Engine JAC HFC4DA1-2C. Manual — part 2
Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
7
Section III Performance Curve of Engine
0
50
100
150
200
250
300
100
0
120
0
140
0
160
0
180
0
200
0
220
0
240
0
260
0
280
0
300
0
320
0
340
0
360
0
转速（r p m ）
扭矩
（N
m
）
0
10
20
30
40
50
60
70
80
90
功率
（k
w
）
扭矩
功率
200
210
220
230
240
250
260
270
280
100
0
120
0
140
0
160
0
180
0
200
0
220
0
240
0
260
0
280
0
300
0
320
0
340
0
360
0
转速（r pm ）
油
耗
率
（
g/
kw.h
）
0
5
10
15
20
25
油耗
量（
k
g
/
h
）
油耗率
油耗量
Torque
Power
To
rq
u
e
Po
we
r
Speed
Fuel consumption
Fuel consumption
Fuel consump
tion (g/kw
.h)
Fuel c
ons
ump
tion (kg/h)
Speed
Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
8
Section IV Main Checking and Adjustment Parameters
1、At rated power:
(1) Exhaust temperature (master pipe) (ºC)
(2) Thermostat opening temperature (ºC)
(3) Thermostat full open temperature (ºC)
(4) Temperature of engine oil in main oil way (ºC)
(5) Engine oil pressure (kPa)
≤700
82
95
≤130
400～600
2. Engine oil pressure at minimum stable speed (kPa)
≥98
3. Timing phase (in rotation angle of crankshaft)
(1) Open of intake valve (before top dead center)
(2) Close of intake valve (after bottom dead center)
(3) Open of exhaust valve (before bottom dead center)
(4) Close of exhaust valve (after top dead center)
24.5°
55.5°
54°
26°
4. Valve clearance (mm)
0.3～0.4
Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
9
Section V Tightening Torque for Critical Bolts of Engine
Comparison Table of Tightening Torque for Critical Bolts
☆
No.
Description
N．m
1
Fixing bolt of rockshaft
55
2 Heater
plug
25
3
Nut and washer for fuel injector body
40
4 Fuel
injector
34
5
Fixing bolt of thermostat housing assembly
25
6
Installation torque of rocker arm assembly
55
7
Camshaft thrust plate bolt
25
8
Camshaft timing gear bolt
110
9
Fixing bolt of rockshaft
50
10
Fixing bolt of engine oil pump filter screen assembly
20
11
Engine oil pump fixing bolt
20
12 Oil
sump
bolt
23.5
13 Flywheel
baffle
bolt
85
14
Flywheel bolt
25 for first step
70 for second step
120 for third step
15
Crankshaft bearing cap bolt
20 for first step
110 for second step
170 for third step
16
Tightening bolt of engine oil pump
25
17
Socket nut of engine oil pump
30
18
Torque for cylinder head bolt:
65 for first step
85 for second step
105 for third step
19 Rockshaft
support
bolt
55
20
Main bearing cap bolt
170
21
Torque for drive shaft nut
66
22 Transmission
bracket
nut
69
23
Clutch cover – flywheel housing bolt
M10：46
M12：91
24
Engine rear bracket nut and bolt
M10：40
M12：69
25
Front exhaust pipe bolt
37
26
Clutch working cylinder bolt
19
Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
10
No.
Description
N．m
27 Belt
pulley
bolt
210
28 Fan
pulley
12.5
29
Crankshaft bearing cap bolt
170
30
Connecting rod bearing cap bolt
25 for first step
85 for second step
31 Camshaft
timing
gear
110
32
Fuel injection pump nut
30
33
Idler gear bolt
20
34
Engine oil pipe perforated bolt
20
35
Crankshaft belt pulley bolt
210
36 Fan
silicone
oil
clutch
12.5
37
Connecting rod bearing cap
20 for first step
85 for second step
38
Piston cooling oil pipe bolt
M8×1.25 25
M6×1.00 7.5
39
Oil pressure regulation valve
M6×1.5 30
40
Socket nut of engine oil pump
30
41
Engine oil pump assembly bolt
25
42 Oil
sump
bolt
23.5
43
Cylinder head bolt
65 for first step
85 for second step
105±5 for third step
44 Rockshaft
support
bolt
55
45
Tightening bolt of water outlet pipe
19
46
Protrusion size of water pump impeller
24.6mm
47
Fan center distance
79.2～79.8 m
48
Open temperature of thermostat valve
82 ℃
49
Full open temperature of thermostat valve
95℃
50
Open pressure of vacuum valve at center of radiator
cap valve seat
88．2～117．6 kPa
51
Water pump fixing bolt
25 N.m
52
Alternator fixing bolt
40 N.m
53
Alternator adjustment plate fixing bolt
25 N.m
54
Lock nut, A/C compressor idler gear
27 N.m
55
Nut of engine oil cooler water pipe
25
56 Oil
drainage
plug
80
57
Fixing bolt of oil pump assembly
20
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