NISSAN TERRANO 2004 Service Repair Manual

Ring Gear and Drive Pinion
Check gear teeth for scoring, cracking or chipping.
If any damaged part is evident, replace ring gear and drive pinion
as a set (hypoid gear set).
Differential Case Assembly
Check mating surfaces of differential case, side gears, pinion mate
gears, pinion mate shaft and thrust washers.
Bearing
1. Thoroughly clean bearing.
2. Check bearings for wear, scratches, pitting or flaking.Check tapered roller bearing for smooth rotation. If damaged,
replace outer race and inner cone as a set.
SPD648
SPD715
INSPECTION (R180A)
PD-20
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To avoid confusion while calculating bearing shims, it is absolutely
necessary to stay with the metric system. If you measure anything
in inches, the results MUST be converted to the metric system.
Drive Pinion Height
1. First prepare Tools for pinion height adjustment.
q
1Height gauge (ST31211000)
q
2Dummy shaft (ST31212000)
q
3Collar
q
4Feeler gauge
q
5Dummy shaft spacer (ST31851000)
q
6Stopper (ST31852000)
q
7Preload gauge (ST3127S000)
I Use a collar which has the specifications shown at left.
2. To simplify the job, make a chart, like the one below, to orga- nize your calculations.
LETTERS HUNDREDTHS OF
A MILLIMETER
H: Head number
D¢ : Figure marked on dummy shaft
S: Figure marked on height gauge
N: Measuring clearance
3. Write the following numbers down in the chart.
H: Head number
SPD633
SPD753
SPD542
ADJUSTMENT (R180A)
PD-21
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D¢: Figure marked on dummy shaft.
S: Figure marked on height gauge.
W: Thickness of drive pinion height adjusting washer which is 3.09 mm (0.1217 in).
4. Set Tool (dummy shaft) as shown at left and tighten drive pin- ion nut carefully to correct preload of 1.0 to 1.3 N ×m (10 to 13
kg-cm, 8.7 to 11.3 in-lb). Tool number: q
ADummy shaft (ST31212000)
q
BCollar
q
CDummy shaft spacer (ST31851000)
q
DStopper (ST31852000)
5. Attach Tool (height gauge) to gear carrier, and measure the clearance between the height gauge and the dummy shaft face.Tool number q
AHeight gauge (ST31211000)
q
BDummy shaft (ST31212000)
SPD627
SPD628
SPD754
SPD373
PD091
ADJUSTMENT (R180A)
Drive Pinion Height (Cont'd)
PD-22
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6. Substitute these values into the equation to calculate the thick-ness of the washer.
If values signifying H, D¢ and S are not given, regard them as
zero and calculate. T (Thickness of washer)
=W+Nþ[(HþD ¢þ S) x 0.01] þ 0.20
Example: W = 3.09
N = 0.33
H=+2
D¢=þ1
S=0
T=W+Nþ[(HþD ¢þ S) x 0.01] þ 0.20
(1) H ........................................................................\
.......2
þD¢ ........................................................................\
..þ(þ1)
+3
(2) þS ........................................................................\
.....þ0 +3
(3) +3 x0.01
+0.03
(4) W ........................................................................\
..3.09 +N ........................................................................\
+0.33 3.42
(5) þ[+0.03] 3.39
(6) þ0.20 3.19
7. Select the proper washer. (Refer to PD-57.)
If you cannot find the desired thickness of washer, use washer
with thickness closest to the calculated value.
Example:
Calculated value ... T = 3.19 mm
Used washer ... T = 3.18 mm
ADJUSTMENT (R180A)
Drive Pinion Height (Cont'd)
PD-23
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Side Bearing Preload
1. To simplify the job, make a chart like the one below to organizeyour calculations.
LETTERS HUNDREDTHS OF
A MILLIMETER
A þ Left housing
B þ Right housing
C þ Differential case
D þ Differential case
E þ Left side bearing
F þ Right side bearing
G
1þ Left side retainer
G
2þ Right side retainer
2. Write the following numbers down in the chart. A & B: Figures marked on final drive housing.
C & D: Figures marked on differential case.
G
1&G2: Figures marked on side retainer.
SPD650
SPD651
SPD652
ADJUSTMENT (R180A)
PD-24
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3. Measure how far under the standard thickness [20 mm (0.79in)] the side bearings are.
It will require tools shown below.
q
1Weight Block (ST32501000)
q
2Master Gauge (KV38101900)
q
3Base Plate
q
4Dial Indicator
4. Place the outer race of the opposite side bearing to the mea- sured.
5. Place a weight block on the outer race, and a master gauge on the block.Tool number: q
AST32501000
q
BKV38101900
6. Adjust dial indicator scale to zero.
7. Carefully slide master gauge and weight block out from under dial indicator.
8. Lubricate side bearing and place the bearing outer race and inner cone to be measured on the opposite side outer race.
If the bearing assembly is placed on the base plate, the bear-
ing width cannot be accurately determined due to its cage
being in contact with the base plate.
9. Place weight block (ST32501000) on side bearing.
10. Slide dial indicator on weight block.
11. Turn weight block a few times to ensure that bearing is prop- erly seated.
12. Read dial indicator.
I Normal indication:
0.10 - 0.30 mm (0.0039 - 0.0118 in)
I If the needle fluctuates erratically then bearing is either dirty or
defective and should be cleaned or replaced.
SPD048
SPD150
SPD050
SPD591
SPD051
ADJUSTMENT (R180A)
Side Bearing Preload (Cont'd)
PD-25
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13. Measure both bearing in the same way and write the left sidebearing measurement next to ªEº and the right side bearing
measurement next to ªFº.
14. Substitute these values into the equation to calculate the thick- ness of the shim.
If values signifying A, B, C, D, G
1and G2are not given, regard
them as zero and calculate. Left side:T
1=(A+C+G1þD)x0.01+0.76þE
Right side: T
2=(B+D+G2)x0.01+0.76þF
Example
A = 5 E = 0.11
B = 5 F = 0.15
C=3 G
1=4
D=3 G
2=1
Left side: Right side:
T
1=(A+C+G1þD)x0.01+0.76þE
=(5+3+4þ3)x 0.01 + 0.76 þ 0.11 T2=(B+D+G2)x0.01+0.76þF
=(5+3+1)x 0.01 + 0.76 þ 0.15
(1) A ........................................................5 (1) B .......................................................5 + C.....................................................+3 + D ....................................................+3 88
+G
1...................................................+4 + G2..................................................+1
12 9
þ D.....................................................þ3 9 (2) 9
(2) 9 x0.01 x0.01 0.090.09 (3) 0.09 +0.76
(3) 0.09 0.85 +0.760.85 (4) 0.85 þ0.15
(4) 0.85 0.70 þ E þ0.11 0.74 \T
2= 0.70 mm
\ T
1= 0.74 mm
15. Select the proper shims. (Refer to PD-57.)
If you cannot find the desired thickness of shims, use shims
with the total thickness closest to the calculated value.
ADJUSTMENT (R180A)
Side Bearing Preload (Cont'd)
PD-26
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Tooth Contact
Gear tooth contact pattern check is necessary to verify correct
relationship between ring gear and drive pinion.
Hypoid gear sets which are not positioned properly in relation to
one another may be noisy, or have short life span or both. With a
pattern check, the most desirable contact for low noise level and
long life can be assured.
1. Thoroughly clean ring gear and drive pinion teeth.
2. Sparingly apply a mixture of powdered ferric oxide and oil orequivalent to 3 or 4 teeth of ring gear drive side.
3. Hold companion flange steady by hand and rotate the ring gear in both directions.
SPD357
SPD653
NPD003
ADJUSTMENT (R180A)
PD-27
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Extension Tube and Differential Side Shaft
1. Measure rear axle bearing end play.Rear axle bearing end play (A þ B):0.1 mm (0.0039 in) or less
The end play can be adjusted with bearing adjusting shim.
(Refer to PD-57.)
2. Install oil seal.
3. Install the spacer, grease seal, extension tube retainer, adjust- ing shim, shim and shim collar onto the differential side shaft.
4. Install differential side shaft assembly into extension tube.
SPD699
SPD654
SPD655
ASSEMBLY (R180A)
PD-28
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Differential Case
1. Measure clearance between side gear thrust washer and dif-ferential case.Clearance between side gear thrust washer and differ-
ential case (A þ B): 0.10 - 0.20 mm (0.0039 - 0.0079 in)
The clearance can be adjusted with side gear thrust washer.
(Refer to PD-57.)
2. Apply gear oil to gear tooth surfaces and thrust surfaces and check to see the turn properly.
3. Install L.H. and R.H. differential cases.
4. Place differential case on ring gear.
5. Apply locking agent [Locktite (stud lock) or equivalent] to ring gear bolts, and install them.
Tighten bolts in a criss-cross fashion, lightly tapping bolt head
with a hammer.
6. Press-fit side bearing inner cones on differential case with Tool. Tool number:q
AST33230000
q
BST33061000
SPD656
SPD643
SPD746
PD353
ASSEMBLY (R180A)
PD-29
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