Physical and Chemical Properties

CHECKING AND FILLING PLANETARY WHEEL ENDS

RECOMMENDED LUBRICANTS FOR CLARK DRIVE AXLES

Prevailing Ambient

SAE Specification

Original Fill,

Temperature

of Viscosity

Subsequent Fills,

Always check lubricant level in planetary wheel ends, with wheel hub thrust cap oil level plug in a down

or Refills use only

position. The wheel hub oil filler plug, located on the outer diameter of the wheel hub, will be within 35"

Below minus 10F.

MIL-L-10324A

Extreme Pressure

of top dead center. Remove thrust cap level plug. If lubricant is below oil level hole, remove filler plug

Minus 10F. to Zero

SAE-80

(E.P.) " CL"

and fill to oil level hole. Reinstall pipe plugs. When filling wheel hub through oil level hole in thrust cap,

(Sulfo. Chloro.Lead)

remove vent plug above oil level plug before filling.

Zero to 100F

SAE-90

See Clark Recommended

Lubricant Specification

INTERAXLE DIFFERENTIAL

Above 100F.

SAE-140

Number MS-8

For All Normal Prevailing

SAE-90

DO NOT ADD DIFFERENT

Ambient Temperatures

TYPE OF LUBRICANT

To fill axles with interaxle differential, add four (4) pints of lubricant in the input shaft differential case

Note: SAE-80 and SAE-140 are not covered by Clark Lubricant Specification MS-8;

filler hole, install filler plug. Fill axle center until oil drips from bottom of filler hole, install housing filler

these viscosities, when used, should contain additives, as in MS-8.

plug.

MS-8 EXTREME PRESSURE GEAR LUBRICANT

FILLING DRIVE AND DRIVE STEER AXLES

This specification covers a lubricant for use In gear cases to lubricate gears and pinions.

Axles with single or double reduction at center: Fill axle housing through center filler hole until lubricant

It shall be a well refined mineral oil properly compounded with sulphur-chlorine-lead (SCL) type extreme pressure additives.

is at bottom of filler hole.

It shall be free of fillers or abrasives, such as fuller's earth, talc, graphite, cork, etc. It shall be stable, non-abrasive and non-

corrosive to the materials used in the case gear mechanism whether or not in the presence of small percentages of water.

Axles with planetary wheel ends: Follow procedure in "checking and filling planetary wheel ends."

Physical and Chemical Properties

DRIVE STEER JOINT LUBRICATION

Saybolt Universal Viscosity @ 210 .................... 90-100 seconds

Sulphur (Total) ................................ ................................ . 3.00% Min.

Saybolt Universal Viscosity @ 100 ................1400 seconds Max.

Chlorine ................................ ................................ ............ 1.20% Min.

When Bendix-Weiss Joint Axle Shafts are used-remove pipe plug in spindle support and fill joint housing

A.P.I. Gravity ................................ .................... 13.6-15.9 degrees

Lead as Lead Oxide (PbO) ................................ .................. 1.7% Min.

with (E.P.) Extreme Pressure Lithium Soap Base Grease No. 1. Reinstall pipe plug. DO NOT ADD

Pour Point ................................ .......................... Minus 10 . Max.

Moisture

. ................................ . .20% Max.

DIFFERENT TYPE GREASE.

Flash Point ................................ ................................ ..350 . Min.

Load Carrying Capacity (Timken Test) ............. 70 Ibs. lever load Min.

Fire Point ................................ ................................ ....400 . Min.

Abrasion Test (33 lbs., 6 hrs.) .................... 2.0 milligrams loss, Max.

When Mechanics Joint Axle Shafts are used-grease with ordinary chassis grease.

Sulphur (Added) ................................ ........................... 1.20% Min.

SAE Test 750 RPM ................................ ........................ 350 lbs. Min.

Heat Test (oxidation)

Steering trunnion bearings should be lubricated with General Purpose Wheel Bearing Grease No. 2.

Weigh 200 grams of sample into 400 CC beaker 3" in diameter. Heat in electric oven equipped with automatic temperature control,

but without fan or turntable, maintaining temperature between 185F. and 200F. for approximately 8 hours per day. Turn off heat

nights, Saturdays and Sundays, leaving sample in oven. After 125 hours of heating (approximately 22 days elapsed time), cool,

weigh and determine viscosity. It shall not show a change in viscosity at 210F. of over 10%, nor an evaporation loss of over 4%.

FLUSHING

After draining, axles should be flushed. Replace drain plugs and fill axles to proper level with a light

flushing oil. Operate the axles for a short period of time, then drain. Be sure to drain all of the flushing

oil before refilling with new oil. Inspect the magnetic drain plug for metal particles or other foreign

matter indicative of wear or possible failure. When refilling, cleanliness is extremely important.

Note: Specifications are subject to change.