Testing Fuel Return Rate And Leakage - Komatsu PC88MR-10 Shop Manual

Hydraulic excavator

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Table of Contents

Testing fuel return rate and leakage

A: Measuring position of leakage from pressure

B: Measuring position of return rate from injector

1. Fuel tank

2. Pre-filter

3. Priming pump

4. Fuel filter

5. Feed pump

6. SCV (Suction control valve)

7. Common rail pressure

9. Pressure limiter

10. Supply pump

11. Fuel cooler

30 Testing and adjusting

(PC88MR-AE20-360-K-01-A)

a Testing tools

6151-51-8490 Spacer

6206-71-1770 Joint

07005-01012 Seal washer

Commercially

Commercially

Commercially

Commercially

Place the machine on a level ground, and

lower the work equipment to the ground.

Be careful not to touch any hot parts when

installing or removing the testing tools.

a Since fuel flows out during the test, prepare an

oil pan (container to catch the fuel) of

approximately 20 l.

Engine and cooling system

Measuring cylinder

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