Dongfeng Primary school bus: Product Range Made in China (Auto-Che.com)

#201

Dongfeng DFA6720KX3B1 primary school bus

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6693K3AC	Passenger capacity:	24-44
Engine:	YC4FA130-30 / YC4F115-30	Wheelbase (mm):	3800
Displacement (cc):	2982 / 2659	Dimensions (mm):	7200 × 2260 × 2800/3035
Power (kW):	95 / 85	Gross weight (kg):	7450

#202

Dongfeng DFA6600KX3C1 primary school bus

Dongfeng DFA6600KX3C1 (batch #229)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6570K3AC	Passenger capacity:	24-30
Engine:	YC4F115-30 CY4102-D3A...	Wheelbase (mm):	3308
Displacement (cc):	2659 3856 3298 3660 3856...	Dimensions (mm):	6004 × 2260 × 2630/2830
Power (kW):	85 88 79 81 88 82 81...	Gross weight (kg):	5300

#203

Dongfeng EQ6660PCN31 (batch #229)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Nanchong Automobile Co., Ltd. (China)
Chassis:	EQ6580KSN30	Passenger capacity:	24-35
Engine:	NQ115N	Wheelbase (mm):	3300
Displacement (cc):	3759	Dimensions (mm):	6640 × 2280 × 2800/3000
Power (kW):	85	Gross weight (kg):	5830

#204

Dongfeng EQ6850ZD3G (batch #229)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Motor Co., Ltd. (China)
Chassis:	EQ6800KSD3G	Passenger capacity:	24-54, 24-60
Engine:	YC4E160-30 EQH160-30	Wheelbase (mm):	3900
Displacement (cc):	4260 4752	Dimensions (mm):	8460 × 2440 × 3000/3200
Power (kW):	118 118	Gross weight (kg):	10800

#205

Dongfeng EQ6730ZD3G (batch #229)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Motor Co., Ltd. (China)
Chassis:	EQ6690KSD3G1	Passenger capacity:	24-47
Engine:	CY4102-C3C YC4D130-30...	Wheelbase (mm):	3800
Displacement (cc):	3856 4214 5638 3857 3857...	Dimensions (mm):	7255 × 2300 × 2930/3100
Power (kW):	88 96 104.2 101 90 98 91	Gross weight (kg):	7250

#206

Dongfeng EQ6660PC1 (batch #229)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Nanchong Automobile Co., Ltd. (China)
Chassis:	EQ6607KS	Passenger capacity:	24-35
Engine:	YC4F115-30 / YC4F100-30...	Wheelbase (mm):	3300
Displacement (cc):	2659 / 2659 / 3298	Dimensions (mm):	6640 × 2280 × 2800/3000
Power (kW):	85 / 75 / 79	Gross weight (kg):	5830

#207

Dongfeng DFA6600KX3C (batch #229)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6570K3AC1	Passenger capacity:	24-35
Engine:	YC4F100-30 CY4102-C3E...	Wheelbase (mm):	3300
Displacement (cc):	2659 3856 3856 2540 2540...	Dimensions (mm):	6004 × 2260 × 2630/2830
Power (kW):	75 75 70 67 67 73 72	Gross weight (kg):	5700

#208

Dongfeng EQ6660PT6 (batch #229)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Special Automobile Co., Ltd. (China)
Chassis:	EQ6570K3AC1	Passenger capacity:	24-35
Engine:	YC4F100-30 CY4102-C3E...	Wheelbase (mm):	3300
Displacement (cc):	2659 3856 3856 2540 2540...	Dimensions (mm):	6570 × 2250 × 2780/2990
Power (kW):	75 75 70 67 67 73 72	Gross weight (kg):	6500

#209

Dongfeng DFA6810HX3G (batch #229)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6780HX3AC	Passenger capacity:	24-53
Engine:	4DX23-130E3	Wheelbase (mm):	3800
Displacement (cc):	3857	Dimensions (mm):	8100 × 2360 × 2920/3120
Power (kW):	101	Gross weight (kg):	8500

#210

Dongfeng DFA6820KB05 (batch #229)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6770T3AC1	Passenger capacity:	10-45
Engine:	YC4F115-30 / CY4102-C3C	Wheelbase (mm):	3800, 3900, 4000
Displacement (cc):	2659 / 3856	Dimensions (mm):	8100 × 2400 × 2860
Power (kW):	85 / 88	Gross weight (kg):	8130

#211

Dongfeng DFA6600KX4C (batch #228)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6570K4AC1	Passenger capacity:	24-30
Engine:	CY4102-CE4D / YC4FA115-40	Wheelbase (mm):	3300
Displacement (cc):	3856 / 2982	Dimensions (mm):	6004 × 2260 × 2800/3000
Power (kW):	83 / 85	Gross weight (kg):	5700

#212

Dongfeng DFA6720KX4B (batch #228)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6692K4AC	Passenger capacity:	24-47
Engine:	YC4FA120-40 / CY4102-CE4C	Wheelbase (mm):	3800
Displacement (cc):	2982 / 3856	Dimensions (mm):	7248 × 2260 × 2820/3020
Power (kW):	88 / 91	Gross weight (kg):	7200

#213

Dongfeng EQ6660S4D (batch #228)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Motor Co., Ltd. (China)
Chassis:	EQ6570KS4D	Passenger capacity:	24-43
Engine:	YC4FA115-40	Wheelbase (mm):	3300
Displacement (cc):	2982	Dimensions (mm):	6600 × 2300 × 2800/3000
Power (kW):	85	Gross weight (kg):	6500

#214

Dongfeng EQ6730S4D (batch #228)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Motor Co., Ltd. (China)
Chassis:	EQ6690KS4D1	Passenger capacity:	24-48
Engine:	YC4FA130-40	Wheelbase (mm):	3800
Displacement (cc):	2982	Dimensions (mm):	7255 × 2300 × 2930/3100
Power (kW):	95	Gross weight (kg):	7250

#215

Dongfeng EQ6760PC2 (batch #228)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Nanchong Automobile Co., Ltd. (China)
Chassis:	EQ6690KSD3G1	Passenger capacity:	29-48
Engine:	CY4102-C3C YC4D130-30...	Wheelbase (mm):	3800
Displacement (cc):	3856 4214 5638 3857 3857...	Dimensions (mm):	7595 × 2360 × 2980/3160
Power (kW):	88 96 104.2 101 90 98 91	Gross weight (kg):	7845

#216

Dongfeng EQ6850ZD3G (batch #228)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Motor Co., Ltd. (China)
Chassis:	EQ6800KSD3G	Passenger capacity:	24-54, 24-60
Engine:	YC4E160-30 EQH160-30	Wheelbase (mm):	3900
Displacement (cc):	4260 4752	Dimensions (mm):	8460 × 2440 × 3000/3200
Power (kW):	118 118	Gross weight (kg):	10800

#217

Dongfeng EQ6730ZD3G (batch #228)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Motor Co., Ltd. (China)
Chassis:	EQ6690KSD3G1	Passenger capacity:	24-47
Engine:	CY4102-C3C YC4D130-30...	Wheelbase (mm):	3800
Displacement (cc):	3856 4214 5638 3857 3857...	Dimensions (mm):	7255 × 2300 × 2930/3100
Power (kW):	88 96 104.2 101 90 98 91	Gross weight (kg):	7250

#218

Dongfeng EQ6600S4D2 (batch #227)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Motor Co., Ltd. (China)
Chassis:	EQ6570KS4D1	Passenger capacity:	24-38
Engine:	YC4FA100-40	Wheelbase (mm):	3300
Displacement (cc):	2982	Dimensions (mm):	6010 × 2300 × 2800/3000
Power (kW):	75	Gross weight (kg):	5900

#219

Dongfeng DFA6600KX3C1 (batch #227)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6570K3AC	Passenger capacity:	24-30
Engine:	YC4F115-30 CY4102-D3A...	Wheelbase (mm):	3308
Displacement (cc):	2659 3856 3298 3660 3856...	Dimensions (mm):	6004 × 2260 × 2630/2830
Power (kW):	85 88 79 81 88 82 81...	Gross weight (kg):	5300

#220

Dongfeng DFA6810HX3G (batch #227)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6780HX3AC	Passenger capacity:	24-53
Engine:	4DX23-130E3	Wheelbase (mm):	3800
Displacement (cc):	3857	Dimensions (mm):	8100 × 2360 × 2920/3120
Power (kW):	101	Gross weight (kg):	8500

#221

Dongfeng DFA6820KB05 (batch #227)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6770T3AC1	Passenger capacity:	10-45
Engine:	YC4F115-30 / CY4102-C3C	Wheelbase (mm):	3800, 3900, 4000
Displacement (cc):	2659 / 3856	Dimensions (mm):	8100 × 2400 × 2860
Power (kW):	85 / 88	Gross weight (kg):	8130

#222

Dongfeng EQ6790PTX (batch #226)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Special Automobile Co., Ltd. (China)
Chassis:	EQ6770T3AC2	Passenger capacity:	24-50
Engine:	YC4E140-30 CA4DF3-13E3...	Wheelbase (mm):	3800, 3900
Displacement (cc):	4260 4752 4752	Dimensions (mm):	7940 × 2430 × 3060/3290
Power (kW):	105 101 105	Gross weight (kg):	9400

#223

Dongfeng EQ6607PT8 (batch #226)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Special Automobile Co., Ltd. (China)
Chassis:	EQ6570K3AC1	Passenger capacity:	24-31
Engine:	YC4F100-30 CY4102-C3E...	Wheelbase (mm):	3300
Displacement (cc):	2659 3856 3856 2540 2540...	Dimensions (mm):	6005 × 2250 × 2780/2990
Power (kW):	75 75 70 67 67 73 72	Gross weight (kg):	5800

#224

Dongfeng EQ6731PT3 (batch #226)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Special Automobile Co., Ltd. (China)
Chassis:	EQ6690K3AC	Passenger capacity:	24-41
Engine:	YC4F115-30 CY4102-D3A...	Wheelbase (mm):	3800
Displacement (cc):	2659 3856 3856 4214 3760	Dimensions (mm):	7280 × 2250 × 2850/3060
Power (kW):	85 88 88 96 90	Gross weight (kg):	7400

#225

Dongfeng EQ6660PCN31 (batch #220)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Nanchong Automobile Co., Ltd. (China)
Chassis:	EQ6580KSN30	Passenger capacity:	24-35
Engine:	NQ115N	Wheelbase (mm):	3300
Displacement (cc):	3759	Dimensions (mm):	6640 × 2280 × 2800/3000
Power (kW):	85	Gross weight (kg):	5830

#226

Dongfeng EQ6660PC1 (batch #220)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Nanchong Automobile Co., Ltd. (China)
Chassis:	EQ6607KS	Passenger capacity:	24-35
Engine:	YC4F115-30 / YC4F100-30...	Wheelbase (mm):	3300
Displacement (cc):	2659 / 2659 / 3298	Dimensions (mm):	6640 × 2280 × 2800/3000
Power (kW):	85 / 75 / 79	Gross weight (kg):	5830

#227

Dongfeng DFA6600KX3C (batch #220)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6570K3AC1	Passenger capacity:	24-35
Engine:	YC4F100-30 CY4102-C3E...	Wheelbase (mm):	3300
Displacement (cc):	2659 3856 3856 2540 2540...	Dimensions (mm):	6004 × 2260 × 2630/2830
Power (kW):	75 75 70 67 67 73 72	Gross weight (kg):	5700

#228

Dongfeng DFA6720KX3B1 (batch #217)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6693K3AC	Passenger capacity:	24-44
Engine:	YC4FA130-30 / YC4F115-30	Wheelbase (mm):	3800
Displacement (cc):	2982 / 2659	Dimensions (mm):	7200 × 2260 × 2800/3035
Power (kW):	95 / 85	Gross weight (kg):	7450

#229

Dongfeng DFA6920HX4E (batch #217)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6900HX4AC	Passenger capacity:	24-80
Engine:	YC4E140-42 / YC4E160-42	Wheelbase (mm):	4500
Displacement (cc):	4260 / 4260	Dimensions (mm):	9150 × 2500 × 3000/3150
Power (kW):	105 / 118	Gross weight (kg):	11000

#230

Dongfeng EQ6660PT6 (batch #217)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Special Automobile Co., Ltd. (China)
Chassis:	EQ6570K3AC1	Passenger capacity:	24-35
Engine:	YC4F100-30 CY4102-C3E...	Wheelbase (mm):	3300
Displacement (cc):	2659 3856 3856 2540 2540...	Dimensions (mm):	6570 × 2250 × 2780/2990
Power (kW):	75 75 70 67 67 73	Gross weight (kg):	6500

#231

Dongfeng DFA6810HX3G (batch #216)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6780HX3AC	Passenger capacity:	24-53
Engine:	4DX23-130E3	Wheelbase (mm):	3800
Displacement (cc):	3857	Dimensions (mm):	8100 × 2360 × 2920/3120
Power (kW):	101	Gross weight (kg):	8500

#232

Dongfeng DFA6820KB05 (batch #216)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6770T3AC1	Passenger capacity:	10-45
Engine:	YC4F115-30 / CY4102-C3C	Wheelbase (mm):	3800, 3900, 4000
Displacement (cc):	2659 / 3856	Dimensions (mm):	8100 × 2400 × 2860
Power (kW):	85 / 88	Gross weight (kg):	8130

#233

Dongfeng EQ6790PTX (batch #216)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Special Automobile Co., Ltd. (China)
Chassis:	EQ6770T3AC2	Passenger capacity:	24-50
Engine:	YC4E140-30 / CA4DF3-13E3	Wheelbase (mm):	3800, 3900
Displacement (cc):	4260 / 4752	Dimensions (mm):	7940 × 2430 × 3060/3290
Power (kW):	105 / 101	Gross weight (kg):	9400

#234

Dongfeng DFA6600KX3C1 (batch #215)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6570K3AC	Passenger capacity:	24-30
Engine:	YC4F115-30 CY4102-D3A...	Wheelbase (mm):	3308
Displacement (cc):	2659 3856 3298 3660 3856...	Dimensions (mm):	6004 × 2260 × 2630/2830
Power (kW):	85 88 79 81 88 82 81...	Gross weight (kg):	5300

#235

Dongfeng EQ6607PT8 (batch #211)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Special Automobile Co., Ltd. (China)
Chassis:	EQ6570K3AC1	Passenger capacity:	24-31
Engine:	YC4F100-30 / CY4102-C3E...	Wheelbase (mm):	3300
Displacement (cc):	2659 / 3856 / 3856...	Dimensions (mm):	6005 × 2250 × 2780/2990
Power (kW):	75 / 75 / 70 / 67	Gross weight (kg):	5800

#236

Dongfeng DFA6810HX3G (batch #211)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6780HX3AC	Passenger capacity:	24-53
Engine:	4DX23-130E3	Wheelbase (mm):	3800
Displacement (cc):	3857	Dimensions (mm):	8100 × 2360 × 2920/3120
Power (kW):	101	Gross weight (kg):	8500

#237

Dongfeng EQ6660PCN31 (batch #207)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Nanchong Automobile Co., Ltd. (China)
Chassis:	EQ6580KSN30	Passenger capacity:	24-35
Engine:	NQ115N	Wheelbase (mm):	3300
Displacement (cc):	3759	Dimensions (mm):	6640 × 2280 × 2800/3000
Power (kW):	85	Gross weight (kg):	5830

#238

Dongfeng EQ6730ZD3G (batch #203)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Motor Co., Ltd. (China)
Chassis:	EQ6690KSD3G1	Passenger capacity:	24-47
Engine:	CY4102-C3C YC4D130-30...	Wheelbase (mm):	3800
Displacement (cc):	3856 4214 5638	Dimensions (mm):	7255 × 2300 × 2930/3100
Power (kW):	88 96 104.2	Gross weight (kg):	7250

#239

Dongfeng EQ6850ZD3G (batch #203)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Motor Co., Ltd. (China)
Chassis:	EQ6800KSD3G	Passenger capacity:	24-54, 24-60
Engine:	YC4E160-30	Wheelbase (mm):	3900
Displacement (cc):	4260	Dimensions (mm):	8460 × 2440 × 3000/3200
Power (kW):	118	Gross weight (kg):	10800

#240

Dongfeng EQ6731PT3 (batch #202)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Special Automobile Co., Ltd. (China)
Chassis:	EQ6690K3AC	Passenger capacity:	24-41
Engine:	YC4F115-30 / CY4102-D3A...	Wheelbase (mm):	3800
Displacement (cc):	2659 / 3856 / 3856...	Dimensions (mm):	7280 × 2250 × 2850/3060
Power (kW):	85 / 88 / 88 / 96	Gross weight (kg):	7400

#241

Dongfeng EQ6660PC1 (batch #201)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Nanchong Automobile Co., Ltd. (China)
Chassis:	EQ6607KS	Passenger capacity:	24-35
Engine:	YC4F115-30 / YC4F100-30...	Wheelbase (mm):	3300
Displacement (cc):	2659 / 2659 / 3298	Dimensions (mm):	6640 × 2280 × 2800/3000
Power (kW):	85 / 75 / 79	Gross weight (kg):	5830

#242

Dongfeng EQ6607PT8 (batch #201)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Special Automobile Co., Ltd. (China)
Chassis:	EQ6570K3AC1	Passenger capacity:	24-31
Engine:	YC4F100-30 / CY4102-C3E...	Wheelbase (mm):	3300
Displacement (cc):	2659 / 3856 / 3856...	Dimensions (mm):	6605 × 2250 × 2780/2990
Power (kW):	75 / 75 / 70 / 67	Gross weight (kg):	5800

#243

Dongfeng DFA6600KX3C (batch #201)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6570K3AC1	Passenger capacity:	24-30
Engine:	YC4F100-30 / CY4102-C3E...	Wheelbase (mm):	3300
Displacement (cc):	2659 / 3856 / 3856...	Dimensions (mm):	6004 × 2260 × 2630/2830
Power (kW):	75 / 75 / 70 / 67	Gross weight (kg):	5300

#244

Dongfeng DFA6810HX3G (batch #200)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6780HX3AC	Passenger capacity:	24-53
Engine:	4DX23-130E3	Wheelbase (mm):	3800
Displacement (cc):	3857	Dimensions (mm):	8100 × 2360 × 2920/3120
Power (kW):	101	Gross weight (kg):	8500

#245

Dongfeng EQ6660PT6 (batch #193)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Special Automobile Co., Ltd. (China)
Chassis:	EQ6570K3AC1	Passenger capacity:	24-35
Engine:	YC4F100-30 / CY4102-C3E...	Wheelbase (mm):	3300
Displacement (cc):	2659 / 3856 / 3856...	Dimensions (mm):	6570 × 2250 × 2780/2990
Power (kW):	75 / 75 / 70 / 67	Gross weight (kg):	6500

#246

Dongfeng EQ6731PT3 (batch #193)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Special Automobile Co., Ltd. (China)
Chassis:	EQ6690K3AC	Passenger capacity:	24-41
Engine:	YC4F115-30 / CY4102-D3A...	Wheelbase (mm):	3800
Displacement (cc):	2659 / 3856 / 3856...	Dimensions (mm):	7280 × 2250 × 2850/3060
Power (kW):	85 / 88 / 88 / 96	Gross weight (kg):	7400

#247

Dongfeng DFA6820KB05 (batch #180)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6770T3AC1	Passenger capacity:	10-45
Engine:	YC4F115-30 / CY4102-C3C	Wheelbase (mm):	3800, 3900, 4000
Displacement (cc):	2659 / 3856	Dimensions (mm):	8100 × 2400 × 2860
Power (kW):	85 / 88	Gross weight (kg):	8530

#248

Dongfeng DFA6810HX3G (batch #179)

Dongfeng primary school bus manufactured in China
Manufacturer:	Dongfeng Automobile Co., Ltd. (China)
Chassis:	EQ6780HX3AC	Passenger capacity:	24-48
Engine:	4DX23-130E3	Wheelbase (mm):	3800
Displacement (cc):	3857	Dimensions (mm):	8100 × 2360 × 2920/3120
Power (kW):	101	Gross weight (kg):	8500

Dongfeng primary school bus