Astm stp 512a 1991

controlled at 220 +_ 3~ 3.1.5 - Change "gallon/hour" to "cubic feet per hour" 5.7 - Sentence should read "Install the air-box thermocouple in the Copyright by ASTM Int'l all rights reser

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Corrections - STP 512A

Phone 610832.9500 Fax 670.832.9555 e-maH serwce,~astm.org Web ww~astm.org

Item 2 - Change "Hub O.D." to "Hub I.D."

Item 3 - Change "Hub I.D." to "Hub O.D."

Asterisk at bottom of page refers to location 4, axle housing cover Note 3 - Change controlled at 220 +_ 3~

3.1.5 - Change "gallon/hour" to "cubic feet per hour"

5.7 - Sentence should read "Install the air-box thermocouple in the

Downloaded/printed by

University of Washington (University of Washington) pursuant to License Agreement No further reproductions authorized.

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air-box cover so that the tip is 3 inches "

6.2 - Change "0.3 gallon/hour" to "0.3 cubic feet/hour"

First Line - Change "lubricant" to "lubricants"

Heading - " T e s t Oil Viscosity " change to "AST 1 D445" to "ASTM D445"

Last Line - Change "Benzene Insolubles (uncoagulated) to "Toluene Insolubles (uncoagulated)"

The word "Alloy" should be "Allow"

Trang 5

Library of Congress C a t a l o g i n g - i n - P u b l i c a t i o n Data

Laboratory p e r f o r m a n c e tests for automotive gear lubricants

intended for API GL-5 service

(ASTM special technical publication; 512A)

"ASTM p u b l i c a t i o n code number (PCN) 04-512000-13."

i L u b r i c a t i o n and lubricants Testing

2 A u t o m o b i l e s - - G e a r i n g - - L u b r i c a t i o n I A S T M Committee D-2 on

ISBN 0-8031-0940-7

Copyright @ by AMERICAN SOCIETY FOR TESTING AND MATERIALS,

NOTE The Society is not responsible, as a body,

for the statements and opinions advanced in this publication

Printed in Baltimore, MD March 1987

Reprinted in Philadelphia, PA September 1991

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F O R E W A R D

This report is made a v a i l a b l e for those interested in the

p e r f o r m a n c e of l u b r i c a t i n g oils as a material of engineering The procedures are part of the technical language used for

describing the p e r f o r m a n c e of a u t o m o t i v e gear lubricants which will satisfy manual transmission and axle r e q u i r e m e n t s of m o d e r n passenger cars and trucks

The information contained herein has not been s u b j e c t e d to

ASTM's full consensus balloting and review procedures, and the test methods d e s c r i b e d have no official status as A S T M

a c c o m p l i s h e d through s i m u l t a n e o u s balloting by A S T M Section

D02.B03 on Gear Lubricants and S u b c o m m i t t e e D02.B on A u t o m o t i v e Lubricants

C o p y r i g h t b y A S T M I n t ' l ( a l l r i g h t s r e s e r v e d ) ; S u n J a n 3 2 1 : 5 1 : 4 0 E S T 2 0 1 6

D o w n l o a d e d / p r i n t e d b y

U n i v e r s i t y o f W a s h i n g t o n ( U n i v e r s i t y o f W a s h i n g t o n ) p u r s u a n t t o L i c e n s e A g r e e m e n t N o f u r t h e r r e p r o d u c t i o n s a u t h o r i z e d

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T A B L E O F C O N T E N T S

I N T R O D U C T O R Y I N F O R M A T I O N

I n t r o d u c t i o n 1

S c o p e 1

M i l i t a r y A p p r o v a l 3

A P I G L - 5 G e a r T e s t s 3

A P I G L - 5 B e n c h T e s t s 3

R e f e r e n c e O i l s ~ 4

P r e c i s i o n 4

A d d i t i o n a l R e q u i r e m e n t s for M i l i t a r y A p p r o v a l 5

A p p e n d i c e s 7

S E C T I O N 1 ( L - 3 3 T E S T ) P e r f o r m a n c e T e s t f o r E v a l u a t i n g t h e M o i s t u r e C o r r o s i o n T e n d e n c i e s o f A u t o m o t i v e G e a r L u b r i c a n t s S c o p e ii

A p p l i c a b l e D o c u m e n t ii

S u m m a r y o f M e t h o d ii

S i g n i f i c a n c e 12

A p p a r a t u s 13

R e a g e n t s a n d M a t e r i a l s 16

O i l B l e n d S a m p l i n g R e q u i r e m e n t s 16

T e s t O i l S a m p l e 16

P r e p a r a t i o n of A p p a r a t u s 16

C a l i b r a t i o n 19

T e s t P r o c e d u r e 20

D e t e r m i n a t i o n o f T e s t R e s u l t s 21

F i n a l T e s t R e p o r t 22

P r e c i s i o n a n d B i a s 23

A n n e x e s 24

A p p e n d i c e s 31

S E C T I O N 2 ( L - 3 7 T E S T ) P e r f o r m a n c e T e s t for E v a l u a t i n g t h e L o a d C a r r y i n g C a p a c i t y o f A u t o m o t i v e G e a r L u b r i c a n t s U n d e r C o n d i t i o n s of L o w S p e e d a n d H i g h T o r q u e S c o p e 45

A p p l i c a b l e D o c u m e n t 45

S u m m a r y o f M e t h o d 45

S i g n i f i c a n c e 46

A p p a r a t u s 47

M a t e r i a l s 49

P r e c a u t i o n s 49

O i l B l e n d S a m p l i n g R e q u i r e m e n t s 49

T e s t O i l S a m p l e 49

P r e p a r a t i o n o f A p p a r a t u s 49

C a l i b r a t i o n 51

T e s t P r o c e d u r e 52

D e t e r m i n a t i o n o f T e s t R e s u l t s 54

F i n a l T e s t R e p o r t 55

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A n n e x e s 57

S E C T I O N 3 (L-42 TEST) P e r f o r m a n c e T e s t for E v a l u a t i n g the L o a d C a r r y i n g C a p a c i t y of A u t o m o t i v e G e a r L u b r i c a n t s U n d e r C o n d i t i o n s of H i g h S p e e d S h o c k L o a d i n g S c o p e .67 S a m p l e ' S i z e i [ [ i [ [ i [ [ [ [ [ [ [ [ [ [ [ [ i [ [ [ [ [ [ i [ i [ i [ i [ [ i [ [ [ [ i [ ~ [ i [ [ ~ [ [ 6 7 A p p a r a t u s 67

M a t e r i a l s 70

P r o c e d u r e s 70

S t a n d C a l i b r a t i o n 73

T e s t R e p o r t 73

A n n e x 75

S E C T I O N 4 (L-60 TEST) P e r f o r m a n c e T e s t for E v a l u a t i n g the T h e r m a l O x i d a t i o n S t a b i l i t y of A u t o m o t i v e G e a r L u b r i c a n t s S c o p e 85

S u m m a r y of M e t h o d 85

A p p a r a t u s

P r e p a r a t i o n ' f o r T e s t [ [ [ [ [ [ [ [ [ [ i [ [ [ [ ' [ i [ [ [ [ [ [ [ [ [ [ ' [ [ [ ' [ [ [ ~ i [ i [ [ 8 5 86

A s s e m b l y of T e s t A p p a r a t u s 88

P r o c e d u r e 89

T e s t D a t a a n d R e p o r t i n g 90

S t a n d C a l i b r a t i o n 91

T e s t R e p o r t 92

A n n e x e s 94

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I N T R O D U C T I O N

c o m p i l a t i o n of the a u t o m o t i v e gear lubricant tests used to

services are p r e s e n t l y c o n s i d e r e d o b s o l e t e by API because: the test e q u i p m e n t o r i g i n a l l y used to define these s e r v i c e s is no longer available; and a l t e r n a t e e q u i p m e n t / p r o c e d u r e s have not

contains 1987 v e r s i o n s of the original GL-5 p e r f o r m a n c e tests updated under the g u i d a n c e of ASTM

Gear l u b r i c a n t s have changed s i g n i f i c a n t l y over the past four decades in response to p e r f o r m a n c e demands imposed by changes in

o p e r a t i n g conditions, design and m e t a l l u r g y of a u t o m o t i v e axles

A u t o m o t i v e Manual T r a n s m i s s i o n s and Axles ~ allows m a t c h i n g

six L u b r i c a n t Service D e s i g n a t i o n s , (API GL-I through GL-6)

states in q u a l i t a t i v e terms the kind of s e r v i c e in w h i c h a gear

of gears and the o p e r a t i n g c o n d i t i o n s for the l u b r i c a n t are

included in each Service Designation

S u p p l e m e n t i n g of the q u a l i t a t i v e API D e s i g n a t i o n s with

p e r f o r m a n c e d e f i n i t i o n s is needed p a r t i c u l a r l y for D e s i g n a t i o n s

series of tests and a s s o c i a t e d m i n i m u m p e r f o r m a n c e requirements Under the API, ASTM, SAE T r i p a r t i t e System, a L u b r i c a n t

P e r f o r m a n c e and Service C l a s s i f i c a t i o n M a i n t e n a n c e P r o c e d u r e - SAE Ji146 November 1980 (1986 SAE H a n d b o o k 3:23.47) - is

d e s i g n e d to keep abreast of c h a n g i n g r e q u i r e m e n t s by r e d e f i n i n g existing categories, adding new or d e c l a r i n g as o b s o l e t e

system, A S T M is r e s p o n s i b l e for d e f i n i n g the technical l a n g u a g e (test t e c h n i q u e s and p e r f o r m a n c e criteria), w h i l e API d e f i n e s

d e s i g n a t i o n s as well as other items of i n f o r m a t i o n are p u b l i s h e d

in the SAE H a n d b o o k under "Axle and Manual T r a n s m i s s i o n

L u b r i c a n t s " - SAE J308 Nov 82 (1986 SAE H a n d b o o k 3:23.20)

S C O P E

The p u r p o s e of this p u b l i c a t i o n is to p r o v i d e d e t a i l e d

independent test p r o c e d u r e s are required to d e f i n e API GL-5

Service (Table I)

The API GL-5 Service D e s i g n a t i o n is important b e c a u s e it

IAPI P u b l i c a t i o n No 1560 a v a i l a b l e from the A m e r i c a n P e t r o l e u m Institute, 2101 L Street, Northwest, Washington, D C 20037

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2 AUTOMOTIVE GEAR LUBRICANTS

represents the most commonly specified and c o m m e r c i a l l y

that 80 percent of gear lubricants p r o d u c e d are formulated to satisfy the API GL-5 Service Designation

API GL-5 p e r f o r m a n c e tests o r i g i n a t e d with the U.S Army Gear

encompass m u l t i g r a d e oils, SAE 80W-90 and 85W-140 in 1976 (MIL- L-2105C), but p e r f o r m a n c e requirements were unchanged

T A B L E i API GL-5

moisture Resistance to gear distress under the conditions of low speed high torque Resistance to gear distress (scoring) under conditions of high speed and

shock loads Thermal o x i d a t i o n stability

presence of copper and copper alloys

* T h e s e test m e t h o d s a r e a v a i l a b l e in A S T M ' s A n n u a l B o o k o f

S t a n d a r d s , Vol 05.01

In 1987 M I L - L - 2 1 0 5 C was replaced by M I L - L - 2 1 0 5 D (allowing the use of re-refined base oils) without a change in p e r f o r m a n c e

It should be noted that several differences exist between API

the six API GL-5 p e r f o r m a n c e tests, M I L - L - 2 1 0 5 D also requires:

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INTRODUCTORY INFORMATION 3

(FTM 3455.1)

base stocks, e.g., s y n t h e t i c components

R e v i e w Institute)

and E n g i n e e r i n g Center

API GL-4 and GL-6 Service D e s i g n a t i o n s are c o n s i d e r e d to be

o b s o l e t e since the e q u i p m e n t used in p e r f o r m i n g one or m o r e of

type of testing cannot be p e r f o r m e d on new oils, l u b r i c a n t s of these types (API GL-4 and GL-6) may be a v a i l a b l e via p r e v i o u s l y

new tests to d e s c r i b e lubricant a p p l i c a t i o n s requiring other

than API GL-5 service oils

M I L I T A R Y A P P R O V A L

Gear lubricants p u r c h a s e d by the U.S Military, N A T O a f f i l i a t e s and some federal, state and local g o v e r n m e n t a g e n c i e s must be

are reviewed is o u t l i n e d in the LRI Gear L u b r i c a n t R e v i e w

C o m m i t t e e p r o c e d u r e s a v a i l a b l e from SAE at the address below:

Society of A u t o m o t i v e E n g i n e e r s

400 C o m m o n w e a l t h Drive Warrendale, PA 15096

A P I G L - 5 G E A R T E S T S

The following sections detail the four test p r o c e d u r e s for API

Test Method); S e c t i o n 3 (L-42 Test Method); and S e c t i o n 4 (L-60 Test Method)

A P I G L - 5 B E N C H T E S T S

C o p p e r C o r r o s i o n ( A S T M D 130)

Copper c o n t a i n i n g m e c h a n i c a l c o m p o n e n t s such as t h r u s t w a s h e r s

and s y n c h r o n i z e r elements, may be found in axles and

t r a n s m i s s i o n s where gear lubricant use is specified

Consequently, it is important that these l u b r i c a n t s are e q u a l l y

130 - M e t h o d for D e t e c t i o n of Copper C o r r o s i o n from P e t r o l e u m

Products by the Copper S t r i p T a r n i s h Test (Vol 05.01) - is used

in c o m b i n a t i o n with a p p r o p r i a t e limits to define the d e g r e e of copper c o r r o s i o n p r o t e c t i o n p r o v i d e d by gear lubricants

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Foaming Tendency (ASTM D 892)

C h u r n i n g and a g i t a t i o n of the l u b r i c a n t in the a x l e can result

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under code by:

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6 AUTOMOTIVE CEAR LUBRICANTS

MIL-L-2105D Field Test Requirements

The following are excerpts from the LRI "Procedures of the Gear Lubricants R e v i e w Committee for R e v i e w at Gear L u b r i c a n t s Under

M i l i t a r y S p e c i f i c a t i o n MIL-L-2105C" (October 1985)

Field test information (to d e m o n s t r a t e s a t i s f a c t o r y field

service performance) is required when the following are used:

index improvers and c o m b i n a t i o n s thereof

treatment of base stocks, or new types of base stocks

or combinations thereof

temperature flow improvers ("pour point d e p r e s s a n t s " )

No changes in field test requirements are a n t i c i p a t e d to

a c c o m p a n y M I L - L - 2 1 0 5 C to M I L - L - 2 1 0 5 D change

Additional information may be o b t a i n e d by contacting the Gear Lubricant Review Committee Secretary at SAE World H e a d q u a r t e r s (address below)

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L-33 PERFORMANCE TEST ii

L - 3 3 T E S T ( f o r m e r l y C R C L - 3 3 T e s t a n d

F T M S 7 9 1 B M e t h o d 5 3 2 6 1 )

I S C O P E

e v a l u a t i n g the rust and c o r r o s i o n i n h i b i t i n g p r o p e r t i e s

of a gear lubricant w h i l e s u b j e c t e d to water

c o n t a m i n a t i o n and e l e v a t e d t e m p e r a t u r e in a b e n c h -

m o u n t e d hypoid d i f f e r e n t i a l housing (carrier)

a b b r e v i a t e d test of one day may also be run

p u r p o r t to address all of the safety p r o b l e m s a s s o c i a t e d

this test m e t h o d to e s t a b l i s h a p p r o p r i a t e s a f e t y and health p r a c t i c e s and d e t e r m i n e the a p p l i c a b i l i t y of

r e g u l a t o r y l i m i t a t i o n s prior to use

2 A P P L I C A B L E D O C U M E N T

T e r m i n o l o g y

R e v i e w C o m m i t t e e and A S T M (Section D.02 B.03) have

a d o p t e d the following c r i t e r i a to d i f f e r e n t i a t e b e t w e e n

transparent, it is c o n s i d e r e d to be stain rather than

the c a n d i d a t e lubricant has failed the test."

3 S U M M A R Y O F M E T H O D

hypoid d i f f e r e n t i a l h o u s i n g (carrier) assembly, Part No 27770-IX, 4.10 ratio, s t a n d a r d d i f f e r e n t i a l w i t h

u n c o a t e d drive gear and drive p i n i o n (ring and pinion)

a s s e m b l y is c o m p l e t e l y d i s a s s e m b l e d and cleaned, the cover sandblasted, all internal parts and s u r f a c e s

then installed on the test rig; next, an oil t e m p e r a t u r e

m o n i t o r i n g probe and a drive shaft are connected, then a cooling fan and heat lamps are p l a c e d into p o s i t i o n near the test unit

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3.3 M o t o r i n g P h a s e

M o t o r i n g Phase - The test unit is charged with 2.5 pt (1.2 L) of test oil, then driven by an electric motor at

2500 rpm p i n i o n speed in an u n l o a d e d c o n d i t i o n (no axle

of d i s t i l l e d water is added and a pressure relief valve, set at 1 psi (approx 7 kPa) is installed in the oil fill opening (all other test unit openings are already

m o t o r i n g phase continues for four hours at this

c o n t r o l l e d temperature

3.4 S t o r a g e P h a s e

At the c o m p l e t i o n of the m o t o r i n g phase, the m o t o r i n g is stopped; drive shaft, heat lamp and fan are removed Next, an a l u m i n u m box with double walls and fan for air

c i r c u l a t i o n and heat elements with t e m p e r a t u r e

phase requires 162 h or a p p r o x i m a t e l y seven days at 125

static position)

NOTE 1 - A test with a s h o r t e n e d storage phase is only 18 h

(special o n e - d a y test) may be run as a screening test

the d i f f e r e n t i a l a s s e m b l y is then d i s a s s e m b l e d and rated for rust and corrosion, sludge, and other deposits

4 S I G N I F I C A N C E

4.1 M e t h o d

severe field service in which c o r r o s i o n - p r o m o t i n g

m o i s t u r e in the form of condensed water vapor has

as a result of volume expansion and c o n t r a c t i o n of the axle lubricant and the a c c o m p a n i e d "breathing in" of m o i s t u r e - l a d e n air through the axle vent

s p e c i f i c a l l y to provide a c o r r e l a t i o n to field experience The c o r r e l a t i o n a c h i e v e d will p r o v i d e

m o i s t u r e c o r r o s i o n of the type found in actual field service although formal c o r r e l a t i o n p r o g r a m s have not yet been run

4.2 V a l i d i t y o f T e s t s

on c o m p l i a n c e with all requirements of this test

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m e t h o d is used f o r m a l l y in s p e c i f i c a t i o n s for gear

is used to assess and compare p e r f o r m a n c e levels

r e q u i r e m e n t s for the o p e r a t i n g area

a t m o s p h e r e in the test unit b u i l d - u p area be

f i l t e r e d and m a i n t a i n e d at u n i f o r m t e m p e r a t u r e and low h u m i d i t y to prevent a c c u m u l a t i o n of dirt or rust on test parts

is c o n d u c t e d against a white b a c k g r o u n d using a lamp with two 15-watt c o o l - w h i t e f l u o r e s c e n t bulbs

Trang 23

b e e n found to be s u i t a b l e to turn the drive p i n i o n

- U.S M o t o r s i.i s h o u l d be Kw (1.5 hp), e n c l o s e d ,

3600 rpm, 0.87 in (2.22 cm) dia shaft

- Slide Motor Base, " D y n - A d j u s t " No 20-C

- D o d g e "Taper Lock" p u l l e y s No 4 0 L I O 0 (driven) and # 2 8 L I O O (Drive)

- D o d g e "Timing" Belt No 480LIOO

- A d d i t i o n a l c o m p o n e n t s such as shafts, c o u p l i n g s , and b e a r i n g b l o c k s are a l s o n e c e s s a r y to c o n n e c t the a b o v e c o m p o n e n t s to d r i v e the c a r r i e r

pinion, but are left to the o p t i o n of the

t e s t i n g l a b o r a t o r y

i n t e r n a l vapor p r e s s u r e is c o n t r o l l e d d u r i n g the

w a r m - u p p o r t i o n of the m o t o r i n g p h a s e by a James,

No 2 5 9 B - 2 P P set for 1 psi (approx 7 kPa)

c o n n e c t e d to the h o u s i n g (carrier) cover w i t h a 3/4 in NPT s t a i n l e s s steel 90 street ell

5.2.3.1 H o u s i n g (Carrier) Cover G a s k e t - The h o u s i n g

(carrier) cover gasket must be cut from

m a n i l a file folder m a t e r i a l ; test

d e v e l o p m e n t has shown this m a t e r i a l to be

o p t i m u m b e c a u s e it is not p r o n e to water

a b s o r p t i o n and t h e r e f o r e m i n i m i z e s r u s t i n g

c o r r o s i o n at the cover p l a t e / h o u s i n g interface

5.2.3.2 H o u s i n g (Carrier) A x l e Tube O p e n i n g Seals -

Since the d i f f e r e n t i a l is tested w i t h o u t axle shafts or axle tubes, the h o u s i n g

shows c o n s t r u c t i o n d i m e n s i o n s for

f a b r i c a t i n g a pair of seals to be i n s t a l l e d

in the axle h o u s i n g (carrier) o p e n i n g s

b e f o r e i n t r o d u c i n g test oil prior to

Trang 24

H o n e y w e l l R e c o r d e r / C o n t r o l l e r (Model 4 5 2 C I L - 3 3 - L I -

are d i r e c t e d toward the d i f f e r e n t i a l or; a

h o u s e h o l d - t y p e e l e c t r i c cooling fan having 12 in

l o c a t i o n of the heat lamp pair and the c o o l i n g

sensor in the d i f f e r e n t i a l housing (carrier)

5.2.5 S t o r a g e B o x and T e m p e r a t u r e Control System,

test, a d o u b l e - w a l l e d a l u m i n u m box covers the

d i f f e r e n t i a l housing (carrier) assembly, and the bulk oil t e m p e r a t u r e is c o n t r o l l e d at 125•176

17752 or e q u i v a l e n t regulates heat input from four IIOV, 500W strip heaters, C h r o m o l o x C a t a l o g No

watts, D a y t o n Electric Model 4KI02 or e q u i v a l e n t turns a f a b r i c a t e d impeller to p r o v i d e air

c o n s t r u c t i o n and e l e c t r i c a l details of this equipment

5.2.6 S a n d b l a s t i n g E q u i p m e n t and M a t e r i a l

m a n u f a c t u r e r ' s p r e c a u t i o n s should be c o n s u l t e d and followed

S a n d b l a s t i n g of the d i f f e r e n t i a l housing cover is

s p e c i f i e d and requires that sand of the f o l l o w i n g

s p e c i f i c a t i o n be used:

A m e r i c a n F o u n d r y m a n ' s Society grain fineness No

26 Moh hardness of 7 99.8% Si02

W e d r o n Sand No 4098 a v a i l a b l e from W e d r o n Silica Company, 50 Line Road, P.O Box 119, Wedron,

S a n d b l a s t i n g must p r o d u c e a u n i f o r m surface on the cover p l a t e and a p p r o x i m a t e l y 1 qt (.95L) of sand

is n e c e s s a r y and must be a p p l i e d using i00 psi

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The test sample must be representative of the lubricant

formulation being evaluated and must be uncontaminated

8 T E S T O I L S A M P L E

M i n i m u m Sample Q u a n t i t y - 1.0 gal (3.7L) of test oil is

2.5 pt (I.2L); the remaining oil is used for coating test parts during b u i l d - u p assembly

9 P R E P A R A T I O N O F A P P A R A T U S

9.1 Test S t a n d P r e p a r a t i o n

9.1.1 Cleaning of Reused Fittings, Seals, etc - Clean,

tube opening seals, pressure relief valve and elbow, and the p l a t i n u m resistance temperature sensor and its fittings

9.2 D i f f e r e n t i a l H o u s i n g (Carrier) A s s e m b l y B u i l d - U p

9.2.1 Cleaning and P r e p a r a t i o n of Parts

9.2.1.1 Disassembly - Completely d i s a s s e m b l e the

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L-33 PERFORMANCE TEST 17

d i f f e r e n t i a l h o u s i n g (carrier) assembly, remove all parts including p i n i o n and side gears from the d i f f e r e n t i a l case

9.2.1.2 Carrier H o u s i n g M o d i f i c a t i o n - Refer to Fig 3,

drill and tap the h o u s i n g (carrier) to a c c e p t the p l a t i n u m r e s i s t a n c e t e m p e r a t u r e sensor

9.2.1.3 C l e a n i n g - Spray each c o m p o n e n t i n d i v i d u a l l y

w i t h S t o d d a r d Solvent and a l l o w to air dry

Be sure that all g r e a s e used in m a n u f a c t u r e r ' s

a s s e m b l y is removed from b e a r i n g s and lip seals

Do not use c o m p r e s s e d air to force dry, as it m a y

c o n t a i n enough m o i s t u r e to initiate rusting

9.2.1.4 I n s p e c t i o n - C a r e f u l l y inspect all parts for

E n d - o f - t e s t i n s p e c t i o n and rating make no

a l l o w a n c e s for parts rusted b e f o r e start of test

which must be replaced if rust is found, rust may be removed by s a n d b l a s t i n g (see p a r a g r a p h 5.2.6)

s a n d b l a s t i n g was n e c e s s a r y to remove rust, this

i n f o r m a t i o n must be noted on the data s u m m a r y (see Annex AI)

9.2.1.6 H o u s i n g Cover Plate P r e p a r a t i o n - The h o u s i n g

cover plate inside surface must be u n i f o r m l y

s a n d b l a s t i n g , pour S t o d d a r d solvent over the

use c o m p r e s s e d air to force dry, as it may

c o n t a i n enough m o i s t u r e to initiate rusting

Next, rinse with a c e t o n e and a l l o w to air dry

See A n n e x A3

V a p o r s m a y c a u s e flash fire

9.2.1.7 Test Oil C o a t i n g - Coat all interior carrier

surfaces, and all internal parts with test oil;

a p p r o x i m a t e l y o n e - h a l f liter of test oil over

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the cover plate after it has b e e n s a n d b l a s t e d

then a l l o w excess oil to drain

9.2.2 A s s e m b l y of Test Unit

N O T E 3 - Do not touch any test p a r t s w i t h bare h a n d s - -

F i n g e r p r i n t s can cause rusting

9 2 2 1 Drive P i n i o n Shaft I n s t a l l a t i o n - A s s e m b l e the

drive p i n i o n shaft w i t h its b e a r i n g s and install

t o r q u e s on the test data sheet (Annex AI)

N O T E 4 - For p r o p e r s h i m s e l e c t i o n w h e n c h a n g e s are n e c e s s a r y ,

refer to Spicer A x l e D i v i s i o n B u l l e t i n No 5304-1, pages 27 t h r o u g h 41

9.2.2.2 D i f f e r e n t i a l Case I n s t a l l a t i o n - A s s e m b l e the

d i f f e r e n t i a l pinion, side gears, shafts and

T h e n install the d i f f e r e n t i a l case a s s e m b l y in the d i f f e r e n t i a l carrier housing

D e t e r m i n e p i n i o n t u r n i n g torque for the

a s s e m b l e d test unit; break torque s h o u l d be 12

to 18 ib.in (1.35 to 2 N.m), t u r n i n g t o r q u e should be 7 to 13 ib.in (0.8 to 1.4 N.m.)

T h e s e torques may be a d j u s t e d by a d d i n g or

r e m o v i n g shims at the d i f f e r e n t i a l case

torques on the test data sheet (Annex AI)

N O T E 5 - For p r o p e r s h i m s e l e c t i o n w h e n c h a n g e s are n e c e s s a r y ,

refer to Spicer A x l e D i v i s i o n B u l l e t i n No 5304-1,

p a g e s 27 t h r o u g h 41

9.2.2.3 Cover Plate, Seals, T e m p e r a t u r e P r o b e

I n s t a l l a t i o n - I n s t a l l the cover p l a t e and a new m a n i l a gasket (see p a r a g r a p h 5.2.3.1) Insert the two axle tube o p e n i n g seals (Fig 2) until they touch the d i f f e r e n t i a l case

the p l a t i n u m r e s i s t a n c e t e m p e r a t u r e probe 9.3 I n s t a l l a t i o n of Test Unit

Install the a s s e m b l e d test unit on the test stand

the c o o l i n g fan and heat lamp pair as shown in Fig i

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the 90 Street elbow and loosely install the pressure relief valve

(82.2•176

the data log (Annex AI) then immediately start the driving motor

hazard and safety guards should be used, as well as having a conscious awareness of this danger

pinion rpm

a pipe plug in the open end of the relief valve

the time on the data log

(82.2•176

record the time on the data log then stop the driving motor

lamps and cooling fan from the test unit to allow the storage box to be put in place

switch on the internal c i r c u l a t i n g fan

internal heating system is switched "on" just as the test oil temperature falls to a p p r o x i m a t e l y

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s m o o t h l y fall to the d e s i r e d control t e m p e r a t u r e

the time w h e n the test oil t e m p e r a t u r e r e a c h e s

storage phase

or a p p r o x i m a t e l y seven days

(one-day test) m a y be run as a s c r e e n i n g test if

is identical to that for the s t a n d a r d s e v e n - d a y test except for the length of the storage phase time

11.3 E n d o f Test P r o c e d u r e

record the time on the data log, then switch off the storage box heating unit and c i r c u l a t i n g fan

test unit from the test stand

c o m p l e t e l y d i s a s s e m b l e the d i f f e r e n t i a l carrier assembly, remove all parts including p i n i o n and side gears from the d i f f e r e n t i a l case

remove used test oil; spray air p r e s s u r e cannot

may be blown with dry c o m p r e s s e d air to a v o i d stain lines caused by solvent action

R a t i n g should be c o n d u c t e d under the lighting c o n d i t i o n s

be a s s i g n e d a level value, either 0, i, 2, 5, or i0, u s i n g

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14 P R E C I S I O N A N D B I A S

P r e c i s i o n and bias of this test have not yet been f o r m a l l y established However, it is g e n e r a l l y c o n s i d e r e d that the

r e p e a t a b i l i t y of the L-33 M o i s t u r e C o r r o s i o n Test is very

good for gear l u b r i c a n t s w h i c h exhibit g o o d a n t i - c o r r o s i o n

c h a r a c t e r i s t i c s , but the r e p e a t a b i l i t y of this test when

c o n d u c t e d with a gear lubricant p o s s e s s i n g m a r g i n a l or poor

a n t i - c o r r o s i o n c h a r a c t e r i s t i c s is poor

N O T E 8 - See A p p e n d i x X-4 for R e f e r e n c e Oil Data

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24 AUTOHOTIVE GEAR LUBRICANTS

i

P l a c e h e a t lamps and f a n a s shown

H e a t lamps t o b e a p p r o x l m a t e l y 5 cm from h o u s i n g Fan t o b e a p p r o x i m a t e l y

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Housing

Drill & l ~ ~ tap for

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aluminum, welded seams

7 Plug, male (Amphenol No 615I, or equa!

8 Connector, female (Amphenol No 61F11,

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Start Avg

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Annex A2 Rating Sheet

At the LRI G e a r L u b r i c a n t s R e v i e w C o m m i t t e e M e e t i n g No 37, F e b r u a r y

14, 1985, this d e f i n i t i o n was d e v e l o p e d - "If the d e p o s i t or

d i s c o l o r a t i o n is t r a n s p a r e n t , it is c o n s i d e r e d to be s t a i n r a t h e r t h a n

l u b r i c a n t has f a i l e d the test a n d the C o m m i t t e e R e c o m m e n d a t i o n w i l l be 'Not A c c e p t a b l e ' "

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L-33 M o i s t u r e C o r r o s i o n Test

A3.1 Stoddard Solvent

Keep away from heat, sparks and open flame

Keep container closed

Use with adequate ventilation

Avoid breathing vapor or spray mist

Avoid prolonged or repeated contact with skin

A3.2 Acetone

Keep away from heat, sparks, and open flame

Keep container closed

Vapors may spread long distance and ignite explosively

Avoid build-up of vapors and eliminate all source of ignition, especially n o n - e x p l o s i o n proof electrical apparatus and

heaters

Avoid p r o l o n g e d breathing of vapor or spray mist

Avoid contact with eyes and skin

A3.3 Mobil Arma 245

Harmful or fatal if swallowed

Keep away from heat and open flame

Use only with adequate ventilation

Avoid prolonged or repeated skin contact

Avoid prolonged breathing of mist or vapor

immediately

A3.4 85% Concentrated P h o s p h o r i c Acid (H3P04)

clothing

Avoid breathing vapor or mist

Keep in tightly closed container

Loosen closure cautiously

Wash thoroughly after handling

Flood spill area with water spray

A3.5 Formula 30 Alcohol

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Fig Xl and X2 are e x a g g e r a t e d p i t s c h a r a c t e r i z i n g rust; Fig

Tiêu đề	Laboratory Performance Tests For Automotive Gear Lubricants Intended For API GL-5 Service
Trường học	University of Washington
Chuyên ngành	Lubrication and Lubricants
Thể loại	Special Technical Publication
Năm xuất bản	1991
Thành phố	Philadelphia

Định dạng
Số trang	111
Dung lượng	2,19 MB