The New Holland 7840 tractor cooling system capacity is 5.3 gal | 20 L, coolant type is extended-life OAT coolant meeting MAT 3724, and coolant change interval is every 1,500 hours or 3 years.
New Holland 7840 Coolant Capacity Details
Cooling system capacity
5.3 gal | 20 L
Coolant type
Extended-life OAT coolant meeting MAT 3724
Coolant change interval
Every 1,500 hours or 3 years
Coolant mixture ratio
50/50 antifreeze and water
Radiator cap pressure
7 psi | 48 kPa
Coolant Capacity Comparison Chart
Coolant Capacity Comparison
This model
5.3 gal
Average
5.5 gal
Low
3 gal
High
9 gal
Benchmarks use practical low, average and high coolant-capacity ranges for the utility tractor category. Use the exact tractor manual before buying coolant.
New Holland 7840 Extra Coolant Notes
Engine horsepower
90 hp | 67.1 kW
Engine displacement
6.6 L | 402 cu in
Capacity note
For the New Holland 7840, the listed cooling system capacity is 5.3 gal | 20 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 7840 is 7 psi | 48 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 7840 Coolant FAQs
How much coolant does a New Holland 7840 take?
The New Holland 7840 takes 5.3 gal | 20 L of coolant. That is about normal for the utility tractor benchmark shown here, so plan it like a standard drain-and-refill rather than a tiny top-up.
Is the New Holland 7840 coolant capacity normal?
Yes, 5.3 gal | 20 L lands about where you would expect for this tractor category. The main thing is buying enough for a complete refill plus a small top-off amount.
How many coolant jugs do I need for a New Holland 7840?
This is more than a small top-off job. A 5.3 gal | 20 L system needs about 6 one-gallon containers if you are using premixed coolant. If using concentrate at a 50/50 mix, plan on about 2.6 gal of concentrate and 2.6 gal of distilled water. In metric terms, that is roughly 4 x 5 L containers for a full premix refill.
Can I mix coolant types in a New Holland 7840?
Because the listed coolant is extended-life OAT coolant meeting MAT 3724, the clean move is to stay with the same approved chemistry. Do not casually mix it with old green conventional coolant; if the old coolant type is unknown, flush first or confirm what is already in the system. 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 7840 need?
With the listed 50/50 antifreeze and water mix, a full 5.3 gal | 20 L refill works out to about 2.6 gal of antifreeze concentrate and 2.6 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 7840?
The listed cap pressure is 7 psi | 48 kPa. That is a lower-pressure cap, so do not upgrade it to a higher-pressure cap just because it sounds stronger. Too much cap pressure can stress hoses, radiator seams and older seals.
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.
