The Case IH D45 tractor cooling system capacity is 13 gal | 49.2 L, coolant type is extended-life OAT coolant, and coolant change interval is every 1,500 hours or 5 years.
Case IH D45 Coolant Capacity Details
Cooling system capacity
13 gal | 49.2 L
Coolant type
Extended-life OAT coolant
Coolant change interval
Every 1,500 hours or 5 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
13 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.
Case IH D45 Extra Coolant Notes
Engine horsepower
45 hp | 33.6 kW
Engine displacement
2.2 L | 134 cu in
Capacity note
For the Case IH D45, the listed cooling system capacity is 13 gal | 49.2 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 Case IH D45 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.
Case IH D45 Coolant FAQs
How much coolant does a Case IH D45 take?
The Case IH D45 takes 13 gal | 49.2 L of coolant. That is well above the normal utility tractor benchmark shown here, so treat it as a full cooling-system service job, not a quick top-up.
Is 13 gal | 49.2 L a lot of coolant for a Case IH D45?
Yes. For this tractor category, 13 gal | 49.2 L is well above normal. This is the sort of refill where you want all coolant on hand before draining, because stopping halfway through the job is annoying and messy.
How many coolant jugs do I need for a Case IH D45?
Do not underestimate this refill. A 13 gal | 49.2 L system needs about 13 one-gallon containers if you are using premixed coolant. If using concentrate at a 50/50 mix, plan on about 6.5 gal of concentrate and 6.5 gal of distilled water. In metric terms, that is roughly 10 x 5 L containers for a full premix refill.
Can I mix coolant types in a Case IH D45?
Because the listed coolant is extended-life OAT coolant, 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 Case IH D45 need?
With the listed 50/50 antifreeze and water mix, a full 13 gal | 49.2 L refill works out to about 6.5 gal of antifreeze concentrate and 6.5 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 Case IH D45?
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 caseih.com website before draining, flushing or refilling the cooling system.
