F300-TR-Transmission_and_Transfer-Part1
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PART 1 - PART 2 - PART 3 - PART 4 - PART 5 - PART 6 - PART 7 - PART 8 - PART 9 - PART 10
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DAIHATSU
TRANSMISSION & TRANSFER
TRANSFER POWER TRANSMITTING
MECHANISM (PART TIME)
TRANSFER SHIFI' & MECHANISM
TRANSFER (FULL TIME)
CONSTRUCTION SHIFT & SELECT MECHANISM SWITCHING TRANSFER FROM 4WD
TO 2WD DURING TOWING
POWER TRANSMITFING ROUTE
SHIFT & SELECT MECHANISM
(during 2WD operation) LUBFHCATING MECHANISM
GEAR & TEETH NUMBER
SPECEFICATIONS
T/M & IDENTIFICATION MARKING
POSITION TRANSFER (PART TIME)
COMPONENTS
DISASSEMBLY OF TRANSFER OUTPUT
TR-18 TR-20
DISASSEIVI BLY OF TRANSFER
COUNTER GEAR INSPECTION
ASSEMBLY (T/F OUTPUT FRONT,
COUNTER GEAR and REAR)
INSTALLATION
REMOVAL. INSTALLATEON OF
SET BOLT (ONLY FOR FULL TIME) DISASSEMBLY OF SHIFI' &
SELECT SHAFT N0.
ASSEMBLY OF SHIFT &
SELECT SHAFT N0. 1 TRANSFER (FULL TIME)
COMPONENTS
REMOVAL
DISASSEMBLY OF DIFFERENTIAL
INSPECTION
ASSEMBLY OF DIFFERENTIAL ASSY
INSTALLATION
SERVICE SPECIFICATIONS TIGHTENING TORQUE
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TRANSMISQIQN & TRANSFER
TRANSFER (PART TIME) TRANSFER POWER TRANSMITTING MECHANISM
When the transfer shift lever is shifted into the 2H position, the power from the transmission output shaft is transmitted to the rear wheels through the transfer output rear shaft. Furthermore, when the transfer shift lever is shifted into the 4H position, the shift is made into the transfer front drive gear. Then, the power is transmitted to the transfer output front shaft through the transfer front drive chain, finally driving the front and rear wheels. When the transfer shift fever is placed in the Position, the shift is made into the transfer low speed input gear. Then, the power is transmitted in the following sequence; the transfer countergear, transfer output rear shaft, transfer front drive chain and transfer output front shaft. Finally, the power drives the front and rear wheels.
E a
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TRANSMISSION & TRANSFER
1. The transfer high & low shift fork shaft is pressed by a ball indicated in Fig. 1. Since this ball engagement is sc deep that the center of the ball nearly reaches the outer contour of the transfer high & low shift fork
/'éhaft as shown by in the figure beiow, the transfer high & low shift fork shaft iéin
Transfer from drive
_ Shift fork Shaq Transfer hrgh &
shift Iork shaft
cross
f SGC ION 11212;, / Transfer control Shan
cross-section
Fig.1
4H condition
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2. When the transfer control shaft is shifted from the 4H position tothe 2H position, the transfer front drive shift fork shaft alone moves to the right, for the transfer high & low shift fork shaft is locked bythe ball. If there is any difference in rotating torque between the front wheel and the rear wheel at this time, a wait mechanism (ie: Compression spring) functions owing to the resistance by a twisting torque between the front drive clutch hub and the front drive gear. As a resuit, the front drive shift fork is kept in the 4H condition. When the difference in rotating torque diminishes, the front drive shift fork is returned to the right by a spring tension, thus switching to the 2H condition.
Transfer front drive
Shiqfork Shan
I Transfer & low
00mDfeSS~0H shin mm Shan sprvng
Transfer control shaft
I 2H condition
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TRANSMISSION 81 TRANSFER
_ When the transfer control shaft is switched from the direction to the 41. direction, the transfer shift lever moves downward. Thus, the transfer fork shaft pin is erected almost vertically as shown in Fig. 2 belowinasmuch as the transfer fork shaft pin is secured to the transfer high & low shift fork shaft. the transfer fork shaft pin is erected almost vertically. Consequently, the transfer high & low shift fork shaft turns to the left, as shown in Fig. 1 below. Simultaneously the roller moves and fits into the groove ofthe
Transfer front dnve J I . Transfer contra! sh (ft fork L
Transfer fork shaft pin I I `
Shift position
Transfer high 8. low
Transier from drive Transfer lark ; shift fork ahah shaft pin
Fig.1 Fig.2
4H condition
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2. When the transfer control shaft is shifted to the direction. the transfer high & low shift fork shaft alone
moves to the right. thereby attaining the condition.
Transfer high & low shwft iork shaft
I
Transfer control shaft
11
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TRANSMISSION 8| TRANSFER
TRANSFER (Full-time) GENERAL A full-time 4WD vehiclehas been introduced in which a differential (center difterentiat) is provided on the transfer rear output shaft in the transfer. This center differential absorbs any difference' in rotation between the front wheels and the rear wheels which may occur while turning under the 4WD mode or which may be generated due to the difference in friction between the front tires and the rear tires.
A
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'rRANsM|ss|oN a TRANSFER
W
TRANSFER (For full-time 4WD vehicle) 1. Gear specifications
Unit Nomenclature J Gear Nomenclature *T I
Gear type | Number of
Number of teeth
1s 7
Diiferential side gear
Straight bevel gear
Sprocket
10
33
33
Straight bevel gear
Drive gear Spur gear
Driven gear
2. Speedometer gear specifications
7
Type oi engine
1 Number of driven gear teeth (ldentificaiion)
Power train system The switching between the free position and the center differential lock position is performed by means of the clutch sleeve which is slided in a lore-&-aft direction by the shift fork. Moreover, the clutch section employs a dog type. Consequently, the switching between the center differential lock position and the free position is performed only by means of the slide ofthe clutch sleeve.
Front 1
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7 TRANSMISSION 8: TRANSFER
Power transmitting route 1. When center differential is locked:
When the tranefer shift lever shifted into the “CENTER DIFF LOCK" position, the differential lock sleeve moves to the lock position Consequently, the differential case cover is combined with the transfer front drive hub. thereby eliminating the differential function of the center differential. As a result, the power from the transmission output shaft is distributed evenly to the front and rear wheels under any condition. (This condition is the same as the 4WD running period of the part-time vehicle.)
Differential C866 Transfer front drive hub
(Lock
Transmission / Chain Output shait //i
Difierential Iuck sleeve
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When center differential is free:
When the transfer shift lever is shifted into the "FULLT|ME" position, the power from the transmission output shaft is transmitted to the rear wheels in the same way as the center differential locked state. However, since the differential lack sleeve moves to the tree position the difterential case is dis- engaged irom the transfer front drive hub. As a result, the differential function of the center differential becomes operative.
Drfferential case 1 Transfer front drive hub 1
(Free)
Chain
TR-10
