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Sany SRT55D Off-Highway Truck. Safety, Operation and Maintenance Manual (2014) - page 4

Controls and Operating

3.12 Steering

The steering wheel position can be adjusted

as required for the most convenient operating

position. To adjust, pull out adjustment lock

and tilt steering wheel up or down as desired;

release lever to lock adjustment.

The steering system provides full-time

hydraulic power with a continuous-running

pump and a pressurized accumulator. The

accumulator helps maintain a constant flow

of hydraulic power to operate the steering

Fig.3-14

cylinders (Fig.3-14, 3-15).

To steer the front wheels, rotate the steering

wheel in the desired direction to the required

radius of turn. The front wheels will turn only

as the steering wheel is turned and at a rate of

turning directly proportional to steering wheel

speed. The front wheels will stop and hold

position when the steering wheel is stopped.

To return the front wheels to the straight ahead

position or to the opposite direction, turn the

steering wheel in the opposite direction.

warning

In the event of loss of steering pump

output pressure, a fully-pressurize

Fig.3-15

accumulator provides a maximum

of two lock to lock turns of the front

wheels. A red warning light on the

instrument panel illuminates and a

buzzer sounds when steering pressure

falls below 11.5MPa (1660 pound/

in²). If this warning light illuminates,

indicating a loss of steering power, the

machine must be stopped immediately

and no further operation attempted

until the fault is corrected. The

accumulator slowly bleeds down after

engine shut-off to prevent accidental

steering. However, accumulator

3-23

Controls and Operating

warning

Before any welding is done on a

machine equipped with a CEC shift

system, disconnect battery equalizer

ground cables, battery cables from

terminal posts (ground cable first),

battery equalizer positive cables

and electrical connections at the

ECU to avoid damage to electrical

components. Turn off ignition key

switch to isolate the batteries before

disconnecting any components.

The standard procedure for raising the

body must still be adhered to.

3

P

7

6

5

2

4

1

P

！

！

9

8

Fig.3-16

1.Electronic Control Unit (ECU)

6. Stalling Detection Switch

2.Control Box

7.Idling Adjustment Switch

3.Gear Shift Selector

8.Transmission overspeed indicator

4.Mode Selection Switch

9. Transmission fault indicator

5.Diagnosis switch

3-26

Controls and Operating

3.13.2 Introduction and operation

(1) Electronic Control Unit (ECU) - The ECU

contains an electronic microcomputer.It

receives information in the form of electronic

signals from switches and sensors, processes

the information, and sends electronic signals

to the appropriate solenoids which control the

transmission.

(2) Control Box -- Contains fuses \ relays and

ECU.

(3) Gear Shift Selector -- The shift selector is

a remote mounted lever type. The gear shift

selector is connected to the ECU by a wiring

harness. The shift lever has 5 forward ranges

and 2 reverse ranges, as well as a neutral

position.

The shift selector has a single digit LED

4

2

display, that during normal operation will

MODE

1

3

display the gear selected. Diagnostic

information can be displayed on the single

digit LED display by pressing the diagnostic

2

display button. There is a hold override button

1

that must be pressed when shifting between R,

N and D. The hold override button is released

when desired selector position is reached. The

selector lever can move freely between D and

the number ranges without pressing the hold

Fig.3-17

override button. (Refer to fig.3-17)

warning

Do not allow the vehicle to coast in

Neutral. This practice can result in

severe transmission damage.

The transmission upshifts and downshifts

automatically between first range and the

highest range selected on the range selector

in direct response to throttle position, engine

speed and transmission output speed.

When Reverse is selected the reverse alarm

sounds and the reverse light illuminates at

3-27

Controls and Operating

the mode light (4).

4

3.13.5 Clearing diagnostic codes

2

MODE

1

To clear active codes, press and hold mode

3

button (3) for 3 to 5 seconds.

To clear inactive codes, press and hold mode

2

button (3) for 8 to 10 seconds.

1

To exit diagnostic mode, press diagnostic

button (1). Refer to table for diagnostic code

description.

Fig.3-18

3.13.6 Diagnostic codes

Check

Main

Sub

Inhibited Operation

Description

Trans

code

Code

Description

Light

12

ECU input voltage, low

Yes

DNS

13

23

ECU input voltage, high

Yes

DNS

12

Throttle position sensor, failed low

Yes

Use throttle default values

21

23

Throttle position sensor, failed high

Yes

Use throttle default values

Engine speed sensor reasonableness

14

Yes

Use default engine speed

test

Turbine speed sensor reasonableness

22

15

Yes

DNS, lock in current range

test

Output speed sensor reasonableness

16

Yes

DNS, lock in current range

test

Hold in last valid direction. May

12

Primary shift selector or RSI link fault

Yes

cause “cateye” display

13

Primary shift selector mode function fault

No

Mode change not permitted

Secondary shift selector or RSI link

Hold in last valid direction. May

23

14

Yes

fault

cause “cateye” display

Secondary shift selector mode

15

No

Mode change not permitted

function fault

16

Shift Selector display line fault

Yes

None. May cause “cateye” display

3-33

12

Sump fluid temperature, cold

Yes

DNS, lock-to-range

24

No upshifts above a calibration

23

Sump fluid temperature, hot

Yes

range

Output speed sensor, detected at 0 output

11

Yes

DNS, lock in current range (1st)

rpm, 1st

Output speed sensor, detected at 0 output

22

Yes

DNS, lock in current range (2nd)

rpm, 2nd

Output speed sensor, detected at 0 output

33

Yes

DNS, lock in current range (3rd)

rpm, 3rd

Output speed sensor, detected at 0 output

44

Yes

DNS, lock in current range (4th)

rpm, 4th

25

Output speed sensor, detected at 0 output

55

Yes

DNS, lock in current range (5th)

rpm, 5th

Output speed sensor, detected at 0 output

66

Yes

DNS, lock in current range (6th)

rpm, 6th

Output speed sensor, detected at 0 output

77

Yes

DNS, lock in current range (7th)

rpm, 7th

Output speed sensor, detected at 0 output

88

Yes

DNS, lock in current range (8th)

rpm, 8th

26

00

Throttle source not detected

No

Use throttle default values

12

Sump fluid temperature sensor failed low

Yes

Use default value of 93°C (200°F)

33

23

Sump fluid temperature sensor failed high

Yes

Use default value of 93°C (200°F)

Factory calibration compatibility number

12

Yes

DNS, SOL OFF

wrong

13

Factory calibration fault

Yes

DNS, SOL OFF

Use previous location, or factory

14

Power off fault

Yes

34

calibration

Use previous location, or clear

15

Diagnostic queue fault

Yes

diagnostic queue

16

Real time fault

Yes

DNS, SOL OFF

17

Customer modifiable constants fault

Yes

DNS, SOL OFF

Power interruption (code set after power

None (hydraulic default during

00

No

35

restored)

interruption)

16

Real time write interruption

Yes

DNS, SOL OFF

36

00

Hardware/software not compatible

Yes

DNS, SOL OFF

3-34

12

General solenoid failure - F

Yes

DNS

13

General solenoid failure - K

Yes

DNS, Inhibit lockup

14

FGeneral solenoid failure - B

Yes

DNS, Inhibit Reverse

15

General solenoid failure - G

Yes

DNS

16

General solenoid failure - E

Yes

DNS

45

21

General solenoid failure - H/J

Yes

Turn off trim boost J, DNS H

22

General solenoid failure - A

Yes

No action taken

23

General solenoid failure - D

Yes

DNS

24

General solenoid failure - I

Yes

No action taken

26

General solenoid failure - C

Yes

DNS

21

Hi side overcurrent, H/J solenoid

Yes

Turn off H/J solenoid, DNS

26

Hi side overcurrent, C, D, E solenoid circuit

Yes

Turn off C, D, E solenoids

46

DNS. Turn off A, B, F, G, I, K

27

Hi side overcurrent, A, B, F, G, I, K

Yes

solenoids

11

Range verification ratio test, 1st

Yes

DNS

22

Range verification ratio test, 2nd

Yes

DNS

33

Range verification ratio test, 3rd

Yes

DNS

44

Range verification ratio test, 4th

Yes

DNS

56

55

Range verification ratio test, 5th

Yes

DNS

66

Range verification ratio test, 6th

On

DNS

77

Range verification ratio test, 7th or R1

Yes

DNS

88

Range verification ratio test, 8th or R2

Yes

DNS

65

00

Engine rating too high

Yes

DNS, Lock-in-neutral

66

00

Serial communications interface fault

No

Use default throttle values

27

ECU, inoperative A, B, F, G, I, K solenoid

Yes

DNS, SOL OFF

28

ECU, inoperative H/J solenoid

Yes

DNS, SOL OFF

29

ECU, inoperative C, D, E solenoid

Yes

DNS, SOL OFF

Reset ECU, shutdown ECU on 2nd

ECU, Computer Operating Properly (COP)

occurrence (power loss; hydraulic

33

Yes

fault

defaults). May cause “cateye”

display or all segments blank display

69

34

ECU, EEPROM, fault

Yes

DNS, SOL OFF

35

ECU, EEPROM, fault

Yes

Reset ECU

39

Communication chip addressing error

Yes

Use defaults for J1939 data

GPO 1-8 and reverse warning

42

SPI output failure

No

inoperable

43

SPI input failure

Yes

DNS, lock-in-range

3-35

Controls and Operating

3.14 Body Control

Operate the hoist lever(see Fig. 3-19) the left

of operator’s seat to raise or lower body. The

four operating positions of the lever from front

to rear are as follows :

HOIST -This position directs oil to extend the

body hoists and raise the body.

When released, the lever will be spring-

returned to the 'HOLD' position.

HOLD - Push the lever to this position while

the body is being raised and lowered to stop

movement and hold the body to the expected

height. The lever will be locked and kept at “

HOLD” position during releasing.

FLOAT - While the body drops via gravity, the

lever will be moved to and kept at this position

Fig.3-19

until the body will be operated again. The lever

shall be kept at “float” position during the truck

is in motion .

LOWER -This position provides hydraulic force

HOIST

to power-down the body. The body raised to

the highest position needs to be dropped with

hydraulic power, i.e., the lever shall be pushed

HOLD

to this position; when the body is dropped to

a certain height, it will drop via gravity. Then,

release lever and the lever will be moved to

FLOAT

the float position via spring which inside of the

valve (see Fig. 3-20).

LOWER

1. Hoist

Preparation:

(1) Run the engine in idling speed;

Fig.3-20

(2) Make sure the rear wheels are on the firm

level ground;

(3)Shift the transmission to Neutral and hold

the machine stationary by applying the brakes

with the Parking-Emergency brake button.

Lifting:

(1) Pull the lever backward to the “Raise”

position, hold the lever and accelerate engine

to raise body;

(2) Moves the raise lever to "hold" position

when the body is required to stay at a certain

3-36

Operating the Truck

Rear lamp assembly Check for leakage

REAR RIDE CYLINDERS

and normal working

WHEELS AND TYRES Check condition,

Check for debris leaks and

inflation, nuts and for damaged rims

damage. Check height

DIFFERENTIAL Check for leaks

DISC BRAKE ASSEMBLIES Check for leaks

BODY CYLINDERS Check for debris,

leaks and damage. Check lines for

FUEL TANK Check fuel level.

wear and leaks.

Ensure fuel tank is full.

Check that tank is securely mounted.

TRANSMISSION Check oil level.

Check for leaks

Hydraulic oil tank Check oil level.

Check for leaks

STEERING CYLINDERS Check for

debris, leaks and damage.

FRONT RIDE CYLINDERS

Check lines for wear and leaks

Check for debris, leaks and

damage. Check height

BRAKE ACCUMULATORS

Check for leaks.

ENGINE Check oil level.

Check liquid level of expan-

Check for leaks

sion water tank and leakage

Front lamp assembly Check

for damage and normal working

CAB, PLATFORM AND STEPS Check

for cleanliness. Check seat belts.

Fig. 4-1

4-2

Operating the Truck

4.2 Check Of Each Component

1. Engine

With the engine off, check oil level. The oil

level should be between the lower and upper

marks on the dipstick. Add oil if low (see Fig.

4-2).

Fig. 4-2

2. Fuel filters

Drain sediment and water from sump until fuel

runs clear (see Fig. 4-3).

Fig. 4-3

3.Radiator header tank

Check coolant level. Add if low. (see Fig. 4-4).

In subfreezing temperatures, be sure that the

coolant contains sufficient antifreeze.

WARNING

Press button in centre of cap to

bleed pressure before removing cap

Fig. 4-4

completely. Fill to bottom of filler neck.

4-3

Operating the Truck

4. Air Cleaner vacuator valve(s)

Check for proper operation. Clean if Required

(see Fig. 4-5).

Fig. 4-5

5. Tyres

Carefully inspect all tyres for cuts, bruises,

or other damage and proper inflation for the

loads to be carried. Inflate all tyres to the

recommended pressure while cold (see Fig.

4-6).

Fig. 4-6

！

6. Fuel level gauge

Check fuel level. Tank should be filled at end

of each shift to prevent condensation(see Fig

4-7).

Fuel gauge

Fig 4.7

4-4

Operating the Truck

7. Body and disc brake cooling tank - cold

oil level

The bottom sight gauge should show full. Add

fluid, if low (see Fig. 4-8)

steering oil pointer

8. Steering and braking tank - cold oil level

lifting oil pointer

up oil pointer

up oil pointer

With the engine off, turn the steering wheel

back and forth to dissipate any pressure in the

down oil pointer

down oil pointer

steering accumulator. Oil should be showing in

the middle sight gauge. Add fluid, if low (see

Fig. 4-8).

Fig. 4-8

9. Transmission - cold oil level

This check is made only to determine if the

transmission contains sufficient oil for safe

starting. Make sure there is some oil showing

Full

on the sight gauge before starting the engine.

1/2 Oil level

Add oil if low (see Fig. 4-10).

Fig. 4-9

4-5

Operating the Truck

10. Seat and seat belts

Adjust the seat position and lap belt as

required to allow complete machine control

Safety belt

at all times with minimum fatigue. Make sure

the seat belt does not restrict movement for

proper machine operation (see Fig. 4-10 and

4-11).

Fig. 4-10

Safety belt

Fig. 4-11

4.3 Engine Operation

Note: The electronic controlled engine will

override the electronic foot pedal position

until the engine is warmed up to the correct

operating temperature. The engine MUST

be started with foot 'OFF' the electronic foot

pedal.

Do not place engine under FULL LOAD at

FULL SPEED IMMEDIATELY after starting.

4-6

Operating the Truck

4.4 Start the Engine

Attention to the warning lights and instruments

when starting the engine, and operating,

will help the operator monitor the machine

systems and components.

1. Make sure the park brake control is in the

P

'PARK' position.(see Fig 4-12).

parking brake switch

Fig 4.12

2.Make sure the body control lever is in the

'FLOAT' position.(see Fig. 4-13).

Fig. 4-13

3. Make sure the transmission shift selector is

in the 'NEUTRAL' position.(see Fig .4-14).

2

MODE

1

Fig. 4-14

4. Insert switch key and turn clockwise to

position 'I'.(see Fig. 4-15).

Fig. 4-15

4-8

Operating the Truck

5. Check the instrument panel; the engine

“maintenance”, “warning”, and “stop” indicators

1

2

3

shall flash for several seconds and then

P

！

extinguish; the “Alternator Charging” and

！

“transmission fault” indicators shall be

4

5

constantly on; the Power View display

instrument does not indicate warning (see

Fig 4.16

Fig4-16).

6. Press horn control to sound horn. (see Fig.

4-17).

Caution:Always sound horn before starting

engine or operating anycontrol.

Fig. 4-17

7. Turn key further clockwise against spring

pressure to position 'II' to crank the engine.

Release the key as soon asthe engine starts

firing.

Caution: Never crank the engine more than

30 seconds continuously. Allowstarter(s) at

least 2 minutes cooling time between cranking

periods to avoid overheating. (see Fig.4-18).

Fig. 4-18

8.Check the engine oil pressure gauge. Within

10 to 15 seconds at engine idle,the gauge

P

needle should rise into the yellow zone. If the

！

needle does not rise within 15 seconds, shut

off the engine and do not operate until the fault

is identified and corrected. (see Fig 4-19).

9. Observe the engine water temperature

Engine pressure

gauge. After a few minutes running time at

gauge

moderate load and varying speed, the gauge

needle should be in the green zone. If the

needle moves into the red zone, the engine

Engine water temperature gauge

is over heated and should be shut down

Fig 4.19

immediately.(see Fig 4-19).

4-9

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