Lovol 1004-4, User Handbook Manual, Page: 59 / 87

The Adjustment of the Static Fuel Pump Timing of Linear Pumps (homemade)
1. Based on the instructions in Page 17A.04 in the Workshop Manual, make marks to indicate the position when
the piston of the first cylinder is at top dead center. The marks should be made on the gear housing cover and the
pulley respectively.
2. Dismount the high-pressure fuel pipes of the first cylinder, and pull the fuel amount control bar to its maximum
position. Turn the crankshaft clockwise viewed from the front end of the engine, until the piston of the first
cylinder reaches TDC.
3. Turn the crankshaft anticlockwise at an angle of over 60°. Then turn the crankshaft clockwise slowly, meanwhile
observe the fuel level in the fuel outlet valve. As soon as the fuel level begins to fluctuate, indicating the
beginning of fuel supply of the first cylinder, you should stop turning the crankshaft. Measure the angle between
the line on the gear housing cover and that on the belt pulley, namely the fuel supply angle. If the latter line is
before the former line, then the fuel is supplied in advance. Otherwise, the fuel supply is retarded.
4. The fuel supply angles of various types of engines are listed below.
Engine type
110Ti 135Ti 160Ti
180Ti 210Ti 230Ti
Pump type 7100 VE 7100 7100 7100 7100
Fuel Pump
Timing
10°±1° 0
—
1.35 mm 8°±1° 8°±1° 8°±1° 8°±1°
Engine type
1004-4 1004-4T
1006-6T 1004-4TW 1004-4TA 1006-6TW
Pump type AD AD AD VE VE AD
Fuel Pump
Timin
18°±1° 12°±1° 16°±1°
0—
0.3 mm
0—
0.4 mm 14°±1°
Attention:
For The Fuel Pump Timing of different Engine type, contact perkins lovol Engine (Tianjin) co.,Ltd
5. If the fuel supply angle is not desirable, then it can be adjusted by using the holes on the flange at pump end
after loosening the nuts on the pump bracket and the flange at pump end. The fuel supply angle can be increased
by leaning the pump toward the engine. Otherwise it can be decreased. Corresponding to 1mm distance moved
by the outer edge of the pump flange, the fuel supply angle will be adjusted at about 1°CA.
6. Once the fuel supply angle becomes suitable, the nuts on the flange at the pump end, and the bolts on the pump
bracket, should be screwed down to the required torque. Then repeat step 3 and check the fuel supply angle.
Note: the arc length corresponding to 1°crank angle=
π
D/360(mm) D—pulley diameter (mm).
10.02