14H and 16H Motor Graders Power Train Transmission and Transfer Gears Caterpillar


Transmission and Transfer Gears
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14H and 16H Motor Graders Power Train [RENR4174]
POWER TRAIN
GEAR GP
14H and 16H Motor Graders Power Train Transmission and Transfer Gears
1.1. Transmission Planetary
2.2. First Speed
3.2. Second Speed
4.2. Third Speed
5.2. Fourth Speed
6.2. Fifth Speed
7.2. Sixth Speed
8.2. Seventh Speed
9.2. Eighth Speed



Illustration 1g00930229

Transfer Gears

(1) Input gear

(2) Forward input gear

(3) Output gear

(4) Output gear

(5) Reverse input gear

(6) Idler gear

(7) Planetary input gear

The planetary transmission has eight forward and eight reverse speeds. The selection for speed and direction is done manually. The transmission is controlled hydraulically. The transmission is driven by a set of transfer gears which are turned directly by an adapter on the engine flywheel. The transfer gears have two turning clutches. One of the turning clutches is the forward clutch and the other turning clutch is the reverse clutch.

The adapter on the engine flywheel turns input gear (1). Input gear (1) turns against forward input gear (2). The movement turns reverse input gear (5). There is no flow of power if the direction clutches are not engaged. When the No. 1 forward clutch is engaged, output gear (3) turns against idler gear (6). This turns planetary input gear (7). Since the reverse clutch is not engaged, output gear (4) is free to turn with idler gear (6). When the No. 2 reverse clutch is engaged, the forward clutch is not engaged. Output gear (3) turns idler gear (6) which drives planetary input gear (7) in the opposite direction.

Transmission Planetary




Illustration 2g00930230

Planetary Transmission

(8) No. 3 and No. 4 carrier

(9) No. 3 clutch

(10) Planetary gear

(11) Housing for No. 3 clutch

(12) No. 4 clutch

(13) Housing for No. 4 clutch

(14) Planetary gear

(15) Housing for No. 5 clutch

(16) No. 5 clutch

(17) Housing for No. 6 clutch

(18) No. 6 clutch

(19) Housing for No. 7 clutch

(20) No. 7 clutch

(21) Housing

(22) Parking brake clutch

(23) No. 8 clutch

(24) Cage

(25) Flange

(26) Ring gear for parking brake

(27) Shaft

(28) Planetary gear

(29) Ring gear for No. 3 clutch

(30) Sun gear

(31) Ring gear

(32) No. 5 and No. 6 carrier

(33) Ring gear for No. 5 clutch

(34) Sun gear

(35) Planetary gear

(36) Ring gear for No. 6 clutch

(37) Sun gear

(38) Ring gear for No. 7 clutch

(39) Planetary gear

(40) No. 7 carrier

(41) Hub for No. 8 clutch

(42) Housing

The planetary transmission has five stationary clutches. The stationary clutches are the following clutches: No. 3 clutch, No 4 clutch, No. 5 clutch, No. 6 clutch and No. 7 clutch. The planetary transmission has one rotating clutch. The rotating clutch is the No. 8 clutch. The planetary transmission also has a stationary clutch for the parking brake. Two of the six planetary clutches and one of the direction clutch must be engaged for each speed.

Table 1
Gear     Speed Clutches     Forward Clutch     Reverse Clutch    
Neutral     3 & 8            
First     6 & 7     1     2    
Second     5 & 7     1     2    
Third     4 & 7     1     2    
Fourth     3 & 7     1     2    
Fifth     6 & 8     1     2    
Sixth     5 & 8     1     2    
Seventh     4 & 8     1     2    
Eighth     3 & 8     1     2    

First Speed




Illustration 3g00930232

(8) No. 3 and No. 4 carrier

(9) No. 3 clutch

(10) Planetary gear

(11) Housing for No. 3 clutch

(12) No. 4 clutch

(13) Housing for No. 4 clutch

(14) Planetary gear

(15) Housing for No. 5 clutch

(16) No. 5 clutch

(17) Housing for No. 6 clutch

(18) No. 6 clutch

(19) Housing for No. 7 clutch

(20) No. 7 clutch

(21) Housing

(22) Parking brake clutch

(23) No. 8 clutch

(24) Cage

(25) Flange

(26) Ring gear for parking brake

(27) Shaft

(28) Planetary gear

(29) Ring gear for No. 3 clutch

(30) Sun gear

(31) Ring gear

(32) No. 5 and No. 6 carrier

(33) Ring gear for No. 5 clutch

(34) Sun gear

(35) Planetary gear

(36) Ring gear for No. 6 clutch

(37) Sun gear

(38) Ring gear for No. 7 clutch

(39) Planetary gear

(40) No. 7 carrier

(41) Hub for No. 8 clutch

(42) Housing

Power is transfered to No. 1 clutch or to No. 2 clutch. Power is then transfered from the clutches into carrier (8). Planetary gears (10) are turned by carrier (8). The planetary gears are engaged with ring gear (31) for No. 4 clutch (12). The ring gear turns. The No. 4 clutch is not engaged but ring gear (31) is connected to carrier (32) by a spline. Since No. 6 clutch (18) is engaged, ring gear (36) is held. Planetary gears (35) force sun gear (37 ) to turn shaft (27) .

When sun gear (37) turns shaft (27), there is resistance to planetary gears (35). There is also resistance to carrier (32). Ring gear (31) is connected to carrier (32). Ring gear (31) is resisted by carrier (32). Planetary gears (10) force sun gear (30) to turn shaft (27). Power is divided between the sun gear (30) and ring gear (31) .

Shaft (27) turns planetary gears (39). No. 7 clutch (20) holds ring gear (38) and planetary gears (39) turn carrier (40). The No. 7 carrier is connected to ring gear (26). Ring gear (26) is connected to output flange (25). Power is sent to the differential.

Second Speed

Power is transfered to No. 1 clutch or to the No. 2 clutch. Power is then transfered from the engaged clutch to carrier (8). Sun gear (34) is connected to carrier (8) by a spline. Sun gear (34) turns the planetary gears (14). No. 5 clutch (16) holds ring gear (33). Planetary gears (14) force carrier (32) to turn. Carrier (32) is connected to the ring gear (31) by a spline. Ring gear (31) turns in the same direction as carrier (8) at a slower speed. The difference in speed between carrier (8) and ring gear (31) forces planetary gears (10) to turn sun gear (30). Sun gear (30) is connected to the shaft (27) .

Shaft (27) turns the planetary gears (39). No. 7 clutch (20) holds ring gear (38) and planetary gears (39) turn carrier (40). The No. 7 carrier is connected to ring gear (26). Ring gear (26) is connected to output flange (25). Power is sent to the differential.

Third Speed

Power is transfered to No. 1 clutch or to the No. 2 clutch. Power is then transfered from the clutches to carrier (8). No. 4 clutch (12) holds ring gear (31). Planetary gears (10) force sun gear (30) to turn shaft (27) .

Shaft (27) turns planetary gears (39). No. 7 clutch (20) holds ring gear (38). Planetary gears (39) force No. 7 carrier (40) to turn. The No. 7 carrier is connected to ring gear (26). Ring gear (26) is connected to output flange (25). Power is sent to the differential.

Fourth Speed




Illustration 4g00930234

Power flow in Fourth Gear Forward position

(8) No. 3 and No. 4 carrier

(9) No. 3 clutch

(10) Planetary gear

(11) Housing for No. 3 clutch

(12) No. 4 clutch

(13) Housing for No. 4 clutch

(14) Planetary gear

(15) Housing for No. 5 clutch

(16) No. 5 clutch

(17) Housing for No. 6 clutch

(18) No. 6 clutch

(19) Housing for No. 7 clutch

(20) No. 7 clutch

(21) Housing

(22) Parking brake clutch

(23) No. 8 clutch

(24) Cage

(25) Flange

(26) Ring gear for parking brake

(27) Shaft

(28) Planetary gear

(29) Ring gear for No. 3 clutch

(30) Sun gear

(31) Ring gear

(32) No. 5 and No. 6 carrier

(33) Ring gear for No. 5 clutch

(34) Sun gear

(35) Planetary gear

(36) Ring gear for No. 6 clutch

(37) Sun gear

(38) Ring gear for No. 7 clutch

(39) Planetary gear

(40) No. 7 carrier

(41) Hub for No. 8 clutch

(42) Housing

Power is transfered to No. 1 clutch or to the No. 2 clutch. Power is then transfered from the engaged clutch to carrier (8). No. 3 clutch (9) holds ring gear (29). Planetary gears (28) force shaft (27) to turn.

Shaft (27) turns planetary gears (39). No. 7 clutch (20) holds ring gear (38). Planetary gears (39) force No. 7 carrier (40) to turn. The No. 7 carrier is connected to ring gear (26). Ring gear (26) is connected to output flange (25). Power is sent to the differential.

Fifth Speed

Power is transfered to No. 1 clutch or to the No. 2 clutch. Power is then transfered from the engaged clutch to carrier (8). The planetary gears (10) turn ring gear (31). Ring gear (31) connects to carrier (32) by a spline. No. 6 clutch (18) holds ring gear (36). Planetary gears (35) force sun gear (37 ) to turn shaft (27).

When sun gear (37) turns shaft (27), there is resistance to planetary gears (35). There is also resistance to carrier (32). Ring gear (31) is connected to carrier (32). Ring gear (31) is resisted by carrier (32). Planetary gears (10) force sun gear (30) to turn shaft (27). Power is divided between sun gear (30) and ring gear (31) .

Shaft (27) turns hub (41). The No. 8 clutch forces ring gear (26) to turn with hub (41). Ring gear (26) is connected to output flange (25). Power is sent to the differential.

Sixth Speed

Power is transfered to No. 1 clutch or to the No. 2 clutch. Power is then transfered from the engaged clutch to carrier (8). Sun gear (34) is connected to carrier (8) by a spline. Sun gear (34) turns planetary gears (14). No. 5 clutch (16) holds ring gear (33). Planetary gears (14) force No. 5 and No. 6 carrier (32) to turn. Carrier (32) connects to ring gear (31) by a spline. Ring gear (31) turns in the same direction as carrier (8) but at a slower speed. The difference in speed between carrier (8) and ring gear (31) forces planetary gears (10) to turn sun gear (30). Sun gear (30) is connected to shaft (27) .

Shaft (27) turns hub (41). The No. 8 clutch forces ring gear (26) to turn with hub (41). Ring gear (26) is connected to output flange (25). Power is sent to the differential.

Seventh Speed

Power is transfered to No. 1 clutch or to the No. 2 clutch. Power is then transfered from the engaged clutch to carrier (8). No. 4 clutch (12) holds ring gear (31). Planetary gears (10) force sun gear (30) to turn shaft (27) .

Shaft (27) turns hub (41). No. 8 clutch (23) forces ring gear (26) to turn with hub (41). Ring gear (26) is connected to the output flange (25). Power is sent to the differential.

Eighth Speed




Illustration 5g00930235

Power Flow in Eighth Gear

(8) No. 3 and No. 4 carrier

(9) No. 3 clutch

(10) Planetary gear

(11) Housing for No. 3 clutch

(12) No. 4 clutch

(13) Housing for No. 4 clutch

(14) Planetary gear

(15) Housing for No. 5 clutch

(16) No. 5 clutch

(17) Housing for No. 6 clutch

(18) No. 6 clutch

(19) Housing for No. 7 clutch

(20) No. 7 clutch

(21) Housing

(22) Parking brake clutch

(23) No. 8 clutch

(24) Cage

(25) Flange

(26) Ring gear for parking brake

(27) Shaft

(28) Planetary gear

(29) Ring gear for No. 3 clutch

(30) Sun gear

(31) Ring gear

(32) No. 5 and No. 6 carrier

(33) Ring gear for No. 5 clutch

(34) Sun gear

(35) Planetary gear

(36) Ring gear for No. 6 clutch

(37) Sun gear

(38) Ring gear for No. 7 clutch

(39) Planetary gear

(40) No. 7 carrier

(41) Hub for No. 8 clutch

(42) Housing

Power is transfered to No. 1 clutch or to the No. 2 clutch. Power is then transfered from the engaged clutch to carrier (8). No. 3 clutch (9) holds ring gear (31). Planetary gears (28) force shaft (27) to turn.

Shaft (27) turns hub (41). No. 8 clutch (23) forces ring gear (26) to turn with hub (41). Ring gear (26) is connected to the output flange (25). Power is sent to the differential.

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