4-1 LUBRICATION INSTRUCTIONS
4-1.1 Special Instructions
For engine oil specifications refer to Engine Oil Specifications in this section. Recommended engine oil filter
service intervals will be located in Maintenance Section of this manual (Maintenance Charts).
Diesel engines: When air restriction reading (in inches of water vacuum) reaches 25 in. H20 or 635 mm Hg, clean
or replace engine air cleaner. Refer to Engine Section of this manual. Only new air cleaner elements should be
used to replace elements that have become restricted beyond the maximum recommended restriction level.
These elements are not to be cleaned. Replacement of elements is not to be judged on appearance.
Axles. SP type lubricant or API GL-5 quality meeting MIL-L-2105B or C or better specifications including synthetic
lubricants. For abnormally high temperature severe service (hot climate off-highway operation where vehicle is in
low speed heavy hauling for prolonged periods), use SAE 140.
-15° to 1000F (-26° to 380C)
-150F (-260C) and above
10°C to 1000F (-12° to 380C)
100F (-12°C) and above
400F (+40C) and above
SAE lOW engine oil for temperatures 0°F (-180C) and up. For temperatures below 0°F (-180C) use three parts
SAE 10W engine oil to one part kerosene. The mixture can safely be used in temperatures up to 320F (OOC). If severe
or dusty conditions: change lubricant and filter 52,000 miles, 84 000 kilometers or 6 months.
Steering Gear. IH Power Steering Fluid (1 quart can No. 990625-C1).
With chassis load on axle, force grease through thrust bearings. Then with axle lifted clear of floor, force grease
between king pin and bushing surfaces. Use IH 251 H EP grease.
Use straight mineral oil SAE 90 for temperatures O°F (-180C) and up. Use SAE 80 for temperatures below 0°F (-
180C). Special Recommendations: Where temperature is consistently below 0°F (-180C) and where parked vehicles are
exposed to unusual cold for long periods, use SAE 75. Where temperatures are consistently above 900F (320C) or
unusually hot, use SAE 140 straight mineral oil.