Air Conditioning Refrigerant R134a

For the air conditioning system refrigerant charge amount, see the refrigerant caution label located under the hood. See your dealer/retailer for more information.

Cooling System - Automatic Transmission

• Isuzu 6H (207-275 hp)

34.8 qt

32.9 L

• Isuzu 6H (300 hp)

33.9 qt

32.1 L

Cooling System - Manual Transmission

• Isuzu 6H (207-275 hp)

32.7 qt

31.0 L

• Isuzu 6H (207-275 hp) with A/C and Increased Cooling

35.9 qt

34.0 L

• Isuzu 6H (300 hp)

36.0 qt

34.1 L

• Isuzu 6H (300 hp) with A/C and Increased Cooling

36.0 qt

34.1 L

Engine Oil with Filter

23.8 qt

22.5 L

Check fill level on the oil indicator after initial fill to make sure it is actually full. Oil level may vary depending on vehicle option content.

Additional oil is required with auxiliary oil filter systems. Make sure to add enough extra oil to fill the auxiliary oil filter system. For vehicles equipped with the LUBERFINER 750-C, add 14 quarts (13.25 L).

Fuel Capacity

• Optional

35 gal

132.5 L

• Standard

50 gal

189.2 L

• Optional

50 gal

189.2 L

Optional¹ (Dual Tanks)

70 gal

264.8 L

Optional² (Dual Tanks)

75 gal

283.8 L

• Optional³ (Dual Tanks)

100 gal

378.5 L

¹Two 35-gallon (132.4 L) tanks

²One 25-gallon (94.6 L) tank and one 50-gallon (189.2 L) tank

³Two 50-gallon (189.2 L) tanks

Rear Axle - Single Speed

• 80 (GL4)

8.0 pt

3.7 L

• 19060D (HPM), 19060S (HPK), 21060D (HPN), 21060S (HPP), 22060S (HPG)

31.0 pints

14.7 L

• 23090S (HPT)

42.5 pints

20.1 L

• 23105D (HNB), 23105S (HNA)

51.0 pints

24.1 L

• 26105S (HPA)

51.0 pt

24.1 L

• S110 (HD2) and S130 (HD1)

15.0 pt

7.1 L

Rear Axle - Tandem

• DS344(front) (HPI)

34.0 pt

16.1 L

• DS344 (rear) (HPI)

31.0 pt

14.7 L

• DS404(HPE), DS404P (HPJ) (front/rear unit)

32.0 pt

15.1 L

• RSH44 (front/rear unit) (HP3)

29.0 pints

13.7 L

Rear Axle - Two-Speed

• 19060T (HPM), 21060T (H15)

38.0 pints

14.7 L

• 21060T (H15)

38.0 pt

18.0 L

• 23082T (H25)

44.0 pints

20.8 L

• 26080T (GJ4)

44.0 pints

20.8 L

Transmission Fluid, Automatic

• 3000 RDS and EVS, and 3500 RDS and EVS

52.0 pints

24.6 L

Add 2 pints (1 L) when changing spin-on or remote filter.

See the Allison Automatic Transmission Operator's Manual for fluid check and maintenance information.

Transmission Fluid, Manual

• FS5406A, FS6406

19.5 pints

9.2 L

• RT8709

26.0 pints

12.3 L

• RT8908LL

28.0 pints

13.2 L

All capacities are approximate. When adding, be sure to fill to the approximate level, as recommended in this manual. Recheck the fluid level after filling.

Isuzu 6H

LF8

Common Rail Fuel System