Yanmar 3JH3E Service Manual page 45

CHAPTER 3
FUEL INJECTION EQUIPMENT
Printed in Japan
lllNSHI-H8009
1. Fuel Injection Pump Service Data··················3-1
1-1 3JH3(B)(C)E··········································3·1
1-2 4JH3(B)(C)E ····· ······ ···•· ······ ······· ·············3-1
2. Governor ················································3-4
2-1 Cold start knob ( For 4JH3(B)(C)E only) ·········3-4
2-1 Disassembly Reassembly
and Inspection of Governor ·········3-6
2-3 Assembling governor ······•······· ········· ····3-1 0
3. Disassembly, Reassembly and
Inspection of Fuel Injection pump ·········3-14
3-1 Disassembly of fuel injection pump ·········3-15
3-2 Inspection of fuel injection pump ·•··· ····· ··3-19
3-3 Reassembly of fuel injection pump············3-20
4. Adjustment of Fuel Injection Pump and Governor ···3-24
4-1 Preparations ·· ······ ··········· ···· ······•· ···· ··· ·3-24
4-2 Adjustment of top clearance ·· ·· ··•··· ···· ····4-25
4-3 Adjusting of injection timing ·····················3·26
4-4 Plunger pressure test ········ ····· ··············3-27
4-5 Delivery valve pressure test •······•··•····· ··3-27
4-6 Adjusting injection volume
(uniformity of each cylinder) ·········3-27
4-7 Adjustment of governor ························3-28
5. Fuel Feed Pump ··· ··· ··· ······ ··· ··· ··· ··· ···· ·· ··· ··· ···3-30
5-1 Construction of fuel feed pump ···············3-30
5-2 Fuel feed pump specifications··················3-30
5-3 Disassembly and reassembly of fuel feed pump · · · · · · 3-31
5-4 Plunger pressure test ··•·•·•··•···· ··· ···•· ·····3-27
6. Fuel Injection Nozzle ·································3-32
6-2 Functioning of fuel injection nozzle ·········3-32
6-2 Fuel injection nozzle disassembly ········ ··· ·3-33
6-3 Fuel injection nozzle inspection ··········· ····3-34
6-4 Fuel injection nozzle reassembly ············3-34
6-5 Adjusting fuel injection nozzle················ ··3-35
7. Trouble shooting of fuel injection pump ······3-36
7-1 Troubleshooting of fuel injection pump ······3-36
7-2 Major faults and troubleshooting ············3-36
8. Tools ······················································3-38
9. Fuel filter ··•··· ········· ······ ·················· ··· ······3-40
9-1 Fuel filter specifications ········ ········ ···· ····3-40
9-2 Fuel filter inspection ·············· ········ ········3-40
10. Fuel Tank ················································3-41
11. Troubleshooting (Concerning engine
fuel injection equipment) ······3-42