oil filter and discard

  2. Apply a small amount of oil to the rubber seal of the new filter

  3. Tighten filter until it touches the mounting surface

  4. Tighten filter an additional ¾ turn by hand

  5. When a new filter is installed, oil typically decreases a little. Ensure that oil does not leak through the seal of the filter, then refill oil as needed.

Power shuttle oil filter should be replaced after every 300 hours of operation

 

Engine Oil Filter

  1. Unscrew old oil filter and discard

  2. Apply a small amount of oil to the rubber seal of the new filter

  3. Tighten filter until it touches the mounting surface

  4. Tighten filter an additional ¾ turn by hand

  5. When a new filter is installed, oil typically decreases a little. Ensure that oil does not leak through the seal of the filter, then refill oil as needed.

Engine oil filter should be replaced after every 300 hours of operation




Draining the Fuel Tank

  1. Park tractor on a level surface

  2. Make sure that engine is turned off

  3. Remove drain plug to drain fuel

  4. Reinstall drain plug

  5. Refill fuel tank

  6. Bleed fuel system

Drain fuel tank after every 1200 hours of work, or every year, whichever comes first

 

Changing 4WD Front Axle Housing Oil

  1. Unscrew drain plug to drain oil

  2. Reinstall drain plug

  3. Fill with new oil through the filler plug until oil level reaches the bottom of the filler plug hole

Change oil after every 1200 hours of work, or every two years, whichever comes first


Changing 4WD Front Axle Final Drives Oil

  1. Rotate wheel until drainage plug is at the lowest possible point

  2. Remove plug to drain oil

  3. Fill with new oil (through the same hole that oil drained through) until oil level reaches the bottom of the hole

Change oil after every 1200 hours of work, or every two years, whichever comes first


Changing Transmission And Lift Oil

  1. Remove drain plugs (4) and drain oil

  2. Reinstall drain plugs

  3. Refill oil through dipstick hole

Change oil after every 1200 hours of work, or every two years, whichever comes first