Big 7 Multipurpose EP Gear lubricant contains selected and refined base oils and modern additives with a polymer. These base oils and modern additives with a polymer. These base oils have exceptional resistance to oxidation, are highest in natural Viscosity Index, possess tough film strength to keep metal surfaces separated, and are best in inherent moisture resistance .This blend provides outstanding performance in automobiles, light and heavy-duty trucks, construction and farm equipment as well as Industrial gear units.
It’s extremely high quality is further enhanced by use of a sulfur/phosphorous type of additive that increases its load carrying properties to give gears additional protection. The maximum level of sulfur/phosphorus (“sp” type) EP additive provides superior anti-wear and anti-scuff lubrication even under the most severe service conditions.
A powerful additive package has been included for maximum rust, corrosion, and oxidation resistance. An anti-foam agent breaks up entrapped air bubbles as they form, keeping entrapped air bubbles as they form, keeping operating temperatures low. With lower temperatures, less pressure buildup and control of acid formation, seals remain pliable and last longer.
Big 7 Gear Lubricant has excellent adhesive qualities which give the lubricant the ability to cling tenaciously to metal surfaces allowing it to follow the gears instantly at start-up and provide immediate protection.
Applications：
Big 7 Gear Lubricant meets the demanding requirements to all types of enclosed gears- spur, worm, hypoid, and their variations. This versatile lubricant gives excellent performance in differentials, mechanical transmissions, steering gears, speed reducers, gear reducers, hypoid gears, helical gears, worm gears, spiral bevel final drives, industrial gears. Big 7 Gear Lubricant is especially recommended for automotive axles requiring a Hypoid EP lube including break-in, competition service, drain and refill, “limited slip” type axles and add-to or make up.
Performance Characteristics
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U.S. Government Military Specifications MIL-L-2105B and MIL-L-2105C API GL-3Mild EP, GL-4 Hypoid EP，GL-4 Hypoid EP, GL-5 Break-in Hypoid EP, GL-High Performance Hypoid
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Limited Slip Axle Lubrication
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CRC-L-37 and CRC-L-42 Axle Tests
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International Harvester 135 EP Gear Lube
Advantages
▪ Multiple viscosity grades with extra high viscosity index span
▪ Widest temperature range for all season use and for different climates
▪ Recommended for all automotive axles requiring a Hypoid EP including “break-in” and “add-to” for limited slip types
▪ Maximum level of Sulfur Phosphorus EP Additive
▪ Thermal stability
▪ Protects against rust and corrosion
▪ Lubricates limited slip axles
▪ EP additives protect against scoring, scuffing and welding
Lower operating costs
▪ Eliminates dry starts
▪ Will not emulsify with water
Typical Specifications：
|
BAE Grade
|
80w/90
|
85w/140
|
|
AGMA EP Lubricant Number
|
Between 4 EP and 5 EP
|
7EP
|
|
API Gravity ○F
|
28.1
|
25.8
|
|
Specific Gravity @ 60○F
|
0.8866
|
0.8996
|
|
Pounds/Gallon @ 60○F
|
7.383
|
7.491
|
Viscosities:
cp @ cold Temp ○F(℃)
SUS @ F(cSt @ 37.80℃)
SUS @F(cSt @ 98.9℃)
|
142000, @ -15○F
(-26.1℃)
815 (176.1)
88.3 (17.6)
|
45,000 @ +10○F
(12.2℃)
2043 (441)
150.7 (31.8)
|
|
Viscosity Index
|
121
|
113
|
|
Flash Point, COC ○F (℃)
|
410 (210)
|
425 (220)
|
|
Pour Point, ○F (℃）
|
-20 (-29)
|
0 (-10)
|
