Servicing New Holland TC-Series Tractors Pictures are of a TC31. Concepts apply to all TC-Series machines. TC18 / TC21 / TC23 / TC24 / TC26 / TC29 / TC30 / TC31 / TC33/ TC34 / TC35 / TC40 / TC45
Changing the Engine Oil and Filter
While engine is still somewhat warm take out drain plug and drain oil
Put plug back in
Remove old oil filter (be careful as oil will drain from filter)
Apply a small amount of engine oil to the rubber seal of the new filter
Tighten filter until it touches the mounting surface
Tighten filter an additional ¾ turn by hand
When a new filter is installed, engine oil typically decreases a little. Ensure that oil does not leak through the seal of the filter, then refill oil as needed.
Change oil and filter after first 50 hours and every 100 subsequent hours under normal conditions. If operating under sever conditions change every 70 hours after the first change
.
Draining the Fuel Filter
Ensure that there is fuel in the tank
Close fuel shutoff valve (so that the handle is pointing towards the “C”)
Take fuel sediment bowl off
Open fuel shutoff valve and allow it to flow until only fuel is flowing from the filter base, no water
Close shutoff valve
Reattach fuel sediment bowl
Open fuel shutoff valve
Bleed fuel system
Drain fuel filter after every 100 hours of use
Changing the Fuel Filter
Close fuel shutoff valve (so that the handle is pointing towards the “C”)
Take fuel sediment bowl off by rotating the retaining nut
Open fuel shutoff valve and allow it to flow until only fuel is flowing from the filter base, no water
Install new fuel element
Check the two O rings for any damage and replace them as needed
Install the spring between the bottom of the fuel filter and the sediment bowl
Reattach the sediment bowl
Open fuel shutoff valve (so that the handle is pointing towards the “O”)
Bleed fuel system
Replace fuel filter after the first 50 hours of use, and then after every 200 subsequent hours
Changing the Air Cleaner Elements
Outer Element
Remove air cleaner cover by pushing down on it and rotating it counterclockwise
Pull outer element out of assembly
Clean loose dirt from element
Check the end of the canister for dirt
Blow compressed air (under 30psi) from the inside of the filter to clean it
Check inner diameter seals for damage (if damaged, replace element)
Put a light inside the element to check for paper leaks or for the bonding of the paper to the end plate (if leaks are found, replace element)
Push primary element back into canister and reinstall
Put air cleaner cover into place
Clean outer element after every 100 hours of service
Inner Element
Remove air cleaner cover and outer element to expose the inner element
Inspect the inner element by placing a light inside the element. If little or no light shines through the element it is partially clogged.
Clean dirt from element and canister
Check seals for damage (if damaged, replace element)
Push element back into canister
Push outer element over the top of the inner element and clamp air cleaner cover into place
Change inner element after every 1000 hours or every third outer element change, whichever comes first
Hydraulic Filter
Remove old filter
Apply a small amount of oil to the rubber seal of the new filter
Tighten filter until it touches the mounting surface
Tighten filter an additional ¾ turn by hand
Run engine and check filter for leaks
Stop engine
Check hydraulic oil level and refill as needed
Replace hydraulic filter after first 50 hours and then after every 300 subsequent hours
Changing the Transmission, Rear Axle, and Hydraulic System Oil
Oil drains best when engine is at operating temperature, but not hot
Remove transmission and rear axle drain plugs
Drain oil and reinstall plugs
Take out filler plug and fill with NH 134 hydraulic oil to correct level on dipstcik
Put dipstick and filler plug back in
Bleeding the Fuel System
Fuel system needs to be bled for the following reasons:
System has been drained
Filter has been replaced
Tractor has run out of fuel
Fuel lines have been disconnected
Injection pump has been replaced
To bleed fuel system:
Ensure that there is fuel in the tank
Open shutoff valve (so that the handle is pointing towards the “O”)
Open the bleed screw on the fuel pump
Close bleed screw when air-free fuel begins to flow
Put throttle in the highest speed position
Turn engine over for a few seconds
Bleeding the Injector Lines
Injector lines need to be bled for the following reasons:
Tractor has run out of fuel
Injectors have been replaced
Injection pump has been removed
To bleed injector lines:
Loosen injector line fittings at the injectors
Push hand throttle to highest speed position
Crank engine until air-free fuel flows from each connection (do not crank engine continuously for more than 30 seconds)
Tighten fittings to 18-22 ft-lbs (24-29Nm) of torque
If air remains in the system, repeat the above steps
Changing Clutch Housing Oil
Detach clutch assembly
Remove check plug
Drain oil from check plug opening
Fill with NH 134 hydraulic oil through the check plug hole
Oil is full when oil level is at the bottom of the opening for the check plug
Reinstall check plug and clutch assembly
Oil should be checked after every 50 hours and changed after every 600 hours
Changing the Power Steering Oil
Oil drains best when engine is at operating temperature, but not hot
Take out drain plug to drain oil
Put drain plug back in
Turn the filter / reservoir assembly counterclockwise to detach it
Apply a small amount of oil to the rubber seal of the new filter
Tighten filter until it touches the mounting surface
Tighten filter an additional ¾ turn by hand
Remove filler plug / dipstick and fill the reservoir with NH 134 hydraulic oil
Put filler plug / dipstick back in
Power steering oil needs to be changed after every 600 hours of use
Wheel Bolt Torque
Check wheel bolts regularly as follows:
Front wheel torque 90 ft pounds
Rear wheel torque 125 ft pounds
Lubrication Fittings
Grease the following points after every 50 hours (or more if operating under extremely dirty conditions)