How to Use and Maintain the HOWO Range of Internal Combustion Tractor Interior Cab Devices?

2022-08-05

Use and Maintenance of Principal Assembly

2022-08-12

How to Perform Vehicle Maintenance and Appendixes

Maintenance category

According to different uses and service conditions of the vehicle, as well as the expected annual traveling mileage, the vehicle maintenance system is divided into three classes:

Class I: The service condition is poor (cold or hot climate, high dust content, short-distance transportation, off-road use) or the annual vehicle traveling mileage is less than 20,000km.
Class II: Short, medium-distance transportation, the annual vehicle traveling mileage is less than 60,000km.
Class III: Long-distance transportation, the annual vehicle traveling mileage is more than 60,000km.

Interval mileage of routine inspection and maintenance

Table of interval mileage of routine vehicle inspection and maintenance under the various serious conditions (as shown in Table 1) Unit: 1,000km

Class II mainte nance	Routi ne inspe ction	Class I mainte nance	Routi ne inspe ction	Class III mainte nance	Routi ne inspe ction	Class I mainte nance	Routi ne inspe ction	Class II mainte nance	Routi ne inspe ction	Class I mainte nance	Routi ne inspe ction	Class IV mainte nance
20	25	30	35	40	45	50	55	60	65	70	75	80
100	105	110	115	120	125	130	135	140	145	150	155	160
180	185	190	195	200	205	210	215	220	225	230	235	240
260	265	270	275	280	285	290	295	300	305	310	315	320
40	50	60	70	80	90	100	110	120	130	140	150	160
200	210	220	230	240	250	260	270	280	290	300	310	320
360	370	380	390	400	410	420	430	440	450	460	470	480
520	530	540	550	560	570	580	590	600	610	620	630	640
40	50	60	70	80	90	100	110	120	130	140	150	160
200	210	220	230	240	250	260	270	280	290	300	310	320
360	370	380	390	400	410	420	430	440	450	460	470	480
520	530	540	550	560	570	580	590	600	610	620	630	640

Daily Vehicle Maintenance Items

Check the parking brake and foot brake.
Check the lighting and the service conditions (engine oil pressure, air reservoir pressure, air filter maintenance indicator light, charging indicator light, etc.) of signal system and all kinds of indicator lights.
Check the tractor tire pressure and condition.4 Check the engine oil, transmission hydraulic oil, cooling liquid and fuel level.
Check the steering hydraulic oil level, temperature.
Check the steering hydraulic oil temperature.
Check whether the tractor and trailer connecting device is in normal condition.

Table of Vehicle Maintenance Items Of All Classes

Engine

Initial inspection

Routine inspection

Class I
maintenance

Class II
maintenance

Class III
maintenance

Class IV
maintenance

Replace the engine oil (at least once every year) ※ ※ ※ ※ ※

Replace the filtering element of oil filter ※ Every time replace the engine oil

Check and adjust the valve clearance※ ※ ※ ※※

Check the opening pressure of oil nozzle ※

Clean the rough filter of fuel pump ※ ※ ※

Replace the filtering element of fuel filter※ ※ ※※※※

Check the cooling liquid volume and fill up ※ ※ ※ ※ ※ ※

Replace the cooling liquid Every 24 months

Fasten the cooling pipe clamp ※

Fasten the inlet pipe hose and flange connection ※ ※ ※ ※ ※

Check the air filter blocking alarm switch ※ ※ ※ ※

Clean the dust cup of air filter ※ ※ ※ ※ ※

Clean the main filtering element of air filter When the indicator light is on

Replace the main filtering element of air filter When the main filtering element is damaged Replace the safety filtering element of air filter After cleaning the main filtering element for 5 times Check and fasten the V-belt ※ ※ ※ ※ ※ ※

Check the booster bearing clearance ※ ※

Check the fuel injection pump ※

Adjust the idling speed ※

Check the connection and fixation of intercooler inlet pipe ※ ※ ※ ※ ※ ※

Transmission Please refer to the transmission accompanied data for inspection and adjustment of transmission part
Check the transmission hydraulic oil level ※ ※ ※

Replace the transmission lubricating oil (at least once every year) ※ ※ ※ ※

Check the connection and fixation of oil pipe from transmission to cooler ※ ※ ※ ※
Check the transmission oil thermometer operating condition ※ ※ ※ ※
Check the throttle sensor operating condition ※ ※ ※
Check the operating condition of the transmission fault indicator light ※ ※ ※ ※ ※
Transmission shaft
Refasten the transmission shaft bolt Retighten the transmission shaft bolt when it initially travels 1,200km, and after that, retighten the transmission shaft bolt for every traveling of 3,000km.
Axle
Clean the ventilation device ※ ※ ※ ※
Check and adjust the hub bearing clearance Carry on during the first Class-2 maintenance Check and adjust the bearing clearance Carry on during the first Class-2 maintenance Replace the hub lubricating grease ※ ※
Cab
Check the wiper action ※ ※ ※ ※ ※ ※
Check oil level of the cab flip oil pump ※ ※ ※
Check the lifting cylinder installation condition ※ ※ ※ ※ ※ Check the operating condition of hydraulic lock and damper ※ ※ ※ Check the service condition of backdoor lock ※ ※ ※
Check the condition of front flip points ※ ※ ※

Chassis	Initial inspection	Routine inspection	Class I maintenance	Class II maintenance	Class III maintenance	Class IV maintenance
Check the fixation of front axle damper ※ ※ ※ ※ ※
Check and adjust the clearance of the steel plate spring side baffle ※ ※ ※ Fasten the front, rear steel plate spring U-shape bolt and bracket ※ ※ ※ ※ Check the tire pressure ※ ※
Check the fixation of traction gear ※ ※ ※ ※ ※ Check the fixation of wheel nut ※ ※ ※ ※ ※ Check the fixation of battery, air reservoir ※ ※ ※ Check the fixation of fuel tank ※ ※ ※ ※ Check the fixation of fender board ※ ※ ※ ※
Brake system
Drain water from the air reservoir ※ ※ ※ ※ ※ ※
Check the pressure system tightness (barometer inspection) ※ ※ ※ ※ ※ Clean the filtering screen of pressure regulating valve of the dryer ※ ※ ※ Check the thickness of brake friction disc, and adjust the brake clearance ※ ※ ※ Clean the wheel brake ※ ※
Check the easily abraded part of brake pipeline and hose ※ ※ ※ ※
Check the function of brake chamber ※ ※ ※ ※
Check the function of foot brake, hand brake and exhaust brake (carry on during test run) ※ ※ ※ ※ ※
Electrical	Initial inspection	Routine inspection	Class I maintenance	Class II maintenance	Class III maintenance	Class IV maintenance
Check the operation condition of the electrical system (signal light, headlight, width light, wiper, heating and ventilation device) of tractor and trailer ※ ※※※※※

Check the liquid level and proportion of battery electrolyte as well as the voltage of each battery cell ※※ ※ ※ ※
Check the fixation of battery terminal, and apply lubricating grease on the electrode ※ ※ ※ ※ ※
Check the correctness of electronic tachometer speed ※ ※ ※ ※ ※ ※
Check the correctness of speedometer speed ※ ※ ※ ※ ※ ※
Steering system	Initial inspection	Routine inspection	Class I maintenance	Class II maintenance	Class III maintenance	Class IV maintenance
Check and adjust the positioning of front wheel ※
Check the oil level height of steering oil tank ※ ※ ※ ※ ※
Replace the oil filer of steering oil tank ※ ※
Check the connection of steering oil pipe ※
Check the fixation of steering oil pipe ※
Check the function of steering system ※ ※
Saddle lifting system	Initial inspection	Routine inspection	Class I maintenance	Class II maintenance	Class III maintenance	Class IV maintenance
Check the leakage condition of hydraulic pipe connector Once every day Check the leakage condition of hydraulic cylinder Twice every week
Check or replace the gooseneck front supporting pad Once every half a year Check the leakage condition of control unit bank Twice every week

Carry on the anti-rust state inspection to the cab for every 12 months, and if necessary, carry on the anti-rust supplementing treatment.

Assembly oil-changing interval mileage

Category	Engine	Transmission	Rear axle	Steering system	Cab lifting system	Remarks
Initial inspection	※	※	※	※	※	The initial inspection is after the engine operating reaches 100h
Routine inspection	※
Class I maintenance	※
Class II maintenance	※	※	※	※	※
Class III maintenance	※	※	※	※	※
Class IV maintenance	※	※	※	※	※

Lubricating grease lubrication points

No	Lubrication part	Plac es	Usage	Period	Remarks
1	Engine water pump	1	120g	Once every 400h
2	Steering master pin	2	As needed	Once every 400h
3	Cab damper	3	As needed	Once every month
4	Cab hydraulic lock	1	As needed	Once every month
5	Cab flip shaft	2	As needed	Once every month
6	Front axle brake arm	2	As needed	Once every 400h
7	Front axle brake camshaft	2	As needed	Once every 400h
8	Drive axle brake camshaft	2	As needed	Once every 400h
9	Cab door hinge	4	As needed	Once every half a year
10	Front suspension pin shaft	6	As needed	At least once every month
11	Transmission shaft	3	As needed	Once every month
12	Front suspension damper	2	As needed	At least once every week
13	Hub	Each	600g	At least once every year
14	Traction seat junction surface	1	As needed		Contact surface fully applied
15	Swing arm rotating point	2	As needed
16	Cast steel traction seat rotating shaft	2	As needed
17	Traction seat lifting cylinder	4	As needed

1. Lubrication part, usage, period

h: Engine motorcycle calculated in hour / hour

Notes: After the vehicle cleaning, all lubrication points shall be refilled with lubricating grease.

2.Lubrication point distribution diagram

2.1 4×2 model lubrication point distribution diagram

Braking schematic diagram

1. Barometer

2. Brake master valve

3. Air horn

4. Push button valve

5. Hand brake valve

6. Front axle brake chamber

7. Air compressor

8. Main intake pipe

9. Spiral pipe

10. Trailer connector

11. Fuel cut-off cylinder

12. Air reservoir

13. Traction seat unlocking cylinder

14. Dual-chamber brake
chamber

15. Hand brake relay valve

16. Air reservoir

17. Foot brake relay valve

18. Air reservoir

19. Four circuit protection valve

20. Dryer

21.Butterfly valve switch cylinder

22. Trailer brake valve

23. Shut-off valve

Steel plate spring specifications

Model	Drive type	Position	Specification (pieces × thickness × width) mm	Remarks
Riveted frame	4×2	Front	4×22×90
	4×2	Rear	(9×18×100) +(6×16×100)
	6X4	Front	9×16×90
	6X4	Rear	12×22×90	Main spring of 4 pieces
Welded frame	4×2	Front	9×13×90
	4×2	Rear	Rigid suspension
	6X4	Front	9×13×88
	6X4	Rear	Rigid suspension
	Material	50CrVA		Generally used for all models

Service data of commonly used vehicles

Assembly		Oil product		Designation	Capacity
Fuel tank		Diesel	Condensation point in summer<0°C	GB252 top-grade No. 0 light diesel	230L
			Condensation point in winter<-20°C	GB252 top-grade – No. 20 light diesel
Cooling system	WD(T)615	Cooling liquid		Heavy-duty four-season lasting anti-freezing solution	40L
	MC(T)07			-35℃ working solution, I type Q/ZZ21007(BASF G48-24-35℃)	25-30L
Transmission	ZF S6-120	Heavy-duty vehicle gear oil		85W/90 GL-5	11L
	Allison	Allison transmission special oil		TranSyndTM	27L
	Shuangte	Shuangte transmission special transmission fluid		Dexron IIIH	28L
Steering system	Mechanical steering	Steering fluid		ATFⅢ automatic steering fluid	5L
	Fully hydraulic steering			46＃ anti-wear hydraulic oil	20L
Saddle lifting system		Hydraulic oil		46＃ anti-wear hydraulic oil	40L
Cab flip mechanism		Hydraulic oil		No. 10 aviation hydraulic oil	0．4L
Clutch		Brake fluid		DOT3	About 1L
Drive axle	Main reducer	Heavy-duty vehicle gear oil		85W/140 GL-5	6.3L
	Wheel reducer	Heavy-duty vehicle gear oil		85W/140 GL-5	2.4L (each side)
PR70 power take-off		Heavy-duty vehicle gear oil		85W/140 GL-5	1.5L

Table of tire pressure parameters

Model	Single tire (KPa)	Double tire (KPa)
11.00-20 (Level-18)	910	840
12.00-20 (Level-18)	810	740
12.00-24 (Level-18)	810	740
11.00R20 (Level-18)	930
12.00R20 (Level-18)	830
12.00R24 (Level-18)	830
11R22.5 (Level-16)	830
12R22.5 (Level-16)	830
315/80R22.5 (Level-18)	830
295/80R22.5 (Level-16)	830
425/65R22.5 (Level-18)	760

Table of wheel parameters

Model	8.00V-20	8.5-20	8.5-24	22.5×8.25	22.5×9.00	22.5×12.25
Rim type	Two-piece type	Two-piece type	Two-piece type	One-piece type	One-piece type	One-piece type
Tire specification	11.00-20/ 11.00R20	12.00-20/ 12.00R20	12.00-24/ 12.00R24	11R22.5	12R22.5 315/80R22.5 295/80R22.5	425/65R22.5

Main structure description

Engine: Special engine of Sino Truck.
Front axle: Fist-type I-shape special rigid front axle, drum brake.
Rear axle: Steyr punching reinforced center, wheel rim two-stage reduction rear axle, total speed ratio of 10.77.
Suspension: The front suspension of riveted frame model is a vertical steel plate spring belt drum-type damper, and the rear suspension is a primary, secondary steel plate spring suspension. The front suspension of welded frame model is a vertical steel plate spring belt drum-type damper, and the rear is a rigid suspension.
Steering system: The welded frame model is mechanical steering, and the diameter of steering wheel is 420mm.
Clutch: Single-piece dry type, hydraulic gas control type, 420, it is a periphery mounted spiral spring.
Brake system: WABCO brake system, it adopts the Germany’s VOSS quick connector.
Electrical equipment: Single-wire system, 24V, negative earth; 2×12V/165Ah battery, headlight, left, right front turning light, front fog light, width light, brake, light, back-up light, interior light, reversing light, combination instrument, transmission oil thermometer (automatic transmission accessory), transmission fault indicator light (automatic transmission accessory), reserved 24V wireless terminal equipment spare power cord (such as connection of the attached transformer, variable pressure of 12V), 24V power supply socket.
Cab: The cab is a skeleton covering structure, and adopts the VDO electrical system of Sino Truck.