140-3 SERIES
12-247
TROUBLESHOOTING E-26
Note 1: Carry out inspection, maintenance, and replacement of the filter and strainer as follows.
1) Gauze filter
Disassemble and inspect. If it is clogged, clean it.
2) Strainer on upstream side of gauze filter
If the gauze filter is clogged, clean the upstream strainer also.
3) Fuel filter
If the problem is not solved even when Steps 1) and 2) above have been carried out, replace the fuel fil-
ter.
Note 2: If the equipment in the low-pressure circuit is defective, inspect the following points.
1) Remaining amount of fuel
2) Stuck, worn feed pump
3) Leakage, clogged low-pressure fuel piping
4) Defective operation of bypass valve, mistaken assembly of other parts (see Fig. 1)
5) Fuel entering oil pan (fuel leakage inside head cover)
Fig. 1 Installation position of overflow valve , bypass valve , fuel inlet port joint (with gauze filter)
• Overflow valve : Spring can be seen from hole at nut end
• Bypass valve : Gauze filter can be seen from both holes
• Fuel inlet port joint : Spring can be seen from both holes
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