Dongfeng EQ1030T47D-820. Manual - part 7

 

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Dongfeng EQ1030T47D-820. Manual - part 7

 

 

Transmission

MT

TOC

Technical Performance Overview

.......................................................... MT-1

Service and Maintenance Notes for Transmission

............................. MT-1

Trouble and Troubleshooting

.................................................................. MT-1

Disassembling Procedures and Notes for Transmission Assembly

MT-2

Check and Repair

.................................................................................... MT-11

Reassembling Procedures and Notes for Transmission Assembly

MT-13

 

Transmission

MT-1

Transmission

Technical Performance Overview

Structure pattern

The 17G1A8-25 transmission is a mechanically manual transmission with 5 forward speeds and 1 reverse

speed. All the forward speeds are synchromeshed. 5th speed is overdrive gear. All of them apply skew cylindrical
gear engagement and the gear shifting is smooth.

Gear ratio

Odometer ratio:14/4.

lubricating oil

Brand: Manual transmission oil LAN-1 85W/90 or engine oil SAE 5W-30.

Oil volume: 2.7L

Service and Maintenance Notes for Transmission

1.Add lubricating oil as specified before mounting the transmission on the vehicle.

2.During shifting operation, depress the clutch pedal to the bottom. Before shifting into the reverse speed, stop the
vehicle completely.

3.When crossing a river or operating in mud, prevent water form entering into the transmission. Otherwise, oil
must be replaced.

4.The Service and maintenance of transmission shall follow the service and maintenance instructions for light-
duty vehicles. Replace the lubricating oil of transmission periodically. When replacing the oil, loosen the oil drain
plug at the lower part of transmission housing. After draining the oil in the housing, tighten the oil drain plug. Fill
the lubricating oil into the transmission through the filling  plug port on transmission shifting cover until it
reaches the lower edge of filler port.

Trouble and Troubleshooting 

1st speed

2nd speed

3rd speed

4th speed

5th speed

Reverse speed

5.016

2.672

1.585

1.000

0.77

4.783

Trouble

Phenomenon

Probable case

Judgement &Trouble shooting

Disengagement

1.The transmission 
shifts into neutral 
automatically during 
driving.

1.Wear of fork shaft circular groove 
and interlock pin, plastic deforma-
tion of lock ball spring.
2.Wear of fork working surface.
3.Wear of connecting cone for syn-
chronizer toothed ring and gear 
sleeve.
4.Axial looseness of gear.

1. Check the operating system to see whether 
the shifter rock arm of transmission is pushed 
in position, or dismount the transmission cover 
and push the fork by hand to engage the gear, 
check the engagement condition.
2. If not completely engaged,check the fork for 
deformation or overwear of working suface.
3. If the gear sleeve is completely engaged, 
check the gear sleeve and the back taper part of 
connecting tooth for wear.
4. If the clearance is too large when stirring the 
fork, check the fork shaft groove to see whether 
the locating spring is worn or faulty.
5. Check the 2nd shaft nut of tightening flange 
for looseness, if so, the axial position of 2nd 
shaft gear will change.

Transmission

MT-2

Disassembling Procedures and Notes for Transmission Assembly

Disassembling procedures of transmission from the vehicle

Disassembling sequence:

1.Operating flexible shaft

2.Odometer driveing flexible shaft

3.Drive shaft

4.Parking brake assembly

5.Starting motor

6.Transmission assembly

The gear couldn't 
be engaged prop-
erly.

1.Without the failure  
of clutch,shifting is 
difficult with serious 
pound or disengage-
ment at some gear  is 
hard.

1.Severe wear of interlock pin.
2.The fork head of internal speed 
selective rocker arm is sevrely worn 
or damaged, or separate from shifter 
small rocker arm groove.

1.Check the faulty area and remove the failure.

Noise

1.Regular pound
2.Even noise.

1.Some individual gear and tooth is 
broken.
2.Gear clearance is increased or gear 
is damaged.
3.Bearing is worn.
4.Lubricating oil is not sufficient.

1.Disassemble,inspect, clean or replace dam-
aged gear or bearing.
2.Replace or add oil.

Trouble

Phenomenon

Probable case

Judgement &Trouble shooting

Transmission

MT-3

Disassembling sequence and notes for transmission 

Disassembling sequence:

1.Clutch release bearing assembly

2.Clutch release fork shaft and release fork arm assembly

3.Clutch case connecting bolt, 9.8 grade

4.Clutch case

5.2nd shaft nut

6.Odometer flexible shaft sleeve sets

7.Connecting bolt, 9.8 grade

8.Rear cover

9.Odometer drive gear

10.Distance sleeve

11.Connecting bolt, 9.8 grade

12.Cover assembly

 

 

 

 

 

 

 

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