The New Holland TZ18DA tractor cooling system capacity is 1.1 gal | 4 L, coolant type is ethylene glycol-based coolant, and coolant change interval is every 1,500 hours or 2 years.
New Holland TZ18DA Coolant Capacity Details
Cooling system capacity
1.1 gal | 4 L
Coolant type
Ethylene glycol-based coolant
Coolant change interval
Every 1,500 hours or 2 years
Coolant mixture ratio
50/50 antifreeze and water
Radiator cap pressure
13 psi | 90 kPa
Coolant Capacity Comparison Chart
Coolant Capacity Comparison
This model
1.1 gal
Average
2.8 gal
Low
1.5 gal
High
5 gal
Benchmarks use practical low, average and high coolant-capacity ranges for the compact tractor category. Use the exact tractor manual before buying coolant.
New Holland TZ18DA Extra Coolant Notes
Engine horsepower
18 hp | 13.4 kW
Engine displacement
1 L | 58.2 cu in
Capacity note
For the New Holland TZ18DA, the listed cooling system capacity is 1.1 gal | 4 L. Buy slightly more coolant than the exact capacity so you have enough for topping off after air burps out.
Mixture note
50/50 antifreeze and water.
Radiator cap note
The radiator cap pressure listed for the New Holland TZ18DA is 13 psi | 90 kPa. Do not replace it with a random cap unless the pressure rating matches.
Refill note
Refill slowly, run the tractor until warm with the heater circuit open if fitted, let it cool, then recheck the coolant level. Never remove a hot radiator cap under pressure.
New Holland TZ18DA Coolant FAQs
How much coolant does a New Holland TZ18DA take?
The New Holland TZ18DA takes 1.1 gal | 4 L of coolant. That is on the low side for the compact tractor benchmark, which makes the refill cheaper, but the level still needs to be checked after the first heat cycle.
Is 1.1 gal | 4 L a small coolant capacity for a New Holland TZ18DA?
It is low compared with the benchmark on this page. That makes the job cheaper, but it does not make coolant choice or bleeding less important.
How many coolant jugs do I need for a New Holland TZ18DA?
This is a manageable refill amount. A 1.1 gal | 4 L system needs about 2 one-gallon containers if you are using premixed coolant. If using concentrate at a 50/50 mix, plan on about 0.5 gal of concentrate and 0.5 gal of distilled water. In metric terms, that is roughly 1 x 5 L containers for a full premix refill.
What coolant should I use in a New Holland TZ18DA?
The listed coolant is ethylene glycol-based coolant. Ethylene glycol tells you the base coolant, but the additive package still matters on diesel engines, so match the manual or an approved equivalent. The listed mix is 50/50 antifreeze and water, so do not run straight water except as a short emergency move.
How much concentrate and water does a New Holland TZ18DA need?
With the listed 50/50 antifreeze and water mix, a full 1.1 gal | 4 L refill works out to about 0.5 gal of antifreeze concentrate and 0.5 gal of distilled water. If using premix, do not add extra water unless the product label says to.
Can I use a different radiator cap on a New Holland TZ18DA?
The listed cap pressure is 13 psi | 90 kPa. That higher-pressure cap helps raise the boiling point, but only if the radiator neck, hoses and overflow path are in good shape. A weak cap or damaged seat can still cause coolant loss.
Official information note
Mistakes do happen. Coolant specs can change by year, engine, market, radiator option and coolant chemistry. Check the operator manual, parts book and official newholland.com website before draining, flushing or refilling the cooling system.
