Dongfeng DFA1063DJ10 (14)-301/303. Manual - part 14

 

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Dongfeng DFA1063DJ10 (14)-301/303. Manual - part 14

 

 

Steering System

ST-4

Turning lock

Remove the fixed bolt of the clip.

Tighten the fixed bolt.
Note:
Take a look if the installing position of the steering lock is correct.

Adjusting mechanism

After assembling the steering shaft adjusting mechanism, check its

moving condition.

Front, rear                             ± 6°

Up, down                               L3:        ± 15mm

Check

If the steering wheel can't be turned flexibly, please check the steering

column by the following steps and replace the corresponding wearing
parts.

Check the steering column bearing for any damage or wearness, and

lubricate the bearing with proper grease. Replace the total steering column
if necessary.

Check the steering column sleeve for distortion or damage, and

replace it if necessary.

Steering System

ST-5

Power Steering Hydraulic Pressure System

1.Power steering gear assembly
2.Elbow assembly, inlet oil
3.Upper bracket 
4.Elbow assembly, outlet oil, 
5.Bracket 
6.Clip

7.Clip
8.Oil pump
9.Bolt--joint of the oil pump
10.Joint--inlet oil tubing
11.Jacket
12.High pressure hose assembly

13.Hose
14.Hose--steering gear  to oil 
reservoir
15.Oil reservoir assembly, steering

Steering System

ST-6

Steering Gear

Basic parameter

Maintenance

1.After 2,500km, the new power steering gear need to replace its hydraulic pressure oil, and wash the filter in the

oil reservoir. Replace the hydraulic pressure oil and wash the filter ever 50,000km or every year after that.

2.Check the oil quantity every month to see whether it reduced, deteriorated or too much impurities. If there is any

badness, you have to refill or replace the oil immediately.

3.Check and keep the tire pressure accord with the requirement.

4.Procedure of replace or fill oil

(1)Support the front axle.

(2)Open the oil reservoir, screw down the oil outer bolt of the steering gear, drain off the remain oil in the oil

pump and the oil reservoir(idle the engine), and turn the steering wheel left and right to the limit for several times,
till there is not oil flowing out.

(3)Tighten the oil outer bolt (keep it clean and avoid dirt entered)

(4)Fill with new hydraulic pressure oil.

(5)Idle the engine, turn the steering wheel left and right to its limit for several times until there is no bubbles

appeared in the oil reservoir and the oil level stop dropping.

(6)Refill the oil reservoir to its maximum.

(7)Tighten the upper cover of the oil reservoir.

Basic parameter

M11-3411010

Appropriate maximum load of front axle (kg)

3500

Max. output torque (N.m)

2150

Max. oil pressure (MPa)

13

Recommended oil pump flow (L/min)

10

Drive ratio

18:1

Number of total turns

4.78

Pitman arm shaft turning angle

±

45°

Temperature range (°C)

-40~120

Diameter of the piston (mm)

80

Steering System

ST-7

Trouble Analysis

Trouble

Cause

Method

Bothway heavey steer-

ing

1.Oil level in steering gear is not suffi-
cient

Add oil to the upper mark

2..The connecting part between the oil 
outlet and the engine, and between the oil 
inlet of the steering oil pump and the 
engine, and between the oil pump and the 
engine sucked air.

Tighten oil pipe fitting or replace the seal-
ing part

3.Too small flow of the steering oil pump 
(flow control valve blocked)

Disassemble and wash the flow control 
vavle

4.Strainer screen of the oil reservoir 
damaged or blocked

Replace the filter cartridge and wash the 
oil suction pipeline between oil reservoir 
and oil pump

5.The movement between steering drive 
shaft and universal joint connecting with 
the steering gear is not flexible.

Move repeatedly until it becomes flexible, 
otherwise you have to replace the univer-
sal joint

6.Rotary valve blocked

Repair the steering gear

7.Improper oil pressure in the oil pump

Replace oil pump

8.Vehicle overload too much

Reduce load

One-way heavey steer-

ing

1.Tire pressure of one side isn't enough.

Inflating

2.Only one direction of the steering gear 
leak out too much.

Repair the steering gear

3.The rotary valve isn't in the nuetral 
position.
4.The fixed pressure of left or right can,t 
be set up.

Replace sealing part

Heavey steering when 

quickly turning bothway

1.The connecting part between the oil 
outlet of the steering oil reservoir and the 
engine, and between the oil inlet of the 
steering oil pump and the engine sucked 
air.
2.Too small flow capacity of the steering 
oil pump

Replace the steering oil pump

Too large free travel of 

the steering wheel

1.Steering wheel and steering shaft fit is 
loose

Tighten

2.Connecting part of the steering drive 
device loosed
3.Fixed bolt of the steering gear and its 
bracket loosed
4.Too big clearance between steering 
screw arbor and nut

Repair the steering gear

5.Leaf spring bolt loosed

Tighten

6.Steering universal joint locking bolt 
loosed

Tighten

7.Improper adjustment of the steering 
gear

Adjust side cover adjusting bolt

 

 

 

 

 

 

 

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